Thread: Anyone running holleys on their superchargers?

Tweet

Thanks.
A friend had loaned me his wideband A/F meter, but the O2 sensor was faulty. I'm hoping to get a good one off him in the next couple of days. Then, (weather permitting) I can see for sure what the A/F ratio is.


I think it's always going to be a work in progress. Maybe I should just sell it and buy a honda civic. No bloody way!!! lol

Sometimes the PV just doesn't work right on a blown motor. One of the local gys ran into that last year. He finally used the Holley PV blocker plugs and some richer secondary jets and it runs great now.

Manifold reference is the way to go but it is possible you have a vac leak as noted.

I got it all dialed sweet on saturday. Ran the wideband A/F meter, and fiddled with the idle, and the mains. I also had a problem with the accelerator pump check needle. the shaking of the motor was unseating it, and I was getting accelerator discharge nozzle dribble. bought a fangled kit from Mclendon carburator to remedy this. took quite a bit of fiddling around to get this spot on. (had to keep the needle seated, but also had to have little enough spring pressure on the needle to allow the pump actuator arm spring to overcome it so the pump could discharge.
Ended up with an Idle mixture around 12.7:1, and it runs about 12:1 at wide open throttle. At cruise throttle when doing the speed limit the mixture hovers around stoich too.
The larger carb has really made a difference to the available power up top too. The power curve used to begin tapering off about 6000, but know it pulls like crazy all the way to the red line. It was well worth the perseverence.

That's great. Thanks for letting us know how it turned out!

Kitz

Now I can finish fitting the rest of the nitrous kit