NGK TR6's and 75 shot
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From: Howell & Fenton MI
NGK TR6's and 75 shot As some of you may know I have a complete NX wet kit which is installed and ready to go. Here is my dilemma: Money is tight right now, so i'm looking to just spray a 75 shot right now without changing the timing, and running my NGK TR6 plugs (gapped at 0.040). So basically changing nothing...thus costing me nothing lol! I'll throw the car on the dyno to check air/fuel, and the car is tuned for the HCI combo of course, but that's it. Now i've searched the forums here, called a couple places, and am getting mixed opinions. One person or thread says sure no problem at all, and another says nope...not a good idea. The tech guy at NGK says no good, but NX says no problem lol. So bottom line guys....can this be safely done? I know these plugs are not ideal for nitrous (I totally get that) but see several people doing it...especially on a small 75 shot. So what do you all think?
Oh and one other thing that might be worth mentioning...my compression is around 11 to 1 vs the stock 10 to 1. Not sure if that is relevant, but thought i'd throw that in there just in case
Oh and one other thing that might be worth mentioning...my compression is around 11 to 1 vs the stock 10 to 1. Not sure if that is relevant, but thought i'd throw that in there just in case
Last edited by HCI2000SS; Feb 20, 2013 at 07:54 PM.
That used to be "the" nitrous plug until the non-projected ones became popular. Nowadays I would recommend NGK BR6EF plugs. Can you run the TR6 on a small shot? Probably, if you pull a couple degrees timing. Have I done it? Yes, before I knew any better. Do I recommend it? No.
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From: Howell & Fenton MI
That used to be "the" nitrous plug until the non-projected ones became popular. Nowadays I would recommend NGK BR6EF plugs. Can you run the TR6 on a small shot? Probably, if you pull a couple degrees timing. Have I done it? Yes, before I knew any better. Do I recommend it? No.
I ran a 75 dry shot at the time and I ran the setup for a couple years, only spraying at the track. That said, I had a nitrous tune with 3 degrees timing pulled when I sprayed. I believe I gapped about .040" or so. I run .035" gap now with NGK BR7EF (but I'm also running a 150 wet shot). Seriously, plugs are not that expensive.
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From: Howell & Fenton MI
Yeah I know the plugs are cheap, but I was hoping to just leave it as is and go lol Have you ever changed plugs in these cars before? I am new to the LS world (came from the Mustang world) and to change the plugs in this car looks like a real pita lol
Have you ever changed plugs in these cars before? I am new to the LS world (came from the Mustang world) and to change the plugs in this car looks like a real pita lol 
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From: olympia, wash
I ran TR6 plugs for quite a while on a Zex nitrous kit. Ran about 22 bottles thru on a 75 shot, no problem's at all. BUT, you have heads and cam, so I am betting your timing has been advanced some. So I would say don't do it. The NX guy said you could? Wow. Maybe he didn't hear you say that you have heads/cam in your ride. I can't imagine them saying that it's ok to smack it even with a smaller shot.
I know your on a budget, but if you hurt your engine where will that leave you?
I know your on a budget, but if you hurt your engine where will that leave you?
Yeah, I've pulled the plugs out many times. It's not all that hard, although it is a little tight quarters. I have a GTO, so the back of the engine doesn't run up under the cowl like the F-bodies do.
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From: Howell & Fenton MI
I appreciate the info guys! Well I just talked to my tuner (he has never let me down in the last 8 years) and he says with my build I will be fine. He has done countless LS1's, Mustang's, etc...and has a great reputation! I will verify the timing though, and if it's significantly advanced I will change them, but if it isn't I think i'm going to keep it as is for a bit. I'll keep you guys posted 
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From: WA
seems like for such a cheap item like a spark plug and you can use either with one being slightly "safer" I am not understanding why take the chance?
Just removed the TR6's out of mine and put in the BR7EF's seems to run the same as before but I have a piece of mind. Recommended by a good tuner as well.
Just removed the TR6's out of mine and put in the BR7EF's seems to run the same as before but I have a piece of mind. Recommended by a good tuner as well.
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From: Howell & Fenton MI
I don't want to sound stupid here, but if the TR6's were a decent nitrous plug back in the day, then how can they possibly be all that bad...especially on a 75 shot? I mean I get that there are better plugs, and my timing comes into play here, but if the timing isn't too advanced why would this be a problem? I know it's a projected tip plug, but it is one step colder and they are a copper tip plug as well correct? I'm just trying to find some "real world" reasons as to why this is such a bad idea here. Also would switching to something like BR7EF's affect my n/a performance....even in the slightest? Thanks again guys!
i have the same heads as you and use br7ef plugs..doesnt affect N/A at all..on a 100 shot and pull 4deg with harris interface..if idid do a 75 (which i considered at first) id pull bout 3deg...normall rule of thumb is 2 deg for every 50..you could get away with 2 deg pulled...either way id pull timing
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From: olympia, wash
I don't want to sound stupid here, but if the TR6's were a decent nitrous plug back in the day, then how can they possibly be all that bad...especially on a 75 shot? I mean I get that there are better plugs, and my timing comes into play here, but if the timing isn't too advanced why would this be a problem? I know it's a projected tip plug, but it is one step colder and they are a copper tip plug as well correct? I'm just trying to find some "real world" reasons as to why this is such a bad idea here. Also would switching to something like BR7EF's affect my n/a performance....even in the slightest? Thanks again guys!
TR6 plugs were the recomended nitrous plug for years untill fairly recently when it was found that the non-projected tip plugs were safer.
BUT, TR6's are perfectly fine, if your timing is reduced accordingly to the size shot you plan to run, up to 125rwhp shot. Some ran TR6's with a 150+ shot w/o problem, but thats running on the ragged edge.
No way I would do that.
But for a 75 shot, like what you want to use, TR6 plugs are fine, so long as your timing is good.
Now, expect to be raked over the coals on this, [once this post gets moved to the nitrous section], but as I said earlier, I ran the TR6 plugs for years on a 75 shot. Most everybody did.
But the "pack mentality" that accompanys a lot of threads on this subject, would have you believe that if you use those plugs, your engine will blow a 8 ft deep crater beneath your car and send debris skyward knocking passenger jets out of the air, lol.
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From: Howell & Fenton MI
Your not sounding stupid at all.
TR6 plugs were the recomended nitrous plug for years untill fairly recently when it was found that the non-projected tip plugs were safer.
BUT, TR6's are perfectly fine, if your timing is reduced accordingly to the size shot you plan to run, up to 125rwhp shot. Some ran TR6's with a 150+ shot w/o problem, but thats running on the ragged edge.
No way I would do that.
But for a 75 shot, like what you want to use, TR6 plugs are fine, so long as your timing is good.
Now, expect to be raked over the coals on this, [once this post gets moved to the nitrous section], but as I said earlier, I ran the TR6 plugs for years on a 75 shot. Most everybody did.
But the "pack mentality" that accompanys a lot of threads on this subject, would have you believe that if you use those plugs, your engine will blow a 8 ft deep crater beneath your car and send debris skyward knocking passenger jets out of the air, lol.
TR6 plugs were the recomended nitrous plug for years untill fairly recently when it was found that the non-projected tip plugs were safer.
BUT, TR6's are perfectly fine, if your timing is reduced accordingly to the size shot you plan to run, up to 125rwhp shot. Some ran TR6's with a 150+ shot w/o problem, but thats running on the ragged edge.
No way I would do that.
But for a 75 shot, like what you want to use, TR6 plugs are fine, so long as your timing is good.
Now, expect to be raked over the coals on this, [once this post gets moved to the nitrous section], but as I said earlier, I ran the TR6 plugs for years on a 75 shot. Most everybody did.
But the "pack mentality" that accompanys a lot of threads on this subject, would have you believe that if you use those plugs, your engine will blow a 8 ft deep crater beneath your car and send debris skyward knocking passenger jets out of the air, lol.
I don't want to sound stupid here, but if the TR6's were a decent nitrous plug back in the day, then how can they possibly be all that bad...especially on a 75 shot? I mean I get that there are better plugs, and my timing comes into play here, but if the timing isn't too advanced why would this be a problem? I know it's a projected tip plug, but it is one step colder and they are a copper tip plug as well correct? I'm just trying to find some "real world" reasons as to why this is such a bad idea here. Also would switching to something like BR7EF's affect my n/a performance....even in the slightest? Thanks again guys!
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From: Howell & Fenton MI
That's really good to know! A 200 shot on those plugs is huge from what I understand, so again I can't see why a 75 shot should be a problem at all if my timing isn't like crazy advanced or anything.
