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Unread 01-31-2012, 06:37 PM   #1
Sliver
Registered User
1987 YJ Wrangler 
 
Join Date: Jun 2010
Location: Duluth, MN
Posts: 3
Swap or update

Hello and TIA,

I have an 87 YJ 4.2 carter carb (rebuilt) automatic. Body is great, engine has only 119k on it. Wants are, better starting, more power, better fuel economy. Please rate the options.
1) swap out for a newer 4.0 with FI (have a 98 in mind that sounds OK) $$
2) Howell FI $$$
3) Head swap to a 4.0 with FI ???
4) Switch out to a new Weber carb. $

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Unread 01-31-2012, 06:47 PM   #2
gbeltran
Registered User
1988 YJ Wrangler 
 
Join Date: Nov 2004
Location: Redondo Beach, ca
Posts: 395
I'd skip the Weber (or any other carb for that matter). Howell will be the easiest of the EFI swaps that you have listed. I think you can modify the 4.0 EFI manifold to fit the 4.2 head so you don't have to swap heads if you want to go that route, that's what the Mopar EFI conversion kit uses. Me, I'd go Howell, but I'm biased since that's what I used.
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Unread 01-31-2012, 06:57 PM   #3
Collin89Sahara
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1989 YJ Wrangler 
 
Join Date: Jun 2011
Location: Frisco, Il
Posts: 1,375
If I had the money I would buy the 4.0, stroke/rebuild, that way I have a brand new fresh engine. Just my $.02
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