[psi999]

Well finally got my car going off to the dyno on the weekend and am looking at buying a few sets of plugs for the tune.

What heat range plugs would be my best option?

S13/4/5 run heat range "6"
GTiR run head range "7"

… and I was looking at running an "8" heat range in my GTiR SR20 (would even run a “9” if I could, pull as much heat out of the cylinder as possible).

Has anyone ever used a colder plug like this on a GTiR motor?..... Reason being I had "8's" in my S14 SR20 and it would foul up, where as "7's" would run very clean.

FWIW, I’m running a stronger Mitsu waste spark ign setup & module (no GTiR dissy & single ign coil) and am looking at running cheap common v-grove copper plugs and changing them often.

Thanks in advance.

 

[Zexel]

In my DE+T3/T4 car, I run BKR7E plugs. I ran BKR6E, and they fouled out. Haven't tried BKR8E yet, and don't plan to. I think BKR7E is the best all around plug for a boosted SR.

Corey

 

[Luis]

Shouldnt your 7s foul out more since they are colder than the 6's?

 

[javierb14]

i ran a 9s in my car all the time...did foul easier, but at about $2/per...no big deal iirc, the NGK part # r5671a-9 or #5238.

 

[Zexel]

Shouldnt your 7s foul out more since they are colder than the 6's?

Not if you're boosting.

Corey

 

[celm]

i have the NGK7 gaped at .28 on my RNN14
psi999 what engine manigiment are you using that you dont need the Dissy anymore

 

[daveracer]

I now run an 8 range NGK plug.

 

[SR20Turbofreak]

I had 7's in my 500whp gtir motor, stock ignition gapped at .030 and ran fine. never fouled out... I may try 8's though for the new setup..

 

[psi999]

Thanks guys, looks like "8's" are the go..... i'll try and pickup a couple of sets for my tune this weekend.

Celm - I'm running a Microtech LTX8 ECU.