Can you I.D. this crank.....

[BURN-BROS]

Good morning all!

Today is show and tell. I bought this crank off of the Pelican classifieds yesterday and it is a beauty. Take a look!

It was described as a 935 9bolt crank 66mm stroke. Allthough it appears to be a factory race crank, there are a few things that don't jive.

1. part #961 102 014 00

2. roll pin for an indexed flywheel (motronic)

3. 66mm stroke (verified)


Do any of you historians have a clue?

Here are my guesses;

961 (racing version of the 959) Can anyone verify stroke?

956

962

What was the stroke of a 961(race version of 959)?

I wont rule out the 935 because you never know....

anyway, thanks for the help and enjoy the pics!

[Wayne 962]

I saw that on the classifieds, and I immediately didn't think it was a 935 crank, but a 962 one instead, just looking at the description. These are somewhat "common" if you can say that, as I believe that they are still semi-readily available from the factory.

Looks like a 962 crank to me...

-Wayne

[Wayne 962]

Oh, FYI, for the masses, this crank is special because it allows you to build a short-stroke, under 3.0L engine using the 3.0/3.2/3.3 aluminum engine case. Good for making an engine that needs to fit into a specific engine class.

On the other hand, the same thing can be achieved using a Euro Carrera 3.0 engine case and an early 66mm crank. The difference is the flywheel mounting - the six bolt versus the nine bolt. This later-style crank is best for putting that under 3.0L engine in a late-model car like a G50 or so. The Euro Carrera case is best for use wtih a 901. 915 cars can use either option.

-Wayne

[BURN-BROS]

Here is some info I found. FYI


Engine for the 956


Engine Type: Air Cooled Twin Turbo Flat 6
Type 935/76 (for late season 1982)

Displacement: 2649 cc********
162 cu. in.

Power: 650 hp @ 8200 rpm
485 kW @ 8200 rpm

Torque: 450 lb. ft. @ 5400 rpm
611 Nm @ 5400 rpm

Horsepower per Liter: 245.4 hp/L

Compression Ratio: 7.5 : 1

Valve Configuration: 4 valves per cylinder, DOHC

Bore: 92.3 mm
3.63 in

Stroke: 66.0 mm *********
2.6 in

fits the 935 description

----------------------------------------------------------

The 962 engine

Engine Type: Twin Turbocharged Flat 6
Type 962/72, KKK Turbos
Longitudinally mounted
Alloy block and head

Displacement: 2994 cc
183 cu. in.

Power: 780 hp @ 8200 rpm
582 kW @ 8200 rpm

Torque: 524 lb. ft. @ 5000 rpm
711 Nm @ 5000 rpm

Horsepower per Liter: 260.5 hp/L

Compression Ratio: 9.5 : 1

Valve Configuration: 4 valves per cylinder, DOHC

Bore: 95.0 mm
3.74 in

Stroke: 70.4 mm ******
2.77 in


--------------------------------------------------------------
The 961(race 959)

This is very interesting, Different stroke than the production car and correlates eith the crank #

EngineEngine Type: Air Cooled Twin Turbo Flat 6

Displacement: 2847 cc......this doesn't jive for a 94mm bore. Should be 2747cc or 2807 with 95mm bore....So info is a little suspect.*****
174 cu. in.

Power: 640 hp @ 8200 rpm
477 kW @ 8200 rpm

Redline: 8200 rpm

Horsepower per Liter: 224.8 hp/L ***nice!

Compression Ratio: 9.1 : 1

Valve Configuration: 4 valves per cylinder

Bore: 94.0 mm
3.7 in

Stroke: 66.0 mm****************
2.6 in




There were other displacements for the 962 of 2.6 liters so thats a possible application as well.
I got these figures from flat6.net btw