That CoolsideII is badass!! That's the sort of truck they should produce!! There always seems to be great concepts that never come true...but someone gets to keep these things!!

 

The engine in that CoolsideII is not a 8.1L. They very different from the old BBC. I talked to guy that has swapped a 8.1l into a 6.0hd truck. He said it dropped right in and every thing plugged up. He used the 6.0 computer and tuned with ls1edit.

 

Three words for you

"Little Aftermarket Support"

but big on the cubes though. Not like the third gen sc, call up and have a set of ported heads for $1500 or less. main reason why.

 

lsx based big block??????? hhhmmmm is it even a possibility to build something like that? What is the bore diameter on the 8.1

 

That ls1 C5R block is supposed to be a bad bitch able to put out some serious cubes. I think it is over 427 because at HPE they have a vette that has 435 or something like that.

 

its still a small block imagine a bored and stroked big block, it would be like a super stock motor over 9 liters making 700 at the wheels NA

 

Well the article i have on it says "modified" 8.1L wonder what they did to it here is what it reads.......

Specifications:
Chevrolet Coolside II
Two-passenger, two-door pickup truck
Front-engine, All-Wheel Drive

Engine Type and Size:
- Modified big block Vortec 8100
- Iron block / aluminum head 16 valve OHV V8 engine

Horsepower (hp):
575 @ 5700 rpm

Torque (ft./ lbs.):
605 @ 4500 rpm

Other Drivetrain:
- Viscous, fulltime engagement transfer case
- Solid rear axle
- Frame mounted front differential

Transmission:
4L80HD-E four-speed automatic


Chassis:
- Independent, coil spring SLA front suspension
- Hotchkis drive leaf spring rear suspension
- Front disc / rear drum brakes with ABS

Cylinder Heads:
- GM Performance Parts aluminum Gen V/Gen VI
- 127 cc Combustion chamber volume
- 2.25" INTAKE, 1.88" exhaust valves
- Cylinder head bolts, 11mm x 7/16" (wheel to wheel)


Induction:
- Two-piece tuned runner intake manifold assembly
- Oval bore throttle body
- Fabricated dual air cleaner system


Exhaust:
- Fabricated stainless steel four into one tubular headers, 2½" x 34" runners into 3" collectors (wheel to wheel)
- Fabricated dual 3" stainless steel exhaust system
- Dual 304 series 3" intlet and outlet mufflers

Wheels and Tires:
- Budnik 'Famosa' 18"x10" wheels
- Eagle F1 GS 295/45ZR-18 tires

Width:
63.8 in front / 64.9 in rear track

Wheelbase:
119 inches

Weight:
Total
4672 pounds
Front (estimated)
2962 pounds (63.4%)
Rear (estimated)
1710 pounds (36.6%)

Body / Interior:
- Regular cab
- Sportside box
- Custom black paint job with multi-hued flames
- Increased height tailgate
- Molded front air dam with 2000 Tahoe Z71 fog lamps
- Aluminum core tonneau cover
- Custom black leather seats and door trim with red perforated leather inserts
- Black and red leather trimmed steering wheel

0 - 60 mph:
5.55 seconds

1/4-mile time:
12.88 seconds

1/4-mile speed:
106mph

We all remember this truck the 496HDSS. I think it was the first 8.1L swap.

 

GM should put the Cadillac v-16 in a truck. Then Ford and Dodge will be all the way back to the drawing board.

 

The 8.1 gen 6 (496)is a 4.250 bore 4.375 stroke from what I best remember. The confusion on the gen 3 8.1 would be it being a 4.310 bore 4.250 stroke. A .060 over 427/454 with a 4.250 stroke with 496 cubes. Very common stroker BB. That is most likely the case with the truck above IMO.

 

Most don't know that 8.1L are very different from ether BB. I'm tired of spelling out all the differences. There's just not allot of support or info for it. I will say this, my new combo is running better than I thought. I ran a 13.80et mustang last night. If I ran my track shoes on (aka 120lbs less wheels and tiers) it would have been a dead heat. There's still allot of tunning to be done to this truck.