Thermoquad race tune

rumblefish360 said

Not to fan the embers of a dead fire, but, let me get this straight, David built you a carb from miles and miles away and it ran well? From just talking about the build? And your complaining on a tenth gain when you did your TQ on your engine present and in front of you and not how many miles away???

A tenth?!?!

The one thing that the TQ drives me crazy on is the rear air door and what you have experienced. The A/F changes but the slip does not. You must be running at peak and restricted heavy.

Click to expand...

Dave built me the carb that was supposed to be the best of the best, all the tricks. After replacing the accelerator pump and spring, I ran the carb. I tuned the carb in to a good a/f, which was one metering rod and jet change. I then built the same number carb, using all the parts from Dave's (Metering rods, jets, needle/seat, pump squirter) All I did was massage the airways alittle. Mind you my first ever rebuild of a thermoquad, that carb picked up a tenth and 1 mph. So the same tune, my homebuilt thermo beat the best of the best. In a heads up class, 1 tenth is to die for. Maybe Dave could have found the tenth, don't know, but I was pretty disappointed.

Now hopefully that is over with...

Has anyone else experienced tuning with the air door that actually results in e.t. change? I understand if you weren't close on it, you will pick up. But the minute changes that affect a/f, does your car actually respond to it?