Holley 2-stage Power Valve 70-26-70-26

Holley 2-stage Power Valve 70-26

1 Review(s)

Your Price: $22.95

13.0 x 3.5HG

Part Number: 70-26

Availability: In Stock

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Customer Reviews

2-stage power valve for some Holley carburetors.

SPECS:

1st stage: 13.0" Hg
2nd stage: 3.5" hg

CARBURETORS:

Holley 4180, 4190
Holley 4500
Holley 2300, 2380

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5.0

Awesome!

I'm running a 454 BBC with dual 750 CFM Holley carbs, on a vintage Edelbrock cross-ram intake manifold. Previous tuning efforts had me using the 10.5 Holley PVs, but I could see from the vacuum gauge that I needed a higher vacuum setting, to solve a lean spot when going from cruise to medium acceleration around 2000-2300 RPM. These power valves solved the 90% of the problem (still working on the low-speed air bleeds). I can watch on the vacuum gauge as I roll into the throttle pedal, vacuum drops and when it gets to 13", the engine just starts pulling like a freight train. Price is great, they come on exactly when they're supposed to. They have very predictable behavior, and have really made my Corvette come alive.

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Reviewed by: Dr. Eric Woodell from READING, PA on 5/12/2024

Holley 2-stage Power Valve 70-26

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