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Old November 6th, 2005, 09:37 AM   #1
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Default 258 with a supercharger???

Anyone Know of any after market superchargers for a 258?? Or if it can even be done, I already have aftermarket howell tbi
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Old November 6th, 2005, 05:47 PM   #2
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I'd really look at a new head before supercharging it. The whole point to forced induction is to get more air into the chamber, and overall, the 232/258 heads didn't breath all that well..

I'd go with a 4.0 head or even a whole 4.0, there are superchargers for them, if I was to do it(which I wouldn't)

$$$$, though, no matter what. I'd go with either an AMC V8 or a Small Block Chevy..
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Old November 6th, 2005, 11:59 PM   #3
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You can build a sb chevy.. AND super charge it for the cost of a supercharger for the inline 6
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Old November 7th, 2005, 08:28 AM   #4
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yep to do the the Avenger supercharger I put on a 2002 TJ was over $5,000. I
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Old November 9th, 2005, 10:53 AM   #5
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You should look up Jeff (Cobranco) on the MJ board. He is right in Zeeland. He built several Superchargers for late model TJ 4.0 258 I-6 (he owns a machine shop and fabs up his own brackets, mounts, etc). He might be able to help you and it would be significantly cheaper than going with a KB or Avenger, etc... if that is a factor for you.

I've personally seen his setup and it's top notch. I believe he was running around 6lbs of boost off of an Eaton blower.

HTH, Good luck.
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