Hi All,
1941 Chevy 2 door sedan.
Recently built 1961, 261 .30 over, "RV2" cam, dual Weber 32/34 (Langdon setup) on Fenton intake, Fenton headers to 2" dual exhaust (through "Smithys", love the sound). T5, Nova rear end (2:73).
The engine really runs well. It's a dog out of the hole but I don't have high expectations for an inline 6 with a 2:73 rear end. I'm doing the dyno thing just to make sure I did everything well, and there isn't anything major I missed.
Took it to a local guy I know who has a repair shop and tuning shop. He does a lot of tuning work both fuel injection/computer and carb/no computer.
First run was miserable, so the first thing he checked was my throttle cable. Sure enough, with the pedal floored, it wasn't even opening the secondaries. Sheshh.... so much for trying so set that up by myself.
Second run we opened the secondaries (by hand...) and the numbers got better. At the rear wheels, 135hp @ 4000 rpm. The HP was still climbing be he wanted to stop at 4000. Torque peaked at 195 @ 2700 rpm.
At that point he wanted to stop. Looking at the AFR (air/fuel ratio i'm guessing), my numbers are higher than he wants.
We did a pull up a simulated 5% grade, 40 mph ~2500 rpm, and the AFR was 15.1. He wants that 13.5 - 14.
WOT he wants 12.5-13 AFR and the lowest we got was 13.9.
So time to do some research on jet's. I'm going to start with Tom Langdon.
Comments welcome.
Joe
