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Unread 06-13-2002, 08:35 PM   #1
Trailryder42
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600cfm Edelbrock on 258 6 cyl.

My son is looking at buying an '88 Wrangler with a 258 6 cyl.. One of the previous owners put a Clifford intake manifold, headers and what seems to me to be overkill for carburetion, an Edelbrock 600cfm, manual choke, 4 barrel. From what I can find on the net, a 390 4 barrel is the largest recommended carb for this manifold/engine size. Any comments/thoughts are appreciated.

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Unread 06-13-2002, 08:57 PM   #2
Bob K
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I don't have experience with that large a carb on a Jeep. But it doesn't sound like a good idea for all the obvious resons. Assuming the motor is stock. I can remember that a Holley 650 was a good size carb for a high performance engine in the 350 cubic inch range.
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Unread 06-14-2002, 09:45 AM   #3
4wheeler4CJ
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I ran a mildly "Clifford" modified 258 in my last CJ for 6 years, with the saem setup, including the intake, 390 carb, dual exhaust headers, cam, etc.

The 390 is ABSOLUTELY the largest you should use, 600 is absolutely ridiculous on a 258. Even with the 390, I ran rich sometimes until I got on it.
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Unread 06-14-2002, 02:13 PM   #4
Trailryder42
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Thanks guys for those thoughts. That's pretty much what I figured. Something else I thought of about it. I bet it would need adjusting, jets-wise and retuned if he ever took it to altitude.
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