christophros

So my girlfriend and I are in the process of rebuilding the i6 motor from her 1996 Cherokee. We're kind of stuck right now... we have the 4.2 crank rods and injectors for a possible stroker... but since it will only be a daily driver, we were considering keeping the stock bore and crank but putting in a cam and higher compression pistons.

Now a question about the stroker option... the "poor man's" stroker calls for pistons that cost about $500 from summit. This price is ridiculous and is pretty much what is turning us away from the stroker.

We can get higher compression pistons for the 4.0 and keep stock bore and stroke, using the bigger injectors if necessary.

I'm kinda just asking for opinions here /shrug

christophros

Also the quote we got for the machine work (if we were to stroke it) was about $1000. It would be a few hundred less if we didn't stroke.

evan00xj

I would talk to the guys on jeepstrokers.

Tom95YJ

If your rebuilding it stroke it. There is no replacement for displacement.

Once the 4.2 dies in my YJ I am getting a stroker kit from 505 performance for it , doing a 4.0 head conversion which will be ported and it'll get fuel injected. The stock 4.2 crank will get cleaned inspected coated in oil and vaccum sealed in a bag and stored until I build a stroker out of the XJ's 4.0

cruiser54

Isn't there a "junkyard stroker" also.

Tom95YJ

Yes it's installing a 4.2l crank in a 4.0 it give you a. 4.5l stroker

christophros

Has anyone done this recently? What pistons did you use?

cruiser54

I know that!!! I just got done with my 4.6.

But there's an option without going with expensive pistons.

christophros

What pistons did you use in your 4.6? How much were they. If we can get some pistons for less than or around $300 we'll stroke it.

cruiser54

I used Golen's recipe.

christophros

Wut

cruiser54

I got a used Golen Engine and rebuilt it.

The point is, I believe there is a recipe which doesn't require expensive pistons or machining.

peter93xj

Wouldn't it be just using regular 4.0l pistons with the 4.2l connecting rods and crank.

peter93xj

4.5L "Poor man's" simple stroker

Jeep 4.2L 3.895" stroke crank Jeep 4.2L 5.875" rods Sealed Power 677CP standard bore pistons 9.2:1 CR Stock 4.0 camshaft Ported HO 1.91"/1.50" cylinder head Mopar/Victor 0.043" head gasket 0.088" quench height Ford 24lb/hr injectors with stock 39psi FPR for '87-'95 engines, stock injectors with stock 49psi FPR for '96 and later engines 247hp @ 4900rpm, 300lbft @ 3500rpm

cruiser54

But how much are those pistons?

Search "jeep junkyard stroker".