do you have to rejet when you up the compression?

[mattb348]

Hey again guys. I bought noss machine heads wth 18cc domes. I'm gonna run 104 octane fuel if need be (I'm about 1000 feet above sea level).

 

My questions is this: I already have PC pipes & silencers, along with K&N clamp on filters (no airbox). I am currently running 30 pilots & 330 mains, and it is working well so far.

 

Do I need to rejet when I put on my new noss machine head & 18cc domes? becuase right now its running the stock head, stock compression (about 120 PSI). Will I have to rejet with the added compression? And if so, what is a good place to start?

 

Thanks again!

[icecold_shee]

no, just higher octane

[ellison445]

no!

[mattb348]

Thanks guys!

[dajogejr]

I agree with the boys above.

However...before you waste money on race gas...get the head on and test the compression again.

 

If you're around 150 or less...premium pump gas will work just fine....according to Noss's chart, you should be right around 178 or so.

 

You'll definately need race gas if you're close to that...

 

Have fun...