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-44003750P |
OHIO 3.750" Stroke, 3"(400) Main Forged Crankshaft-2.250"(Pont.) Rod Journal |
$714.95 |
RPM-DG3-455A400C |
RPM Pontiac 4.00" Stroke, 3" Main Forged Crankshaft-2.200"(BBC) Rod Journal |
Call Us |
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)
|
|
Pontiac 4.00" Stroke, 3.25" Main Forged Crankshaft-
2.200" BBC Rod Journal
|
|
RPM-DG3-455B400 |
Pontiac 4.00" Stroke, 3.25" Main Forged Crankshaft-2.250" Pontiac Rod Journal **Straight Shot Oiling** |
Call Us |
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."
