slowswap

Is there a difference in diameters of the crank pullies between LE5/L61 and the LSJ? Just trying to calculate supercharger RPM's if there is a difference in size.

Maven

iTrader: (1)

good question, i honestly dont know, but if there is its not a big difference.

slowswap

I'm just trying to calculate which supercharger pulley will bring supercharger up to max spike RPM at 7000 on the 2.4. If the difference is negligible, a 2.8 should be a good match up.

wesg631

im thinking they are alil different because on the swap arent you supposed to use a stage 2 belt? which is a bigger belt due to the smaller supercharger pulley on the lsj with the m62 so im guessing that the le5 has a smaller crank pulley than the lsj. This is the way i see it if i am wrong please correct me i don't want to give bad advice

slowswap

I was thinking it was smaller because it produces less boost given pulley per pulley, or at least this was my understanding.

wesg631

if it was smaller wouldn't it pull more boost because there would be fewer rotations that's why they make they smaller pullies

slowswap

Smaller on crank = less boost.

wesg631

that makes sense so my guess of it being smaller is true but how much ?

klotzy_550

iTrader: (1)

The reason that the LE5 produces less boost and also the same reason that the 2.2 produces less boost is not necessarily due to the crank pulley size, which are almost the same I believe, it is the fact that there is a larger volume that needs to boosted. 2 liters versus 2.2/2.4 liters. Sorry for bumping this thread I just saw it and figured I would throw my .02 in.