Norwood

[intocarss]

Originally Posted by Ron in SoCal

Green is better than Pink. Got it.

And EFI is better then Carbs

[Sieg]

Originally Posted by Ron in SoCal

Green is better than Pink. Got it.

Originally Posted by intocarss

And EFI is better then Carbs

[fleetus macmullitz]

Originally Posted by Sieg

That fool lets that happen to him...not this guy.

[intocarss]

[Track Junky]

Have you tried bumping up the discharge nozzle size yet?

[Sieg]

Originally Posted by Vegas69

Mine came with Pink as well. It's for drag racing and absoutely horrible for throttle response. I'd jump up to orange as it delivers better volume on tip in..... I'm pretty positive that's the cam I used.

Money! Thank you.

Still not ideally crisp but in the range now. The pump arm was at about .002 freeplay, I'll experiment lengthening/shortening the link +/- one flat of the nut and see if that helps.

[Sieg]

Originally Posted by Track Junky

Have you tried bumping up the discharge nozzle size yet?

No, but were getting there! 31's in it now, 33's and 35's are probably worth testing.

It felt pretty strong with smooth primary to secondary transition in 3rd & 4th gear hard roll on's this afternoon.

[protour73]

Sieg, here's great spec chart for Holley accelerator pump cams. The amounts are per 10 strokes of the pump arm and it is based on a 50cc pump, but is a good visual to see the differences when adjusting the cam position.

[DaleTx]

Originally Posted by Sieg

Big flat spot (as I'd call it) no blubbering, then it's fine. If I rev it and don't let it come all the way down to the 1K idle, say 1500 rpm, and crack the throttle it's fine. This has all been while actuating the throttle by hand.

After reading this.... I was thinking maybe you should try advancing the cam a few degrees and see if the response off the bottom gets better. Maybe it's just a matter of changing the valve timing events slightly.

Just throwing out another thing to try.... not sure if you considered this or not.

[Sieg]

Originally Posted by protour73

Sieg, here's great spec chart for Holley accelerator pump cams. The amounts are per 10 strokes of the pump arm and it is based on a 50cc pump, but is a good visual to see the differences when adjusting the cam position.

Thanks Scott, I haven't seen the volumes charted before, nor the WOT pump arm dimension measured.

Originally Posted by DaleTx

After reading this.... I was thinking maybe you should try advancing the cam a few degrees and see if the response off the bottom gets better. Maybe it's just a matter of changing the valve timing events slightly.

Just throwing out another thing to try.... not sure if you considered this or not.

Dale - The orange pump cam removed the off idle flat spot. What threw me was I thought I had eliminated the flat spot and bumped the initial timing which resulted in a big flat spot no matter what the initial timing was set at. I still don't understand what factors caused that to happen. Without an AFR monitor I'll assume it was lean to real lean in the transition and the motor could have loaded up a bit and when the timing was set it cleaned up at emphasized the lean condition.....

Based on the morning test drive it appears I'm finally heading in the right direction now.