Hi,

I am looking for any feedback or test archives on the PSI dail-a-dome heads.

Anybody familiar with aftermarket head mods knows that usually the inserts need to be changed, but PSI claims to be able to screw in adjustments to achive the ratio you want. Sounds like the ideal thing, no coolent loss, etc. ALMOST SOUNDS TOO GOOD.

here is the link from PSI: http://www.psiperformance.com/catalog_2002/page8.htm

The price is great for what they claim.

Let me know if you think this is a good design or any known problems with it.

Thanks

The question is ,how often do you do a major elevation change,i,ve never used them,but read lots of info on them,for that kind of money ,I,d say no thanks,
*Edit;driving up a moutain and down would be benificial,but not knowing where your from dosen,t help,

Sounds like some are having problems with the o-rings when
adjusting them. Just what I've heard. Neat concept but it
doesn't sound like a lot of the mountain riders use them.
I would like something like that for flatland use. Tweak em
to up the compresion and change fuel for a drag then turn
back for trail riding. Can you really have the best of both
worlds with that easy of an adjustment? *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/confused.gif

Been running psi dail-a-dome heads for 3 yrs. no problems.

I had them on a psi 1350 motor and they worked great for the short time that I had the sled. i never got word from the next owner of the motor that he had antproblem. My 1350 was set-up for 235HP trail and with the domes cranked and race fuel 250hp. They are a a great addition to a big motor but I have no clue on a stock type motor.
Caleb