Jet # - drill size.

[yamanube]

Okay, aparantly NOBODY in the area can find me a 150 pilot jet. As a temporary fix, does anybody know what size drill bit I need to match a 150?

 

[yamanube]

Never mind, I found the jet locally and get to do it the right way.

 

[thegoldenboy]

I wouldn't drill a jet unless using it as a water restrictor. Never in a carb.

 

[oxnard111]

I wouldn't drill a jet unless using it as a water restrictor. Never in a carb.

usually drill out old seats for water restrictors.

 

[yamanube]

I wouldn't drill a jet unless using it as a water restrictor. Never in a carb.

Never mind, I found the jet locally and get to do it the right way.

:cool2:

 

[SUPERTUNE]

Wow, 150 pilot? Big toilet carbs with no venturi? Must be a seadoo...I can't see that a reed valved engine with a SBN modified carb you ever use anything that big? Is this a freeride/freestyle engine? Maybe Methanol and not gasoline?

 

[egbrig]

I know of several race lamey engines including mine that run 150 pilot and a little bigger in there NOVI carbs. And yes, they hit like hell!

 

[Mike W]

Wow, 150 pilot? Big toilet carbs with no venturi? Must be a seadoo...I can't see that a reed valved engine with a SBN modified carb you ever use anything that big? Is this a freeride/freestyle engine? Maybe Methanol and not gasoline?

That is what Blowsion and Riva reccomends for the single 48mm Power Bombs as well.

 

[yamanube]

Wow, 150 pilot? Big toilet carbs with no venturi? Must be a seadoo...I can't see that a reed valved engine with a SBN modified carb you ever use anything that big? Is this a freeride/freestyle engine? Maybe Methanol and not gasoline?

Yep, what MikeW said. 86mm 62T, single powerbomb. Jetting straight off of Ross Champions boat with similar setup. Thats my starting point, Ill tune from there.

 

[Watcon]

Jet sizes

I carry a full selection of jets up to #160, and it's not unusual to use them in certain applications. http://www.watcon.com/Catalog_Pages/Carb_Jets.htm

Contact me directly at wcc@watcon.com

Thanks,
Randy

 

[SUPERTUNE]

I know of several race lamey engines including mine that run 150 pilot and a little bigger in there NOVI carbs. And yes, they hit like hell!

Ok. RACE!!
And yes, Riva powerbombs, most race Novi's are straight venturi carbs...they need huge low speed jets. I was thinking freestyle engine setup, I have used up to 142.5, but never for anything like #150 (dual carbs only)
After seeing some more posts...maybe I can see using one for a straight venturi carb for a single carb application.

 

[bad93blaster]

Ok. RACE!!

what would be the difference?
i would think we are trying for the same thing (bottom and mid power )

 

[egbrig]

I guess this is what the forum is for. Someone askes a straight forward question and someone like me has to throw in the (Oh yea!) statement. Sorry for that. Yes, there are some that use such jetting but we are not talking about their setups.

 

[waxhead]

i was running 155 lows on my 800 hx with dual 48 novis
thats a pure race thing

 

[SUPERTUNE]

Freestyle and race jetting are most times different.