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carb problems

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302supra:
ok i am running a holly 600 cfm on my car and it is running rich, what i have in the engin is - 40 over flat tops 351w heads, 512 lift 280 duration comp cams cam, factory gt 4bbl intake and headers ( had to run theas for clearince reasons) and new evrything, factory ford ignition with a msd coil ,with a holly 600 cfm carb.

its not running extreamly rich but i can back the mixture screews all the way out and it still runs rich i swaped the jets out for 55's and still. also it stubles whin acceleration unless you punch it to the flore.

any ideas will be great.

and yess some day i would like to get a mustang!!

it is a toyota with a ford 302 in it!!!

Soaring:
Why are you running a Holley on a Toyota engine?  Go to a Toyota site and ask those guys which carb you should be running with that Supra. 

302supra:
its not a toyota engin its a ford 302 out of an 84 gt. i mean come on how would i run 351w heads on a toyota engin? pleas read befor jumping to conclusions.

also the flotes have bin ajusted and i am running the ford on block fuel pump. the carb is new so i dont know what the problem is.

Soaring:
Oh, sorry.  It's late and I have had some California red.   ;D   If you are talking about the idle adjustment screws, then you will only get a reaction from that carburetor at idle when adjusting them.  Your jets will mostly determine the richness that your carb runs.  55's may still be too large.  Drop down to 45's and I'll bet you will notice a  big difference in performance.  I have never had a Holley that gave me good performance.  I stick with Edelbrock and Motorcraft on a Ford engine. 

302supra:

--- Quote from: Soaring on April 12, 2009, 12:35:23 AM ---Oh, sorry.  It's late and I have had some California red.   ;D   If you are talking about the idle adjustment screws, then you will only get a reaction from that carburetor at idle when adjusting them.  Your jets will mostly determine the richness that your carb runs.  55's may still be too large.  Drop down to 45's and I'll bet you will notice a  big difference in performance.  I have never had a Holley that gave me good performance.  I stick with Edelbrock and Motorcraft on a Ford engine.

--- End quote ---

lol np well i am talking about the screews on the side there is one on eatch side of the carb on the meatering block. i will try the 45's and see what it will do, i thot about trying to go with a motorcraft but i didnt think they made one that was in the 600 to 650 cfm range.

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