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Quote:

Originally Posted by protour73 (Post 469665)

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. :thumbsup:

Quote:

Originally Posted by DaleTx (Post 469679)

:sieg:

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.....:headscratch:

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

:thankyou:

You swapped the pink cam for the orange (just primary?) ? .... what size is your primary pump nozzle (squirter)?

Quote:

Originally Posted by Sieg (Post 469715)

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

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.....:headscratch:

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

:thankyou:

Quote:

Originally Posted by protour73 (Post 469722)

You swapped the pink cam for the orange (just primary?) ? .... what size is your primary pump nozzle (squirter)?

Orange on the primary, I'll start experimenting with the secondary circuit when the primary is dialed. Secondaries come in pretty smooth right now but there's room for improvement.

Nozzles are 31's on Primary & Secondary.

Quote:

Originally Posted by Sieg (Post 469715)

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

:thankyou:

A road trip to stately Weld Manor?

#someAlbertMasterBruce'sButlerSarcasm

:hello:

Quote:

Originally Posted by compos mentis (Post 469769)

A road trip to stately Weld Manor?

:hello:

If I get to sleep with Stella. :unibrow:

Quote:

Originally Posted by Sieg (Post 469779)

If I get to sleep with Stella. :unibrow:

:hello:

Ok Sieg, what's up with the car?

Quote:

Originally Posted by protour73 (Post 470149)

Ok Sieg, what's up with the car?

Zoom Zoom :D

:RunninDog: :RunninDog: :RunninDog: :RunninDog: :RunninDog:

Intermixed clouds and sun, expected high 71*, breakin oil replaced with Joe Gibbs HP2, carb tune is getting close, tank is full, time to que up some driving music and take a little ride in the country!

:thumbsup: