anyone running ngk tr-7's?
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anyone running ngk tr-7's? im running tr6's now set at .040.
scr is 11.5:1 and dcr is 8.5:1. 150 wet shot. car sees some kr on the street but none on the dyno. just thinking about everything before i take it apart.
scr is 11.5:1 and dcr is 8.5:1. 150 wet shot. car sees some kr on the street but none on the dyno. just thinking about everything before i take it apart.
Bigger shots can have a tendency to turn the projected tip tr6s into blow torches if any of a few parameters get out of whack. The 7s are a colder recessed tip and more forgiving in a high cylinder pressure arena, imo.
Robert
Robert
I plan on running them next year. I put about 7 runs on a 200 and about 10 150 shot runs on TR6's before I changed them. They looked great. So, to piggyback off of Robert, if you have a solid tune, a 200 shot is about the ceiling for the TR6.
I'm running a #8 on motor, and a #9 on nitrous, both gapped at 35 I think on the street the #9's would foul out easy, but the #8's have been very good.
I am running a good bit more compression though at 13.5 to 1 static, and the dcr is way up there as well. Torco 116 n/a fuel, torco 118 Nos blend for nitrous.
I am running a good bit more compression though at 13.5 to 1 static, and the dcr is way up there as well. Torco 116 n/a fuel, torco 118 Nos blend for nitrous.
Robert
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I'm running a #8 on motor, and a #9 on nitrous, both gapped at 35 I think on the street the #9's would foul out easy, but the #8's have been very good.
I am running a good bit more compression though at 13.5 to 1 static, and the dcr is way up there as well. Torco 116 n/a fuel, torco 118 Nos blend for nitrous.
I am running a good bit more compression though at 13.5 to 1 static, and the dcr is way up there as well. Torco 116 n/a fuel, torco 118 Nos blend for nitrous.
Robert
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Verdad Gallardo 150 shot thru a Nos plate. Timing is pretty low but for some reason my car's never really liked alot of timing, the n/a tune I had in it all season was only at 20, we had it up more but it didn't make any more power so it wasn't worth it.
I run the 118 fuel because it's just added safety and that's what my shop uses with all the nitrous cars, so they know the tuning with it/jetting when using it. My nitrous tuneup is still well on the safe side, but again, better safe then sorry. I pulled every plug after every run when I went to atco and sprayed it the first time and every single plug looked great porcelan had a nice tan color to it, ground strap had ust about zero heat to it, etc.etc. I probably could have used the #8 plugs and been fine, but I had to buy plugs anyway so I went a step colder for the first trip to be safe. Better to start safe then start off too hot and hurt something.
IMO a #6 plug is a good n/a plug for under 12 to 1 compression, over 12 to 1 I'd go #7 n/a, or any nitrous at all with under 12 I'd run a #7, over 13 to 1 I'd run a 7 or 8 n/a and an 8 or 9, or even a 10 with nitrous, dependign on what the compression/size of the shot is.
I run the 118 fuel because it's just added safety and that's what my shop uses with all the nitrous cars, so they know the tuning with it/jetting when using it. My nitrous tuneup is still well on the safe side, but again, better safe then sorry. I pulled every plug after every run when I went to atco and sprayed it the first time and every single plug looked great porcelan had a nice tan color to it, ground strap had ust about zero heat to it, etc.etc. I probably could have used the #8 plugs and been fine, but I had to buy plugs anyway so I went a step colder for the first trip to be safe. Better to start safe then start off too hot and hurt something.
IMO a #6 plug is a good n/a plug for under 12 to 1 compression, over 12 to 1 I'd go #7 n/a, or any nitrous at all with under 12 I'd run a #7, over 13 to 1 I'd run a 7 or 8 n/a and an 8 or 9, or even a 10 with nitrous, dependign on what the compression/size of the shot is.
Staging Lane
Joined: Nov 2006
Posts: 76
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From: Central Jersey
I run 7's & spray a 250 shot . I gap them at .025. When i sprayed the second stage we put 8's in, same gap. You gottto make sure fuel & nos pressure are right., with timing pulled. Thats whats been working for me.
So we're saying a 200 shot is the ceiling for a TR6. What's the ceiling for a TR7?
I have a new set of all pros that don't accept acorn style plugs. I don't have the engine together, but what plugs would work in these heads that are comparable to a TR6/7/8 etc?
I have a new set of all pros that don't accept acorn style plugs. I don't have the engine together, but what plugs would work in these heads that are comparable to a TR6/7/8 etc?
Personally..... if you're gonna spray over 100 I'd go to a 7 for that safety net. I dunno why people try to push the envelope with stuff like spark plugs, They're so cheap and easy to change I will never understand.
stockish compression 100 shot #6, more then 100 #7. 12 to 1 compression and a 100 shot @7, more then a 100 shot #8, 13 to 1 compression #8 with a 100 shot, more then 100 shot #9, etc.etc. It's probably overkill safe, but again, for the 16 bucks or whatever a set of plugs cost, why not start cold, see what they look like and go from there?
stockish compression 100 shot #6, more then 100 #7. 12 to 1 compression and a 100 shot @7, more then a 100 shot #8, 13 to 1 compression #8 with a 100 shot, more then 100 shot #9, etc.etc. It's probably overkill safe, but again, for the 16 bucks or whatever a set of plugs cost, why not start cold, see what they look like and go from there?
