Here's a link to an interesting site showing a patented variable valve timing system which works by providing variable LIFT, achieved by moving the OHC "rocker...
Maybe this has gone around on this group already, but if not, all gearheads need to know about this and start seeing applications for it, quite neat. Take your...
I've always had a concern regards lube in cool/cold weather to our connecting rod big end needle bearings on start up with our modified BSA Gold Stars. This...
David Kath
BSAGS@...
Mar 1, 2004 9:32 am
6320
Gas moving the weapon action and moto mechanics are not the best examples. From what I have seen published from NASA, it takes quite a bit of H2 and 02 in a...
Afaik too thick oil will expand your cases and cause the bearings to sit with too much clearance. And thats why racers tend to use the extra clearance C3...
... You can get some feel for this by observing how the various bits of the frame vibrate. Low BF shakes bits in line with the bore centreline - high BF at...
Ian
iwd@...
Mar 1, 2004 10:14 pm
6323
C3 bearing clearances are used because the heat generated by a running engine closes the clearances on the bearings. It will happen when using either thick or...
Why isn't the big end journal of a connecting rod made the same size as the small end? I can't see each end not undergoing the same forces, and with the...
... Yes, I can certainly see that, in fact I decided (while trying to get to sleep last night) that I would compare the ESO bottom end oil flow rate with that...
... Gold Stars. ........... ... Dave, Consider that speedway engines on meths running on cold nights at frozen speedway events get little warming up and are...
The clearance in ball bearings is to allow for case versus shaft and bearing growth with changes in temperature and to allow for misalignment due to flex as is...
To: "mc-engine" <mc-engine@yahoogroups.com> From: "Josh Fowler" <jo605454@...> Add to Address Book Date: Mon, 01 Mar 2004 20:30:54 -0500 Subject: rod...
... Sounds not very good from here. Oil viscosity doesn't affect bearing size or clearance, it's simply not 'strong' enough no matter the weight. As for C3...
bjammin@...
Mar 2, 2004 4:21 am
6331
Dave, look at it as your chance to build one of those big hot-air blowers like NSU used to warm up their GP bikes. cheers, Michael...
I vaguely remember everyone (not me!) who was doing the annual New Years Day (brrr!) ride in the really deep snow up Pikes Peak in Colorado back during The...
David Kath
BSAGS@...
Mar 2, 2004 5:20 am
6333
I'd almost marry that site but I doubt I could be a one site man..... I hope that site will understand that I still love it just the same. Put in a good word...
... Yer gonna get lots of answers, but basically it's because a crank with wrist-pin sized journals would fly apart. Regards, Hoyt McKagen Belfab CNC -...
bjammin@...
Mar 2, 2004 2:03 pm
6335
... Quite true. ... If you're saying they chose the bearings w/o sufficient thought, I would agree. ... Given frosty mornings at 25F and normal operating temps...
bjammin@...
Mar 2, 2004 2:03 pm
6336
The left and right main bearing on a Vincent are the same, both rollers. The left, primary side, also has a ball bearing outside of the roller. Crankcase ...
What's the minimum allowable sleeve thickness for a 4 stroke inline four? At what point do I have to rebore the water jackets and re- sleeve? Thanks in...
... I try to always hold 3 mm thickness for up to say 65 mm bore and it never hurts to have more for larger ones. Regards, Hoyt McKagen Belfab CNC -...
bjammin@...
Mar 2, 2004 8:00 pm
6339
I believe we can all agree about 4-in-line engine (4 val per cyl) camshaft assembly taking some 2-5 HP depending on the rpm, say, 5 being on 5000 rpm... people...
Maybe its something to do with the fact that the forces on the big end are of the order of 10 tons/sq inch (depending on the engine, of course). You need a big...
RohanB
rohan3333@...
Mar 2, 2004 10:15 pm
6342
... Same answer. If anything, an overhung pin needs even more stiffness. Regards, Hoyt McKagen Belfab CNC - http://batwings.freeyellow.com/belfab.html Best MC...
bjammin@...
Mar 2, 2004 11:22 pm
6343
... precision; IOW ... not the ... From NTN website FAQ. http://www.ntnamerica.com/Knowledge/Product_FAQs.htm "Does internal clearance effect the bearing...
... Do you mean the bearing OD fit is not adjusted after the internal clearance is known? That sounds OK. ... I think its pretty well established that tighter...
Well. if you take a standard ball bearing, and just squeeze it in your hand, you can FEEL the added resistance when turning the bearing.... Yes, you do want a...
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