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-   -   Headers for 85 Camaro (https://classracer.com/classforum/showthread.php?t=52251)

Greg Hill 03-20-2014 07:24 AM
Re: Headers for 85 Camaro
 
Quote:
Originally Posted by tomcraig (Post 424730)
Building a 85 Camaro for IHRA crate motor stock. Fast burn 385hp. version. Looking for 1 5/8 headers. Whats the best choice? Not a lot options. A little help please.
I think 1 5/8 straight tube header is too small for that motor. Maybe a two step 1 3/4 to 1 7/8 with a 3" collector.

Adger Smith 03-20-2014 09:31 AM
Re: Headers for 85 Camaro
 
Greg,
My testing says you are right. The 385's I've done respond to the 2 step. If you are running a P/G combination the 15/8 might help by rocking the Tq curve down a little. Always lost MPH and high #'s on the dyno with them. A collector change to a "Too big" helped, but not enough. didn't respond to a merge. the big 2 step did show something with the right merge on the track.


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