E85, iron heads and 30 PSI, What / which spark plugs to use ??

[TURBOPOWERED68]

What brand spark plugs to use?
What heat range to use?

My car is a 99.99999% street car BUT I will be going to the track real soon and I will push the car HARD.

Right now i am using AC Delco R43TS or CR43TS gaped at .30

Talk to me guys.

 

[Nick Micale]

I would use Autolite AR133 or AR124 with a gap at 0.028"

These are race plugs and have heavy electrodes, and are NOT projected tip which will be much less prone to the effects of high heat, especially at 30 psi.

The AC Delco junk plugs have proven to be very unsatisfactory for us on street cars, and would never trust them in a race application.

 

[TURBOPOWERED68]

I would use Autolite AR133 or AR124 with a gap at 0.028"

What is thr difference between the two you posted?

 

[Nick Micale]

Sorry, my typing sucks, should be AR133 or AR134?

The AR133 is the colder plug which I use for higher boost.

 

[TURBOPOWERED68]

Sorry, my typing sucks, should be AR133 or AR134?

The AR133 is the colder plug which I use for higher boost.

I am going to pick up both sets
Thanks for your help.
David

 

[TurboBuick86]

Hey TurboPower.. Grab a set of NGK's UR6's & gap them between .025-.030
Gabby.


Posted from the TurboBuick.Com mobile app

 

[Boost231]

Ar133, the colder the better

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[turbojoe1]

Good simple info

 

[we4Mateo]

Hey TurboPower.. Grab a set of NGK's UR6's & gap them between .025-.030
Gabby.


Posted from the TurboBuick.Com mobile app

UR5's would be better at that boost or use a YR5 for a non projected tip plug. .025-.030 gap with stock ignition.

Posted from the TurboBuick.Com mobile app

 

[turbojoe1]

To follow up the op's question, what about when using a tr6? Plug, gap and heat range? Thanks

 

[TurboBuick86]

I used TR6's on my GN1's & ran 9.3's with them with no problem lol


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[kidglok]

Autolite had a 132 plug also but I think they discontinued them. Same thing with the AR3932, coldest plug but not available anymore.