Ski Boat Forum

Repairs and Maintenance => Boat Maintenance - American Skier => Topic started by: Hellfighter334 on March 09, 2016, 04:52:18 PM

Title: Jet size
Post by: Hellfighter334 on March 09, 2016, 04:52:18 PM

I have an 84' AS with the Commander and EI conversion.  Has a Holley 4b.  What jet sizes are you guys running? and power valve size? 

Jason H

Title: Re: Jet size
Post by: lcgordon on March 10, 2016, 09:05:31 AM

I would not know dont have that boat but may helps to post elevation.

Title: Re: Jet size
Post by: Hellfighter334 on March 10, 2016, 12:39:45 PM

I live in AZ on the Colorado.  Elevation is about 500'.  I was also wondering what size power valve?  Thanks

Title: Re: Jet size
Post by: backfoot100 on March 10, 2016, 12:48:51 PM

Need some more info Jason.

I assume it's a factory 600CFM? If so, the factory jets are just fine. I'm pretty sure that most every 600 I've had apart uses 66 jets. If you can post the list number of the carb I can look up what should be in there.

Most PV's should be a 6.5. The only way to really tell is to take a vacuum reading on your motor (which most that are reasonably healthy should be in the 15-17" vacuum range). If that's the case, a 6.5 PV will work perfectly. The carb may have came with a 2.5 PV which will be rather sluggish on acceleration then. Upping that to a 6.5 would wake it up very nicely.