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

AMX's, Gremlins, Pacers, Ramblers, Eagles etc.
drummergus13
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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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Stroker Displacement: 4.7
Vehicle Year: 2000
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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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Stroker Displacement: 4563cc
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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 :(
Stroker build-up, Stroker "recipes"

Russ Pottenger
I love JeepStrokers.com!!
I love JeepStrokers.com!!
Posts: 559
Joined: August 15th, 2009, 1:27 am
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Vehicle Year: 2000
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Vehicle Model: Cherokee

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

Postby Russ Pottenger » October 3rd, 2017, 11:10 am

When doing a search for a 232 crankshaft keep in mind you'll need to get the later crankshaft produced between 72-79 casting number 3214722. What differentiates this from the earlier crankshaft produced in the years between 64-71 is that the rear Crankshaft flange has a centering ring where is the early crank has a flat flange.

I currently have them in stock for anybody that is not able to obtain one. A clean maged and freshly ground crank will cost you $200.00 plus shipping.

Thanks,
Russ Pottenger
Bishop-Buehl Racing Engines
531 N. Lyall Avenue
West Covina, California 91790
Work (626) 967-1000
Cell (626) 673-2203
Email/PayPal: RussBnBracing@yahoo.com

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SkylinesSuck
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Location: Northern VA

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

Postby SkylinesSuck » October 3rd, 2017, 4:38 pm

Just curious, are the SCAT cranks easy to get, and how much do they run?

Russ Pottenger
I love JeepStrokers.com!!
I love JeepStrokers.com!!
Posts: 559
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 » October 5th, 2017, 10:42 am

SkylinesSuck wrote:Just curious, are the SCAT cranks easy to get, and how much do they run?

Chris,

Always in stock ready to ship.
I sell them for $430.00 plus freight to you.
For an additional $120.00 I'll balance and polish.

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SkylinesSuck
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Stroker Displacement: 4.6L
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Vehicle Model: Wrangler
Location: Northern VA

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

Postby SkylinesSuck » October 5th, 2017, 1:04 pm

Not bad. Not much of a cost difference in the long run for 4.2 vs 4.6. Would you consider them worth the extra coin over a factory 258 crank?

Russ Pottenger
I love JeepStrokers.com!!
I love JeepStrokers.com!!
Posts: 559
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 » October 6th, 2017, 10:24 am

SkylinesSuck wrote:Not bad. Not much of a cost difference in the long run for 4.2 vs 4.6. Would you consider them worth the extra coin over a factory 258 crank?


I've never had any issues with the stock 258 crank.

I'd certainly love to sell new Scat Crankshaft's,
But in my opinion it ultimately becomes a price point and convenience factor. If and when I'm able to locate a 258 crank from my core supplier "My cost" is currently $144.00 which has doubled in the last five years. If anybody's paying more than that they need to factor in a mag and grind plus a $35.00 spacer if it has the long 2.500 snout. It can start adding up.

10 years ago the crank grinders were throwing them away. Can years from now companies like Scat maybe your only choice.

The good news is I'm hoping in a few months I'll have my new 12 counterweight Crankshaft's finished ready to ship.
I'll post pricing soon as I have it worked out.

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SkylinesSuck
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Posts: 280
Joined: February 14th, 2009, 11:11 pm
Stroker Displacement: 4.6L
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Northern VA

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

Postby SkylinesSuck » October 6th, 2017, 10:42 am

Very cool! I look forward to seeing it!

So in reference to the Scat crank, sounds like not much benefit other than being new.


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