4.0 stroke & swap - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 06-11-2000, 12:41 PM
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4.0 stroke & swap

I have just gotten 4.0 from '94 cherokee auto tranny to swap in my 4.2 '89 wrangler manual tranny. It came with AC compressor,starter,power steering,computer, wire harness, fly wheel. It has 120,000 miles and paid $450. I have heard of stoker kits from Hesco and Clifford. Has anyone dealt with or heard of Accurate Power in Deleware? They have stroker kits for less $ and ends up 4.6L. I also planned on larger chevy valves in rebuilt head. Are strokers fairly reliable? I will still need computer for manual tranny and front dampner. Will injectors have enough flow? With help from Rich I will use fuel sending unit from '87-'90 4 cyl yj and pump from '91-'95' 6cyl. this to eliminate vapor lock you keep hearing about with external pumps. Any veiws on to stroke or not and parts I need are appreciated. Or is stock stroke with cam,headers ect the way to go. I have put in rebuilt AX/15 tranny and t-case. 4.5"RE Extreme, warn front one peice axles with lockouts and eliminated axle disconnect, short shaft kit for slip yoke. Thanks

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post #2 of (permalink) Old 06-11-2000, 04:39 PM
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Re: 4.0 stroke & swap

Just take the crank and rods from your 4.2 and put them in the 4.0, and bore the .030 over. Comes out abouit 4.5l. Use a flywheel from the 4.0, and there won't be any reason for the spfi balancer. Make sure that your machine shop balances everything as an assembly, which should include the pressure plate and harmonic balancer. Your bell-housing should already have the mounting for the crank angle sensor. Don't wast your money on the Chevy valves, the 4.0 head flows pretty good. There is a link someplace, I'll see if I can find it.

http://www.bc4x4.com/tech/bryce/stroker/stroker.asp

http://forums.vmag.com/pm-0400/messages/1709.html

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