ls vtec

Originally posted by 96coupe
2. Add oil squirters. These are present on VTEC engines but not non-VTEC engines. They help cool pistons and improve cylinder lubrication. These are important when it comes to improving engine longevity at high revs.

As for rod ratio, consider that the B18C5 really does not have a great rod ratio. Like the GSR, it is only 1.58:1. A stock LS or B20 bottom end has a rod ratio that is 1.54:1. This can be improved to 1.58:1 by using a B18C crank. This destrokes the engine by about 50cc. But you will still have over 1900cc displacement - quite a bit more than a B18C5.

I agree with everything but these 2 points.
oil squirters are in the vtec head, not the block. by doing a vtec head, you have the squiters.

rod/stroke ratio is a bunch of talked about bullshit. there's chevy v8's with 1.2:1 r/s ratios revving to 9000 all the time under race conditions. ever hear of nascar?

thats the whole point to using the ls crank/bottom end- the stroke. throw the gsr or b17 crank on it- and well, you might as well have done a straight b17a or b18c, cuz you just lost all the displacement.

as for comparing an ls/vtec to a b18c specR, there is no comparison. the R motor owns an ls/vtec is all aspects.