GMan 3MT

iTrader: (4)

Who has what? I'm trying to gather a list of HP/TQ numbers for stock or at least mostly stock 305 TPI motors. Here's a few that I know of.

'92 RS 180K all stock 213hp/278tq 9.52@74.9 in the 1/8
'92 RS 140K all stock 207hp/???tq 13.9@100 in the 1/4
'92 RS 176K all stock 217hp/298tq ???@??? (motor rebuilt in 97 tho so the 176K is not right)

*edited to add more numbers

1989GTATransAm

iTrader: (3)

I think someone is pulling you chain on the second set of numbers.

KiLLJ0Y

iTrader: (1)

GMan 3MT

iTrader: (4)

I just got that info from this website so the acuracy is unknown to me. But I do know most of the guys that have owned that car. I'm assuming you think the 1/4 mile numbers are wrong? I'm not a drag racer and don't know what is accurate for a 305 TPI.

Killjoy... sorry for wasting your time.

1989GTATransAm

iTrader: (3)

Right the 1/4 mile numbers for the stated horsepower.

91GTABird

Camaro RS with 305 TPI?

KiLLJ0Y

iTrader: (1)

and dont let it happen again..

GOY

B4C = cop package = tuned port cars.

In 92, it was an option to anyone, but made the RS more expensive than a Z28.

BigWhiteGTP

187whp & 267wtq from my stock '91 auto T/A.

EjBaL

just dynoed a stock 85 tpi camaro and it did 167hp and 211tq at the wheels, which is a little less then I expected but everyone there thought that was pretty good for a 305. I dont know how you get numbers that high from a stock 305, unless its really really low miles or something. Wait a sec, it doesnt seem possible for you to get that amount of torque at the wheels of a 305....

firebirdjones

A friend of mine has an 87 Trans Am with 305 tuned port and automatic. It is very nice with low miles, he has only done a few simple things to the car. It has an SLP chip, a 3 inch cat back exhaust kit, can't remember the brand, K&N Filter, and thats it, still has stock exhaust manifolds etc... and he put down 199 horsepower to the wheels with a nice looking A/F ratio, I can't remember the torque numbers unfortunately but decent numbers for a 305 that is close to stock. Larry.

BigWhiteGTP

And 211wtq is lower than a TBI car. GM has been underrating Fbodies for quite some time I think.

EjBaL

then why didnt i get better numbers out of a stock strong running 305?

firebirdjones

Well, every dyno is different, the one we were using was outside and the ambient temp was near 90 etc... that hurts performance also. Using one in an A/C environment may help the numbers a little. In my opinion I would not worry too much about who makes what on the dyno, bottom line is which one is quicker at the track and can all that power be used successfully. Just the way I feel about it, I can give some perfect examples of what I am talking about. Larry.

BigWhiteGTP

Mine was done outside on a Dyno-jet around March-early April. And most cars were getting low numbers that day if my memory serves me right. My car feels stronger than it did since I went to 87 octane. But yeah, maybe you read the dyno sheet wrong or maybe your dyno was a mustang dyno....which is a conservative dyno actually.

BT283

iTrader: (3)

i have been lookin for a 91-92 z with a 350tpi and i cant find one in good condition close by. But i found a 305tpi in awesome condition for a desent price, and i was wondering what is a typical 8th mile number this car can lay down.

3leggedog

Just did a 88. 105k headers,high flow cat, slp runners, fuel at 50 psi,6al msd,msd wires,msd coil,plat4 plugs,ported plenm. Stock bottom & top,block never opend. 178rwhp/195tq @5130 rpm On a 5 speed. Not done with this one yet!

EjBaL

not thats wierd because you were slightly ahead of me with hp, but I beat you with torque, and this a 100% stock 305 with k&n's and a flowmaster.

BigWhiteGTP

No offense but those numbers are horrible. For one, crank torque on our Lb9 cars is 300lbs, minus 15-20% (depending on trans) you should put down 240-255tq to the wheels. And second, even w/o mods, because of your 5spd, you should have just as much and probably more power than my car. Which you don't.

Unless you read the dyno wrong, or you live on Mt. Everest with Alabama summer humidity, your car is sick and tired.

3leggedog

yes bad numbers. Since found two small vacume leaks, The tq is compleatly differant with the new runners. I will get it fixed soon. It still is a strong driver. Was't the lb9 220hp at the motor? so minus 15 % or so for rwhp. It's not that far off for stock?

bnoon

Your HP reads fine for stock if it was a 225 horse car vs. a 195 horse car, but the torque is waaaaaay low at only 195. Is that peak torque rating, or did you just happen to read the torque number at the peak HP RPM? That could explain something...

BigWhiteGTP

No your numbers aren't far from stock, but you had those mods ( headers, cat, runners, etc...) on those dyno runs correct? I "think" you should be around 200whp at least with those mods.

Now did you tune for the fuel pressure to be at 50psi? Seems to me the stock 46psi is good enough, 50 may be overkill. I could be wrong though, just a thought. Runners could be overkill as well. Do you know what your timing is set at?

I believe the 5spd TPI cars were 215hp at the motor and 225 later on with the dual cats and Speed Density systems. So factor in the 15% DT loss that's roughly 30hp less.

3leggedog

the tq # is at 3900rpm. I am happy with the intrest! But it's not my listing, or thread. I also forgot that i did the MAF , screen and heat sinks. I am getting new design 2 svo 19# injectors. This well give me another shot at vac leaks! Also the bolt on mods - I was hopeing to get back to new stock #. They say 10hp for this 15 for that/ Idon't belive. It's a totale package thing. Not a best day test. But Iam still buying!!! Oh yea turns out slp runnres have no performance add on a 305. check the super rod article on top of the tpi listings???? Not to worry I'll make this car better!!$$

CHEVY_EATER

I know the later 305's have to be close to a stock 302 dyno. They make around 185-190 rwhp and 260-270 rwtq. My friends 88 GT was at 227rwhp and 284rwtq with full exhaust, cold air and pulleys. I know that I have seen stock dyno #'s for L98's that were around 200-205 rwhp..not sure on the torque...

91RS5speed

I got some graphs of mine as I changed things. Goes from a 305 tbi to tpi with headers. Still has the tbi cam and heads so numbers will be alittle different.

http://bitchincamaro.no-ip.com/dyno.html

Zepher

iTrader: (1)

My friends stock 91 Z28 put down 165rwhp, don't recall the tq #.

87TPI350KID

If your stock 305 is putting down 180 hp and 255 rwhp, get rid of it.