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NOTES & REQUIREMENTS:
- Max bore .010 over size.
- Blocks come with 55mm babbit bearings but are made for
60mm. (can use roller bearings)
- Blocks require Comp Cams timing chains:
# 3154 timing chain
# 3173KT Adjustable timing chain
- Blocks require lifters:
# 8957-16 Std Hyd roller
#89-58-16 Solid roller
#15956-16 new short travel hyd lifter (with pre load of
.005, should give better RPM'S)
- Push rods should be measured after head and valve train
installation
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RHS Blocks
LS1
Race Inspired Design
- Designed from aircraft-quality A357-T6 aluminum
- Priority main oiling – galley moved outboard to accommodate up
to 4.600” stroke with standard rod pins (2.100”diameter) & oversized
60mm camshaft
- Raised cam centerline (.388”/9.86mm); 2 extra links in timing
chain – Timing sets available from COMP Cams®
- Bay-to-bay breathing improved with larger side window area &
increased windage passage under bores & around caps
- Available in standard & tall deck
heights with beefy deck thickness;
standard & tall deck cylinder sleeves
- 6 head bolt design with full water jacket around the
cylinders walls; large windows in the valley allow access to an
inboard 6th head bolt
- Block design includes large front & rear AN-12 side
feeds for serious dry sump setups
- Material for oversized lifters (accepts 1.060"
bushing for keyed lifters) with lifter bosses that are designed to
clear tie bar style lifters
To meet the growing
demand of today’s high performance engine builders and racing
enthusiasts, engineers at RHS® have recently designed an all-new LS
engine block for radical street and all-out racing applications.
Going beyond the limitations of other GM LS blocks, the LS Race
Block is available in both standard (9.240") and tall (9.750") deck
height combinations and is engineered for maximum clearance around a
4.600" stroke crankshaft. This was done by raising the camshaft
centerline (.388"/9.86mm) and including priority main oiling that
shifts the oil galley outboard. With this unique design, RHS®
engineers were also able to minimize windage in the rotating
assembly – leading to superior engine lubrication
at higher rpm.
To make it friendly for existing race applications, the
block contains both factory and motor plate race mounts for Gen I,
Gen II, Gen III and Gen IV engines. And for quality control
assurance, RHS®
conducts a CT scan (similar to a medical CAT scan) on each block to
ensure maximum precision and consistency. Combine that with more
standard features than any block on the market and you get the new
benchmark of LS power, strength and compatibility. |
