INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

Hurt another 6.0??? what could it be now.

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Old Jun 17, 2012 | 07:06 AM
  #21  
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Originally Posted by Holty
Those look like NGK TR6 plugs which is what just about everyone is running.
Originally Posted by krambo
Agreed. At those boost levels and no juice, the plug choice isn't the issue (unless he is running a colder than T-R6 level).
Originally Posted by 03sierraslt
I ran TR6 plugs for 6yrs on boost, just recently switched to non projected. TR6's worked just fine for me and a bunch of other people. With that fuel setup I don't see how your injectors were not beyond maxed.
Originally Posted by shawnss
yes i have used these same plugs for 6 years also and haven't had a problem. as for the fuel system i do agree with you. i don't understand how it was fueling the motor for so long on 13psi. i will be changing that you as well. really im not shooting for a record truck just something to have fun with. im planning on over building it this time. id really just like a mid 11's with the truck then im done.
Listen here fellas. Boost/N2O = higher cylinder pressure

Higher cylinder pressure is more prone to pre-detonation. Even if the TR6 has worked fine for you doesn't mean that it's the right plug for your application. A projected tip plug's ground strap and electrode are sticking out of the combustion chamber, getting hot from the supercharged combustion. At low boost/N2O levels the projected tip plug can be tuned around. I recommend a non-projected plug in the proper heat range for N2O and boost. I also suggest reading your plugs. The timing mark is very easy to read to get timing dialed in.

Originally Posted by shawnss
heres a quick video i took. you can see how much it smokes with no load on the motor and just dry rev it.
MVI_0496.mp4 video by shawnss_photo - Photobucket
Ringland/broken piston from detonation
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Old Jun 17, 2012 | 09:46 AM
  #22  
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Originally Posted by 02 BLK WS6
Listen here fellas. Boost/N2O = higher cylinder pressure

Higher cylinder pressure is more prone to pre-detonation. Even if the TR6 has worked fine for you doesn't mean that it's the right plug for your application. A projected tip plug's ground strap and electrode are sticking out of the combustion chamber, getting hot from the supercharged combustion. At low boost/N2O levels the projected tip plug can be tuned around. I recommend a non-projected plug in the proper heat range for N2O and boost. I also suggest reading your plugs. The timing mark is very easy to read to get timing dialed in.



Ringland/broken piston from detonation
yeah i was kind of thinking it was the ringland. i know on these pistons that is a weak area. but heck what piston would like detonation. i know some take it better than a cast piston. but it's still not good on any engine.
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Old Jun 17, 2012 | 03:44 PM
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Just think about the combustion chamber. Any sharp protruding object = hot spot. Hot spot = detonation. Detonation = the end

A non projected plug is another safety measure against detonation. It's one less thing that could cause a problem.

I ran NGK BR7EF in my H/C stock bottom ended LS1 and didn't have any performance or fouling issues toodling around town n/a.

YOU CAN LEAD A HORSE TO WATER BUT YOU CAN'T MAKE HIM DRINK.
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Old Jun 17, 2012 | 07:34 PM
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Was the 65 wet or dry? You could fatten up the jets if it was wet to get decent A/F ratio...
Might make the tune look decent on the plug, IDK...
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Old Jun 17, 2012 | 08:57 PM
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Originally Posted by MPFD
Was the 65 wet or dry? You could fatten up the jets if it was wet to get decent A/F ratio...
Might make the tune look decent on the plug, IDK...
It was a 65 wet. fuel was half 105 and half 91 pump. it was my last motor that i sprayed not this one. but it was on the same injectors and coils.
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Old Jun 17, 2012 | 10:10 PM
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Originally Posted by 02 BLK WS6
Just think about the combustion chamber. Any sharp protruding object = hot spot. Hot spot = detonation. Detonation = the end

A non projected plug is another safety measure against detonation. It's one less thing that could cause a problem.

I ran NGK BR7EF in my H/C stock bottom ended LS1 and didn't have any performance or fouling issues toodling around town n/a.

YOU CAN LEAD A HORSE TO WATER BUT YOU CAN'T MAKE HIM DRINK.
amen brutha, , i run BR7EFs in my 408 simply for the reasons you explained, the plugs work well and its a nitrous fed setup but been running them NA, as the nitrous levels goes up so will the spark plugs
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Old Jul 3, 2012 | 02:02 AM
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I highly agree with Nathan.. Also if you have that much money dumped into a boosted LS motor why would you go with a mail order tune... A boosted motor is only going to be as good as the Tune along with maintenance.... That color of smoke looks as if your burned a ring and is getting blow by....
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Old Jul 3, 2012 | 02:10 PM
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Originally Posted by rpg020390
I highly agree with Nathan.. Also if you have that much money dumped into a boosted LS motor why would you go with a mail order tune... A boosted motor is only going to be as good as the Tune along with maintenance.... That color of smoke looks as if your burned a ring and is getting blow by....
Here's the wthing where I live you cant just get a local tuner to do a live tune. I live in Montana so boosted truck just aren't around heck boost LS motor aren't even big around here. So mail order tunes are about the best I can do.
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Old Jul 3, 2012 | 03:32 PM
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Originally Posted by shawnss
I know its crazy it lived so long. Here's the real kicker is I have got the most miles on the motor that I was running 13psi on. The motor I ran 9psi on didn't even come close to living as long. Unless so how I have bigger injectors than I think but my paper work says 42# are what I have. What is your setup now and what are you running for injectors?
I was runnin the 60mm STS kit on 6psi on a stock LQ4 and injectors were up around 85% with 8.1 Marine injectors.. 43.8# at 58psi.
went up to 75# and ran up to 9-10psi and they werent even close to 60%.

im runnin stock 24# or what ever they are.. ha, 105% at 6200 with a baby cam in the LQ4
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Old Jul 5, 2012 | 07:24 PM
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Originally Posted by shawnss
Here's the wthing where I live you cant just get a local tuner to do a live tune. I live in Montana so boosted truck just aren't around heck boost LS motor aren't even big around here. So mail order tunes are about the best I can do.


I hear you there. I cant even find a machine shop Id trust to clean up a motor, and talking about tuning just makes everybody ask me what carb I run, and why would I want all that computer crap when i tell them about efi live and hptuners.
Finding a dyno is also impossible. I've never been able to find a chassis dyno in the state.
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