When to switch to a race plug ?

[434nova]

Was looking to run a ar 3933 but am worried about it fouling out rather quickly , was running a autolite 104 but now im running alky with 26 #s of boost. How do you determine when to switch to a race plug. My car has gn1 heads , I believe the street plug of a non extended tip is a ar 3934. I drive the car a few times a week but will be racing about a couple weekends a month , and playing with it on the street. I dynoed it with a 104 plug with alky and 26#s. So what is a good decision on a plug the 3933 or 3934 ? Thanks

Posted from the TurboBuick.Com mobile app

 

[434nova]

Bump. For the experts

Posted from the TurboBuick.Com mobile app

 

[Nick Micale]

With my 2 e-85 cars with alum heads I use AR 3932 or AR3933 depending on boost and temp.

More boost, over 20 psi, and warmer weather, the AR 3932 is my choice.

 

[Boost231]

I'm sure your car will be just fine running a AR3933, I would rather run a colder plug and foul it before I run a hotter plug and burn up my motor. My car being a little different I'm running a AR3931 on the street and track

Posted from the TurboBuick.Com mobile app

 

[434nova]

This is a pump gas 93 and alky car. Boost231 that is great logic. Rather change plugs than a motor. Thanks again guys

Posted from the TurboBuick.Com mobile app

 

[434nova]

One more thing do I use the gasket with the ar 3933 or run it with out

Posted from the TurboBuick.Com mobile app

 

[434nova]

Help on the spark plug gasket question. Thanks

Posted from the TurboBuick.Com mobile app

 

[Phoneguy]

Install the gasket...

Bryan

 

[434nova]

Thank you , Bryan

Posted from the TurboBuick.Com mobile app