Headers for 85 Camaro - Page 2

Greg Hill · 03-20-2014, 07:24 AM

Quote:

Originally Posted by tomcraig

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

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.

03-20-2014, 09:31 AM	#12
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	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. __________________ Adger Smith (Former SS)