Ignition advance, was Re: alternative engines, WARPED

[Aaron Willis]

At 10:39 AM 5/19/99 -0500, you wrote:
>The problem with going to manifold vac on some HEI's is that the vac can has
>as much as 25 degrees (crank) advance built in.
>with  say 12 degrees initial you have 37 degrees at idle, then when you
>start to get into it the cent. advance starts and the knocken
>commences. If you go manifold vac change the can to one with 10 degrees
>(crank). Now you have 22 degrees (crank) changing to lighters springs will
>bring the cent curve in quicker also. 
>                                                                     Don   
>
	Obviously not an HEI, but my '72 MGB was set like this as well, and acted
just the same.  Recently found out that this was the case and that the
vacuum should have been ported, which is why I put my hand up on this post
in the first place.


	Aaron Willis
	ICQ #27386985
	AOL IM: hemiyota
	http://surf.to/garage-te51 Garage TE51 International