Holley 4555 stock jet sizes
 

Anyone know a site to go and look for this info ?

Re: Holley 4555 stock jet sizes
 

You're on the right site here.

Primarys are 70, secondarys are 76.

Ask and ye shall recieve.

Re: Holley 4555 stock jet sizes
 

Damn you guys are quik...I was just giving you all an out if no one had it !!! https://www.yenko.net/ubbthreads/imag...iggthumpup.gif

Re: Holley 4555 stock jet sizes
 

Go to this page (PDF) and print it out for all kinds of original Holley carb specs.

http://www.holley.com/HiOctn/ProdLine/CarbList.pdf

Lynn

Re: Holley 4555 stock jet sizes
 

You guys are unbelievable...thanks https://www.yenko.net/ubbthreads/imag...lins/beers.gif

Re: Holley 4555 stock jet sizes
 

[ QUOTE ]
Go to this page (PDF) and print it out for all kinds of original Holley carb specs.

http://www.holley.com/HiOctn/ProdLine/CarbList.pdf

Lynn

[/ QUOTE ]

Can someone help me correspond my Model 4150 List 4557 to this list so I can make sure I have all the right parts?
Thanks for any help..
-Sam

LS6 L78 4557 jets??
 

[ QUOTE ]
[ QUOTE ]
Go to this page (PDF) and print it out for all kinds of original Holley carb specs.

http://www.holley.com/HiOctn/ProdLine/CarbList.pdf

Lynn

[/ QUOTE ]

Can someone help me correspond my List 4557 (1970 L78, LS-6)to this list so I can make sure I have all the right parts?
Thanks for any help..
-Sam

[/ QUOTE ]

Just the correct jet sizes? https://www.yenko.net/ubbthreads/imag...s/confused.gif Anything? https://www.yenko.net/ubbthreads/imag...lins/dunno.gif
Thanks!
-Sam

Re: LS6 L78 4557 jets??
 

I don't know about '70 but our '69 COPO Chevelle came with #68 jets in the primaries and #76 in the secondaries. There was noticeable lean surge at 60 mph.

Re: LS6 L78 4557 jets??
 

[ QUOTE ]
I don't know about '70 but our '69 COPO Chevelle came with #68 jets in the primaries and #76 in the secondaries. There was noticeable lean surge at 60 mph.

[/ QUOTE ]

Thanks Keith! Would these be the same jets for the '70 L78 and LS6? Mr70, or anyone?
-Sam

Re: LS6 L78 4557 jets?? *DELETED*
 

Post deleted by Mr. T

Re: LS6 L78 4557 jets??
 

Thats awful lean....a little LT1 takes 70's and 76's...

Re: LS6 L78 4557 jets??
 

The 70 L78 Nova came stock with 68 primary and 76 secondary jets in the Holley 4150. This may be a bit lean - check the plugs and size um accordingly,

Re: LS6 L78 4557 jets??
 

Thanks Dean! Surprising that the LT-1 would get bigger primary jets than an LS6 or L72 - go figure!
-Sam

Re: LS6 L78 4557 jets??
 

When re-jetting, what combinations have people used with the stock L78? I was thinking about going larger by 2 or 4 sizes.

Re: LS6 L78 4557 jets??
 

I have 72 and 76 in mine. Runs great that way.

Re: LS6 L78 4557 jets??
 

Here is THE setup for these carbs, courtesy of COPO Pete:

72 fronts, 84 rears...with a 65 power valve in the front and a plug in the rear. Made a world of difference in our cars...

Re: LS6 L78 4557 jets??
 

https://www.yenko.net/ubbthreads/imag...mlins/grin.gif