seiplentz

iTrader: (2)

Well just had my car on a dyno for the first time and it was a lot worse then I thought it was going to be. I thought my HP was going to be in the mid 2s being that I have a 350 with some mild upgrades.

183 HP and 260 ft lbs.

SSJBaku

im also getting ready for the dyno here in a few months, i have never had my 305 tpi dyno'd and figured it would be time at the local dyno day, after seeing this, might drive the other car and leave her home

dairy

I would still take yours. I would want to know what its putting out. I have a 305 tbi and it dynoed 150hp and 250tq. it only had a air filter and exhaust at the time.

SSJBaku

yeah i still may, will be different numbers for sure, got used to the numbers from the other car, so might make me want to throw more money at my camaro

mr305

iTrader: (1)

those are some pretty low number..
is everything working correctly? did the trans feel like it was slipping?
my ultimate TBI mods 305 put down 225 whp

red rock

iTrader: (2)

Remember, you loose about 20% through the drive train, so that would put you a little over 220 hp at the crank. I see you have an '85, so the 350 was added to your camaro? How good of a tune do you have?

seiplentz

iTrader: (2)

I think the tune is a big part of it. I am still running the 870 ecm and some prom I got that ran better then the stock one not even sure where it came from.

The 350 was added along with a mild street cam and 24lb blue top injectors. The trans has a 2500 stall converter and a nasty shift kit.

The car runs like a beast chirps hard into 2nd. It doesn't feel like 183HP

red rock

iTrader: (2)

You need a custom tune bad. Call Brian http://tbichips.com/ With a mild cam and 24lb injectors, You need a tune for what you have.

seiplentz

iTrader: (2)

Here is the sheet

red rock

iTrader: (2)

Wow, that peaks early and drops off fast.

mr305

iTrader: (1)

What do you have for exhaust?
I definately recommend tbichips for mail order tune they got mine pretty dead on im sure a tune would help ALOT!

seiplentz

iTrader: (2)

I thought that as well. I almost think the guy driving it didnt stay in it. I only told him that I had a rev limit set at 5600 by the msd.

As far as exhaust I have Flowtech shortys into a flowtech y pipe hollow cat and flowmaster cat back I think its 3".

This pretty much sealed the deal for me on a tune or ecm swap. I am on the fence with getting megasquirt or a ebl flash both are very close in price.

built91Z28

Yea, something isn't right. For both to peak at 3600 rpm and H.P. dropping off like that by 4300 rpm. I wouldn't worry too much about the numbers from this pull. Get it tuned properly and then dyno it again.

My car is carbed, but the lessoned learned is the same. When I first got my motor running, it wouldnt even chirp the tires. Now, just through tuning, I can spin them up to 70 and maybe past, and it runs 112 in the quarter. Tuning can make all the difference in the world.

paul_huryk

It seems to me like you have a tuning problem (fuel and timing) and possibly a restriction somewhere giving a quick dropoff...

Jim85IROC

iTrader: (2)

The stock 85 PROM is awful on a TPI350 with larger injectors. Without knowing what PROM you have, it's hard to say, but it's probably nearly as bad.

As an example, when I put my TPI 350 with 24lb injectors into my 85, and reused the original PROM, I ran a best 1/4 mile time of 16.1. That's worse than a stock TPI 305 ran in 85. Since swapping to a 165 ECM with a custom tune, swapping to a T5 (whose performance benefit is negligible), and adding a couple small bolt-ons (runners, accel base, etc), I've gotten the same car with the same motor to run as fast as 13.6 in the 1/4. So yes, the tune is vitally important.