Tbi conversion yj - JeepForum.com

 
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post #1 of 5 Old 06-17-2013, 08:30 PM Thread Starter
jasonjones21
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1989 YJ Wrangler 
 
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Tbi conversion yj

Is it worth the upgrade to do a tbi and get rid of the carter carb or should I just do a 318 swap? Money and mpg difference

Thanks

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post #2 of 5 Old 06-17-2013, 10:18 PM
greyarea
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I can say it is well worth it for a junkyard tbi swap. I would say not so much for a Howell or AFI setup. That being said I am in the middle of a 5.2(Magnum 318) swap after running TBI for a few years. After TBI the old 258 with a 4.0 head would rev to 4500 smoothly and make what little power it could all the way up.

90 YJ Magnum 5.2 v8 , 1'' BL, 1'' booms, 4" Procomp, 35/12.50-15 MTR/kevlar Ford 8.8 4.10 lsd Aussie and TJ shafts up front.
KI4UTU
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post #3 of 5 Old 06-17-2013, 10:25 PM
timatoe
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Being that you're in CA, I would highly recommend doing the Howell TBI. You only have a few options out here to still be smog legal.

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post #4 of 5 Old 06-17-2013, 10:35 PM Thread Starter
jasonjones21
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Ok I will be moving out of ca real soon to a smog exempt state so which is better tbi or 318 swap thanks
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post #5 of 5 Old 06-18-2013, 09:25 AM
NonRubicon
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Can't compare the 4.2 w/tbi to a 318, but compared to the carbed 4.2, the tbi upgrade is a vast improvement in performance and power. MPG didn't really change for me.

With that said, you are trying to compare a I6 with a V8. "Better" is quite subjective and depends on your criteria.
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