Hello everyone, I'm a bit confused on what steps to take for the bottom end. I would like to hit 9k rpm.
I'm running a b16 ITR head with the full supertech valve package and titanium retainers, skunk2 tuner 2 cams.
What I'm confused about is if the stock ls crankshaft can handle being daily driven and hit 9k often. If I were to use the stock ls crank, I'd use scat connecting rods, arp rod bolts, and p30 pistons meant for the ls crank. If I can't use that, should I do a similar setup but with the gsr crankshaft?

 

You don't do this for just the sake of 9,000rpms. If it doesn't make power close to that rpm level, then you stop at the rpm that it is able to make the best power band. Either crankshaft can do this if properly prepped and balanced with the rest of the engine, regardless of company rods being used

 

So which one helps with power that high?

 

Shorter stroke slows piston speed... allowing for higher peak engine speeds. Since the B18C and B18B crankshafts have only slightly different strokes, there will not be a dramatic difference in peak RPM potential. As TheShodan stated, you do not have enough compression or camshaft to reach that RPM, so the crankshaft choice is immaterial. Remember that the higher you rev an engine, the faster parts wear out. It may be cool to rev an engine to 9K, but 8K is much better for long-term reliability. You have to decide which is more important: Higher revving or living longer.

 

Like I stated... Neither. Especially since you don't have supporting equipment and tuning to make revving that high a rational idea

JRCivic1 pretty much summed it up. Think of your purpose before just getting into trying to "rev high".

 

I'm not the OP.

 

K. Doesn't change the point... For whomever reads it.

 

I'm not trying to be ignorant I'm new and have no idea what steps to take for building this thing, I'm taking my time with it and trying to do extensive research. I don't have any help but yeah thanks for the responses I guess

 

well..you stated that you would like to "hit 9k rpm" with no reasoning.
find out what you would like to do with the car and what your goal is..then someone will be able to help you or point you in the right direction.

your statement just tells us your goal is to take the car to 9k (constantly)
and your question is what crankshaft is needed to do so.

any crankshaft is able to do so.

 

It's understandable when new people don't realize when they've actually received help. What needs to be understood is that You have to focus on understanding and answering the underlying question that emphasizes your initial rpm question.. Once you do that, then you'll understand a bit better as to why your RPM question isn't really a necessary question to worry about.

It was answered. Just read it again.. :-)