Ive been reading lots of messages about ditchin the old carter bbd carb and installing a motorcraft 2100 or holley 350. Can anyone fill me in on the type of adapter I well need for my '84 cj7 258 intake. Several messages mentioned building your on adapterbut I think Id rather buy one. Any dirt on this topic would be gladly appriecated.DROP ME A LINE>... thanx [email protected]
dont adapt, go with a new manifold (clifford or offy). as far as carbs are concerned, go with the motorcraft. they work on the trail better with less mods than the holley. if you go with the holley, double spring the float, run off-road needle and seat, add a vent whistle and pitot tube extension.
Two things, first I made a BIG MISTAKE several years ago(I was just getting into Jeeps) and got the Adapter for the stock manifold for my 87 YJ and a Holley carb. This set up turned out to be so bad between the emission problems and running bad that the stock set up was better and I got rid of the Jeep. That was a close call because I almost gave up on Jeeps all together ( the Jeep Gods prevailed). Secondly I have a 4bbl Offenhauser intake manifold with a 500 cfm Edelbrock carb that comes with an off road Jet kit for sale. The set up was only used for 2 months and is almost brand new. I looking for $225 for the set up plus shipping. If you choose to go this route you will need to scrap the emission stuff and bypass the compuster get some advice on how to do this. If you really want that stupid adapter look in The Jeep Owners Bible by Moses Ludel in the modification section. Ther is a picture of this with a parts #. If you are intersted in the manifold and carb E-mail me at [email protected]
I had a freind of mine who ran a Offy 4 barrel intake with a motorcraft 2150 from a 304 and a set of headers, the jeep really came to life and became a true rock hound. I think that the MotorCraft carbs are the only way to go for ease of tuning and for all out rockcrawling. Just my 2 cents.
By looking at the throttle bore size and the venturi size i would guess at about 350 CFM,this is only a guess! I have one laying in the shop and have been wanting to get it on the flowbench but just havent found the time.
the holley that most use is a (list #4412) this would be a 500 CFM carb,in most circumtances this would be way to big for a 258,they do have a 350 CFM avaliable but i am not familiar with the number.