Like i said... is it possible ??

Guruz pleas tell me what do you think pleas.

 

Well the heat range stays the same as the plug is already rated the gap of the plug is more about creating more or less resistance on the ignition system as cylinder pressures increase so does the amount of energy required to jump the spark across the electode etc... I don't think it would cause the heads to lift and you push water, but if it developed a miss or something during a pull it might cause it to lift the heads. But these are extreme cases so if you were on the edge I'm guessing you needed a colder plug to begin with. But I don't think it was the cause itself, but adding to the problem. What plugs are you running and whats the gap?

 

It was v-power ngk 8 with the box gap .35 i think? and i changed it to ngk be8 box gap @.25.

Thanks for helping .

 

I run the NGK 8's as well I gap them @.32-.28 and I have also ran them out of the box at .35 never lifted a head with them like that, but thats just one person's experience, but if its working for you thats good, but you might try some NGK 10's and see how they act for a test.

 

The car made 813.11 whp std on 12.6 psi and 16° of timing on 91 octane , now i added methanol m1 100% m10 dual nozelle and hit 18 psi and steped down 2 degree of timing and kabooooom it' s pushing the water so that is my story .

Thank you for your help inspector12.

 

Maybe it was just time to blow up.

What build ? head gaskets, studs ? torque etc ?

 

Tightening the gap with no other changes should reduce the resistance quite a bit, and allow the plug to fire quicker, by a very small margin. If you were right on the edge and the change ended up producing the spark .5* earlier it could be all that was needed for light knock and head lifting

 

I don't think it would be that much of a difference, but I'm just going off of my experiences so if you've had that happen before etc... Then I guess its possible.

 

It's 408 lq9 the heads are afr 225 and the c/r is 9.3 with cometic .51 (i just received the ls9 gasket) i am going to tear down the heads within tow or three days and will see what happend down there.
I think i am going to gap the plugs to .28-.30 .

Thank you guyz for the information sharing

 

Assuming you're using arp studs and torqued correctly, you shouldn't really be having problems.

 

Let me highlight your problems for you

 

Yes its arp studs tq is 85.

 

In your op where do you think i went wrong ?

Thank you

 

Tightening the gap with no other changes should reduce the resistance quite a bit, and allow the plug to fire quicker, by a very small margin.

 

Then you go with grr on what he said.

 

It detonated, assuming your tune wasn't completely whack, I'd bet money it wouldn't have happened if you didn't have the meth and you had good fuel in it.

 

Im confused, you say that you made no other changes except plug gap in one post. But here you say you went from 12 to 18 psi and it went pop.

 

Bc i had a over boost b4 the new plugs without pushing water i just noticed a few kr in the log but you must notice that the peak timing was stepd down to 14° and there 100% meth and afr was average 10.9 with 18 psi so the 91 octane + dual nozelle m10 should bring at least 100 octane and for this level of octane i think 14° of timing is not aggressive .

 

important note ( i had 2 pulls with same timing and boost level one before and one after the plugs changed) and that the reason i want to record this case so i can learn if there's somthing that i must know and let others know too.

thanks guyz

 

Just curious, what were your intake air temps when it pushed water? The reason I am asking is that I learned the hard way that injecting a lot of meth with iat temps under 70f would lead to improper meth distribution and random combustion from cylinder pressure. A little hard on heads/rotating assembly and pushed a lot of coolant out, even with no knock and a safer tune with xfi.
Just a thought.