When we torqued to 85ft the copper never seated into the o ring reciver groove after it was ran like that at the track we pushed water like crazy with very little nos.We took the heads off at that point and noticed they were loose like they were trying to still seat.and we did do the retorque at 85ft.I think the gasket were hurt at that point.When we took took the gaskets to 100ft we noticed how much better the copper seated you could feel just by torquing down that is what the cooper needed.We will see on the new set going in tonight and hit the track this weekend if that was a problem.I just think you need high torque just for copper o ring reciver groove setups because your trying to crush the the copper into the groove.

 

I would start at 12* and work your way up.

Are you using a progressor? or spraying it all right out of the hole?

 

Thats what i was thinking.

 

What shot is it and how much hp to the wheels? i thought i red somware 250 to the wheels but i couldn't find it.

 

Heavily coat the gaskets in hylomar. Then procede to Tq and Loosen those gaskets 4-5 times. Yes Copper gaskets need alot more TQ to deform around the wire lock. At least 85-90 lb ft. I would suggest the Loosen and Re TQ scheme 4-5 times and make sevral final TQ checking passes. Mind you use lots of Moly lube on the headstud threads.

 

We just got back from the track and we set timing at 14 degrees all was going good mine you the car was more lazy with the timing out.We then started to pill it up thinking leave timing out and creep up with the tuneup.As soon as we pilled up to a 33 we then pushed water about half gallon.I know this is not right and maybe the gaskets are to thin (40 tho) heads went through the normal heat cycle and were retorqued.This pushing water is getting old and we are not going to make any more power if we can't keep the heads on the motor.

 

Is it time for a bigblock yeat!!!I know if we can keep the heads down we wil be able to run with some of the 500+ cube guys without a problem.If i bulid a new motor i will be going through W2W and it will be a world block but before i bulid that i want to know if im going to limit myself again to a motor that will have the same problem.I love the LSX motors but if i can't make power due to pushing water then this setup is pretty useless.

 

Wish I could help but I dont have any experience with copper gaskets.

Did you try the hylomar like LS1curious said? I've heard good stuff about it.

 

what heads are you using ?

 

Pretty sure he has ETP's

 

Your correct.BTW i talked to kurt from W2W and he said there is not much i can do.Nitrous cars are just so violent that it's really hard to keed the heads down plus my motor is 13.5.1 compression so cylinder pressure is very high on the bottle.I was thinking of buliding a custom Reservoir like the new cars have so that when you bulid coolent pressure it would have room to expaned vs right now it just pushed water out because ther is no room.I think what we want to bulid will work and it will keep the water in the motor.The only thing we don't know is how many times can a head be lifted before you have a gasket failure.

 

Tq the sutds up to like 105 lb ft.

Those heads can take it and as long as the block is Iron it'll take it.

 

Thats were there at and still no luck.

 

I think you hit the nail on the head if the gaskets are protruding into the chamber. That would almost certainly cause a hot spot at the gasket edge which would cause detonation.

 

I thought so to so we went to a 4.100 gasket and it fit very nice.We thought we had the problem solved till we put a bigger tune in 33 jet on D/P and then we started to push water again.I figure are tune would be able to go to about a 40 jet before i would draw the line but were so far off from that and i know a 33 is not huge for a 408 cube motor.BTW i ran a 36 jet in my D/P in my little 346 but i did not have the compression that i have now also.I think im going just to go to a huge catch can and pill it till the heads pop off!!!

 

Are you running 11mm or 1/2 studs ? The other thing you may want to do is grab some pictures of the plugs and the old gaskets and post them up here. I would love to have a look see.

Also did you Tq and loosen the heads sevral times before final TQ ?

 

Thats what i was told also..... N2O is violent.....
I know im a boosted car.... but i would lift the heads and push that much also....... heads would lift 6-7 times and finally blow the gasket.... not o-ringed though....
Like i said above im in the process of doing it now.... looks like you talked me into 1/2" studs....

Kyle

 

I talked to kurt at W2W and he thought the clamping force would have been good with the l19.I don't think going with a 1/2 stud would be the answer.He feels that nos are just that mush more harder on things and there is not much i can really do.

 

Ill see what i can do.

 

That sucks man.......

Well either BBC time or LSX... id say wait and see what some do with the LSX stuff with the 6 bolt heads and you have almost all the parts except the heads and some bolts.........

Kyle