help to identify the stroker kit hks.

[frakzz]

is it step 1 or 2?

the crankshaft weighs 24.5kg

some problem with loading pictures, added them in the following message

 

 

Edited October 30, 2020 by frakzz
Erroe code: EX0 on loading pictures

[frakzz]

 

Edited October 30, 2020 by frakzz

[SiR_RB]

I know step 2 has coated pistons 

 

so that most Proberbly is a step 0 or 1 as a guess 

 

[frakzz]

stroker used, coated pistons, coating left on the sides, they seem to be step2
I'm more interested in the crankshaft) a seller in Japan invoiced step2, but I have doubts

[SiR_RB]

Sorry then I have no idea 

visually step 0,1,2 cranks “look” the same 

 

unless there is a specific number on the crank u can send to hks 

[BK]

Does that "star 1" marking on crank not mean step 1 ? Ask HKS direct.

[frakzz]

hks wrote

Quote

we are not providing a service to identify the product based on photos.

 

my friend also has an hks crankshaft, he did not do any machining of the crankshaft and I saw the same photos on the Internet. he has a box with the date 04/05. step2 is written on it
it weighs 22kg and looks like this

I also found this message

 

also on yahoo japan other crankshafts, more machining, think weight 20kg

 

can't define, it's all confusing

I think to lighten the crankshaft by 2-3 kg, but I don't know if it's worth it.

Edited October 31, 2020 by frakzz

[GTSBoy]

Perhaps if we understood why it matters to you.......

[frakzz]

I want to understand the HKS recommendations for power and rpm.
in addition, the crankshafts have different hardening layer thicknesses (different technology). for step1 layer 0.2-0.3mm and for step2 1mm

[The Bogan]

Piston pin size is apparently different as well between 2 and 3.

[SiR_RB]

My understanding is (I’m sure I’ve read it online somewhere aswell maybe rhdjapan)

step 2 is a lighter crank

so if yours weighs around 24kg and the step 2 you found online is around the 20-22kg mark then I would assume urs is a step 1

 

[BK]

Correct step 2 is lighter than the step 0 / 1 (same) crankshaft.

11 hours ago, frakzz said:

I want to understand the HKS recommendations for power and rpm.
in addition, the crankshafts have different hardening layer thicknesses (different technology). for step1 layer 0.2-0.3mm and for step2 1mm

Who cares really, as the HKS step 0, 1 and 2 are all forged cranks, step 3 the overpriced but best billet one is now discontinued and a Spool billet 77.7mm stroker crank is cheaper (and better) than all of them.