4340 Forged Crankshafts

Butler Performance offers Pontiac 4340 forged cranks from top manufacturers in a variety of sizes, and include the latest in oiling technology. Forged Cranks offer a tremendous advantage in strength and durability over cast cranks. This is very inexpensive insurance to protect your engine and  even if not necessary at your power level now, upgrading to a forged crank to build a solid bottom end will give you the option to safely upgrade power later.

Some cranks offer standard oiling(noted in description) while others offer Straight Shot Oiling.

Most Forged crankshafts require narrowed Performance or Race bearings because of the larger radius’s on the cranks main and rod journals. (Example FMP- M or CH series or C77 H or HN series)

We have complete balanced rotating assemblies using these cranks. If you don't see the combination you want, contact us and we will put it together for you.

 

3.00" main 4340 Forged Cranks (for 326/350/389/400 and aftermarket blocks

 

Part #
Description
Price
OCR-44003750
OHIO 3.750" Stroke, 3"(400) Main Forged Crankshaft-2.250"(Pont.) Rod Journal
$649.95
RPM-DG3-455A400C
RPM Pontiac 4.00" Stroke, 3" Main Forged Crankshaft-2.200"(BBC) Rod Journal
$729.95
EAG-CRS440042106625
EAGLE 4.210 stroke 3.00"(400) inch main Forged Crank , 2.250"(Pont.) rod journal (standard oiling)
$739.95
EAG-CRS440042506700
EAGLE 4.250" Stroke, 3" Main(400) Forged Crankshaft-2.200"(BBC) Rod Journal (standard oiling)
$739.95
EAG-CRS440043506700
EAGLE 4.350" Stroke, 3" Main(400) Forged Crankshaft-2.200"(BBC) Rod Journal (standard oiling)
$739.95
EAG-CRS440045006800
Pontiac 4.500" Stroke, 3" Main 4340 Forged Crankshaft-2.200" (BBC)  Rod Journal (std oiling)
$739.95
SCA-4-400P-4500-6700-220
SCAT 4.500" Stroke, 3"(400) Main Forged Crankshaft-2.200" (BBC)Rod Journal
$799.95
OCR-44004750 
Pontiac 4.750" Stroke, 3" Main Forged Crankshaft-2.200"(BBC)Rod Journal
$694.95

EAG-AR100

Armor Coating for Eagle Cranks
(Can be added to any Eagle crank)

$178.95

 

3.25" main 4340 Forged Cranks
(for 421/428/455 blocks)

 

RPM-DG3-455B400C
Pontiac 4.00" Stroke, 3.25" Main Forged Crankshaft-
2.200" BBC Rod Journal
Contact Us
RPM-DG3-455B400
Pontiac 4.00" Stroke, 3.25" Main Forged Crankshaft-2.250" Pontiac Rod Journal **Straight Shot Oiling**
$729.95
EAG-CRS445542106625
EAGLE 4.210" stroke 3.25"(455) inch main Forged Crank, 2.250"(Pont.)-rod journal (standard oiling)
$799.95
EAG-CRS445542506700
EAGLE 4.250" stroke 3.25"(455) inch main Forged Crank , 2.200"(BBC) rod journal (standard oiling)
$799.95
EAG-CRS445545006700
Pontiac 4.500" Stroke, 3.25" Main 4340 Forged Crankshaft-2.200" (BBC)  Rod Journal *std oiling*
$799.95
SCA-4-455P-4250-6700-220
SCAT 4.250" Stroke, 3.25"(455) Main Forged Crankshaft-2.200" (BBC)Rod Journal
$799.95
SCA-4-455P-4500-6700-220
SCAT 4.500" Stroke, 3.25"(455) Main Forged Crankshaft-2.200" (BBC)Rod Journal
$799.95

EAG-AR100

Armor Coating for Eagle Cranks
(Can be added to any Eagle crank)

$178.95

4.25 OR 4.500 CRANK CLEARANCE

This picture shows the only area that normally needs to be clearanced to put either a 4.25" or 4.500" stroke crank in a Pontiac 400 block- although any new part should be installed and all clearances checked prior to final assembly because of factory production variances.

Below is taken from an article from Popular Hot Rodding Mag Oct. 07 issues

"It's been 30 years in the making, but Pontiac enthusiasts now have both aftermarket cast and forged cranks at their disposal. In the late '90s, Butler Performance teamed up with Eagle to produce the first aftermarket Pontiac crank, a cast-steel 4.250-inch unit for 3-inch main 326/350/389/400 blocks. Just this year, Butler Performance released 4340 forged cranks in 4.000-, 4.250-, and 4.500-inch strokes for 3-inch main blocks. The company also offers 4.000- and 4.250-inch 4340 cranks for 421/428/455 blocks with 3.25-inch mains. "Before we released these cranks, the only option was offset grinding a stock crank, which netted an extra 4 to 5 ci," David Butler says. "Forged cranks are so reasonably priced these days, there's no reason to even bother with a stock piece."


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