Carb Tuning - Richer? Leaner?

[Vegas69]

I answered the question I knew the answer to, know it all.

[GregWeld]

Originally Posted by Vegas69

I answered the question I knew the answer to, know it all.

Okay --- fair enough!

[protour73]

Thanks a lot for the great responses Todd, Gaetano and Greg.

Jody too!!............. that's good detail on the WOT numbers, I need to check those.

[DaleTx]

Scott... I have a Wideband air/fuel gauge in my car and at cruise (light load) it always measures in the 14.5-15.5 range. At wide open throttle it measures 12.8-12.9. This is what was programmed into the ECM and it works great.

The main thing is to keep the AF ratio in the high 12's to low 13's at wide open throttle like the other guys said. When I hit the throttle hard the AF drops immediately into the 12's.

[protour73]

Jody and Dale, you guys were right on!!

I switched to 76 jets from 74's, and jumped up to the 8.5 power valve and it's damn near perfect. At cruise now AFR is at 14.3 to 14.8

At WOT, AFR is at 12.8-13.3. I went from the pink that the carb came with, to the blue with a very positive change, but I might change again to the orange cam. If I didn't have the wideband O2 sensor and just went by "seat of the pants" feel, it's damn near perfect for my driving style.

[camcojb]

Originally Posted by protour73

Jody and Dale, you guys were right on!!

I switched to 76 jets from 74's, and jumped up to the 8.5 power valve and it's damn near perfect. At cruise now AFR is at 14.3 to 14.8

At WOT, AFR is at 12.8-13.3. I went from the pink that the carb came with, to the blue with a very positive change, but I might change again to the orange cam. If I didn't have the wideband O2 sensor and just went by "seat of the pants" feel, it's damn near perfect for my driving style.

A wideband is a great tool for anyone who has a hot rod. Congrats!!

[Track Junky]

Great news.

[DaleTx]

Very cool... glad to hear you got it dialed in

[Sieg]

.........wideband envy

[Rick D]

Originally Posted by protour73

Jody and Dale, you guys were right on!!

I switched to 76 jets from 74's, and jumped up to the 8.5 power valve and it's damn near perfect. At cruise now AFR is at 14.3 to 14.8

At WOT, AFR is at 12.8-13.3. I went from the pink that the carb came with, to the blue with a very positive change, but I might change again to the orange cam. If I didn't have the wideband O2 sensor and just went by "seat of the pants" feel, it's damn near perfect for my grandpa driving style.

Fixed it for ya!!!