Super Jet 61x sleeves dropping = blown o-rings

[SUPERTUNE]

thanks for the all the info guys, i measured with my tools the best i could and my domes are reading 0.501 and the shell is reading .502 on spot i am blowing out and the opposite side is 0.499. the shell is at least 5 seasons old now. Great direction on the problem solving as well as the specs to check against. Is there any better heads out then the ada or is this still the best one piece shell out there.

None that are popular as the ADA, Just get a new one and happy riding for another 5 seasons...
Make sure the engine doesn't have any detonation or pinging, this WILL put you right back to where your are now real fast.

 

[kevbo]

So how did ADA get so popular with such a flawed design?

 

[chriselmore_1]

check out the new 1piece shell kommander head. I'm gonna order one now that they are back from surf slam

 

[SUPERTUNE]

So how did ADA get so popular with such a flawed design?

Well because in the early days of modified class racing, a lot of engine tweeking was going on and a lot of 5-6mm stroker cranks being used and ADA was the only removable dome head that was a 1/2 thick unlike all the others that were half that.
As we started cutting domes for strokers in all of the other brands they cracked in a matter of a couple of races, so more and more racers used the ADA heads and didn't see the cracking failure.
I wouldn't call it a design flaw, we just push the limits with compression in this market and the fuel company's just keep making worse fuel every year and we suffer with detonation issues trying to get all we can with making power.
Back in the old days running race gas or 50/50 mix because it was a lot cheaper ($4.00 gal), we never really had a lot of problems with detonation like what we see today.
The great thing I see now we have some more affordable choices with programmable CDI's like the EPIC and Flame TL, this will save our engines if we use it to it's full potential provided the they don't have any problems long term like we had with Advents for us.

 

[SUPERTUNE]

What is that in my post?

well, now it's gone...it was a big block the said TEST

 

[chriselmore_1]

what don't you like about advent

 

[SUPERTUNE]

Buy ten of them and see how many you have problems with...

 

[aramis]

The test block is back in your last post...I bet it's due to the sites ad server somehow. It links to d1.open.org

 

[2XLR8]

As most people know they are now stamping the production dates on the shells. There are many people that have 10 year old heads that are still working good. It would not be fair for a cylinder head to have been e bay'ed a few times and having the 4th owner demanding warranty for a head that is 10 years old and expect a brand new one. One thing you see is that the ADA head is being sold at a big discount by some dealers. This makes the ADA head a good choice for the price.

 

[kevbo]

Is there an engine "package" common enough for someone like ADA to mfg a one piece girdle head that uses an OEM 760 gasket and a simple water jacket cover? Maybe my solution is to make girdle that fits over a modfied OEM head thats been cut for the application.

 

[MADMAT]

FWIW surfersmurf recently had to get get a new head for the same problem.....his old one (not a ADA) was warped and he kept blowing O rings.

 

[Watcon]

Buy a Kommander or Pro-tec head.... Problem solved!!
Remember::: Quality is priceless:::

 

[D-Roc]

do you guys think that having a head shell that accepts a gasket inbetween the dome and shell to keep the metal to metal surface from going out of spec, would be a good design? then if you start blowing or-ring we could just order a new set of gaskets instead of the entire shell?

 

[SUPERTUNE]

Basically your describing a stock head gasket.
No o-rings required, the metal folded ring around the combustion chamber is what gives you the extra crush on the sealing surface on the sleeve around the combustion chamber.

 

[D-Roc]

the gasket would be installed on top of the dome inbetween the head shell to give us the 0.003 interference to crush the dome down. not between the dome and the cylinder like a typical head gasket. you following me?

 

[chriselmore_1]

maybe just a bit of 1211 on the top of the dome would keep it from moving a bit? That's why I like the 2 piece shells. If for some reason I was to get a bit of wear I could just have the top half of my blowsion head deckedfor 20$ or so

 

[D-Roc]

i thought about smearing a thin thin amount of jbweld on top and torque while it is still wet. i would much prefer to just throw in a thin metal gasket to get rid of the "slop"

 

[waxhead]

i thought about smearing a thin thin amount of jbweld on top and torque while it is still wet. i would much prefer to just throw in a thin metal gasket to get rid of the "slop"

Jb weld would break up under the load
If you really wanted to use the head and im not sure why you wouldn't just buy a new shell ? you could possibly machine the head then make a shim to get the heights right.
But better still buy a new head

 

[QJS]

the gasket would be installed on top of the dome inbetween the head shell to give us the 0.003 interference to crush the dome down. not between the dome and the cylinder like a typical head gasket. you following me?

Seen a guy over here do this, made some shims up out of beer cans on a beach as a temporary repair, he had to drink a lot of different beer to find a can the right thickness and was pretty drunk by the time he finished but it worked. Sounds like a wind up but its true.
Chris.

 

[waxhead]

Ha ha ha
Was he to pissed to ride after that, I have made a b-pipe 3 bolt gasket from a beer box one time on the beach. Was still going last I heard