Super Jet Too much psi?

[logan holder]

my superjet is being looked at by Art at jetworks and is at 200psi. He is concerned a little with that much pressure. Is this pressure in the right area for my superjet. I know Art is very knowledgable, im just trying to figure out if i should be concerned for any reason.


It is freshly bored 1mm over w/ brand new WSM pistons/rings by DASA
Also it has a riva non girdled head with 27cc domes.

All new gaskets, reeds, crank seals

thanks for any input

 

[jamesgunter68]

Make sure you run race gas

 

[btmboards]

I would run a girdled head and what kind of gas are you running, at some point pump gas will no longer cut it and at 200psi I think you are there. I have seen muliple people on here running 200 though and a few with a little more.

 

[dmpus]

Last time I measured my SJ with ADA girdled head, 35cc domes it showed 200PSI which is quite odd. I was going to ask the same question.

 

[Schmidty721]

I wouldn't run that high of PSI without a girlded head or with WSM pistons.

I'm right at 200psi and run a 50/50 mix of 110 & 91 for fuel. No long WOT runs for me.

 

[keith t]

I run 200 psi on a 760 motor with ATP girdled head and 33cc domes.

I always use 99 Octane pump gas (which is readily available in UK) but no WOT runs for this ski

 

[logan holder]

Im going to be using high octane gas, thanks for the input guys.