I would definately get rid of that section and connect the y straight to some 4''. We went to a local track Friday and I squeezed out a 10.40 at 123mph. It was spinning pretty bad down the hole track. One pass a actually decided to flip the second stage on and it almost put me in the wall around the 300ft mark. I couldn't figure out where the extra 7+ Mph went either... Next time out should be fun...Originally Posted by Blown06
Thanks, Now I need to find the missing mph.
I'm wondering if the 2' section of the stock 2-7/8" exhaust pipe is holding me back? I got under there and looked (its been a while since I really paid attention to the exhaust). My Pacesetter Y-pipe actually flanges up to the stock exhaust for about 2' before it goes into the 3" to 4" expander, then into the 4" muffler.
Damn, what do think exhaust velocity is in that tube at 7000 rpm and an impossible amount of boost for a D1?
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