Dear all,
sorry for bringing this matter up as it had probably been discussed before. We have an engine here (2L) that is supposed to get stroked. Now there are two stroker kits we have focused on:

1. The brian crower kit
2. The kit offered by ERL

The main difference between both kits is obviously the price. The latter uses a k24 crank shaft whereas the BC kit comes with a custom-made crankshaft. We are not really sure as to what extent the OEM honda crankshaft can be used for that rpm in conjunction with a 150hp nitrous shot, it would probably be a bit too much.

Now the BC kit on the other hand is more expensive, yet, BC assures us it will be the right thing for what we are up to and very durable. Anyways, when visiting the H22 guys on their forums it seems they have had difficulties with BC crankshafts for their engines.

Any suggestions and advice will be greatly appreciated.

Reliability with nitrous use and stock rpm redline are the priorities.

Thanks!

 

Stock crank will not break. It's bulletproof, unlike the rear end

 

Thanks for the info! I suppose you are referring to the oem K24 crankshaft..?

The problem is that the crankshaft (stock f20), that is in the engine, is bent. I realize the K24 one was made for more torque so it should be more durable in that regard.

Thanks!!

 

How did you manage to bend a crank?

 

At this stage we are guessing:

- Perhaps owed to an uncontrolled combustion / detonation (burning spark plug, nitrous). The burning spark plug may have ignited the mixture too early causing the explosion during the power stroke to collide with the piston on its way up.

- Another possibility is a significant flywheel imbalance, yet that imbalance might have resulted from the bent crankshaft.

- Something we haven't seen before were some sort of small "copper nuggets" all over the crankcase. These partially blocked some of the oil channels.

It seems as if one of the crankshaft bearings had a damage since quite a while. This may have been owed to the interrupted/decreased oil supply caused by the "nuggets".

The engine is not ours but we are dealing with the results now. We'll have everything measured in order to find out more and to check if the rods are bent too.


Anyways, the engine (block) is entirely dismantled now, hence it might make sense to look into more reliability and some extra torque and power.

Further input, ideas and suggestions are greatly appreciated.

Thanks!!

 

I would stick with the OEM Honda cranks. They are beautiful pieces and can take a lot of abuse. I trust the Honda forged crank over most aftermarket cranks. Its hard to believe the OEM crank was actually bent.

 

106mm or don't stroke it at all lol did you see the F27c threads?

 

im confused....did you seriously bend a crank shaft? I just cant wrap my head around that

 

Thanks, that post confirms my own opinion.

As I said, we'll have it measured in order to see how much it is bent. It is of course not as bent as a boxer's nose, yet we are sure it is bent. We are also sure that could be fixed but if the thing gets stroked that won't be necessary.

Thanks!

 

Is that supposed to be a humorous post? Sorry, I am german and don't know how to deal with humor.

Thanks for making the thread a bit diverting though.