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Ziegelsteinfaust · 10-16-2021, 07:49 AM

I have been having a range of tuning issues that had me frustrated, and ready to take it to a shop on my 383 LT1 in my C10. The engine is a smog legal build with a best of everything circle 1994.

On a whim I bought 2 high flow power valves, and I made serious headway again.

So I will say if your running a vacuum secondary Holley with around 450hp. Skip the normal version, and try the high flow.

10-16-2021, 07:49 AM	#1
Ziegelsteinfaust Registered User Join Date: Dec 2012 Location: Temple City Posts: 3,560	Holley power valves. I have been having a range of tuning issues that had me frustrated, and ready to take it to a shop on my 383 LT1 in my C10. The engine is a smog legal build with a best of everything circle 1994. On a whim I bought 2 high flow power valves, and I made serious headway again. So I will say if your running a vacuum secondary Holley with around 450hp. Skip the normal version, and try the high flow.