rpm drop

[ksurfer2]

When warmed up and idling in park/neutral, i need to set the idle speed to about 1800 rpm, this will net an rpm of about 1000rpm at idle in gear. Is this normal? Motor is a 512, 10.5:1 compression, solid flat tappet cam 600/600. dual eddy 1407's on a crossram. tci trans with a 3500 stall.

 

[493 Mike]

When warmed up and idling in park/neutral, i need to set the idle speed to about 1800 rpm, this will net an rpm of about 1000rpm at idle in gear. Is this normal? Motor is a 512, 10.5:1 compression, solid flat tappet cam 600/600. dual eddy 1407's on a crossram. tci trans with a 3500 stall.

Seems pretty high to me. No vacuum leaks? Maybe too lean of an idle mixture?
Mike

 

[dvw]

My bet is the convertor is to tight. My racecar uses 1407s with near stock calibration. Cam is [email protected]”. Only drops around 350 rpm. Try more base timing. You may have to reduce your mechanical advance to get everything higher you want it.

 

[F4R/T]

Too high and you’ll be out of your idle circuit too.. try the timing, fine tuning is fun! That’s why I think a lot of folks go fuel injection.. I enjoy the challenge!