[Fot] Accusump & bearing coatings

[Tony Drews]

I coat both the main and rod bearings.  The coating is thin enough 
you don't need any additional allowance for it.  It makes a huge 
difference in visible wear during teardown even when running an accusump.

One other thing to mention regarding the accusump pre-lube at start: 
we're running high compression and high loads in the valve train - 
much higher than on a street car.  And, cranks, rods and cams are 
VERY expensive.  Anything we can do to prevent metal to metal  is 
worth installing.

- Tony

At 12:18 PM 9/15/2010, toodamnfunky at comcast.net wrote:
>I read on Tony's site that he uses Calico for bearing coatings applied at .25
>- .30 mil.
>
>( per Calico )
>
>In my upcoming build I plan to cryo treat and nitride the crank and coat the
>bearings.
>
>
>
>Does anyone know if an allowance needs to be made for the bearing coating when
>
>cutting a crank? and should the rod bearings be coated as well and again with
>the
>
>allowance for the coating on the rod bearings.
>
>
>
>Jim G
>
>
>
>
>----- Original Message -----
>From: "Tim Murphy" <timmurph at fastbytes.com>
>To: "Bill Babcock" <billb at bnj.com>
>Cc: "Randall" <TR3driver at ca.rr.com>, fot at autox.team.net
>Sent: Wednesday, September 15, 2010 10:53:23 AM
>Subject: Re: [Fot] Accusump
>
>One other thing, we're using the coated bearings which I know some other
>folks are using on the TRactor motors. B I would think that would also help
>prolong the life with a "cold" start. B I don't know which coating the
>machine shop sent them out for. B I think it was to the guy here in Wisconsin
>who I had heard more or less invented the bearing coating when he was
>working at Mirro Aluminum and doing work on coated pots and pans.
>
>Tim
>
>-----Original Message-----
>From: Bill Babcock [mailto:billb at bnj.com]
>Sent: Wednesday, September 15, 2010 10:54 AM
>To: Tim Murphy
>Cc: 'Randall'; fot at autox.team.net
>Subject: Re: [Fot] Accusump
>
>Probably only worthwhile if you pull the plugs first, otherwise you're
>probably shortening the life of an already overworked starter. Of course if
>you do that make sure you disconnect the power lead to the coil, or you're
>sending sparks everywhere and shortening the life of an overworked coil,
>distributor, and plug wires. Then reconnect everything quickly and fire it
>up. Or flip on the ignition switch with an accusump connected and wait for
>your oil pressure to peak at 20 pounds and start it while the system is
>fully pressurized.
>
>Hmm, I wonder which is better.
>
>On Sep 15, 2010, at 8:17 AM, Tim Murphy wrote:
>
> > Is there any advantage to cranking the engine without ignition until the
>oil
> > pressure comes up and then flipping the ignition on to fire it? B If would
> > seem the loads on the bearings with just cranking it over would be quite a
> > bit less, and less damaging, than actually firing the engine immediately.
> >
> > Tim
>_______________________________________________
>fot at autox.team.net
>
>http://www.fot-racing.com
>
>Donate: http://www.team.net/donate.html
>Archive: http://www.team.net/archive
>Forums: http://www.team.net/forums
>Unsubscribe:
>http://autox.team.net/mailman/options/fot/toodamnfunky@comcast.net
>_______________________________________________
>fot at autox.team.net
>
>http://www.fot-racing.com
>
>Donate: http://www.team.net/donate.html
>Archive: http://www.team.net/archive
>Forums: http://www.team.net/forums
>Unsubscribe: http://autox.team.net/mailman/options/fot/tony@tonydrews.com