flaming-ford

iTrader: (7)

i'm sure this has been asked tons of times but, i searched and can't find the answer in 10 mins of looking so here go's.

i've got an 89 tpi 305 5 spd iroc camaro. it has headers catback airfoil k&n filters and some other little things, what should i expect this thing to pull for a top speed, just curious as it feels a little lacking to me considering how much power it has before 100mph or so.

i've heard of l98 car guys say they can pull over 140 i would suspect i should do about the same with my bolt ons but, maybe i'm being overly optimistic.
lmk just curious.

Adrians91Z28

i think i saw somewhere that our 305 tpi cars will top out at 135 to 145 range .. stock

now i dont know if it depends on the year b/c all the motors had different hp/tq due to different cams / heads ..

flaming-ford

iTrader: (7)

any1 with a 305 5 spd maro feel like commenting about this on there personal experiences?

mine the only time i ever realy ran it out seemed to stop pulling at 125. i do have a small vaccumm leak tho also have 22# injectors installed instead of factory 19s plus the fuel pressure at the time was about 7 lbs higher than it is now. I think it was just running way to rich before making it flood itself out at a higher rpm. That added to the fact that the plugs have about 40k miles on them, the dizzy has 205k on it, cap n rotor have to be nasty as i dont have louvers on the car and havent for quite some time (**** loads of condensation i'll bet).

anyways yah still curious what i should be able to pull speed wise...... i know tpi sucks up top but, i cant imagine my car should kneel over at 125 i figure 140 or so at least considering my mild mods and the engine is very fresh.

chevboy28

none of the above it'll shut down at 110 i believe i put 4.10s in mine and it shut down at 82

flaming-ford

iTrader: (7)

111 to be perfectly correct thanks smart *** lol j/p buddy.

no i mean realistically what is its physical limitations taking in to consideration it's power and drag coefficient that sorta thing.

my old rs turned off at 111 also.....

someone may have a hypercrap chip or something in mine as they have a lower temp thermostat and fan switch on it never looked. I know mione doesn't turn off until after 125 tho for sure lol.

Adrians91Z28

i was watching the old "review" video of the convertible 91 camaro on here .. and i thought he mentioned that it would top out around 135 .. i dont see why not .. unless you got a older camaro w/ less hp and tq .. or youve changed the gears ..

mine is pretty modified now .. and whenever i get on a track to find out ill let yall know ..

Saculia

iTrader: (1)

I have a 91 formula WS6 5 speed with 3.42 posi rear. I have done well over 140. In fact I have taken the needle past the MPH sign on the speedo. The car was right around 4600 rpm when I did that and it seemed like it could do a little better. The car was basically stock with the exception of power pulleys, MSD blaster coil and wires and muffler eliminator, and lowering springs in the front. They can go if they run right.

Fast355

iTrader: (2)

Maybe this will answer some of your questions as to what a LB9 305 will do, I have one in a 5,500 lbs G20 van with the aero of a giant brick wall. 3.08 gears out back and a 700r4 transmission.

This was on the long climb into New Mexico from Texas, A/C blasting in the Texas heat. Towing an empty 20 ft. enclosed trailer (~3,500 lbs) at the time.

[IMG][/IMG]



This was on a steeper grade, passing semi's and 4 cylinder cars left and right. I am merciless on the poor little 305.

flaming-ford

iTrader: (7)

no kidding wow thats pretty quick sounds like you may have a freak of nature on your hands.

yah 5500 lb van cruising and pulling a 20 ft enclosed trailer running 3k rpms at 90..... thats scary plenty of power 4 sure.

Fast355

iTrader: (2)

Thats what worked over swirl ports, TPI, Mild Roller cam, and Tri-Y headers do for you, make TONS of GRUNT to urge heavy moving objects forward at rediculously low RPMs.

WOT from a 20 mph roll, then some lane changing, including WOT passing.



This is a WOT punch, UPHILL, unloaded, mind you 3.08 gears. You can get a glance at how steep the ramp is through the driverside of the windshield at T-35 seconds.




This is just everyday normal driving, not cresting 2,000 rpm at any time. Probably no more than 1/4 throttle.

Dale

iTrader: (12)

As mentioned, the computer will stop it not long after 100mph.

Now with that removed. So many more things come into play.
condition of car due to age
tire friction
wind drag, wind with you, etc.
gearing
motor power
ecm tune for the mods

and I'm sure tons more.

Fast355

iTrader: (2)

Most TPI engines lack a speed limiter or rpm limiter.

1991CamaroRslow

iTrader: (3)

The top speed limiter in a TPI equipped vehicle is 255mph, you'll never hit that. The rev limiter is over 10,000; good luck getting to that. An automatic TPI eqiupped vehicle with factory gearing will do over 130mph, prime examples will pull over 140 a friend of mine spent time in jail proving this point and had the radar gun reading to prove it. It'll take you a while to get it up there but it'll make it if you keep your foot in the pedal.

Fast355

iTrader: (2)

I can tell you that when Car and Driver or maybe it was Road and Track, tested the 1986 Irocs, they got 139 MPH from the L69 and 145 MPH from the LB9. These were 1986 cars, the 190 HP 305 TPI and the 180 HP L69, LB9 had a 700r4 and the L69 a T-5.

1991CamaroRslow

iTrader: (3)

That sounds about right. I realize the factory speedo's aren't that accurate but the guy who got arrested for over 140 in his TPI Camaro took me for a ride in his 89 Formula 350 and burried the speedo needle, it was running right at 4500rpm in overdrive with 3.27 gears. He says this car with the 350 TPI and actually feels lazier on the top end, probably due to gearing, I bet his old car had 3.42's swapped in it. Both cars had the 140 speedo and would bury them, the blue Iroc was clocked and he had to serve weekends due to the speed he was running so yeah; stock TPI cars can really get up there. TBI cars do limit out at 115. As mentioned the carb cars could run around what the TPI cars of the time did.

8T9 BANDIT

i ounce buried my speedometer, this was a long time ago, mods were airfoil, k+n, ads superchip. everything else was bone stock.. at about 140 the car started to feel like a hovercraft. and that was that. maybe ill try it again one day with my mods, oh, that chip has come out since then.

Adrians91Z28

so i wasnt that far off thinking that it was around 130 - 140 for a 305 tpi ..

hell my supercharged 89 mr2 will go 135 stock and it only has 145 hp / weighs 2600 pounds (only 500 or so less than a camaro)

FormulaL98

I held my Formula for 2 miles and got it just too 140, i figured i didnt need to go any faster lol. car felt really good though

flaming-ford

iTrader: (7)

well then sounds like i'm lacking considering my mods then hm..... probably should run 150 i'd guess well thats all i needed to hear guess i need to get her tuned up and then truly tune the engine...


mine felt dead around 110 i know that......

pulled 125 maybe 130 but, that was all she wrote.

Shadygrady

iTrader: (3)

My experience is if they do have a speed limiter its around 145.In 1998 I bought a 87 T/A lb9.It was bone stock.Not sure of the gears in it but from what I remember it pulled about 2 grand at 80 mph,so prolly 2.73.This was when I used to drink so I dont condone this type of driving but I did do it a couple pf times on the interstate about 3 or 4 in the morning.The car was in perfect condition and only had about 40,000 miles when I did this.Had 33,000 when I bought it.It made it to 145 a couple of times briefly,but it would only do it going down a slight.When it got there it would seem like it lost fuel and wouldnt accelerate anymore.It would coast down to about 135 or 140 before it seemed to get it`s fuel back.Do not attempt this.If you have a wreack going that fast they will be scrapping pieces of you off the road for about a mile.Cars a head of you doing 70 look in there rearview and you`re a long way away.they may decide to change lanes and you`ll be on them in a second going that fast.Happened to me.but I swerved and missed them.scared me to death the next day when I sobered up and remembered what I did.Sorry for the novel.

DukeofHurl

I have a '86 LB9/700R4 2.73 rear. I had this car up to 120 on a 2 lane country road it was still pulling. Got scared since the cows do get out every now and then. Probably was a stupid idea

1991CamaroRslow

iTrader: (3)

You probably hit valve float when your car felt like it was topping off. On a side note my Camaro with a TH350 and 3.27 gears fires off the shift light about 40 feet before the end of the quarter doing right at 100mph. It will take the tach right up to 6000 and rev limit if I stay in it (personally set rev limiter via Digicon).

flaming-ford

iTrader: (7)

naa i know thats not true its a fairly newly rebuilt engine and i wind it out to 5,500 and even higher pretty often.... (on accident from over burning tires and such normally).

it's just way outa tune i think. Worn out dizzy, fairly old plugs, injectors aren't correct for the engine fp probably isnt perfect, timings probably to far advanced.

i dunno i'll get the above mostly taken care of tomorow if i get enuff sunshine to do much....

i hope to throw a set of roller rockers on it along with new plugs and play with the base timing and the fuel pressure some, maybe ohm the injectors too, probably wouldn't b a bad idea.

flaming-ford

iTrader: (7)

well i checked out some stuff today.

the injectors have a yellow top so i would suspesct they are accel (probably not a good thing but, anyways). They all ohm'd out to 15 ohms except 1 ohmed out at 14 so i'd say they are fine.

i added a new set of ac delco plugs. That seemed to help. also bumped the fuel pressure up to just below how it was before i started tweeking with it. Man i sure hope i dont have to do that soon again. Edelbrock headers + spark plug removal = about a 2 hr job for me it sucked..........

bought a timing light and checked it, it's way off...... Yes i did pull the est btw...... I'm a good 8* further advance than i should be. This i would guess is probably y my engine is wanting so much fuel pressure..... Basically to keep it out of knock since to much timing acts much like an overly lean condition. didn't set it yet as theres some vaccum lines and junk in the way of turning the dizzy hold down bolt lose.... I think it was probably the egr controller or something but, i didnt pay much attention i ran out of light and its getting cold outside again....

anyways i hope to get my other set of valve covers on it and my 1.6 roller rockers also as soon as i get this bitch back in time...... looks like it's going to take a while to do that because, i have to remove an aftermarket tube style coil from right above it and get whatever else is in the way of turning that bolt out looks like an easy 5 minute timing job turned in to an hour most likely....... I suppose i'll leave the pressure at about 46 psi line unhooked for now. it seems to run better overly rich currently + the rockers will probably want an extra lb or 2 of pressure at least in theory once they are installed i would suspect.

anyways thoughts comments and suggestions are welcome....

canadian250

4800rpm in overdrive is the fastest mine will go. Have no idea what speed that was as my speedo tops out at 145km/hr (or 90miles for you guys south of the border ) Judging by a 2000rpm at 100km/hr, I would calculate the car toped out at 240km/hr or 150 miles. Tried it years ago on the hyway by the airport where I live.

1991CamaroRslow

iTrader: (3)

Those injectors aren't right, you need to get 19's back in there or get a prom burnt for those 24's (the ACCEL injectors will have the rate written on them somewhere). I've seen a few sets of yellow top accels, all were 24's. I had another guy who put 24's in his car and the only way they could get it to run right was with super advanced timing. Check those injectors out and see what's going on with them then set the timing back at 6. If you do indeed have 24s you need to get a prom burnt or replace the injectors.

Thirdgen89GTA

iTrader: (5)

A good running LB9 without the peanut cam will hit at least 145mph.

L98's in good running order typically topped out about 150mph in 3rd gear. Might have gone slightly faster in 4th but since the 700r4 doesn't allow for WOT in 4th gear you can't give it full power.

One of the reviews shows the L98 reaching 150mph.

https://www.thirdgen.org/rt_october1...s_camaro_irocz

This is for the 1987 models. A later edition would probably do much better, though I don't see either getting past 155mph.

canadian250

What year 700r4 doesn't allow WOT in 4th? Mine has no problem running WOT in 4th.

Thirdgen89GTA

iTrader: (5)

pretty much all years, there were some cars that got a bypass, but no one has been able to find the mystical valve that allows it. The valve was supposed to be on B4C cars, but all thats been reported is that it allows for more throttle in 4th. I assume L98 players cars might have gotten that as well.

There are ways to adjust the TV cable so it allows the shift into 4th, but it causes severe wear on the trans, and sluggish shifts.

canadian250

Hmmm, interesting. I've always thought all tpi cars would shift, and run WOT into 4th like mine. Learn something everyday.

flaming-ford

iTrader: (7)

well i know some guys run 24 lb injectors onm factory 350s without much problem or so i've heard. I beleive them to be 22 lb hour so i wouldnt expect it to be a huge difference, although i would of course replace them with factory 19s had they been bad.....

at the same time i think my theory about the to much timing creating a lean like condition is pretty sound. That would also tell me why my pressure likes to be at 46-48 psi line unhooked instead of the factory 43.5. Also figure that if they are bigger injectors that in theory i'd probably want to run it at around 41 or so i'd expect to slightly compensate for the larger size.....

this is all just my thinking though could be flawed but, it sounds right in my head.

it's running tons better with the new plugs now though for sure.... revs quicker and no intermittent miss like before. Not sure why they all looked damn good when pulled except for 1 was gapped to tightly....

i have the vaccumm selector switch that i'm going to replace here in a few minutes on the back of the hvac panel, it's broken only allowing default defrost to work + it makes a small vaccumm leak because, of it so i'm sure it won't hurt. might also be a contributing factor to y mine wants higher pressure with the larger sized injectors. probably will add the roller rockers and set the timing to about 8* btdc and such in a bit but, maybe not it's snowing a little and starting to get damn cold so i may leave it at the switch lol.....

anyways i'll see if i can find anything stamped on the injectors or such leading to a conclusion of there true size and type, i'll at least take a pic of them to see if that may help any for the identification.

i'm making headway for sure, just don't have the time or place to work on it realy so everything takes 4ever to do... anyways expect a post back later tonight on how the switch helped.

ploegi

If you check with the local GM dealership, have them look up the TSB for 90-91 Caprice Cop Cars. I beleive is was something to do with tuliped exhaust valves.... In any event, they had the part number for the valve that allowed 4th gear at WOT. I have the number somewhere, If I can find it, I will post it here.

flaming-ford

iTrader: (7)

well heres a quicky update, the injectors are accel 21# injectors it's wrote right on the top lol..... can't miss it. put the new vaccuum switch on the back of the h vac..... So it's running a little rough again lol....... guess i can now probably back the fuel pressure down a couple lbs.... Pretty damn cold outside, i'm still trying to work up the strength to go out and reset my base timing and add the roller rockers but, i haven't decided i'm going to 100% yet....... maybe i'll just do 1 side for today lol j/k.........

1st one is how that vaccumm selector switch on the hvac panel should look (or maybe the fan type deal go's the opposite direction dunno it just fell apart as i pulled it out lol).

2nd pic is how it came out (in peices)

3rd shows how big that vaccumm leak would have been at least with the heater on (like it has been lately). Not realy sure how what vaccumm hoses get vaccumm on the back of that panel or anything. Basically know 0 about it, all i know is the switch was broken in half where it was glued together which would also cause whatever vaccumm supplied to it to leak out at least mildly.


and a quick pic of the other valvecovers i've had for sale on here forever but, no biters so i'll just use them + the rockers i'm going to install

freestylzz

My LB9 5 spd (back in the day) did 140+ on a stretch of open highway (240+ kph) after I had to shut it down.

And I had 2 witnesses in the car that just about sh*t their pants to back me up.

Never opened it up like that since then (although I no longer have that LB9).

1991CamaroRslow

iTrader: (3)

I would set that fuel pressure to 30 pounds idle, 35 or so on throttle. This isn't optimal but it'll get the injector rate close to what you need for that 305. Does you car have a custom prom in it? If you really need I can help you get a proper prom for those 21's.

Thirdgen89GTA

iTrader: (5)

A search of the boards reveals this info. This thread has the info you are looking for down at the bottom. First time I saw this thread too, i was researching this like mad when I was rebuilding my 700r4. Yes, I did it with the help of a friend in his garage. Did a good job too.
https://www.thirdgen.org/forums/tran...700r4+4th+gear

The advice is coming from Dana, so I assume its spot on. Probuilt is usually 100% reliable for info and transmissions.

flaming-ford

iTrader: (7)

well guys heres the latest update...... found a couple things i'm unhappy with but, for now it's just going to have to do i think......

anyways i reset base timing to 8* btdc timing.

plugs and wires are good and gapped propperly cap looks to be good and newer but, i can't get the bitch off someone stripped the bolts. I just plan to replace it 1 of these days with an aftermarket billet dizzy since they are so cheap anymore and mine has 200k on it i think.

got the 1.6 ratio rockers installed. Quite a bit of sotp improvement from rockers too.

everything is so rigged and untuned it's irritating but, i'm sure it runs about on par with most modded not tuned cars maybe i'm wrong tho????

anyways heres the worst thing i found out today... The heads that are on it are 187 casting. if memory serves me correct thats the tbi casting head, which isn't as good and uses a much different spark curve from what i've read compares to a tpi head without the swirl ramp in the chambers.

so basically heres my problem i'm all mismatched with mild bolt ons and no tuning + wrong heads....

specs:

187 head casting should be 081s i do beleive
21lb accel injector (ohm out fine at 14-15 ohms hot) should be 19s.....
180*f t stat should be 195*f
lower temp fan switch (kicks on at like 180*f or a little less i think) should be 210*f....
edelbrock headers and y pipe
borla 3 inch catback
jegs 1.6 ratio full roller rockers (should be 1.5 ratio stamped)
fuel pressure currently at 45 psi line unhooked (mind you these are 21 lb not 19s like should be in it) should be 43.5 lbs.

only thing i don't know is if theres an aftermarket prom in the car i highly doubt it but, it's possible since there is a lower thermo and fan switch. I'll get this figured out soon too.

I figure i'll play with timing and fuel pressure to hopefully find the best combination over the next week.

basically i need to get in to custom prom tuning so i can dial it in i guess unfortunately. It runs quite well just has a bit of hunting to the idle + or - 100 rpms. Seems just like a vaccumm leak but, ive looked tons of times and never found 1.

in the mean time considering my factory tpi prom, using tbi heads does any1 have a theory of whats best for base timing? I know my old l03 car was factory spec'd at 0* btdc and the new tpi is 6* so you got me here....

also would like to have a guess at what a full bolt on lb9 car should use in terms of fuel pressure taking in to consideration the injectors are 21 lb per hour not 19s as they should be.

ps. let me know if any1 has any other theorys or ideas on how i can get this guy dialed in a little better without buying all the prom burning software.... For now without the prom burning equipment i'm guessing i'm pretty damn close to my limit give or take a couple hp and mpg.

ps2 the roughness is actually missing btw to better describe it. Only does it under load it seems..... I dunno i'm pretty annoyed with it tonight seems nothings worked correctly maybe i'll get a chance to play with it tomorow depends on my work schedule.

if i do i'll try pulling 4 psi of fuel pressure then driving.
then probably pull 4* timing then drive....

if that doesn't work triple check all the plugs are tight, recheck all injector ohms with engine even hotter. Then reset valve lash if that doesn't work. If all that doesn't do it i'll run a compression test but, i know it's fine....

1991CamaroRslow

iTrader: (3)

The car will never run correctly until you get the injector issue fixed. You should drop the fuel pressure a bunch to compensate for that issue right now. I'de go down to the STOCK Tpi timing of 6 degrees btdc, you may want to drop all the way down to 4 degrees (make sure you pull the EST connector). The cooler Tstat and fan aren't going to hurt anything once you get everything dialed in, they'll actually be beneficial. Also I'de pull the distributor out and get a new cap on it, you never know whats going on under the cap until you get it off there. Hell I'de break it off with a hammer and pull the screws out with a pair of pliers if you had to. If you need a simple prom burnt I can help you out with that, I burn my own proms and would be more than happy to help out a fellow TgO member.

flaming-ford

iTrader: (7)

well yah i dropped the fuel pressure back down it's at 41 psi line unhooked 35psi hooked.

i'm just leary of running to lean and causing bigger problems myself ...... Theres a lot of bolt ons on this thing and considering what i've found so far i wouldn't be 100% surprised to see that it's got a different cam in it or a different compression ratio whatever, than it was designed for.

i may very well take you up on the offer of burning me a simple prom (would be happy to compensate you for the chip and a little time to of course).

for now i want to narrow it down a little better though.... the miss is so damned intermittent it's tough to pinpoint if it's fuel or timing and under what condition for either.

doubt it's compression as it is fairly new + sometimes the miss is completely nonexsistent.

i'll take it for a quick drive tomorow with current fuel pressure (41 line unhooked) see how it does, then i'll pull a little timing and repeat (currently 8* btdc).

i'll probably order a distributor for it this weekend so overly corroded cap and rotor + dizzy will no longer have any affect if it currently is. Also have msd super conductor wires to add to the ac delco plug ends.

i'm going to run it into work tomorow at least for a little bit and see what my genius boss thinks about it (been working on anything and everything for over 30 years), also hook it up to the snap on scanner and record some datalogging sessions.

I'll report my findings online after thats done....

i appreciate you sticking with this thread through it's epic saga btw (haven't been ignoring u far from it) lol.....

so heres my current list of to do's

1. check computer # and see if any prom modifications have been made/check to see if model is correct for engine i have.
2. drive it and reset timing/fuel pressure until i get whats optimum in terms of drivability....
3. buy billet distributor with new module pickup coil and cap n rotor. Install it
4. install msd super conductor wires
5. prey that some of this works, if not i'll check compression if it's good i'll have to figure out what to let you try playing with the prom (probably what i'll need but, not sure at this point).

1991CamaroRslow

iTrader: (3)

If you pay for the Atmel 29c256 eeprom I can burn you the chip with some setting changes for free, it'll only take a minute to do. It sounds to me like someone threw a TBI long block under the TPI setup the car had. First thing I'de do tommorow is pull some timing and see how that reacts, next I'de drop the fuel pressure a few more PSI. I used to have this CRAZY ranadom miss in my car at around 2000 rpm cruising. I FINALLY tracked it down to a worn out pickup coil in the distributor. My mechanic took the distributor and turned it laughed and said "I'm surprised this thing fires" you could barely feel resistance as the magnet jumped from tooth to tooth. 13 bucks and a bit of labor later I was all fixed. This would be a really good plan for you considering that dizzy needs to come out to get the cap off of it. Good luck man, keep us posted.

flaming-ford

iTrader: (7)

yep truly appreciate the offer. no idea where i would get that stuff at but, i'll worry about that if the changes in fuel pressure, base timing and new distributor/wires doesn't fix her up close enough.

doubt i'll do a compression test because even if it is something crazy like a blown head gasket it's not leaking any internally or externally so it'll just have to do until i swap cams and heads come warm weather lol....

anyways i appreciate the advice.

yah i wouldn't be surprised if it were the tbi engine with a tpi 305 5 speed camshaft. The differences of block designs are very nominal with compression only differing like .2 of a pnt if i remember correct but, cam specs are quite different.

i know for a fact a l03 motor runs nothing speed wise compares to this little girl. my old car ran a 17flat with a few little bolt ons on (tbi 305) this 1 will run an easy mid 14 if i can get traction and in tune a little better. I can stay right on an lt1. With the addition of these rocker arms and leaning it out maybe even a little quicker to 80 than a lt1 but, i won't hold my breath.

btw i made a new thread to all that are following this drivability problem considering it realy has little to do with the top speed of a tpi engine lol..... heres the new thread

https://www.thirdgen.org/forums/tpi/...ning-miss.html

Fast355

iTrader: (2)

Must not be a truck/van thing though. All the trucks that I have driven will make a WOT 3-4 upshift if you get them on a long enough stretch of road.

iroczcamaro87

iTrader: (1)

Yea well going down 95 with my gf i hit about 120 and it was screaming!!! maybe 5000rpms '87 maro 305 TPI Auto posi dont know the gearing...and yeah 95000 miles on her prob has something to do with it. But thats how fast i ended up goin dont remember if A/C was on but i do have two 12s dont know if those were on or not...dont know if two 12s would do anything. but yeah 120 around 5000 rpms not to sure about the rpms but for sure around 120

89mulletbird

iTrader: (4)

I'm not sure about the V8 top speed, I've had my stock 1987 5.0L 5spd over 125MPH though.

I know the TTA's will do at least 165 MPH . I was idling along one day at 110MPH and punched it down, it pulled from 110-165MPH in about 20 seconds

http://www.youtube.com/watch?v=wPnZQhqe10I

flaming-ford

iTrader: (7)

ha this is one old thread kool someone found it though, just as an update though the camaros miss is fixed (due to a bad poly lock that kept backing off) I set lash like four times on this same rocker and it never stuck.

as for the drivability its about the same i could still use a simple prom burnt for it technically but, i'm in no hurry as summer is soon to bring an msd box, underdrives, crane 2032 cam, fully siamesed tpi setup and 416 casting ported heads, after this i'll worry about tuning.

the camaro hasnt been driven much since i made this thread, since i've bought a obd1 scanner all the above parts, a mini starter and a billet distributor which i will install when warm weather hits...... i figure i will get it running good with the new starter distributor and wires and then go for 1 more track pass before modifications. then it'll be all about the tuning ........ but shouldnt be bad as im sticking with maf.

TTOP350

iTrader: (8)

For those of you that dont know the speedos in the birds stop at 145mph or so. They CANNOT go farther unless you mod them or have some real sweet voodoo majic.
The car will keep going tho.
I have a 89 formula 350. I have had it 187mph, so the nice officer told me. I know it was tickling the 200mph mark.The officer clocked me as i was slowing down. Yes it is highly modified now.
When it was stock my now brother-n-law had a 91 5sp 305 TPI formula and we would run them out the big end all the time. mine would go prolly 155-160 mph and his would run a easy 150-155. I had 3.27s and he had 3.42s.

flaming-ford

iTrader: (7)

you know i completely didnt take in to affect that i have oversize tires. anyone know whow much it would affect my speedometer output if you had 255/50 tires on the car?

305sbc

iTrader: (3)

I tested a new 86 Irocz with 2.73 rear gears, auto, and peanut cam. It topped out on flat ground at 141 mph. At the time it was running 15's @90 mph in the 1/4 mile. It came from the factory with a speed limiter for 126 mph ( because of the factory tires speed rating ) that had to be changed on the chip. I also required the upshift sleeve/valve.

About two years later with some small modifications and exhaust the car topped out at 151 mph, and was running high 13's @100 mph in the 1/4.
I haven't tested it since that point.

watman02

I know ive had mine past the 145mph mark on my camaro and it was still pulling i had to slow down due to and upcaming corner ive also had mine up to 125 with 4 people in it and at 7200ft and thats when it ran out of steam.

MTXaudioSYSTM

cant wait to see what mine will do.

have a few things todo before then but i have a

90 formula with 350 tpi / stockk with auto tranny