acox99 74 1 Cars Posted January 15, 2007 I have searched the forum and the net, and i cant find any high performance bearing sets for the MI, i want something thats going to take a lot of stick, and constant high reving, the last thing you want to do is spin a shell. Can anyone help Ali and Alan Share this post Link to post Share on other sites
Ahl 4 Posted January 15, 2007 Have a read of this post Share this post Link to post Share on other sites
Sie 0 Posted January 16, 2007 1.9 GTI are the same bearing as the XUD9 , K.S part No 77097608 . No heavy duty lead copper or silicone bearings have ever really been available as the standard material is good enough to cope . Only a few bearing manufacturers produce these bearings so whatever bearings you buy will be a good quality bearing . Hope this helps Share this post Link to post Share on other sites
acox99 74 1 Cars Posted January 16, 2007 ok cheers for the advice standard bearings it is then, do you recommend you replace them every season? Share this post Link to post Share on other sites
Sie 0 Posted January 16, 2007 Ah just re-read you first post , MI bearings are NOT that part No . I would check them at the end of the season because if there is no excessive wear then the extra clearance between the crank and the bearing will give an extra thou of so of clearance to allow more oil in contact with the opposing surfaces and produce less friction . Share this post Link to post Share on other sites
Miles 331 1 Cars Posted January 17, 2007 Longmans sell a lead based big end bearing but only in a std size, but again I have always used the std bearing's and never really had too many problems, The main thing is to get the clearance right, What rod's are you using? Share this post Link to post Share on other sites
acox99 74 1 Cars Posted January 17, 2007 Longmans sell a lead based big end bearing but only in a std size, but again I have always used the std bearing's and never really had too many problems, The main thing is to get the clearance right, What rod's are you using? we've not decided what rods we're going to use yet, still trying to work out whats best without going too overboard. The standards are pretty good then? dont want to damage the crank if we're spending a lot of money on it as the aim is for the highest output we can get with money etc.... Share this post Link to post Share on other sites
rescue dude 0 Posted January 17, 2007 If it was me i'd change them every 250-300 miles. You should have no problems if you do this. Share this post Link to post Share on other sites
pug309twin40s 1 Posted January 17, 2007 If it was me i'd change them every 250-300 miles. You should have no problems if you do this. you missing an 0 of the end cause at that miles your be needing a bulk buy of bearings and car more of the road than on it changing them lol!! Share this post Link to post Share on other sites
James_R 3 Posted January 17, 2007 unless he means stage miles for hillclimbs and sprints, they cover harldy any distance and have to have regular rebuilds. Share this post Link to post Share on other sites
