Re-jetting Holley Street Avenger...

[SadbutTrue]

According to my dyno, my A/F was roughly 14-14.5. It should be (so I hear/remember from my old Edelbrock tuning kit) 12.5-13 for most power. Basically, I need the jets to be about 10% richer than they are now.

The Holley rep said the stock Street Avenger had '65' size jets adn that I should try '68's. Does this sound right? And is there a way to get a single set of jets isntead of buying the mega-kit summit sells (i can't imagine I'll ever need 30+ jet sizes...)? Also.. those kits sell 2 jets at each size... this may be a dumb question but it woudl seem I would need 4...

Thanks

 

[SadbutTrue]

also its a 670 street avenger and that 14-14.5 figure is from 2500-6500 rpm. its pretty rich below that, but thats probably because my idle screw is set to richer than normal (which i plan on backing off, fwiw).

 

[JC6715]

I've always heard that you need to move 3 sizes up or down to make any real change... I just went to my local parts store and they sell individual pairs of jets, so you don't have to buy the massive kit.

Hope that helps.

 

[woodsnake]

IF there is a Schucks store near you that sells speed parts, they should have them. Or, you can buy pairs online at ebay also. 14.7 to one, as I recall, is the target number. Are you sure you need to change them out?
What will you gain? Or, what do you think you will gain?

 

[D.Hearne]

You can buy pairs of jets at Advance Auto, Autozone, O'Reilly's and other places locally as well. When I rejet, I go at least 4 numbers up or down, with 2 numbers, you may never see a change.

 

[SadbutTrue]

You can buy pairs of jets at Advance Auto, Autozone, O'Reilly's and other places locally as well. When I rejet, I go at least 4 numbers up or down, with 2 numbers, you may never see a change.

Just called autozone and they said they didn't have em... i could have just been speaking to an idiot though...

 

[SadbutTrue]

also... anyone have any more opinions on that size and/or experience going as big as blkfd went? I'll probably go with a size similar (perhaps not quite so extreme) on each, unless people tell me thats a terrible idea

 

[D.Hearne]

Just called autozone and they said they didn't have em... i could have just been speaking to an idiot though...

You've got to remember when dealing with these stores that many of their employees were flippin burgers last week. In addition to that, the last cars with carbs left the factory well before they were born.

 

[10secgoal]

I'd buy the whole box. You will need different sizes for the rear. And if it needs more or less than the 3 you were told, you have to go buy another four. If you ever make a change down the road...see where I'm going ?

Make sure to go up in the rear the same as the front.