What's the most horsepower y'all would trust a totally stock TPI setup to? I mean everything from base manifold to computer.

Kenny

 

Depends... Naturally Aspirated or not? Running boost kinda does away w/ the airflow limitations TPI presents...

As for a bone stock, N/A TPI, I don't don't have an exact number, but I think whatever it is, would suprise alot of people.

Although my base is home ported, my runners and Throttle body are stock, and my time is in my sig..

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Webmaster:SETHIRDGEN
GM Tech
ASE Master Auto Technician + L1
1987 Trans Am: 357ci
Ported TFS heads, ZZ4 cam, headers & exhuast and other go fast goodies
13.53 @ 103.77

 

Hey Kenny, you're local to me! Welcome to the group. Check out the local club at http://www.sc3g.org/ if you havent already.

I made 282 HP and 380 TQ to the rear wheels with a ported stock TPI intake, L98 heads, a ZZ4 cam, and SLP 1 5/8" headers. It ran a best of 13.23 @ 107.18 MPH. With some clever porting known as the siamese-job, you can make a stock TPI intake perform very well. I wish I would have done it before I put my current engine together, who knows how much power it would have.



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1991 Camaro Z28
350 L98 w/ T56 (originally 305 LB9 w/ T5)
318 RWHP, 419 RWTQ
12.803 @ 108.50 MPH (1.932 60')
Member: SoCal F-Bodies
ThirdGen 4-Life!

 

The stock TPI setup is pretty limited. The whole system is restrictive to begin with, and I am almost possitive that the stock computer cannot take more than 218 duration without going crazy. Pretty much if you go with a big cam you are going to have to upgrade the chip, along with the manifold, runners, etc. The list is endless-I have learned this the hard way. It really depends on the cam that you go with......I am still learning on this, so I can't give you all the details just yet.............

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92 Z-28
305TPI-5speed
3.42gears
B&M RIPPER
K&N AIR FILTERS
Hypertech Fan Switch
160 THERMO.
14.7@96MPH(stock run)

 

Thanks for the replies. The motor is an all-forged 383 with DartII Sportsman heads which have been extremely ported. The motor is eventually going to be turbocharged and I expect 600+ hp to be my eventual goal. However, that is with the right cam and what not. Currently it has a '97 silverado cam to keep things on the down low. I have a TPI setup lying around and wanted to utilize it, but I feel it just won't be adequate. For now I'm just going to run the motor naturally aspirated with a Performer RPM and a carter carb and upgrade from there. SEFI is likely down the road. BTW, its goin in a first gen. Thanks for the info.

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KeNnY

• '68 RS in the works, Ritchie Racing Red
• '99 Z28 (dad's car) white
• '92 Sierra also white

Boost: The replacement for displacement

 

Well since you seem to have time to do it, it might be worth a try. The TPI setup excells at low end torque and can be very effective up high with a good port job (siamese it!) Since you have that silverado cam it might worth your while as I'm sure you're making plenty of power down low .

 

Oh ok, I thought you had a thirdgen since you were asking about TPI setups. Check out the local all-gen f-body club at http://www.socal-fbodies.org/ We've got some very nice first gens in the group as well.