Spark plug gapping

lemons12 · 10-05-2009, 02:32 AM

I was an idiot and didn't check before I started and did it at a buddies house without the net.. We kinda winged it and took a guess..

I gapped them at 32.. They are NGK Tr-6s. I will be spraying a 75-175 shot.

Will I be ok or do I need to take them out and change the gap?

streetassasin · 10-05-2009, 10:26 AM

that gap is fine but I wouldnt run those plugs with the big shot, I picked up some br7ef's for my h/c 150 shot car

kinglt-1 · 10-05-2009, 12:18 PM

I was told to leave the tr6 at the factory .038 gap and switch to a br7 if I spray over 125 shot.

slammin86 · 10-05-2009, 12:28 PM

Go with br7.

w3s1c0a5t · 10-05-2009, 02:15 PM

br7's are what i went to. At a .32 gap.

JL ws-6 · 10-05-2009, 03:05 PM

I gap all my plugs at 35, always have. #7 for anything more then a 50 shot on a h/c car IMO.

lemons12 · 10-05-2009, 06:22 PM

Damn it.. I have always heard Tr6s will be fine on a H/C ls1 with anything up to a 200 shot..

Can I pick up a set of the Br7s at autozone (anybody got a price estimate/part number)..

bigboy576103 · 10-05-2009, 08:01 PM

ok yall say those are good for h/c engines what bout engines around 10.1ish on a 150-250+ would yall recogmend the br7's? and what gapping?

streetassasin · 10-05-2009, 08:19 PM

They're about the same price as tr-6's. I got mine from speedinc part # 3346

lemons12 · 10-05-2009, 10:05 PM

Quote:

Originally Posted by streetassasin

They're about the same price as tr-6's. I got mine from speedinc part # 3346

Thanks man! Will put my order in now!

streetassasin · 10-05-2009, 11:16 PM

Quote:

Originally Posted by lemons12

Thanks man! Will put my order in now!

no prob, they didnt have them on their site but when I called they had em in stock

jerflash · 10-10-2009, 02:22 PM

i have been running tr6 plugs for years gaped to 35. im shooting a 150 dry on a cam only car putting down over 500...no problems...should i switch to a br7 or you think im good?

oh an my comp ratio is lower then stock at like 9.7 to 1

Sofls1 · 10-10-2009, 05:51 PM

Quote:

Originally Posted by lemons12

I was an idiot and didn't check before I started and did it at a buddies house without the net.. We kinda winged it and took a guess..

I gapped them at 32.. They are NGK Tr-6s. I will be spraying a 75-175 shot.

Will I be ok or do I need to take them out and change the gap?

I run the TR6's as well gapped @ .031 works just fine for me on a wet 150 shot.

JL ws-6 · 10-10-2009, 05:56 PM

Quote:

Originally Posted by jerflash

i have been running tr6 plugs for years gaped to 35. im shooting a 150 dry on a cam only car putting down over 500...no problems...should i switch to a br7 or you think im good?

oh an my comp ratio is lower then stock at like 9.7 to 1

With your motor and the pistons that are in it you are probably o.k. with a #6, but I always air on the side of caution.

Get some heads on that thing to bump the compression back in the high 11 range and between the compression and the heads, probably pick up 60 rwhp.

jerflash · 10-11-2009, 01:53 AM

ya i know man...im running completly stock heads with forged dimond flat tops with the -2cc valve reliefs and im running a stock mls gasket instead...when i got my motor back together i just wanted it to run lol

even with a 60cc head and a .40 cometic im only at 11 to 1

JL ws-6 · 10-11-2009, 09:06 AM

So.... get a set of 55 cc heads and be done with it!

sleeperstyle · 10-11-2009, 09:36 AM

been running tr6's @ .32 for years now, 150whp shot.

BOLO · 10-11-2009, 10:39 AM

Not to jump the thread, but, is there a difference in performance running n/a with the colder plugs(tr7's) vs. tr6's? I also have a 150shot.

jerflash · 10-11-2009, 10:49 AM

well with the tr6 i do notice that cold starts when its cold outside do suck just a little more lol