Normal Idle?
Thread Starter
Racer
Joined: Feb 2012
Posts: 421
Likes: 27
From: Harrisburg PA
Normal Idle?
1977 Corvette
Holley 650 DP
Edelbrock intake
MSD Ready to run Dizzy
Unknown Cam (other than HFT)--maybe a step over stock? No noticeable lope, etc. I believe the motor was rebuilt/replaced at some time prior to my ownership.
17" steady vacuum at idle (1150 RPM)
10* initial + Full manifold vacuum
25* mechanical stop bushing
35* total, all in by 2800
TH350 Auto
Idles At a steady 600 in gear.
When I put it in park, it pulls the idle to 1150-1200.
The 1200 seems high to me for the curb idle--shouldn't be around 1050-1100, or am i being too much of a perfectionist?
Holley 650 DP
Edelbrock intake
MSD Ready to run Dizzy
Unknown Cam (other than HFT)--maybe a step over stock? No noticeable lope, etc. I believe the motor was rebuilt/replaced at some time prior to my ownership.
17" steady vacuum at idle (1150 RPM)
10* initial + Full manifold vacuum
25* mechanical stop bushing
35* total, all in by 2800
TH350 Auto
Idles At a steady 600 in gear.
When I put it in park, it pulls the idle to 1150-1200.
The 1200 seems high to me for the curb idle--shouldn't be around 1050-1100, or am i being too much of a perfectionist?
Last edited by keithl1967; May 26, 2018 at 12:34 PM.
Melting Slicks
Joined: May 2012
Posts: 2,192
Likes: 343
From: Allenton Wisconsin
1969 I set the curb idle at 850 to get 700 in gear with a 400turbo. I suspect that 1200 you get engine run on [dieseling] after turning key off. What does the engine idle at with the A/C on? What is the vacuum at the 600 rpm level? 17" lbs at 1150 rpm seems low, my 434 with a cam gets 20lbs at idle. What type of exhaust system is on the car? Let us know,T
