What plugs for 15-18 psi?
What plugs for 15-18 psi? I have searched, found nothing in this range. I am looking for about 15 to 18 psi of boost and am wondering what experience with plugs you've had. I am only running 92 octane. Some say NGK TR6, but I think one colder would be better. Is there a TR7, I haven't seen one. Anyone have a number for it?
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Joined: Jul 2004
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From: Washington
not true, rick. The dash eight is two steps cooler than the TR6.
https://ls1tech.com/forums/showthread.php?p=2089592
https://ls1tech.com/forums/showthread.php?p=2089592
I have used TR6's as well as the quote unquote 7's. Ran 6's in the high teen to low 20 psi range. Switched to the 8's for a short time, but they fouled to easily for my taste and the 7's held up quite well. Ran those plugs anywhere from 24psi up to 30 psi last year.
running 6's in the truck at 10 to 12 psi, FWIW
running 6's in the truck at 10 to 12 psi, FWIW
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i have ran up to 18psi so far on tr6's, i tried the tr7(br7ef) and didn't like the way they ran.
to go from stock to tr6 you can just barely tell they are in there, just a slighly worse idle. then goto the tr7's and it had an audiable miss at idle and felt much rougher. i have tried 2 sets of the 7's and they both ran the same so i went back to the tr6's. i figure i will step up to a colder plug when i show an actual need to step up.
to go from stock to tr6 you can just barely tell they are in there, just a slighly worse idle. then goto the tr7's and it had an audiable miss at idle and felt much rougher. i have tried 2 sets of the 7's and they both ran the same so i went back to the tr6's. i figure i will step up to a colder plug when i show an actual need to step up.
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Verdad Gallardo TECH Enthusiast
Joined: Jul 2004
Posts: 546
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From: Washington
yeah the LS1 heads dissipate heat well enough that you'll never need anything cooler than a 7-range. dash eights and nines are from some OHC motors and oil/air cooled motors like vee-dubs and porsches where the head runs much hotter.
I doubt I will ever be over 20 psi on pumpgas, But I was worried about a TR6 leading me to detonate at that level on pumpgas. BUT, sounds like a TR6 wouldn't be a bad place to start. I guess I will reconsider a TR6.
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From: Forced Induction Heaven
Originally Posted by y2khawk
I have used TR6's as well as the quote unquote 7's. Ran 6's in the high teen to low 20 psi range. Switched to the 8's for a short time, but they fouled to easily for my taste and the 7's held up quite well. Ran those plugs anywhere from 24psi up to 30 psi last year.
running 6's in the truck at 10 to 12 psi, FWIW
running 6's in the truck at 10 to 12 psi, FWIW
Did you keep the factory gap of .039 or did you gap them down. I have the TR7 IXs and am getting a little back fire (occasionally) at idle and when off throttle cruising.
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From: Motorhome, Freeways, Truckstops, Pits
Don't take a poll. Ask Kurt at W2W.
Originally Posted by nitrorocket
I have searched, found nothing in this range. I am looking for about 15 to 18 psi of boost and am wondering what experience with plugs you've had. I am only running 92 octane. Some say NGK TR6, but I think one colder would be better. Is there a TR7, I haven't seen one. Anyone have a number for it?
i bounce between a tr-6 and an autolite ar 3911 (per w2w)
i think the 3911 is a little colder than the tr6 but i havent noticed a difference in performance at mid teens boost.
i think the 3911 is a little colder than the tr6 but i havent noticed a difference in performance at mid teens boost.
Registered User
Joined: Jun 2002
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From: Forced Induction Heaven
Originally Posted by MIGHTYMOUSE
i bounce between a tr-6 and an autolite ar 3911 (per w2w)
i think the 3911 is a little colder than the tr6 but i havent noticed a difference in performance at mid teens boost.
i think the 3911 is a little colder than the tr6 but i havent noticed a difference in performance at mid teens boost.
Teching In
Joined: Mar 2005
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Well I'm going to be running 15+ psi and on my N20 on my turbo set up. Before I ran just 300hp of spray and ran a auto lite Ar93, the straps are cut back and have a factory(auto lite) gap setting of .026. I would say the ngk's are a little more forgiving than the autolite as the ngk will melt the strap at a lower temp to save the cylinder unlike the auto lite. As for the my N20 set up on my car I never hurt a plug and that was on a stock short block and heads.
You can call the auto lite tech line, give them your application and they will give you a plug.
You can call the auto lite tech line, give them your application and they will give you a plug.
Originally Posted by Shinobi'sZ
What do you run the gap at on the TR6s? You still using stock plug wires.
i run tr6's at what they are pre gapped at which is around .035, yes stock plug wires.
denso iridiums I used the denso ir. at one point can remember the initials before the number but the were the -22s the equivalent to a tr6 I believe the gave the car a nice idle quality.......but I was having misfire problems and switched to tr6. It ended up not being the plugs but I was too lazy to put the densos back in they had a good cold start(densos). They are way too expensive though.
Originally Posted by Pro Stock John
I'm running TR8's, MSD wires, and never have any ignition/missing problems.
