Thread: ADA 91/93 Octane Domes and Head
05-01-2009, 11:18 AM #1
ADA 91/93 Octane Domes and Head
Has anyone had any problems with this ADA head? I've read some posts about having problems with it sealing on the head bolts and water leaking.
Can you just use the regular gasket or are the ADA o-rings okay to use?
How do you route the cooling water...into a 3-to-1 tee or individual pissers? Any restrictors?
I'm assuming it would be wise to richen the mixture up a bit due to the higher compression temperatures.
05-01-2009, 11:32 AM #2
I have one running with no problems. I went with three pissers but you could do a three onto one. No restrictors the water is regulated by the water manifold.
05-01-2009, 12:11 PM #3
I have had problems with my ADA head. It keeps leaking from head bolts. I have just purchased new O rings from ADA with hopes this will correct the problem.
As far as the water outlet, you can go either way. Right now I have the 3 single outlets going to a T with a single outlet. I now have the 3 single outlets I will be installing.
05-01-2009, 12:53 PM #4
Beerdart, did you do anything different than 785 PM to get it to seal? I think it was your thread 785 PM that I read about the leaking head bolts that made me wonder. You think it is just the o-rings that are bad?
Again, will I need to adjust my carbs at all once I put this on?
05-01-2009, 01:19 PM #5
Not sure about the carbs, I did nothing to mine and it ran fine. Lugs can help with the jetting.
Not sure if the new O rings are going to do the trick. If it doesn't, I think I will junk it and go to a hot seat. I have spoke to many that have used this head without any problems.
One thing Randy suggested is to use a little R-11 on the bolt threads, but mine still leaked after that. I am going to reseal mine this weekend, I will keep you posted on what happens.
05-01-2009, 01:31 PM #6
Were you having water coming out from the sides (between the head and cylinder) or from like underneath the bolt head?
05-01-2009, 01:37 PM #7
05-01-2009, 01:43 PM #8
05-01-2009, 04:48 PM #9
05-01-2009, 09:15 PM #10
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