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Topic: tbi cross fire

in Forum: C4 Engines

Re: tbi cross fire

Posted: 9/13/15 10:12pm Message 11 of 12
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Mission Viejo, CA - USA
Joined: 3/18/2015
Posts: 74
Vette(s): Yellow '84 Coupe
jonneyone said:  Most guy's and gal's think it's the manifold that is the problem.   Not true.  These tbi's are way too small and the iac motors are too small too.   This is why the cross fire doesn't have any hp.   You can send them out and have some boring to them among other mods.  You'll see a big boost in the hp.

Have you done this mod?   Unless you can post some "before" and "after" test results, this comment goes right into the "bad rumor" round file.


I've read a lot of stuff lately about the crossfire.  A lot of it is bull crap.

You've got that one right!





|UPDATED|9/13/2015 10:12:26 PM (AZT)|/UPDATED|



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Re: tbi cross fire

Posted: 9/18/16 10:21am Message 12 of 12
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homosassa, FL - USA
Joined: 9/18/2016
Posts: 1
Vette(s): 1984 z51
The X fires get a bad rep that is partly bs. With some minor port matching of the intake a lot can be gained. My 84 has been decated with true duel exhaust and targa mufflers, a 1985 fuel pump. With the automatic trans it will smoke the tires in first and chirp them hard after it shifts to second.It is not a drag racer and does lose power on the top end but it still leaves most of the kids in their Jap tuners in it rear view mirror.


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