DASA WTF! Bore cyl what clearances are you running?

[fastony]

Cant get anybody to respond and Kyle will not answer nothing Took over a month too get pistons and trying to get it bored, what clearances on the piston is the best to run on a Dasa cyl 89.5mm Thanks for any response!

 

[Blue]

Typically .005 to .0055
5 and a half not gonna hurt it.

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[fastony]

I had one person tell me .007 but that seemed a little too much.

 

[fastgtfairlane]

really depends on how much compression and also whether its a cast or forged pistons youre running as to what the clearances will be.

 

[Blue]

Yes thats too much. I believe oem clearance was 8 or 9 and it needs rebored so at 7 ur almost there. If your worried go .0055 Wassers pistons can go tighter at .0045 but not wisecos.

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[fastony]

Dasa only uses wiseco and that is what I have I know cast piston are less but being the wiseco pro lite that is made just for them I didnt know if it needed the extra clearance? 180lb. compression ported Dasa 920

 

[iQRTurbo]

Anything less than .005” in a jet ski is risky business, personally I wouldn’t be worried about .006 clearance in a fresh straight bore. Tight clearance in the washing machine environment inside a jet ski is a good way to wipe out a motor. Water takes up the clearance and smears the piston against the bore. Running it loose is safer. Obviously a bore wears some but most people don’t realize most of the high clearance is from a worn out piston. New pistons will usually tighten a motor back up with a fresh hone. My two cents... don’t bore anything without pistons in hand, measured with proper equipment by someone that knows how to measure it and then add .005-.007, measuring with proper equipment. You won’t notice any performance loss in a loose bore but you will be pissed if you smear a new set of pistons trying to gain that tenth of a tenth of a tenth with low clearance.