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  1. #1061
    Very high for stock engine


  2. #1062
    Just put this guy together last nightClick image for larger version. 

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  3. +1 by:


  4. #1063
    Quote Originally Posted by turboman412 View Post
    Very high for stock engine
    I thought it was a bit high. I believe around 110 to 115 was good for a stock engine. It is probably because of my expert engine building skills that it is so strong!

    Here is cylinder 1:

    Cylinder 2:

    Cylinder 3:


    If the ADA 42cc heads add approximately 20 psi I will be in the low to mid 140's. Is that still safe for 93 octane?

    The compression tool I am using is a Snap On and fairly new. It should be accurate but I don't know that for sure of course. I am just happy all cylinders are within a few psi of each other and that is always a good sign.
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    Last edited by beekermartin; 05-25-2020 at 09:46 PM.

  5. #1064
    Quote Originally Posted by turboman412 View Post
    Just put this guy together last nightClick image for larger version. 

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    That engine looks brand new. Nicely done!

    You should remove one of the triple pisser fittings and send it to me! I am not having much luck with Skiworx sending me a replacement. Hopefully this week he will answer the phone...

  6. #1065
    I actually did get in touch with Skiworx about a week ago about my own triple pisser kit.. He said there was a shortage of the brass fittings but that he had a shipment of them on the way. Hopefully not too much longer!

  7. #1066
    Quote Originally Posted by SeawardToast View Post
    I actually did get in touch with Skiworx about a week ago about my own triple pisser kit.. He said there was a shortage of the brass fittings but that he had a shipment of them on the way. Hopefully not too much longer!
    He emailed me last night. He is shipping me one today. Hopefully I don't make this mistake again...

  8. #1067
    I installed the ADA head with 42cc domes tonight. It is a fairly easy install but the first time I placed it on one of the orings popped out of place. The second time I added a bit more grease to hold them in place and it went on perfectly. After installing it I started the motor and let it run for roughly 10 seconds. I then shut it off and checked the compression.

    Cylinder 1 (magneto side)

    Cylinder 2

    Cylinder 3


    Basically compression increased by almost exactly what ADA said it would, ~20 psi. Am I still safe to run it with 93 octane at these compression levels? I am going to email ADA and ask their opinion as well.

    Another question is in reference to the spark plug grounding connector. It can't be used with the ADA head. Should I install it somewhere else on the motor? Also, the stock heads don't have washers on the two threads the grounding connector goes on. So I don't have any washer on those two. Should I pick up two extra washers?

    Last thing is I am still using a stock cooling fitting on cylinder 1 until I receive the replacement from Skiworx. On the the hose cylinder one is running much cooler and the water coming out of the pisser is at a much lower pressure. In the water they all seem to be the same but on the hose this is noticeable. This was the same with the stock heads installed as well. Should I be worried about running it like that until I receive the replacement fitting from Skiworx?
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  9. #1068
    Here is a quick tip for anyone that comes across this thread. Use a heat gun to warm up the coolant hose before pulling them off of the fittings. Not only will they come off much easier but they should seal again when you reinstall them. I recommend heating them up when you install them as well. They slide on "like butter" and they sealed for me. When I pulled them off without heating them they leaked when I reinstalled them. I had to cut the bad ends off for it to seal.

    So use a little heat when removing and installing the coolant hoses. It makes it easier to remove/install and it should help them seal as well.

  10. +1 by:


  11. #1069
    Youll have to ask ada i am not sure if in safe range.

    Run the stock pisser, running on hose all depends on pressure at your house.

    I cut the lip off the side of drive shaft cover and moved the ground to there. Let me know if you want me to get a pic of it

  12. #1070
    Quote Originally Posted by turboman412 View Post
    Youll have to ask ada i am not sure if in safe range.

    Run the stock pisser, running on hose all depends on pressure at your house.

    I cut the lip off the side of drive shaft cover and moved the ground to there. Let me know if you want me to get a pic of it
    A pic would be great.

    Have you checked the compression on your motors?

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