Steve Adleman

tried to run my 1979 bone stock 12a to redline on the advice of a few rotary owners here and on the outside. problems arise when I get to about 5500-6000 and go wide open throttle, it bogs and backfires and just doesn't sound good. if I gradually press the gas it does better, but wondering what the problem could be with WOT? timing is correct, float levels are a little off, but close. runs great otherwise. thinking about swapping carbs with another one I have ready. any other ideas?

KansasCityREPU

iTrader: (9)

Backfiring can be caused by a exhaust leak letting in extra air.

t_g_farrell

iTrader: (1)

Your secondary circuits are probably not working correctly. By slowly pressing the gas, the vacuum secondaries are not opening and you are running the primaries only. I would check for vacuum leaks first and foremost. Swapping a different carb will just make it harder to diagnose.

Steve Adleman

Ok, that makes sense, but the secondaries seem to kick in fine at lower rpm's, and last I checked the vacuum system was tight w new hoses. I did get it to redline yesterday without any hiccups by using a lighter foot. and I was planning on swapping carbs anyway at some point because the other carb is original to the car and needs to be tested after rebuilding it