what to expect.

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08-20-2007, 10:44 AM

ajk511

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Car: 1991 z28

Engine: L98

Transmission: 700r4

what to expect.

well I just dropped off my throttle body, plenum, runners, base, and heads. getting porting and gasket matching to the intake stuff and port matching the intake ports on the heads to the manifold. Also getting the exhaust ports on teh heads polished to help get the exhaust gas out faster, and getting 2 inch valves and 1.6rr. combined with a set of headmen long tubes what do you guys think I should expect as far as performance gains and drivabilityl issues? do you think I will NEED a re-tune or is this set up within the capabilities of my stock computer. BTW I have a 1991 l98 speed density. Thanx guys.

Last edited by ajk511; 08-20-2007 at 10:48 AM.

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08-20-2007, 11:44 AM

1989GTATransAm

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Car: 1989 GTA

Engine: 369 TPI

Transmission: 4L60E

Axle/Gears: 3.70 Nine Bolt

Re: what to expect.

What throttle body, runners, base and heads?

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08-20-2007, 11:49 AM

ajk511

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Join Date: Oct 2006

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Car: 1991 z28

Engine: L98

Transmission: 700r4

Re: what to expect.

all stock. sorry, forgot to mention that.

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08-20-2007, 11:16 PM

1989GTATransAm

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Car: 1989 GTA

Engine: 369 TPI

Transmission: 4L60E

Axle/Gears: 3.70 Nine Bolt

Re: what to expect.

Very hard to say how much power you will gain. It will be totally dependent on how much the alignments were off to begin with. You will pick up some just hard to say.

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