fast59

So I have been reading up on Afc mods and was gonna do mine today than I found a thread stating that a 215 pump is a waste of time to mod Afc that it does'nt make any difference.Is this true??

9812vram

I don't know 100% for sure, but I highly doubt it. It operates the same as the 180 pump. The differences between the two are pretty minor as far as I know, so the mod should be the same and do the same...

Lil Dog

The spring in the 215 pump his strong and trimming the AFC stop for full travel lets you use the plates full depth, especially at full forward position. Without a dyno test before and after, I can't say for sure how much of a difference it made for me. Having the softer spring and trimming the stop made the AFC actually go from full retracted to totally behind the plate profile.

The upgrading to the Mack plug for rack travel does not work with the 215 pump and will actually cause a reduction of WOT fuel.

Tate

The lower helix doesn't regress like that. More rack travel still equals more fuel. But due to the upper helix, more rack travel also means less timing.

fast59

Ok thanks for the help.Now Tate you meantion of of less timing I have mine set at 16 degress,should I increase it a bit more because of that or just leave it alone.

Tate

You can, depends how often you use the throttle. If DD, I'd leave it lower. You're not at enough rack travel to retard it much at highway speeds. If it were a racer/puller, absolutely bump it up. Just make sure the head is buttoned down first.

fast59

Haven't studded head yet and its my dd play toy so I'll just leave well enough alone.