How much HP can the RD2 2.0L crankshaft take till its breaks , and wodnerin if say i was pushing 400HP who , where and cost on a aftermarket crank , i seen sum on kspec, but DAMN $$$$$$$$ and i dont know the goods on the Tigerlily products on kspec , any info would be great

 

The "aftermarket crank" I saw on KSPEC is a stock crank that has been knifedged and balanced. Not a stronger a/m one. That doesn't matter anyways because the stock crank will hold the power you throw at it anyways. Probably around 600 at least to be safe. Get to 400hp first, then worry about it. wink1.gif

 

yea i seen the OE ones on kspec the tigerlily one i just dont know if theres really anything differ about the 2

 

I believe speed camp finally broke theres at 750 before they dropped the beta

 

I think that 750 is more than any street tib will see... Knife edging and balancing is good for some "free" hp..

 

The part on the stock crank that breaks is the flywheel attachment end. It litteraly "spins" off the main crank shaft under high torque loads (around750 HP or similar ft/lbs). Needless to say, you shouldn't have ANY problem with that.

Knife Edging, when done properly can show gains, but it is usually reserved for V8 and V6 engines that have twice the countereights and throws of our I4. I'm not saying it's not worth it if you are building an "all out" motor, but chances are, there is HP to be had for less money elsewhere.

 

Knif edging is done not just because of the weight.. but because of "windage" the weights on the crank can literally "slap" the oil in the pan, slowing them down and frothing the oil.. knife edging gives them a sharp edge to "slice" through the oil, rather than slapping it..

Balancing is always good...