Secondary jets question.......................

[skip68]

Are the secondary jets the same size as the primary ?    What I mean is can the primary jets fit in the secondary side ?    I'm going to grab some jets today to re-jet the secondary jets from 96 to 82, and so I was wondering if they are all the same thread size from primary to secondary.  The carb is a mighty Demon 750 with 76 primary and 96 secondary.   It runs good on the primary side and smokes like hell when you get into the secondary side.  So, I'm thinking that 82's will be a good size.   

[Ghoste]

Yes, the physical dimensions are the same.

[skip68]

    Thank's Ghoste.   

[vegasmike]

  you just don't believe in me

[Ghoste]

Yeah, thats not good.  You should likely trust Mike before me.  Seriously. 

[skip68]

Mike WAS NOT available when I was wondering.   

[Ghoste]

Ah I see.  He made it sound like you asked him and didn't believe him.

[firefighter3931]

I'm pretty sure that Demon carbs have their own numbering system....you might want to check that out and verify Chuck 

Sounds like it's waay overjetted on the secondary side. If the powervalve is blocked off (it should be) on the secondary side....you should be going up 6-8 jet sizes at the most. Your 82's should be close with the 76 primary jets up front. 



Ron

[BBKNARF]

Sounds like it's waay overjetted on the secondary side. If the powervalve is blocked off (it should be) on the secondary side....you should be going up 6-8 jet sizes at the most. Your 82's should be close with the 76 primary jets up front.  



Ron
[/quote]

Hey Ron, is it ok to run a blocked off powervalve in the secondary side for the street ? I tought it would run to rich.  

[firefighter3931]

Hey Ron, is it ok to run a blocked off powervalve in the secondary side for the street ? I tought it would run to rich.  

I've never run a holley that had a PV on the secondary side....no problems, ever ! 

As long as the jets are correctly sized you're fine. 



Ron

[TylerCharger69]

The carb should have come with a troubleshooting and jet size chart to determine what it really needs...(at least my Eddy did)   But yeah  I personally think a 96 is way too big for the secondaries....Did you buy this carb new?  That doesnt seem like a base setting jet size..

[Ghoste]

And if it didn't come with that guide, they have it online.

[skip68]

I read the jet wrong.   It was 83 not 96...        

They were still to big so we are going to try 78's.   

[TylerCharger69]

78 on the secondaries?....that seems somewhat small to me

[Chryco Psycho]

BG jets are about 5 sizes off the Holley #S so I would start with replacing 83 with Holley 83