I put a stock 650 cfm on my 360 big block and when setting it up back fired quite a bit and took out the power valve. I took it apart and has a number 9 stamped on it. Should I replace it with another 9? The engine is stock with lake style headers. I've heard you should run them and check the vac to determine what valve to install but it's apart now. I'm running an automatic transmission too, in case it matters. I even looked online for a number 9 and found 8.5 and 9.5s but no 9.
Holley power valve help
- Thread starter Bearcamp
- Start date
Help Support Rat Rods Rule:
bgbrktracer
Well-known member
- Joined
- Oct 5, 2010
- Messages
- 125
Must be older carb without power valve protection. Kit to solve that problem is about 6 bucks at most parts stores. I allways run a 45 or 55 power valve, no bigger that 65. That way you know it won't come in till you need it. I've seen cars with correct jets and float levels running way too rich because of incorrect power valve.
Sumfuncomet
Active member
- Joined
- Jan 16, 2012
- Messages
- 25
Holley tech line
Holley help is only a phone call or email away. Go to the source and ask them! Good advice from them.
Holley help is only a phone call or email away. Go to the source and ask them! Good advice from them.
