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  1. #1
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    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.


  2. #2
    Moderator beerdart's Avatar
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    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.

  3. #3
    785 Pro Mick's Avatar
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    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.

  4. #4
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    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?

  5. #5
    785 Pro Mick's Avatar
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    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.

  6. #6
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    Were you having water coming out from the sides (between the head and cylinder) or from like underneath the bolt head?

  7. #7
    Moderator beerdart's Avatar
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    Mine has never leaked.

  8. #8
    785 Pro Mick's Avatar
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    Quote Originally Posted by hyoctane23 View Post
    Were you having water coming out from the sides (between the head and cylinder) or from like underneath the bolt head?

    It was leaking from the bolt head.

  9. #9
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    Quote Originally Posted by 785 Pro Mick View Post
    It was leaking from the bolt head.
    Did those washers with rubber seals not work that were suggested in your other thread?

  10. #10
    785 Pro Mick's Avatar
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    Quote Originally Posted by hyoctane23 View Post
    Did those washers with rubber seals not work that were suggested in your other thread?
    I never used them. I do not think you should need them.

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