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MikeMoller · 05-12-2015, 10:00 PM

Well, modified some old MR Gasket headers 1 5/8. Extended the primaries 5 inches and attached OBX Merge collectors, throat 2 1/2 going out to 3 inches, collector length 8 inches from throat to end . SLOWED the car almost 3 tenths and 1.5 mph in the 1/8th. Went from 68 jets to 72 jets (as most said they had to richen with the merge collector) and had no change. Put the old headers back on and went right back to 9.40. Thought sure the headers would pick it up.

Thanks for the encouragement Ed!

05-12-2015, 10:00 PM	#49
MikeMoller Senior Member Join Date: May 2010 Location: Raleigh NC Posts: 637 Likes: 27 Liked 254 Times in 78 Posts	Re: 75 Nova U/SA Well, modified some old MR Gasket headers 1 5/8. Extended the primaries 5 inches and attached OBX Merge collectors, throat 2 1/2 going out to 3 inches, collector length 8 inches from throat to end . SLOWED the car almost 3 tenths and 1.5 mph in the 1/8th. Went from 68 jets to 72 jets (as most said they had to richen with the merge collector) and had no change. Put the old headers back on and went right back to 9.40. Thought sure the headers would pick it up. Thanks for the encouragement Ed! __________________ Mike Moller NHRA 203 Q-R-T/SA Last edited by MikeMoller; 05-12-2015 at 10:06 PM.