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ISO: '258/4.2L 3.895" Crank - #3727 Casting'

AMX's, Gremlins, Pacers, Ramblers, Eagles etc.
drummergus13
Posts: 2
Joined: December 10th, 2016, 8:26 am
Stroker Displacement: 4.0
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Wrangler

ISO: '258/4.2L 3.895" Crank - #3727 Casting'

Postby drummergus13 » December 10th, 2016, 9:16 am

I am trying to build a stroker, preferably a 4.6L, but I have run into an issue finding a crank that doesn't cost $500+

If anybody has a crank they wouldn't mind getting rid of, I would gladly take it off of your hands! None of the junkyards around me, Craigslist, Facebook, KSL, etc. have one.

If I can't end up finding one, does anyone know of a decent build with a stock crank or 232 crank? The engine needs built and it's my daily driver.

There is so much knowledge and info on this forum that sometimes I can't even remember if I have found my answer yet or not, and browsing through history doesn't work with thousands of history pages... if you know what I mean!

Not trying to be a "give me your ideas so I can be lazy," I just have information overload and need to set it all straight.

thanks in advance for any help.

-Tanner

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IH 392
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Re: ISO: '258/4.2L 3.895" Crank - #3727 Casting'

Postby IH 392 » December 11th, 2016, 1:45 pm

Telling us your location will help us help you, last time this same issue came up I found the guy one on Craigslist 15 minutes from his location!
You can get more power out of ANY engine!!!
ASE Master certified engine machinist, gas and diesel

Russ Pottenger
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I love JeepStrokers.com!!
Posts: 537
Joined: August 15th, 2009, 1:27 am
Stroker Displacement: 4.7
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: ISO: '258/4.2L 3.895" Crank - #3727 Casting'

Postby Russ Pottenger » December 21st, 2016, 7:44 pm

The 232 3.500 "Mini Stroker" should definitely be considered for a low-cost upgrade from a stock 4.0 build.

With a cast 2229 piston and not touching the deck of the block you'll be around a zero deck with a 4.0 rod with a static around 9.4:1 to 9.5:1ish

It's what I call "no excuse not to build a stroker" engine kit.

Feel free to shoot me an email if you would like to get a kit quote with a freshly ground 232 crank.

Russ Pottenger
Bishop-Buehl Racing Engines
531 N. Lyall Avenue
West Covina, California 91790
(626) 673-2203
Email/PayPal: RussBnBracing@yahoo.com

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Cheromaniac
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Posts: 2506
Joined: March 8th, 2008, 12:58 pm
Stroker Displacement: 4563cc
Vehicle Year: 1992
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Cyprus
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Re: ISO: '258/4.2L 3.895" Crank - #3727 Casting'

Postby Cheromaniac » September 5th, 2017, 6:25 am

From my site:

If you all thought that the old AMC 232 I6 crankshafts were only destined for scrapheap oblivion, think again. There are plenty of them around and with a 3.500" stroke, you can use them to convert a stock 4.0L engine into a 4.2L mini-stroker. While it doesn't have the displacement of an AMC 258 crank-based stroker, the 258 cranks are becoming increasingly scarce and expensive so a mini-stroker offers a low cost alternative to more HP/TQ:

4.2L Milder mini-stroker

AMC 232 3.500" stroke crank
Jeep 4.0L 6.125" rods
Silvolite UEM-2229 +0.060" bore pistons
Increase piston dish volume to 24cc
8.8:1 CR
CompCams 68-115-4 192/200 degree camshaft
DIY ported HO 1.91"/1.50" 57cc cylinder head
Mopar/Victor 0.043" head gasket
0.040" quench height
Bosch 0280155703 injectors for '96-'04 engines
241hp @ 5000rpm, 293lbft @ 3500rpm

4.2L Wilder mini-stroker

AMC 232 3.500" stroke crank
Jeep 4.0L 6.125" rods
Silvolite UEM-2229 +0.060" bore pistons
9.6:1 CR
CompCams 68-235-4 210/218 degree camshaft
Russ Pottenger ported HO 2.00"/1.55" 62cc cylinder head
Mopar/Victor 0.043" head gasket
0.040" quench height
Ford 24lb/hr injectors for '96-'04 engines
268hp @ 5300rpm, 303lbft @ 3900rpm
1992 Jeep XJ 4.6 Stroker - 5MT - Sold 13/12/2016 :(
202rwhp 258rwtq (248bhp 311lbft crank)
Stroker build-up, Stroker "recipes"
2006 Ford Mustang 4.6 GT - 5MT - Simple bolt ons
310rwhp 328rwtq (351bhp 368lbft crank)


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