for people using NGK Br7's
 

I was wondering how many people were using these? I see Lightninrod is. What are your mods and how are they working for you. I'm using the TR-5's right now w/ a #4 but I'm going to move to a different plug soon. I'm wondering if anyone using these are experiencing any plug foul while using on the street. Any help is appreciated. I dont want change the plugs anymore for awhile after this next time so I want to get it right. Thanks, Mike

I have a 4# and drive my L daily. I put 40 miles on the plugs then I pulled them for the TR-5's. I had a bad miss at idle and 2k rpm. I did not like them at all. The 5's idle and drive much much better. This is on my L....your's might be different.

I can't really complain about my 5's either right now but I'm going a little more aggresive soon so I dont want to take a chance.

Check Sig For Mods
 

One thing I did notice was a little loss in throttle response over the stock plugs with the BR7's, but they work very well at the track. I gapped mine at .44 to try and reduce any fouling because my truck is a daily driver. I haven't pulled them out to inspect them yet, but drivability hasn't changed since I put them in. I'll pull a few of them tomorrow for inspection and post some pics.

Hey ASVTFordboy, You are running some killer times with the same mods as me. I see the only difference is the PSP chip. I guess the times are w/ a race program. I have a 4 program chip coming from PSP too. I just hope I can pull some times like yours.

I mainly went with the 4-way because of the options it had, but it has worked beyond my expectations!! I will probably be running nitrous before long so I will be able to add that program to my chip and still have the street and race programs. The 12.26 was on the race program. My best time so far on the street program is a 12.35. I was hoping for a few 11's while the weather was still good, but it warms up quick down here. :(

I'm sure you will like the PSP chip. :D

I've had then in now for about a month--driving to work and back and a few passes down the strip. I do get slight(?) fouling/missing around town but it's not too bad. I shift out of O/D when driving at 40 mph or less. They've worked flawlessly at the strip. They're gapped at .040 but if I had it to do all over again, I think I would follow ASVTFordBoy and increase the gap.

I have a 5 lb pulley and had no discernable detonation but I got 'scared' and made the change to a very 'cold' plug--not sure, but the TR 6s might have done a little less fouling and still been safe.

Dan

I've had the BR7's in my truck for awhile now and there great, they do seem a little slugish compared to the tr6's while driving on the street, but when I jump on it they pull just as good with the juice.

I'm running the PSP 4lb lower pulley, 2lb upper pulley and a 50 shot of juice at the track. I haven't got any times yet, but thats due to the broke tranny, HEHEHHEHE.

Other mods are, full bassani exhaust, 90 milimeter mass air, psp 4 way chip, custom made cold air induction, single blade throttle body, PSP electric fan kit, and thats about it. FOR NOW!


coming soon:
long tubes by kooks.
rebuilt factory tech monster box and PI converter.
16"x28" hoosier slicks too.

Look for 11's and a blown motor. :D HEHEHEHEHEHE. atleast the tranny will hold up though.

I use them also, .042 and don't see any advantage over my TR6's gapped the same. But I have not pulled and checked them either. With all my mod's and spraying now and then my tuner has advised me to run them, so I do.

I've been running the BR7s for some time now, and while I though there might be a possibility of fouling in very cold air, so far nobody is fouling them, including myself. They definately don't idle as smooth as Densos or TR6s, but people have to understand that you can't have the best of both worlds here. If you want to run +4 psi or a decent nitrous shot, you need a better plug to transfer the heat to the head faster. Plenty of people have been burning up Densos and TR6s with +4 and up pounds of boost. The reason is not just the boost, but the aggressive chips people run. And since not many are willing to sacrifice power, then you need a better plug to get rid of the extra heat created by higher boost, more timing, and leaner mixtures.

IMHO the reason that these things need such a cold plug is the fact that there is only about 4 threads holding onto the plug.

This makes it hard for the heat to get out of the plug and into the cylinder head.

These engines really shouldn't need a plug that cold, but by design I don't think the heat can't get out of the plugs the way it should. Dale

Thanks for the replies. That helps me out alot. I'm going to be running the 4 program chip with a #4 pulley and a shot of nitrous. After reading this I think that I'll go with them. The other programs are going to be for mileage, street, and race gas.

Sal,

Nobody has posted about burning up Denso's. Is that a typo or what?

Chuck, that's not a typo. I've sold a lot of BR7s to people killing Densos. Mostly trucks over +4 psi, that's why I suggest the BR7s for that application. I have also killed Densos with the 150 shot of spray. They worked very well with the 100 shot, but the 150 shot killed a few. The Densos are AWESOME for curing misses, but they are still too hot for large nitrous shots and over +4 psi.

Would you post if your $90 plugs "burnt up"? :rolleyes: