James_R 3 Posted May 18, 2006 In the changing charactersitics of an Mi thread, using a different pulley set up was mentioned. I've recently discouvered after digging about in a box of bits I've got a spare 4 pulley. I can't decide whether or not to use it though as the previous Mi on both "2" pulley went like stink, and the gearbox on the car is meant to be used on a revvy engine. so really I'm wanting to kow ho wmuch top end is sacrificed by unsing a 4 on the inlet? (this is on a XU10 block and XU9 Mi crank 2045cc bottom end, flowed 1.9 Mi head) Thanks for any input James Share this post Link to post Share on other sites
Man3 0 Posted May 18, 2006 I would say try it and see what you think, its not too hard to switch back to a number 2 pulley. Share this post Link to post Share on other sites
SweetBadger 94 Posted May 18, 2006 I'm running a 1.9 MI with standard cams and increased compression ratio. For me I thought the gain in bottom end grunt didn't justify the loss of top end power even with a 1.9 box. This might be a different story if your running uprated cams though. Like Man3 says, give it a try, it's not a big job to swap the inlet pulley... Share this post Link to post Share on other sites
nunoserrano 0 Posted May 19, 2006 [(this is on a XU10 block and XU9 Mi crank 2045cc bottom end, flowed 1.9 Mi head) did you haver drive a 205 whit a Mi16v engine ?? iff yes what is the difrence whit the Mi16v engine and the 2045cc ??? thanks Share this post Link to post Share on other sites
eddie_1.9 1 Posted May 19, 2006 I'd say try it and see what happens, as said. It's straight forward enough to swap them over. Think i'll have a go with a number 4 pulley too and see what happens. I feel a Wanted post coming on... Share this post Link to post Share on other sites
James_R 3 Posted May 20, 2006 I'll let you know later in the week I'm moving from a 1905cc XU9 to this new one, but only as a stand in while I put the new XU9 together. Share this post Link to post Share on other sites
B1ack_Mi16 67 Posted May 20, 2006 I'll let you know later in the week I'm moving from a 1905cc XU9 to this new one, but only as a stand in while I put the new XU9 together. It will really depend on what compression your're running. Putting the 4 pulley on the inlet vil give more dynamic compression, good to use on the 9.7:1 low-comp. Mi16 engine. If your new one will be higher compression it may be best to stick with (2) pulley on inlet, so it don't start pinking. Share this post Link to post Share on other sites
petert 588 Posted May 20, 2006 Whilst I haven't done it with a 10.4:1 engine and std. cams, I doubt it will hurt it. Plenty of people do exactly the same with vernier pulleys. Share this post Link to post Share on other sites
