Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 502 HO idle RPM
Thread: 502 HO idle RPM
View Single Post
  #5 (permalink)  
Old 09-03-2010, 10:46 AM
cobalt327's Avatar
cobalt327 cobalt327 is offline
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,036
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
Quote:
Originally Posted by rajsid
You are right, I think the key is to keep the rpm low enough that there is no mechanical advance.



The engine is timed at the 502 HO spec. I am getting 3600 @ 36 with the vacuum disconnected. The dist that I am running gives 22 degrees of mechanical. So 36-22=14 is the initial timing that I have set to. Nowhere can I find any reference of the initial RPM.
14 BTDC sounds pretty good. You might even go for a little more, but you'd need to limit the mechanical to keep the total where it needs to be.

I didn't find an initial timing rpm spec, either. That's why I thought the 800 rpm spec that the Ramjet uses might suffice.

But as long as there's no mechanical advance sneaking in on you and the vacuum is disconnected and plugged, you're good to go.

Good luck.
Reply With Quote