What power valve to use
Thread Starter
Burning Brakes
Joined: Jan 2000
Posts: 997
Likes: 0
From: Columbus, IN USA
What power valve to use
I need to know which power valve to use on my vette.
The vacuum is much better now after the rebuild and the new cam.
The gauge reads 19-20 at 750 rpm (idle), I use to only have 11-14 at idle.
I have a Holley 3310-4. My rebuild kit came with a 7.5 or 6.5, I can't remember at the moment.
Do I need a different one for the carb to work properly??
Thank You in advance. :confused:
The vacuum is much better now after the rebuild and the new cam.
The gauge reads 19-20 at 750 rpm (idle), I use to only have 11-14 at idle.
I have a Holley 3310-4. My rebuild kit came with a 7.5 or 6.5, I can't remember at the moment.
Do I need a different one for the carb to work properly??
Thank You in advance. :confused:
Le Mans Master
Joined: Apr 2000
Posts: 5,202
Likes: 10
From: cincinnati ohio
St. Jude Donor '09
Re: What power valve to use (BLT-71)
The best way to select a power valve is to observe manifold vacuum reading during steady cruising speeds and use a valve that opens about 2 in. below the lowest STEADY reading :cheers:
[Modified by yellow 72, 3:35 PM 3/5/2002]
[Modified by yellow 72, 3:35 PM 3/5/2002]
Racer
Joined: Feb 2002
Posts: 276
Likes: 1
From: Arlington Texas
Re: What power valve to use (yellow 72)
