2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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Old 11-19-03, 12:39 AM
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newbie help

hello.....im not that deep into the mech. side of cars.

heres my situation:

1991 GXL stock everything.
im planning on headers, bonez high-flo cat, borla system, k&N air intake, maybe pulleys.

how (if ever) will this affect gas milage?

and will this get me to 200hp? if not, can someone give me an estimate?
Old 11-19-03, 12:42 AM
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these mods should not drastically affect your gas millage.
However assumming that you car is running 100%, I would not expect to see 200whp without having your engine street ported, which unfourtunately requires a rebuild.
Old 11-19-03, 01:27 AM
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200 what at the fly? ahaha No way dude... you need mor ethan just simple mods get ready to start PORTING the TB and the engine maybe even get a ported manifold..
Old 11-19-03, 05:46 AM
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Originally posted by jreynish
these mods should not drastically affect your gas millage.
However assumming that you car is running 100%, I would not expect to see 200whp without having your engine street ported, which unfourtunately requires a rebuild.
Then my car has to be street ported.
Old 11-19-03, 08:45 AM
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port for horse. those mods might get you 200 at fly though.
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