What plugs for the fast guys?

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turbotwister

FAST COMPANY PERFORMANCE
Joined
Oct 21, 2002
Messages
620
Hi,

What sparks plugs are the high boost ,fast iron headed cars using?

Im talking the 10.50 and faster cars(TSM etc. etc)


Thanks in advance,
Nick
 
there are several choices

Autolite 103's
NGK TR6

Have to gap em tight, I started out at .028 and ended up going all the way down to .025 @ 25 PSI
 
those are the plugs of choice for aluminium heads.im inquiring about steel heads. thanks anyway:biggrin:

come on you "fast" guys!i know your out there!
 
Try the NGK R5674-7 [stock no. 5034], these are 2 steps colder than a stock plug.
 
You might have better luck in the "Stage II" section.
Conrad
 
Thanks for the replys guys.i have had experience with most plugs .Im up for some experimenting with different plugs since im in tuning mode.

Nick,

Ive never tried that plug.i think i will now though:biggrin: .


Thanks again,
Nick,
 
CR42TS. Ran them down into the 9's on iron heads. CR is a bigger electrode than the r42ts which will also work.


Sully
 
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