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Old 02-21-2014, 08:24 PM   #35
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Agreed, you can have the best amps and speakers in the world but distortion will kill it.
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Old 02-21-2014, 08:34 PM   #36
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Why don't you just ask your tuner what he's comfortable with if he says whatever call ngk (great company) they will answer all questions you have and give you the best option. I made the mistake of asking a spark plug question on here after a piss and moan match, just like this is turning into, and I just talked to my tuner we went with tr6 plugs runs perfect. Just don't waste your time on here you'll get a million answers for the million options.
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Old 02-21-2014, 08:44 PM   #37
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Quote:
Originally Posted by dan0617 View Post
So you were at 11 psi and 715 RWHP on -6 projected tip plugs? Pretty good chance they were turning into glow plugs and caused detonation. I would have used at least a 7 heat range, if the meth shot was small and/or the fuel was less than 93 octane I would have used an 8.

Another thing to add for anyone reading......a forged motor won't last any longer or hold any more power than the stock motor if the plugs are too hot. It creates detonation (preignition to be exact) that timing retard by the computer's knock sensor cannot help.
Im pretty sure they were -6 plugs but i doubt projected tips. I did not ask Dallas Performance at the time. I know i was not charged for new plugs. So i was at 11 psi with meth on a D1sc with 65# FAST injectors that were at 88% duty cycle on the dyno tune. I asked if ID1000s were better and was told the meth would compensate. I had a big question mark on that remark so i take responsibility for my stupidity. I also beat the living crap out of the motor and now have a new HKE built LSX 427 that is stupid.
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Old 02-21-2014, 09:54 PM   #38
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This is the result of the wrong plugs on with a boosted LS3....



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Old 02-21-2014, 10:00 PM   #39
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This is the result of the wrong plugs on with a boosted LS3....



I can weld that.
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Old 02-21-2014, 10:01 PM   #40
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I can weld that.

We tried.... Went with crazy glue instead..
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Old 02-21-2014, 10:03 PM   #41
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This is the result of the wrong plugs on with a boosted LS3....



That's a FN mess. Hate to see that.
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Old 02-21-2014, 11:32 PM   #42
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Little where's your pic?
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Old 02-21-2014, 11:33 PM   #43
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I just put tr7ix in based on my tuners recommendation. that pic above looks a lot like what happened to my first engine (stock)...don't need that again lol.
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Old 02-22-2014, 03:41 AM   #44
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This is the result of the wrong plugs on with a boosted LS3....



So that's the consensus that a spark plug did that?
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Old 02-22-2014, 08:01 AM   #45
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So that's the consensus that a spark plug did that?
This happened on a dyno. Things were controlled as far as air/fuel, timing, etc. The plugs were overlooked and it was the opinion of the tuner that the plugs caused detonation which caused the carnage.
It was a shop test car which was getting a new engine either way and they were just trying to see how much the LS3 could take.
Its a shame they overlooked proper plug selection and never really found out the limit of the stock engine, but $#@# happens.

I don't really get into spark plug discussions, because almost no one uses the plugs I do, or agrees with my choice. I use only Brisk Silver Tips. Silver is a better conductor and the main benefit is a silver tip will melt before getting hot enough to cause detonation. This is a fantastic safety feature of silver tips, as the pictures I posted shows.
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LME LS402 , WCCH 245 Heads, Pat G. Custom cam
YSI / 3.0 pulley, ARH 1 7/8 headers, NPP
Dewitts / dual spals, A&A dual pump fuel system.
3.42 polished gears, hardened shafts, Alky control meth, Cartech line lock, ECS axle loops, Trans brace, 6L80 built by me.
ID 1000 injectors, comp rockers, Morel lifters, BT springs, Trend 3/8 pushrods, ATI 10% OD Damper
Circle D Triple Disc stall
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Old 02-22-2014, 08:27 AM   #46
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Non projected tip plug like a B8EF for your power. If your tuner has issues tuning them then get a new tuner or run the 8iX iridium plugs.
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Old 02-22-2014, 08:28 AM   #47
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So on a forged ls3, 9.5:1 cr, 12-14lbs of boost on 93octane and methanol, I will be using br7.
Is this right?
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Old 02-22-2014, 09:04 AM   #48
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Originally Posted by thebeast916 View Post
So on a forged ls3, 9.5:1 cr, 12-14lbs of boost on 93octane and methanol, I will be using br7.
Is this right?
Yes good choice
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Old 02-22-2014, 09:16 AM   #49
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Looks to me it was just a mechanical failure. That also sucks and also happens.
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Old 02-22-2014, 11:19 AM   #50
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So what would be the difference at my power level between a BR7EF and a B8EFS? (Assuming my build will reach 800-850rwhp)
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Old 02-22-2014, 01:00 PM   #51
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NGK's gave me a low rpm light throttle miss after a couple hundred miles.

Brisk GR12S plugs worked good for me, would use them again but I wanted to try an iridium plug. At 13 psi and a 125 shot plug choice is critical. The Denso IT's have been perfect.

I'll sell you a set of Brisk GR12S plugs for $40 shipped if you want them. Have maybe 1000 miles on them at the most. They are gapped at .040, you would want to regap them to about .028 for your boost, or I can do that if you want. I was using them at lower boost, and then decided they were too cold so I went with a warmer plug. I then upped the boost and added spray and decided to go with cold Denso iridiums, so I don't need these anymore.

I also have a set of Denso IT-22's I'll sell for $60 shipped. Again, with nitrous and boost they worked but for safety I wanted to go another step colder so I don't need these anymore. Have maybe 500 miles on them.
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