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Old 07-01-2003, 02:09 PM
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Rich Running 400 Sbc Help !!!!!!!!!!

I have a rebuilt 1000 mile 400 SBC .30 over toruqer intake 750 edelbrock mild cam ,HEI Axcel super coil , new plugs new wires, timming is set at 13 DEG. but the car still runs rich, if it's in the garage running it's so bad your eyes will burn , & smoke out the shop ,

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Old 07-01-2003, 03:36 PM
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If the plugs don't clean out after taking it up the road you prolly need to jet it down a size or two.
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Old 07-01-2003, 03:47 PM
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The edelbrock has needle and jet kits for that. There should be a book that comes with them with a chart to fix that problem.

Troy;
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Old 07-01-2003, 07:49 PM
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750 too big

I had an 850 on a 350HP and at freeway speeds if u floored it I got gray smoke [blowing gas through without burning it]. Also called washing the cylinders. If I kept this up, I would have eatten the cylinders out quick.

Changed to a 600CFM and it ran better and stopped washing and running rich at idle. If you can do it with jets, good. That is just a lot of carb for your engine.
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Old 07-01-2003, 09:18 PM
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Did u adjust the idle mixture screws. If u did not thats why is so rich. i bought an edelbrock 750 and it was really rich out of the box. In fact it burned my eyes too in the garage idling. Until i got the mixtures screws adjusted perfectly with a vacumm guage. If the idle screws are adjusted correctly. then check your color step up springs. they should be orange color out of the box if u did not change it.
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