Ummmmm.... why? The old engine is in a thousand pieces and the main bearings were all shot. And I don't really care WHY it would quit at 4000 RPM. And at the dyno the new mill ran great.
Might want to check you idle vacuum when cold or warmed up enough to get decient vacuum and then after a bonzai run. Could have a leak developing as the expansion rates between the aluminum and steel come into play. as the engine temp comes up and stabilizes at running temp. Cracked manifold, cracked vacuum fittings, vacuum lines etc. Thing I find interesting is the lazy shift, but then again, if you are not shifting on the governor and now are using the modulator, maybe it is another indicator to check running vacuum under a load, both hot and cold. JAHO Mike
Mike, Yardley has a new engine, thus the recent update by him. The problems were with the old build. Devon
Yippie yi yo kayah! :beers2: Sounds like you will be ready to rock ands roll this season!!! :TU: - Bill
