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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 4.000-bore features PN
31161111*
ALL DIMENSIONS LISTED ARE INCHES
·
New Dart SHP cast iron block, Chevy 350 mains only
·
This block is 4.000-bore (also available in 4.125-bore PN
31161211 same price)
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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
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4-bolt splayed ductile iron main caps (center 3)
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True priority main oiling system
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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)
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Blind head bolt holes to prevent water leaks
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All threaded OE block holes for starter, clutch ball, etc.
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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
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