17 800 turbo 90psi to low?

[IWantATurbo]

just got the sled ready for this year and did a comp test and got 90psi wide open on both sides? i have never rode this sled or any turbo sled first one!!! (should change my name! lol) should i order some piston and rings or run it make sure all else is good and see how i like it first?

 

[Ax-ski]

I've sprayed wd40 down the cylinder before to see if the numbers would come up. They came up to with in spec so I was about to just replace the rings but since I was in that far did both rings and pistons. On another sled I had 120 and 100 at the beginning of the year and by the end it was closer to a 115 in both. Not sure if sitting over summer maybe shrunk the rings but never had a issue with it.

 

[Ultrasauras]

Our 2018 was 125 per cylinder with 1500 miles on it two days ago FYI we are at 3400ft

 

[tuneman]

just got the sled ready for this year and did a comp test and got 90psi wide open on both sides? i have never rode this sled or any turbo sled first one!!! (should change my name! lol) should i order some piston and rings or run it make sure all else is good and see how i like it first?

How many miles are on the sled? Also depends upon what elevation you're at. Should be around 120psi, so 90 is too low, unless you're at maybe 6-7k feet up.

The good thing is that both cylinders are even. So, I'd first question your gauge. Is it just reading low?

 

[kmg]

Cheaper gauges can read low, do a leak down if you can. We bought an engine for a project sled that tested 120 on both sides but one side had 30% leak. I don't even use compression testers anymore.

 

[sledhead9825]

Crank up the boost !!!