I be danged if I wouldn't have the heads and block both surfaced too.
Head gaskets only last a year...
- Thread starter RockinRobin
- Start date
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skrews
Well-Known Member
Spray the Commetics with Hylomar spray before install.
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Alfajim
Well-Known Member
Once upon a time in the back days there was a stop leak that had a brown oily fluid with a bunch of pellets of material that was also a dissimilar metal neutralizer. It was used by Jaguar in all their engines from the factory it really worked and stopped the corrosion because of iron blocks, aluminum heads and steel gaskets. I can't for the life of me remember the name but it was available at NAPA and other parts houses.
Jim O
Jim O
TT5.9mag
Two atmospheres are better than one
Fire rings shouldn’t be necessary at 13:1 on race gas. The cometics will hopefully help as well as the studs but I have to ask, are you seeing any detonation on the plugs or tops of the pistons? That will kill head gaskets quickly.
Muti layer gasket is my thought the expansion and contraction rate of alloy is cast is making the gasket ware out
I'd do it anyway, especially if he decides to have the block and heads surfaced.
Bars Leaks. It's still sold.
Alfajim
Well-Known Member
Yeah that's it it really works for stopping the electrolysis created by the dissimilar metals, we also found to never use red anti freeze only the Prestone as it had a much better anti corrosion package and with the red it would eat under the hose connections and you could see red crystals at the edge of the hoses.
I've seen that with the red too.
RockinRobin
Well-Known Member
Not the problem. Thanks for asking. 26 degrees total timing. (Gen3 hemi)
RockinRobin
Well-Known Member
Drag race only motor. No anti freeze. Just water and water wetter.
TT5.9mag
Two atmospheres are better than one
Then why is it knocking the gaskets out of it? Is the timing locked at 26? Or does it come in very quickly? Do you change the timing when track conditions change?
We run Bars Leak in all our SS cars
no matter which heads.
Also our Stock Eliminator cars with Aluminum
heads.
no matter which heads.
Also our Stock Eliminator cars with Aluminum
heads.
You’re correct in how good that style works. When I was a youngen there was an old timer (born in 1918) mechanic in town that used to buy those and only use the oil/ fluid in the bottle but not the pellets. He said that it was and excellent water pump bearing lubricant- claimed it could double the life of the water pump.
RockinRobin
Well-Known Member
It comes in pretty quick. 26 is what it likes in cold conditions. I don't advance it this time of year, I just let it run a little slower. It's a bracket car so the E.T. doesn't matter.
TT5.9mag
Two atmospheres are better than one
I definitely wouldn’t advance it, I’m suggesting it’s already got either too much, or it comes in too quick when certain conditions present themselves. You need to look very closely at what the timing is at peak torque.
RockinRobin
Well-Known Member
How long do those builds last for you?
I freshen the heads every 50 runs or a bit more.
Try to check the bearings every year if raised a lot.
Re ring the engines around 250 runs or when leak down
tells us to do so if sooner.
It is a constant battle and cost us a small fortune as we race 11 Mopars,
plus a couple Jr. Dragsters in our family plus support the racing of several
of our friends race cars.
RockinRobin
Well-Known Member
I'd like to get 250 passes out of the build and then do rings, bearings, valve job/springs and cam/lifters/etc as needed. This will be 1st time using Cometic head gaskets. Have used FelPro in the past with unsatisfactory results.
If you have aggressive camshaft you may well see a significant drop off (Tenth or Two)
going that distance on the springs and valve job.
You will like the Cometics = Research their suggestions on block and head finish.
I run cometic head gaskets @ 12.9:1 with a surface cometic would say "not going to work".
I spray my head gaskets with 4 or 5 coats of copper coat and haven't had any issues with a ra of probably 75 (catch a fingernail on the surface). Cometic wants below 50 ra
RockinRobin
Well-Known Member
Aluminum heads? multilayer gaskets?
Yes trickflows & cometic, big block though with studs.
RockinRobin
Well-Known Member
How many passes would you say you get in a year?
Our Stock and Superstockers are around 100 to 120 a year.
Our bracket stuff around 70 to 75.
The biggest worry for us is Valve Springs going away or breaking.
Our bracket stuff around 70 to 75.
The biggest worry for us is Valve Springs going away or breaking.
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