Race small block stroker...what plug?

[dusterdoug]

Title says it all: What are you guys running for plugs in your small block strokers? Our's is 12.2:1, small chamber (RHS) head...

Thanks!

 

[pettybludart]

I have Eddy aluminum s.b heads on my 408 and am running the Auto-Lite AR-3910,s.Hope this helps.

 

[Mad Dart]

The RHS Heads use the smaller MAGNUM based spark plugs.............

 

[dusterdoug]

The RHS Heads use the smaller MAGNUM based spark plugs.............

What plugs are you running in that Mad Dart?

 

[Mad Dart]

I have 2 sets that I run........I will get the numbers for you tomorrow,drawing a blank. I will post them in the morning. My compression is a bit lower than yours though at 10.20:1

 

[dusterdoug]

I have 2 sets that I run........I will get the numbers for you tomorrow,drawing a blank. I will post them in the morning. My compression is a bit lower than yours though at 10.20:1

Okay about the CR, at least your numbers will give us a point of reference and maybe we can figure a colder plug from there.

Thank you!!

 

[Mad Dart]

Dusterdoug,

Is this a stroker build? What kind of fuel you gunna run?

 

[stroked 340]

I run aluminum heads on both my 11.9 to 1 416 and my 10.7 to 1 360 with autolite AR-3924's...

 

[Mad Dart]

AUTOLITE 3924 Works best for me so far, this is the standard plug.

I Ran the Autolite 3924 Double Platinum plugs that are twice the price and they did
nothing but foul out for some reason. I just checked my plugs this morning and the regular 3924 has a perfect burn pattern.

 

[1wild&crazyguy]

ngk r5670

 

[flyfish]

I use NGK R5671A-7 and sometimes -8's.

 

[Mad Dart]

I use NGK R5671A-7 and sometimes -8's.

1wild&crazy guy] ngk r5670

Do you guys know if these plugs also come in the MAGNUM base?

 

[flyfish]

Do you guys know if these plugs also come in the MAGNUM base?

I don't know...sorry.

 

[dusterdoug]

Dusterdoug,

Is this a stroker build? What kind of fuel you gunna run?

It is a 416, yes. Fuel? 110

These numbers posted give me a good starting point and a REAL auto parts guy can get to a colder plug.

THANKS AGAIN!

 

[sbmmustang]

Do you guys know if these plugs also come in the MAGNUM base?

That same plug fits an LA head to.
I run NGK R5671A-8 in my E-85 440W8 head SB and 15.4 comp.
That plug is a 5/8 head.

 

[Mad Dart]

That same plug fits an LA head to.
I run NGK R5671A-8 in my E-85 440W8 head SB and 15.4 comp.
That plug is a 5/8 head.

Damn that is some compression! That E85 sounds like it does a great job.

 

[bad440]

That same plug fits an LA head to.
I run NGK R5671A-8 in my E-85 440W8 head SB and 15.4 comp.
That plug is a 5/8 head.

in my 360 w2 i run autolite 63s that mustang is ihe baddest fox body i have ever seen got my buddy thinking ,my swinger devastates his 5.0

 

[sbmmustang]

Damn that is some compression! That E85 sounds like it does a great job.

Yes it's better than buying C14 at $11-12 a gal so I switched but I have to test it to make sure it is E84-86% not less.There are alot of other guys in the East coast with Mustangs with SBM and BBM in them.