I'm was wondering how many people have some thing custom done to there crank as in Knife edging. I know benson will do that and I know RS does it. Everyone give me some personal expeirence, who you think makes the best crank. I'm not looking for a custom stroke crank but for like Knife edging.

 

Knife edging will give minimal gains, its used to shed the excess oil off of the crank under operation. It gives less parasitic drag on the crankshaft for marginally quicker revs, and marginal gains. Its a good idea in road racing conditions to keep the extra mass off the rotating assembly. You'll probably gain 1whp from it, if that. Stock is always nice.

 

I concur... generally its agreed upon that a stock crank and essentially stock bottom geometry as a whole is preferred. simplicity is a godsend.

 

Knife-edging for Honda cranks is more for removing rotational mass b/c VTEC motors already have a windage tray to keep the oil level out of the crank's way. The crankshaft probably never touches the oil in the pan.

 

How do the main and rod bearings get lubricated?

 

From the pressurized oil feed system, starting from the main saddles to the mains, then the rod journals.

If you shine a light from one side and look through the other side, the oil feed holes in the crank journals, you can see a circumferential crevice inside.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote">From the pressurized oil feed system, starting from the main saddles to the mains, then the rod journals.

If you shine a light from one side and look through the other side, the oil feed holes in the crank journals, you can see a circumferential crevice inside.</TD></TR></TABLE>

He said crevice. Hehehe. sorry guys.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote">The crankshaft probably never touches the oil in the pan.</TD></TR></TABLE>

You're joking right?

 

Prove me definitely wrong and then I'm joking.

 

what happens when the ticker hits 25 psi, and EVERYTHING inside the car that isnt properly secured splats against the rear window? The oil in the pan does the same thing, rides up the back of the pan, and into the spinning assembly Windage trays help a lil bit like you were saying, but the entire assembly still contacts the oil...

 

Thanks for the input guys, although I did already know what the reason for knife edging I was just seeing how many people have actually done it and it does lighten the rotating assembly alot so that would intern alow the motor to spin faster. I was just wondering how many people have used it for race application.

 

OK. You win. 4.5 to 5 qts of oil goes up higher than I thought.

 

knife edging usually done in Domestic V8's since they're crank are so low and it is drown in oil pan, by removing the excess materials out of each journals, it reduces the rotaional mass.

Honda cranks only have half as journal as V8's and it sits a little higher up to where you will see minimal gain.

stan

 

I received a knife edge once looked nice.