Toddman 0 Posted April 25, 2006 I need some hard facts here folks What are the differences between the cat and non cat mi engines? I beleived it was mainly the CR which was due to lower height pistons and that the cams are the same but the pulleys are different and then of course the ecus vary. I have now been told by an overseas member of BX 16v that the heads and cranks are different but sadly I only have D6C engines in pieces in my garage. Can anyone point out the facts please. Cheers Luke Share this post Link to post Share on other sites
Super Josh 4 Posted April 25, 2006 Well, the parts CD only lists one type of head and crank for the XU9J4. I believe it is all of the differences that you list, Luke. I was lead to believe that the valve springs are different, although the parts CD only lists one type I can't see why Pugeot would use a different crank and head, when the compression is lowered with the pistons. Josh Share this post Link to post Share on other sites
B1ack_Mi16 67 Posted April 25, 2006 Head and crank is definately the same. The only physical difference is the pistons and inlet cam pulley. Share this post Link to post Share on other sites
d-9 0 Posted April 25, 2006 Whats different about the inlet cam pulley? Is it a different number, if so which one? Share this post Link to post Share on other sites
Toddman 0 Posted April 25, 2006 Whats different about the inlet cam pulley? Is it a different number, if so which one? D6C has #4 inlet and #2 exhaust DFW has #3 inlet and #2 exhaust That is how I beleive it to be anyways Cheers Luke Share this post Link to post Share on other sites
d-9 0 Posted April 25, 2006 some D6Cs had no2 on both, my current one for example. Share this post Link to post Share on other sites
B1ack_Mi16 67 Posted April 25, 2006 some D6Cs had no2 on both, my current one for example. As I've understood it most D6C have (2) pulleys on both cams, and some of them have the (4) pulley on the exhaustcam. Share this post Link to post Share on other sites
Toddman 0 Posted April 25, 2006 As I've understood it most D6C have (2) pulleys on both cams, and some of them have the (4) pulley on the exhaustcam. Oh bugger I have 2 standard heads here with #4 om inlet and #2 on exhaust. I have heard that a few people have #2 om both though. Cheers Luke Share this post Link to post Share on other sites
d-9 0 Posted April 25, 2006 no4 inlet seems better (comparing my old engine with my new engine). Share this post Link to post Share on other sites
B1ack_Mi16 67 Posted April 25, 2006 no4 inlet seems better (comparing my old engine with my new engine). Ok, that's probably right then, as I've never seen an (4) pulley, yet... Share this post Link to post Share on other sites
petert 587 Posted April 25, 2006 As said, the pulleys are different (for the better) but has less compression, 9.7:1. Well they're supposed to be, but are in fact closer to 9.5:1. There are small differences in the head castings. You can see a difference around the plug in the chamber between two different castings, but is more likely from different suppliers rather than a different head. I suggest you read this thread in regards to my opinions on using the various combinations of pulleys: http://forum.205gtidrivers.com/index.php?showtopic=57143 Share this post Link to post Share on other sites
