Finally got off my $ss and went to see how much power my car is actually making. All mods are in the sig so now on to the good stuff.

153 rwhp
230 ft/lb

The car was running way to rich. Once I get the tunning down it should be putting out a little more. I'de have to say I'm little dissapointed but with the stock heads and that *** awful peanut cam still in the motor its kinda hard to make some seriouse power.

On a side note the guy before me had a mid 80's Monte with a 454 stuffed in it and 250 shot. Really nice car. All in all................700 rwhp
Would'nt that be nice.

Atleast the riced out Civic that pulled in after me only made 120hp. I probally would have died right their in the shop if he made more than me.
Later Barrett

 

that does not sound right for the mods you have

a stock tpi 305 should run those numbers at the rear wheels

just as an example:

hotrod did some work to a 91 "TBI" 305 firebird and this is what they did
edelbrock performer intake for tbi
edelbrock air filter
edelbrock tes headers
edelbrock full cat back

and they got 185hp to the rear

thats alot more then you got and that is on a low output low conpression 305 about 8.5to1

your car is 9.5to1

there is something wronfg with your setup somewhere
i ahve all the same engine as you except i dont have 52mm tb,runners, regulater, or msd and im sure im pulling close to 200 at the rear maybe more
you lose 20% in the drive train so my motor i think is at 250 some where

 

yeah man that peanut cam is killing you, i have a '91 T/A sitting at home with that lame cam in it. as a test i ran it against my '88 TBI! formula with both cars having auto's and 2.73 the T/A barely edged out on the formula by like 3/4's of a car. i g-tech'd the T/A and got a jaw dropping 16.7 out of it.
explains why they sold so few back then doesnt it.... but the good part of it , is with few well thought parts you can really wake 'em up .
one of the quick low mod 305 i've seen was a 91 Z 305 5spd, with an SLP cam, cold air box, 3.55 gears, chip, cheap headers with the stock 2.5 pipe with just a flow master ran consistent 13.50's on radilas and 150'000 mile on the clock!
amen to that brother! :hail:

with the sponsor links you shouldnt have a problem getting your bird flying

 

Yeah I agree somethings not right but I'm not to dissapointed. I've been able to hold my own against most cars I've come across.
Once I get this rich condition under control I might be a little happier. I've been doing some research though and the consensus seems to be "get rid of the peanut cam. It sux!!".

The real question is do I even bother with the 305 or just put the money into the 355 I'm building.......

EDIT:The car also has 110,000 miles and a persistant oil leal. Maybe I should fix that first.

 

oil leak > burning oil

If you just add oil when you need it instead of paying someone to fix your leak(if you intended to pay someone), then you'll save money for that 350

 

There's no question there at all, if you catch my drift.

 

A 305 TPI should put 190RWHP (Stock) 295TQ (Stock)
Granted depending on how your car is running it is give or take some HP but you should be getting better performance than that. Especially if it's not stock.

 

:nono: factory is rated at the flywheel not at the rear wheels

his car is about right for a STOCK 305, i would say that you may be giving that 305 more air than it can use with the inatke, tb, and runners. Install a decent cam and port those heads and watch that number jump up to 50+ hp.

 

yes thats what i said
the numbers he is seeing at the rear is on par with a stock 305 tpi
but he is not stock
he sould be showing some were like 180-200 at the rear maybe more with his setup even iff he has the stock cam

 

wataru what times do you run at the track with the car

 

even with mods you might not ness' see a significant gain with a cam as useless as that , the LB9 auto cars basicially have an L03(TBI) long block with a tpi intake on it . the peanut cams were tiny... .350 int. .358 exh. with like a 179 duration. even with runners or exh or ported plenum your only going to see a very small if any return.
i cant remember what year your ride is but even a stock cam from a 5.7 vette motor would be huge compared to a peanut cam. they were like .413/.427 for certain yr. f-cars with a little more duration. if you 've got a friend at shop or dealer they can get a new one for about 180 beans that alot cheaper than 250 and up. if your 355 is a ways away and you wanna have some fun now , i quick cam swap would be worth it , i had the slp cam in my GTA and it worked great .
enjoy bro!

 

Never been to the track. The closest one is like 3 hours away. Unless I wanna drive 2 hours to a $hitty 1/8th mile. It actually has potholes on the strip!! I think TunedPort is right on, the engine is getting to much air and not enough cam to back it up. The 355 is aways off so I might slide a new one in there and see what I get.

 

With the tpi on my car I dynoed about 160rwhp and 270rwtq. I have the graphs on my page if you would like to see them. My tbi setup made simular numbers as your tpi.

 

Check my signature.. My 305 runs great.. no internal parts touched...

 

the SD 5spd cars were rated at 230hp stock so gains in the sig sound about right. if you had a manual then it 9 out 10 times had the same spec cam as an L98 (in the f-cars) you can even tell just by looking at the tachs. a friend had a 89 formuls 305TPI 5spd it was bone stock with headers and an MSD and CAI it ran like 14 flat.

i feel a cam would defintiely give your car the kick in *** your looking for

 

I had my car, 1988 T/A 305 auto, dynoed two weeks ago. The mods are slp ram air, slp air foil, slp crank pulley, slp 160 thermostat, 3" cat back exhaust, 3.08 gears.

I got 189.2hp and 274.6tq to the wheels. Engine has no mods what so ever internally. The tune-up was last done three years ago with ac-delco parts.

I have no hedders, stock tpi intake, no porting done to phlenm. Something is wrong with your. With that set-up you should be making more hp than me. I just ran a 15.2ET @ 89mph at the track this past Saturday.

P.S. I'm running rich too!

 

189 thats not to far off from a 350 rwhp numbers.... well thats a broad assumption on my part, but GMHTP dynoed a stock L98 they got 199 rwhp.

 

the peanut cam was eliminated from the 305 TPI completely in 1990. All speed density LB9s are equipped with the L98 profile.
If your T/A ran 16.7 it must have been a POS, I ran 14.9@93 with a flowmaster catback and a catco cat, nothing else.

 

With my Lb9 My best time was 15.6. I dynoed at 162Hp and i think it was 210lbs torque.

 

My car with the mods in the sig dynoned 215.7 rwhp and 297.6rwtq. I am currently installing an xr264 cam along with fully ported sr 305 heads and a fully ported intake with tpis runners.

 

well i'm happy your car runs well !!!! my 91 T/A is slow dog, it doesnt even have the big y-pipe, when the motor was rebuilt i mic'd out cam and it came out to be the same specs as a peanut cam , which would probably explain why the yellow tach warning starts at 4500, L98's start at 5000 and the tach are more incremented in the cars with the larger cams you might want to recheck you trivia friend. the only nice thing my 91 camw with was an aluminum drive shaft which i swiped for my GTA. however i do have an L98 cam to stick in the 91 soon which i hope will make my car as fast as yours
and besides we arent even talking about my hoopty or yours for that matter. we WERE SIMPLY maybe trying to point some possible obstacles our friend could be facing in obtaining the most bang for mula!!!
right?

 

quickl98, if you actually measured the cam and found it to be a peanut cam then that would be the first documented SD 305 with a peanut cam we've seen here. Shame you didn't get the PN to further veruify...

 

I had my 89 305 TPI dyno'd a few weeks ago. In terms of power mods, all I have is an exhaust and CAI. Here are the numbers... you can really notice that the TPI DIES at high RPM's!!!

RPM HP TQ

3600 158 230
3800 159 220
4000 158 207
4200 158 198
4400 162 193
4600 161 184
4800 156 171
5000 150 157
5200 140 141
5400 128 124
5600 108 101
5800 77 70


I was quite disappointed with the numbers. Everything seems to be in order in terms of tune (totally stock)

 

Omega - what kind of an exhaust do you have and what's a CAI?

Does anyone have dyno numbers for a stock 305 auto/5sp87-89?

I know my dyno numbers are right becausethe car feels and drives like it has the power and my track numbers back it up. The track I went to by the way is well...crap. ****ty launch pad and all. I'm going to a much better track on October 13th(cayuga) with the same set up. I'll post the difference in times.

One more thing...according to the dyno my peak hp and tq come around 3600 - 3800rpms.

 

where do u go to calculate ur approx. hp with ur track times? i would like to guestamate on my hp at the wheels... thanks guys
also, i thought u had to ask for the bigger cam after 90, in a 305.. it wasnt always put in.... im going by the info on this site.... somewhere it says that after 89 or 90, the l98 cam no longer always came with a 305 with a 5spd... u had to order the G92 opt. ... im not to sure... ill edit this if its wrong...

 

my 87 when it was stock except for a k&n dynoed 198 rwhp and 270 rwtq

 

87 was the first yr. for the peanut cam... as far as i know the only way you could get the larger cam was with the manual option. if you look in a chilton 8260 manual which is by NO means a absolutely exact the only yr you could get an "L98" cam was in 91 (lobe lift of .275 int. & .285 exh ) normally a 305 with out the peanut stick had a .296int & .276 exh.

mine came out to .234int &.257exh

mine after 1.5 rockers .351int & .385exh which is the same cam thats in the TBI or L03, i'm guessing that if you didnt get a manual car you got a L03 long block with a tpi induction unit bolted on it
305 "HO" cam was .403int & .414 exh
the L98 was .413int & .428 exh

think about some of the stupid and rare options some cars are built with back then! i just read an article in pontiac enthusiast about a guy here in florida who's got an '89 firebird that according to the vin is a GTA. it was ordered without ac and tunes but also came with 91 T/A aero package groundfx photos of it racing in '89 verify this. tell me thats not a little screwy!
i'm not happy my T/A came like this i was expecting it to run like GTA did when it was stock at least..... so here what i've gathered for it: 350 y-pipe and !cat!(mostlikely end up w/ headers and y-pipe) , 350 cam , 3.23 gear, looser converter.

would the # on my block give any info ?

 

OOPS!!! fat fingered there alittle on the lobe lift for the 305 in the fist part i meant .269 int... sorry



i hope you read this !

 

88redxtsy

I have a Flowmaster American Thunder setup. 3" intermediate pipe going in to a dual 3" exit muffler.

A "CAI" is a Cold Air Intake. It is just a little freebie I made using extra 3" exhaust pipe and a K&N filter.

 

quick, i am not debating you. We (meaning memebers of this site in the collective sense) have verified to our complete satisfaction that all the SD 305s (not just 5spd/G92 cars) came with the same exact cam that came in the 90-92 L98s. It's been measured in enough 305 A4s, enough have been pulled and the PN verified, and it also appears in some dealer service parts documentation as well that all TPI cars, 305 and 350 both, used the same cam. Perhaps THE most telling and universal piece of evidence is that ALL SD 305 TPIs have the exact same fuel curves in the chip. If the general was stabbing 2 different cams in 305s, they would have required different fuel curves. Period.
I was not kidding when i said you would be the first person to actually measure a cam in a SD 305 and not find the good one, you are. Unless i see a SD 305 bin with a new fuel curve though i call your example a mistake/fluke. BTW, since i always get misunderstood. I'm not calling you a liar here. Just it doesn't change what we already know.

and if it isn't obvious, i'm talking 90-92. Yes the MAF 305 non-G92s got a peanut cam.

 

my 305 had over 150,000 miles on it, had most free mods done, i had dynomax shorty headers a cheasy restrictive y-pipe stock replacement cat a flomaster, crane compucam 2030 cam (.423/.446) air foil, filters and wires cap and rotor, with 2.73 gears and pulled 191.8 rwhp and 286.3 ftlbs of torque.... ran a 15.0 on motor with 2.1 60"'s... stock block, stock heads, stock intake, stock fuel setting, stock timing... pulled real good to bout 4800 then it kept downshifting into 2nd probably could have pulled over 200 but cant say.... after they dyno run i did more stuff... stage 4 chip, played with the timing, different plugs, adj fuel pressure regulator, ported the upper plenum, and a cut out ....... i know i was pushing atleast 215-220 at the rear.... used to walk the **** out of an LT1 until 3rd gear.... wouldnt ever go into 3rd damn tranny's....... then put a 125 dry shot on it and easly had 300........left quite a few LS1's

 

on a 110,000 mile 1990 LB9
I ran a 14.66 @ 94.9 MPH with a 2.26 60 ft.
Mods are: ported plenum, TB mounted air filter, hedman full lengths, and dual 2.5" exhaust into hooker aerochambers.
exhaust made a HUGE difference.

was able to keep up with a SS LT1 from a roll.

The first time I went to the track the car was totally stock and I ran 15.4 @ 89 MPH. Had a burnt clutch and crappy driver .

 

so if i were to put that stock L98cam in my '91 T/A then i wouldnt need to play with chips or anything. why would they put the small y-pipe and intermediate pipe on a TPI car. it doesnt make sense? my 87GTA came with all good OEM stuff back in '87... and was a 305 car and probably a peanut deal at that
none the less , since the car in the original post is an '89 formula would it be a good guess to say that it has the infamous peanut cam in it, making it alot harder to see full potential

 

When did you dyno it ? What was your peak numbers ? What is your final drive are you auto or stick ?

thx,
RP.

 

my 91 305 tpi would run mid 14's all day long - until it blew up - damn shop put a PEANUT CAM in the motor - really pissed the comp off

anyway i saved for a new cam got it in and everything - my best friend then busts off the harmonic balancer puller off inside my crank somehow - THE ONE THING I LET HIM DO!

anyway that was a year ago adn the cars still in the drive way

though i now have an 89 grand am with 200 hp 200 trq until i get the z28 fixed

but yeah the peanut cam seriously made the car a 16 second car...

 

has anyone here used the LT1 cam in there 305 TPI, or does anyone have any info on the LT1 cam in these engines. I hear they work well but I havnt heard from someone who has done it.

Thanks.

 

only thing you have to do is push that little tab on the front of the cam in alittle to make it fit an earlier motor

just when to tak out your cam compare it to the lt1 and tap in the tab to the same langth as your original cam

 

Ok sounds good. Has anyone here done the LT1 cam mod. What kinda results did u get.

Thanks

 

I talked to a guy on the message boards that has done the LT1 cam mod and he said that it worked real well. I also talked to another guy that said its not worth it for the time and difficulty it takes to install.

I dunno...anyone else have more info.

 

Yeah those runners are too much for the engine. Take 'em off and send em to me

 

dyno #'s in sig.

 

Ok I have to ask, maybe I haven't looked in the right threads, or I'm just not up to date or something, but what do you mean "Peanut Cam"? I've seen it posted a few times and now I'm curious I have the 305 LB9 Auto in my 88 GTA, does this mean I have a bad cam?

Thanks in advance
Mark

 

well it's not bad but it's not good eather

 

Its a California emissions cam. All 87-89 305 tpi auto cars got it, including yours. Dont expect to make much power with this cam its just not possible. I think the lift is somewhere in .3xx territory, which is just horrible. So small its now infamaously refered to as "peanut". But hey dont worry its good for gas mileage.