What plugs for ls3 twin gt35s
07-07-2011, 02:50 PM
#1
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What plugs for ls3 twin gt35s Hi I have a rx7 fitted with a stroked ls3 , et performance heads,fast intake,two gt35s 1.06 housings , I have run it on a dynojet dyno it is making 804bhp and 823 ftlb @ 10 psi but above that it is missing real bad , I think it is blowing he Sparks out. At the moment on ngk tr55 plugs on STD gaps , what houd I run ?
07-07-2011, 03:27 PM
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Valve springs are new duals it revs fine just not when under more than 10 psi , we all are sure it's plugs and they are STD at the moment I will get some more and close them up a bit,
Glad you like the headers they took for ever to do
Glad you like the headers they took for ever to do
Last edited by tinker-27; 07-07-2011 at 03:41 PM. Reason: Messed up
07-07-2011, 03:52 PM
#6
I had the same problem at 15 psi. I was running ngk v power 9 gapped to 30. I switched to v power 8 and gapped them to 22.I havn't ran it again. Nice looking set up good luck
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07-08-2011, 04:16 PM
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checked today and they are tr6 NGKs at 50" thou , I've got some 7s coming for daily driving and some 8s for dyne and speed days and I will gap them down to 22-25 and give them a go . Thanks guys
07-12-2011, 06:47 AM
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I've always ran Autolite non-projected plugs with my ET heads with the gasket seal (you have the aftermarket ETPs right?)
they offer the autolites in 7, 8. 9, 10 and 11 heat ranges.
7 - AR3935
8 - AR3934
9 - AR3933
10- AR3932
11- AR3931
I ran the AR3933s (heat range 9), I'm trying out some NGK R5671A-10 now. Definately tighten up the gap ALOT. You might also want to consider upping the dwell time on the coils in the tune.
they offer the autolites in 7, 8. 9, 10 and 11 heat ranges.
7 - AR3935
8 - AR3934
9 - AR3933
10- AR3932
11- AR3931
I ran the AR3933s (heat range 9), I'm trying out some NGK R5671A-10 now. Definately tighten up the gap ALOT. You might also want to consider upping the dwell time on the coils in the tune.
07-14-2011, 04:01 PM
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Thanks for the info guys , I have some ngk 9s coming , they are etp heads and I run aftermarket ecu which I can alter the dwell time , can't remember what it's set at but I will check . What time do you guys run ? .
