2.5L Rocket Stroker Engine Kit with 6 Speed Transmission (R&D)

R-III-R Turbo said:

neither dude, much stronger than either of those, it's cut down from a lump of billet steel, polished and nitrided

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Wo I can hardly breath

Thats a $58,000 crankshaft. With no profit. Bit steep for me...

Just out of curiosity, was (or can) the front of the crank drilled and tapped to accept a fastener for a supercharger drive pulley.....

Saves that problematic step for the few considering going all out with a stroker/supercharger combo.

Idaho Red Rocket 3 said:

WOW ! What will it cost when you get the kits together ?

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Until it's in the engine running, road tested, we won't know the final score, but you're looking at TTS or Carpenter Racing package level price

Gregger said:

Just out of curiosity, was (or can) the front of the crank drilled and tapped to accept a fastener for a supercharger drive pulley.....

Saves that problematic step for the few considering going all out with a stroker/supercharger combo.

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Excellent question. I had originally specified an integral stud - would be better than a perfectly drilled stock crank with a balance welded stud.

However it became apparent that with the weight of the crank was too much to be spinning it on a 12mm x say 80mm long stud, when machining down the crank, it would flex etc. So we went with the M12x1.25 bore like you would have with a TTS kit.
Only 20mm deeper to take a longer bolt or stud. And drilled perfectly on & parallel to crank axis.

Thought was also given to beefing up the bolt/stud from TTS M12 to M14, but that left no wall between it and the timing gear key slot.

While we're at it, the 2 pressed-on crank gears were going to be integral too, but this drove cost up so much I said nuts to that let's just weld the stock ones on.



That goldy flaky stuff is just cardboard fibers from packaging.

First of the custom made parts for the 6th gear upgrade landed, just some laser cut splined thrust washers.

They fit the OEM input shaft really well, I'm pleased.
Now to get them electropolished

Savin' my pennies . . .

Yeah I need my motor to fail so I can justify all this to wife for new 2018 Rocket....lol

BDClone said:

Yeah I need my motor to fail so I can justify all this to wife for new 2018 Rocket....lol

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Tell here that because you had to carry her extra weight as a pillion, Triumph wouldn't warrant the engine failure. Hence the need for the stroker kit......

Think she will bite

Gregger said:

Tell here that because you had to carry her extra weight as a pillion, Triumph wouldn't warrant the engine failure. Hence the need for the stroker kit......

Think she will bite

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She doesnt ride... never been on it

very interested in a 6th gear