Originally Posted by
Chickentrader
That's exactly what I would have thought about the exhaust cooler; but it would have put us across the line at Bayside on Sunday, and it is cutting it too fine. No mods, JPI exhaust & manifold (don't know which number), O.S.TZ, O.S.P7 plug (perhaps too cold?) No head shims. Perhaps we could still lean the top end a bit more, its not getting too hot.
Would an O.S. tuned pipe, or a hotter plug help you think? We usually run a Jammin Hyper EFRA 2645 exhaust; as it seems to make the engines run faster, but we're having the same fuel economy problems with that exhaust. We're planning to be at Brendale on Sunday, will you be there?
Kindest regards,
Lars.
nova or Max 2601 or 2604 with med conical manifold should help. i have used 2652 nova pipe, and i dont get much more power but it uses more fuel. i really think these 2640+ pipes are really aimed for use with Ins Boxes.
added head shim can add more top end revvs, that with leaner mixture, a long straight could see other problems. OS TZ unmodded shold make run time easy, try different pipe and manifold, i have gained 20secs plus just from going back to the 2601.
