I'm tring to find out the rod/stroke ratios for the SR20, CA18, KA24det, RB26dett, and any other nissan motors that will go in a 240. I'm trying to do the math to figure out which engine stroke would work with my car's rod to increase rpms, but I'm having trouble finding these engine ratios. Any help is greatly appreciated. Thanks.

 

SR is 1.585 and the KA is 1.72, dunno about the RB and CA though, but if you want to increase rpms in a motor the rod ratio is the last thing you need to worry about or even worry about at all unless you're extremely **** about it...

 

I know it's easy to increase revs in other ways, but if you do it the way I'm talking about you can increase rpm without losing the torque of the KA just by changing the stroke and machining the difference off the head- the best of both worlds. And yes, I am **** about it.

 

So what exactly are you planning to do?