I want to get my B20B crankshaft lightened. I found a local shop that lightened some VW crankshafts before and they asked me were they should take off the material. Only on the counter weights or also on the sides and so on.

Can someone please post a pic of a lightened crankshaft?

How much should they take of? 5 lbs? 10 lbs? Can the crankshaft still handle 400 whp?

 

if they are asking you where they should take the material off, i wouldnt trust them. it is usually taken off of the counter weights though. lightening your crankshaft is really not a "Bang for the Buck" modification. its pretty much useless.

 

In such a small motor as the B series honda motors lightening a crankshaft is a complete waste of money (like the post above just said).

The only thing you could do for that crank is Knife it which is still somewhat of a waste of money because the only way your going to be able to feel any sort of HP out of that is if your pushing big number horses (IE 7-800+ hp) and every little thing counts...all the way down to where the crank is picking up added resistance from sloshing around oil and picking up strings which dont break apart untill a certian point because of the viscosity of the oil. Believe it or not but at about 8,000 rpms that crank has millions of strings of oil attached to it and that is somewhat weighing it down, in terms of rotational mass.

You can go through the trouble of doing this if you wish but i still think knifing a crank if your only pushing 3-400hp is still overkill. But also if your machinist has to ask you questions about what to do to your materials then they have no clue what they are doing and you should not be taking your **** to them.... My .02

-Shawn D

 

Thanks for your replys.

I got a great deal on a new 89mm Eagle crankshaft. I paid $515 at CNC Motorsports.