Holley question

[Rod Greene]

Since I have never raced a car with a Holley on it or owned one, I have question.
I am working on a 440 6bbl car for the street everything I read says take idle vacuum and divide it by 2 to figure out the correct power valve. Is there any benefit running a high flow PV? How about on a race engine. I have my old stocker engine on a run stand and am playing with the 340 6pack setup just to learn a bit about it. Any suggestions?

Thanks

[Larry Hill]

Sorry can't help, I have zero knowledge on drive ability. Only care about WOT and air-fuel.

[Rod Greene]

So Larry in your race setup do you use a Power Valve? Regular or high flow?
The more I mess with the Holleys the better I like my Thermoquad.

[Eric Merryfield]

Originally Posted by Rod Greene

Since I have never raced a car with a Holley on it or owned one, I have question.
I am working on a 440 6bbl car for the street everything I read says take idle vacuum and divide it by 2 to figure out the correct power valve. Is there any benefit running a high flow PV? How about on a race engine. I have my old stocker engine on a run stand and am playing with the 340 6pack setup just to learn a bit about it. Any suggestions?

Thanks

Wouldn't run a PV on a race motor, certainly not on a stick.....whats the point! Frame of reference, I ran a stock 750 holley with a 6.5PV on my stock motor lil red express ran great, we dropped a crate motor long block with a 509 cam in it, some cheap 202 heads, and that killed the low end so much it felt like it needed a 2000 rpm higher stall convertor....put a 3.5 PV in it, and instant response, and tire shredding fun.

[SSDiv6]

Originally Posted by Rod Greene

Since I have never raced a car with a Holley on it or owned one, I have question.
I am working on a 440 6bbl car for the street everything I read says take idle vacuum and divide it by 2 to figure out the correct power valve. Is there any benefit running a high flow PV? How about on a race engine. I have my old stocker engine on a run stand and am playing with the 340 6pack setup just to learn a bit about it. Any suggestions?

Thanks

Rod, you need to talk to Steve Wann.
He is the guy that knows the in's&out's of the 6-bbl.

[Woodfin]

A reasonable suggestion is to equip them as Chrysler did originally. Also, in high-performance street trim, a 6.5 valve is common with a single carb. I estimate a 6.5 or 5.5 will be just fine.

I expect you already know, no matter what level of tune or refinement you attain, it will get "yardage" not mileage

[Rod Greene]

OK I have decided I need to step out of the dark ages and get an wide band AFR gauge.

I am thinking An Innovate LM-2 Looking on their web site and e-bay there are many options, What recommendations would you guys have? I would use it on my street cars as well as the race car.

[SSDiv6]

Rod,

Before you choose the Innovate LM-2, take a look at the Daytona Sensors WEGO and the NGK.
My experience is that their reading are more reliable than the Innovative and AEM.

http://www.daytona-sensors.com/wego-...---8-cyl..html

https://www.ngksparkplugs.com/produc...-ratio-monitor

[GallopinGhost]

On paper, the LM-2 looks good. I bought one and have had problems from day 1. Tech support ranged from decent to pretty sad. If I buy another, I'd give daytona a shot.