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2.85L
Hybrid Stroker Engine Build
I love the idea of developing reliable,
large displacement motors at a reasonable
cost. This build is based on a design
developed by Sid McMullen. The motor
will be used mostly for street use with
occasional track days. I had some very high
goals for the build:
- 400 rwhp/400 ftlbs torque at 6200rpm
- Near k26/6 bottom end performance
- Total cost under $4200 for everything,
including my "High Flow" head
- Using 86 Block, dry sleeved, bored to just
over 102mm, half filled
- JE Small Block Chevy Pistons, Forged 4032
- Eagle 150mm Mitsubishi Rods
- 86 2.5L crank, offset grind, 86mm stroke,
cross drilled
- Compression Ratio is 8.1:1
- ARP Head Studs
- Cometic MLS Head Gasket
- ACL Race Rod Bearings
- Crank Scrapper
- Stock Cam
- MoCal 13 Row Additional Oil Cooler, 235 mm |
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2.5L Block |
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Cast Iron Dry
Sleeves, Block Half Filled with Moroso Block
Filler |
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Eagle Mitsu
Rods, JE Small Block Chevy Pistons |
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Modified Rods to
Use 0.927 SMC Wrist Pins |
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Assembled Rods
and Pistons |
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Gapping the
Rings |
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2.5L Crank
Off-Set Grind to Produce 86mm Stroke |
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Small Mitsu Rod
Journal Size |
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Crank Scrapper
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Filled Block to
Stabilize Cylinders |
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ARP Head Studs
Torques to 87 FtLbs |
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103 mm Cometic
MLS Head Gasket |
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Checking Valve
Clearance |
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Nearly Completed
with Engine Assy |
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Completed 2.85L
Motor |
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LR Semi-Solid
Engine Mounts |
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Engine Bay
Before Cleaning |
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Engine Bay After
Cleaning |
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Getting Ready to
Install the Completed Motor |
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Finally Back in
the Car |
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Ready to Go |
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