|
WE DO
NOT STOCK THIS ITEM.
IT WILL SHIP DIRECTLY FROM
THE MANUFACTURER TO YOU WITHIN A FEW DAYS AFTER YOUR PURCHASE.
THANK YOU.
Dart's new Special High Performance (SHP) 4-bolt
iron engine blocks are the most affordable and reliable
way to build your new small block Chevy engine! They are
machined on state-of-the-art CNC milling centers to
"blueprint" quality specs and are much stronger, with
better oiling and better cooling capacity than old factory GM
blocks.
Dart SHP
small block Chevy 4.125-bore features PN 31161211*
ALL DIMENSIONS LISTED ARE INCHES
·
New Dart SHP cast iron block, Chevy 350 mains only
·
This block is 4.125-bore (also available in
4.000-bore PN 31161111 same price)
·
0.230 thick cylinder walls @ 4.165 max.
recommended bore dia.
-
Stroke clearance - 3.750 as shipped (3.875 can fit with
grinding on block)
·
Decks are even and parallel to 0.002
·
4-bolt splayed ductile iron main caps (center 3)
·
True priority main oiling system
·
Siamese bores, max recommended bore dia. 4.165
·
Fits 81-85 small block oil pans w/ pass-side
dipstick, 2-pc RMS (1-pc RMS also available)
·
Blind head bolt holes to prevent water leaks
·
All threaded OE block holes for starter, clutch
ball, etc.
·
Accepts stock timing cover and stock oil
filter mount
·
Provisions for OE stock roller cams and lifters
·
If using aftermarket roller lifters, +.300 taller
lifters are required
·
Block weight before machining, bare: 175-lbs. +/-
5-lbs.
*Notes:
- All SHP blocks must be
finish-honed, cleaned and inspected before assembly.
- All clearances must be
checked prior to assembly.
- Block may require extra
machine work to establish desired clearances.
- Contact your engine
builder/machinist for details.
- Requires unique brass
freeze plugs, unique cam plug, unique cam bearings, unique
timing cover dowel pins, and unique oil pump dowel pins
available from Dart.
- Accepts standard size SBC
cylinder head dowel pins and transmission dowel pins,
which are not included.
- Requires extra oil galley
plugs in different sizes/quantities than stock SBC. No oil
galley plugs are provided with block or Dart parts kit.
All oil galley plugs must be purchased separately.
Balanced,
blueprinted, and fully machined and/or assembled blocks
and/or complete engines are also available direct from our
shop.
This is just a partial listing. Any engine combo
can be custom-tailored to fit your needs.
From mild-to-wild, the power experts at Hardcore
Horsepower, LLC have over 25 years experience and thousands of
dyno pulls to rely on to help you build an engine that'll make
your ride scream!
Feel free to contact us for technical advice or
for more info or to customize your kit accordingly.
Free Truck shipment to Commercial Addresses in
48-US states only.
Residential delivery extra $$$.
We
install and tune! Purchase this item and receive professional
in-house installation, initial set-up, and tuning at Hardcore
Horsepower, LLC!
TN residents add 9.25% sales tax.
Engines
may take approximately 4-12+ weeks to build. Final payment due
in full immediately upon purchase, excluding engines purchased
on Layaway plan.
Details
of full build and copies of all pertinent engine information
will be provided to buyer only. This item will include all
parts listed above, except where noted. Some products shown in
photos may not be included. Any/all products may be changed
without notice.
Hardcore Horsepower, LLC Warranty:
All products used in Hardcore Horsepower engines are protected
against defects in workmanship and materials by their original
manufacturer’s warranties. See Hardcore Horsepower Store for
more warranty details.
We offer
Ground shipping to the 48 states. AK, HI, and P.R.
shipping extra.
Feel
free to call for more info or to customize your kit
accordingly.
International
Shipping may be available for extra cost. Please provide a shipping
address for quote.
Photos shown
are representational only.
Actual
item may differ.
Hardcore Horsepower,
LLC
Franklin, TN
615/595-0060
10am-6pm Monday thru Friday
USA Central Time
Check out all of the other great deals available
in our eBay Store!!!
We Make It Go
Fast!!!
6/18/2009
DART Iron
SHP Small Block - Technical Notes
All measurements listed are inches
Part# 31161111 and 31161211
Material: Superior iron alloy
Deck Height
..................................................... 9.025
Bore
..................................................... 4.00 or
4.125 unfinished, 4.165 max recommended
Stroke
..................................................... 3.750
as-shipped (3.875 max recommended will fit with clearancing)
Weight .....................................................
175 lbs
Camshaft
Bearing ................................ SBC - 2.00,
Special coated, grooved, w/3 oil holes
Camshaft Position
.......................................... Standard SBC
Cam Bearing O.S. ......................................... +
.010, +.020, +.030
Cam bearing press
............................................. .002
Cam journal OD
................................................... Standard
SBC - 1.869
Cam
plug .............................................................press-in
2.106 (2-7/32 is closest)
Cylinder Wall Thickness, min.
................................ .230 @ 4.165 bore
Deck Thickness, min
.......................................... .675
Fuel Pump
.............................................. Mechanical
pump provision
Fuel Pump Pushrod
............................................. Standard
Length .500 dia
Lifter Bores
........................................................... SBC
.8427 - .8437
Lifters ........... Designed for factory 87-95
Hyd rollers, must use +.300 tall lifters if using link bar
lifters
Main Bearing Size
..................................................... 350
(2.45)
Main bearing bore
....................................................... 2.6405-2.6415
Main cap press .......................................................... .005
Main caps
.................................................................. Ductile
Iron
Main cap register
................................................. Deep
stepped register on each side (no need for dowels)
Oil system
...................................................................... Wet
Sump - Main Priority Oiling
Oil Pump shaft ......................................................... 350
main = Stock shaft (.481 OD)
Oil Filter
................................................................. Standard
SBC filter, requires 2 bolt filter adapter
Oil Pan ............................................................................... Standard
1980-1985 SBC oil pan
Rear Main Seal
................................................................................. 350
main - std 2-pc seal
Serial No.
..................................................................................... Left
front & main caps
Starter
.......................................................................................... Standard
SBC
Head bolt holes,
........................................................................... Blind
7/16
Timing chain/gears
............................... Standard SBC components,
will also accommodate 87-95 thrust plate
Timing Cover .............................................. Can
use stock cover
Weight
................................................ 175 lbs @
4.00-bore 165 lbs @ 4.125-bore
Torque Specs
...................................... Main Caps 1 - 5
7/16 bolts 65 ft lbs 2,3,4 outers 3/8 bolts 35 ft lbs
Standard SBC timing chain, timing cover, gear or
belt drive can be used.
Actual deck height will be .005- .010 taller for
additional machining requirements.
Cam bearing bores should be deburred before
installation.
When initially removing main caps, the caps &
block should be deburred before reinstalling. This will insure
that correct main size is maintained.
Standard SBC head studs or bolts may be used.
Head stud holes are blind. They do not go into the
water jacket.
A sealant/antiseize must be used on the head
studs. Loctite #620 is recommended.
Studs should never be torqued into block. They
should only be lightly snugged.
It is preferred that a bullet be machined on the
end of the head stud where it bottoms in the block to center
the stud before tightening. .350 OD x .150 Deep
Press-in freeze plugs are available.
Oil pump dowel pins should be .250 OD. Stock GM
pins are only .246 OD
This Block should be assembled only by
experienced, professional engine builders..
DIPSTICK: Chevy 1980-1985 is required, you will have to cut
off the area about 1-inch below the shoulder.
Dipstick Tube installation: If an oil dipstick
tube is used, after installation fill, the engine with oil and
remark the dipstick indicator Full mark if necessary. In
certain applications you may need to modify or bend the tube to
properly install it. The tube is a press fit.
LIFTERS
SHP blocks are designed to work with 1987-1995
Factory Hydraulic roller setups. Due to this, if you choose to
run a link bar lifter it will require the .300 taller lifters.
This is due to the taller lifter boss used for the factory
hydraulic roller setup.
OIL PUMP
Std SBC oil pumps are recommended, high volume
high pressure oil pumps are NOT recommended.OIL PUMP DRIVESHAFT
Std SBC 350 main oil pump drive shaft
Note: Be sure to check distributor to oil pump shaft
clearance with distributor, intake manifold and oil pump
installed on the block.
OIL PANS
1988-1985 Chevy pans are recommended, inquire with
pan manufacture for fitment for your application. Due to the
larger wider main caps it is best to test fit oil pan first to
verify clearance on the main caps.
PRIORITY MAIN OIL SYSTEM
Oil is directed to the main bearings first, then
to the cam bearings. There are NO provisions for oil
restrictors
NOTE: The fuel pump pushrod bore is machined for a .500
rod. Be sure to check the clearance because of the
inconsistencies in the diameters of push rods.
NOTE: Due to variations in lifter sizes and clearance
preferences, most of our Engine Builder customers prefer the
lifter bores sized on the small end of the specification.
Sometimes these bores will need to be lightly honed.
SPECIAL NOTE: With a multitude of different
crank, rod and piston combinations available it is important to
check clearance of all moving parts (especially crankshaft
counterweight to block) before attempting any type of assembly.
It is good engine building procedure to ALWAYS
check the fit of the distributor before any machining or
cleaning is done.
INSPECTION
Upon receiving this block it should be thoroughly
inspected for shipping damage.
Prior to machining and assembly please inspect the
following items:
Cylinder bores - Oil passages - Deck surfaces -
All threads
MEASURING & MACHINING
All initial measuring should be done before any
machining has begun.
Decks are CNC machined to standard deck heights.
If you need a particular deck height always measure before
machining.
Main journals are finish line-honed to the low to
middle of the specification.
They should be measured for your preference. If
you have need for a different diameter you must realign hone
this yourself.
Crankshaft & rod clearance should always be
checked before any machining is started. You need .060
clearance for rotating counterweights and rods.
Due to variations in OD dimensions of the numerous
lifter manufacturers, lifter bores are finish honed on the
tight side of the tolerance to leave room for lifters that are
larger than the standard.
WASHING
Final washing should be very thorough, paying particular
attention to all oil
galleys. Use hot soapy water and rinse with hot
water first, followed by cold water which helps reduces rust.IMPORTANT
Honing Procedures
Hone block to finished size with 220 grit @ 40
amps of load on Sunnen hone.
Make 3 strokes on each cylinder with 280 grit @ 20
amps.
Make 3 strokes on each cylinder with 400 grit @ 20
amps.
When rehoning start with 220 grit, get cylinder
straight and round or just deglaze. Then do same procedure as
above.
HONING OIL Sunnen MAN 845-55SPEED & FEED CK-10
(C&E) Pulleys
CV-616 185 rpm 50 strokes per minuteHONING 1)
Rough .003 rom size Sunnen C30A-25
2) 220 to size Sunnen C30A-55
3) 280 3 strokes Sunnen C30J-65
4) 400 3 strokes Sunnen C30J-85REHONE (deglaze) 1)
220 3 strokes Sunnen C30A-55
2) 280 3 strokes Sunnen C30J-65
3) 400 3 strokes Sunnen C30J-85
RA should be 26 - 28SHOE ASSEMBLY TECHNIQUE
Titanium or hard shoe (part# CK-3570) from Sunnen
on one side of honing head.
Delrin (engineering plastic) attached to brass
shoe holder & trimmed to size on other side. (Delrin bars
can also be purchased from your local plastic supplier)
*** DO NOT use bronze shoe ***
FRESH HONING OIL IS CRITICAL
These are only recommended procedures we have
developed through our Pro Stock program. Some engine builders
have their own procedures for honing our blocks.
All honing supplies listed from Sunnen Products
|