Quote:
Originally Posted by tom s
Have you tried it with VA hooked up?Tom
|
I disconnected it until I get my tuning sorted out.
Quote:
Originally Posted by steve25
I don’t understand why your idle vacuum is so low!
If you do a hot cranking compression test what results do you get?
It’s good though that you experimented and found out that you can not run a progressive linkage set up on a manifold like that with it’s nature to act more like it has two separate Plenums even though it’s pretty open on the inside!
|
I'd imagine the long duration cam and large amount of valve lift would be the cause of the low vacuum. I haven't done a compression test. Engine is a fairly fresh build with about 2k miles on it.
With progressive linkage driveability was fine but throttle response is day and night after switching to straight linkage.
__________________
1967 GTO, 432 (428+.030), 4-bolt mains, factory Nodular crank, scat rods, icon dished pistons, Lunati HR 243/251@.050, .618/.622 lift, Edelbrock 72cc round port heads, 10.5:1, offy 2-4 intake, Edelbrock 650cfm carbs, Super T10 trans (2.64 first), BOP 10 bolt w/ Eaton posi and 3.36 gears
|