Super Jet How much should a head effect jetting?

bach6177

bach6177

So here is my dilemma, I’m throwing a super jet together for the Daytona freeride since all I have are flat water skis and a chan. I have an aftermarket head with domes to put me at 180 psi and I have a 10/16 prop I was going to toss in, but lacking aftermarket exhaust. since it’s freezing here already i won’t get to play with jetting before the freeride and I’m not sure how much a head and prop will throw off the stock jetting. Looking for opinions.


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M

mikesx

Milled a head for 180 psi on a completely bone stock FX1 that I picked up ,61 x,stock exhaust, and if I remember correctly it even had a RIVA CDI and didn't require jetting changes. At most adjusted carb for nice tan look on plugs.
 
DAG

DAG

Yes, my balls tickled from that landing
Location
Charlotte, NC
Assuming porting and squish arnt anything exotic you typically don't need jetting changed with head swaps. Maybe miner tweeks to the needles. Just be sure to run a fuel that won't detonate with whatever compression increase you end up with
 
bach6177

bach6177

Motor is bone stock, I have just never only installed a head before. Usually i do exhaust and everything. At one time.


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