grngryoutmyway

iTrader: (1)

Last night I was comin home riding up 400 at like 4 in the morning... needless to say the highway was empty and theres no cops around so ... I gunned it. Theres usually a govoner at 115, but my speedo is broken so..no govoner for me if I remember correctly at 115 my car was running about 2500 rpm's or so.. but its been awhile since its worked, or I drove that fast. I got it all the way up the orange section at 4500 rpm and backed off.. and then proceeded to do that a few more times so how fast were we goin? it felt like about 130-140 or so

steven90GTA

I would say about 140

TraviZ

iTrader: (2)

what the hell?

my tbi cant get much faster after about 3k

steven90GTA

My CrossFire TBI I think I figured I got it up to 138mph with 3.42 at I think it was 3500-3800rpm

DuffMan

iTrader: (1)

Got my '91 up to 137, and that was with 3.08 open diff i beleive

ShiftyCapone

iTrader: (7)

Judging by your sig I will say you have a post 89 TBI car. Therefore you have a limter at 112 to 115 depending on tire size. Unless you have dissabled the VSS or re-set the limiter in the chip you did not go any faster. These cars cannot go 140 in stock trim.

Dante93GTZ

iTrader: (5)

Whoa whoa whoa... wait a sec. Your speedo is electronically controlled, therefore a few things could be wrong. Just because the needle doesn't work (wiring short, terminals not touching, circuit damaged in cluster, etc), doesn't mean that your car doesn't know how fast its going. The VSS system 9/10 is still working so I doubt you were going 130-140. I've noticed that 110-140 on the highway feels about the same.

Jst my $.02.

ThirdGenFire

My 88 Firebird toped out at 120mph.

grngryoutmyway

iTrader: (1)

It didn't let off, when the speedo was working and I got up to 115 it would cut off gas to the engine and wouldn't go anywhere near redlining and the car would immediately slow down very quickly. Now just mash the gas and it goes as fast as you'll let it... I would assume that if the govoner was working it would act like it did before and the RPM's wouldn't be able to get any higher than it did before without it acting the same way and slowing down? BTW its a 92 with 2.72 gears.. not very many mods at all K&N, better plugs and wires and flowmaster exhaust

FLYNLOW92rs

iTrader: (53)

TBI cars are equipped with the limiter, that limiter is controlling the VSS, so if it's disabled your car is not shifting properly(Auto)

140mph in a TBI equipped car, not in the stock form...



This is where my speedo stopped, but then again, my car isn't a TBI, This was a 145mph run....I know this because 4th Gear redlines at 137mph on my car and i shifted past this point and continued to accelerate then let off, but the speedo can stop at some point....

Sgt.D's92RS

All 305 are capable of 200+mph-------------when dropped from a plane

25THRSS

You hit about 125ish given a slight bit of converter slip.

grngryoutmyway

iTrader: (1)

It seems to be shifting properly. I was actually kinda trying this to determine wheither or not the VSS was still working while the speedo wasn't. It's definately on my list of things to fix but the lists seems to be constantly growing and well.. my funds arent exactly growing at all.. I'm really curious as to what the problem really is now.

tamatt27

My 305 TBI 2.73 no posi T/A got to 120 and it was way past 2500 RPM.

bigREd car

it is possible in a 305 tbi.. just make take you forever to get there.. he never said he did it with break your neck speeds..

i have got my 305 tbi up to and around 135-140. My speedo was also broken but i was following another 5 speed camaro with a crate motor and carb and my friend was behind us with his sentra SER both verified 130+ speeds one higher then the other so i say its some where between each other... NO i was not drafting the other camaro we had a fair distance between us but speeds were matched.

i would not recomend doing 100+ in a camaro RS the engines arent really built for the abuse. I am still repairing my mistakes from my top speeds runs from 2 yrs ago.
in fact in that top speed run i got cut off by a vehicle going 60-70 and spun out.. the freeway looks very empty when everything is flying by at 130+ never again.

and i had 2.73's i was pulling an outrageous rpm too i could barely keep the car from wanting to downshift the pedal was almost to the floor and we know how auto's like to downshift out of overdrive.

just my 2 cents to each his own

shawn

phoenix305

does any one know how to disable the speed limiter on a lg4 or any of our motors for that fact??????

Camaro68Vette63

My old 91 Firebird LO3 went 115-118 than the govener hit with 2.73's and I 92 LB9 auto can do top speed?

trans_am_ta_84

your oil pressure is pretty damn low. mine stays over 60 when you're on the gas and then when an idle it stays just a bit over 30

TraviZ

iTrader: (2)

mine stays at 60 only when i start it in the morning, otherwise its a steady 35 no matter what.

trans_am_ta_84

dang.

i've had 2 trans ams and the 84 305 carb motor would stay just under 60 while driving and just under 30 idleing.. and now i just rebuilt this 355 tbi and it stays over 60 on gas adn over 30 on idle.

TraviZ

iTrader: (2)

would my low pressure be related to blue smoke when i start the car int he morning?

trans_am_ta_84

most likely smoke on start up is your valve seals. mine used to until i rebuilt my motor and put different valve seals in.

1991tealRSt-topGuy

you guys trust those stock gauges

camaro05

iTrader: (1)

you should be in 3rd gear if the pedal is to the floor. There is a sensor or something that makes the car down shift if you go past half throtle.

bigREd car

that is why i said hard to keep the car from downshifting...

for future reference read the entire post before you quote...

Shawn

ssxmac

iTrader: (1)

i believe its 3/4 throttle. Thats what my B&M instructions said when i was putting my kit in.

Use the 'calculations' link off of the main page to see how fast you were going. Verefy that your tach is correct first though.

There is something wrong w/ my speedo too. It looks like it 'floats' or 'bounces' not sure how else to explain it. Anyone else have that problem?

-chuck

Camaro68Vette63

My old buick T-type's speedo would bounce up and down 5 mph however fast i was goin it was anoying as hell. Could never figure out why, tightend all the speedo wires and greased em.

bigREd car

3/4 throttle... close enough.. i remeber my run if i moved the pedal at all it would downshift.

FLYNLOW92rs

iTrader: (53)

OVER 60 when you are on the gas?....

If it makes a difference my engine is an LS1, not a thirdgen motor.....I never get above the middle mark between the 30 and 60, even when pressing the gas

Camin89Camaro

Mine stays around 30 but as soon as I get over 1500-2000rpms its gone past 60 actully its as far as it can go after its warmed up its not as bad maybe 3000rpms and its pined out lol

WS6Ray

I'm new just joined today. My needle does go past 60 psi when I'm on it. It only goes to 30-35 when idling, usually on a hot day.
I was on the 15 Fwy going north from San Diego and my needle went way past 120, pointing toward passenger seat downward and I was still in third approaching 5000+ rpm.

junkyarddog

it's ok to have about 10psi per 1000rpms with a minimun of about 25-30

all motors run differently, but you'll know when the oil pressure is too low!

most cars won't last too long at excessive speeds, on a continuing basis.

Just open it up now and then, but don't sustain high speeds, these cars are definitly not made to deal with 100+ travel.

Keep in mind, the engine may be able to pull to 140mph, but can your tires/brakes/suspension handle the demands of those speeds? More than likely not. Just keep in mind, if anything were to happen, it would be ugly!

Blue smoke?

Just thought I'd add this here. I don't normally use this stuff, but I just used a quart of Lucas and 10-40w Castrol Synthetic oil in a 24 valve Mitsubishi engine.....previously had 10-40w conventional.

This car had a bad smoking problem, definitly needs valve seals!
Now there is NO smoke, I'm not even kidding. It took a few minutes for that gunk to work it's way in and then the only smoke was the residue burning off the tail pipes. I took it for a ride, opened it up a couple times and there really is no smoke! I sure did get my $8 worth out of that qt. of maple syrup!

The oil pressure also increased a few 'marks' too, very silent as well!