borgiewindsor

hi am after a fact sheet or somethin on how to self tune holley carbies my windsor is running real rich when rev it it shoots unburnt fuel out somthin cronic any help would be much appreciated

dalesf150

what sort of holley? has the problem just started happening or is it a new carb to the car. could be an ignition problem too.

when I brought my 465cfm 4150 series (great size for 302 IMO) holley it had No60 jets it it which was way to rich I looked up the holley website and fount the stock jet size 57 put them in adjusted the float bowls and the ego sensor showed stoic throught entire rev range. I did need to put a different accelerator cam in to allow for the auto and heavy vehicle.

here's a website that might help http://www.mortec.com/carbtip1.htm

Gearhead99

I'd check the power valve and the float level first.

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Dave
2005 F150 SuperCrew "King Ranch"
2004 Thunderbird
1997 Ranger
1986 LTD II
1968 Cougar
1964 Corvair Monza

Dmax

You need to change the jets, just go 2 sizes down and try that. I'm running a 302W with a 350 on it with 64's which is probably as big as you would want to go. I think I'm running a size 80 power valve which is fine. Remember if you change the power valve, the number refers to the vaccum required to open it so if you want to lean it out, use a higher number.
Onvce you get the jets sorted you will have to retune the idler jets. Open the idler screws out a couple of turns and get the car idling, then turn them in slowly. Once the engines starts running rough, give them a quarter turn out. Do this to both sides a couple of times till all happy.

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