R4 Day on the Dyno

[lschuc]

First calibration run on the dyno. After the run, changed settings and getting ready for a full run in this 1963 Avanti R4 with Paxton Novi 1,000 supercharger

Changed timing and leaned out the carburetors for a new dyno run for a 63 Avanti R4 supercharged, paxton Novi 1000.

[mfg]

Lew, any idea what the horsepower/torque figures were?

[lschuc]

We were pretty much testing the engine and car, since it had not been run or driven since being finished. We figure that we were getting about 350 hp at the engine and 250+ at the rear wheels through the torque converter and auto transmission. That said, the boost was too low and Brad needs to change the Novi 1000 pulley to put out more boost and change the timing and carb jetting.

[mfg]

Wow!....Extremely interesting stuff!!

[silverstude]

.......... and change the timing and carb jetting.

Interesting that all this can be done without causing any mechanical grief.

[lschuc]

That is the main purpose of the dynometer.... to test the engine, fuel/air mixture, timing and all other systems to make sure that nothing bad happens to the engine or car once out on the road. In this case, we discovered that the Paxton Novi 1000 supercharger needs a smaller pulley to put out more boost, and both carbuertors need tweaking to get the mixture better. Air/fuel ratio was good at lower RPMs but started to got too rich over 4,000-4,500 rpms.