Forum: Model A (1928-31)
07-07-2020, 08:28 AM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
Synchro909,
I have used AER bearing shells for the past 12 years in over 180 engines. Since I started using them I can only recall 4 engines that had the experience of the bearing material breaking...
|
|
Forum: Model A (1928-31)
07-05-2020, 11:38 AM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
Synchro, Is it possible that the timing was a bit too far advanced for the load at times? It only takes a short run with too much advance to damage a bearing. Would you be able to share some photos...
|
|
Forum: Model A (1928-31)
07-04-2020, 08:43 PM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
Synchro,
I made a series of tests on an engine I was building for myself on my dyno some years back related to the required oil clearance for the insert bearings I use. I found I needed to increase...
|
|
Forum: Model A (1928-31)
02-06-2017, 11:10 PM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
Ron Kelly would likely do this type of work. In the past, he machined original "A" rods for inserts. "B" is the same work...just different sizing.
|
|
Forum: Model A (1928-31)
02-06-2017, 04:57 PM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
See post #46: These inserts, designed specifically for the Model A, are supplied by Antique Engine Rebuilding (AER), Skokie, IL. They have worked very well for me.
If you look close, you will...
|
|
Forum: Model A (1928-31)
02-06-2017, 09:12 AM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
Here are some photos of the fixture I built to hone the aluminum lined insert bearing shells.
The fixture is bored .00015" below the maximum block housing bore specified by the bearing...
|
|
Forum: Model A (1928-31)
02-03-2017, 09:10 AM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
George, I tried the same thing by extending the oil "wells" along the seams of the two insert halves. I extended the well (both sides) to within .25" of the back end of the bearing. I put the engine...
|
|
Forum: Model A (1928-31)
02-01-2017, 05:52 PM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
Quote from Synchro909
"Back to the OP, I've run inserts for tens of thousands of hard miles towing a camper) without trouble. As for inserts only being available in 0.010" increments, I agree, that...
|
|
Forum: Model A (1928-31)
02-01-2017, 05:28 PM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
Well I used to fish with my brothers quite a bit but it seemed that whenever I joined them the fish didn't bite...so I do not get invited much anymore.
But for the tale of 78 mph in a '29...
|
|
Forum: Model A (1928-31)
02-01-2017, 12:47 PM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
Tony, Great stories...thanks for sharing. I have one more for you...on my Phaeton run of a tank full at 78 mph, I noticed the ride/car got real smooth and the steering very easy at 75 mph. It was...
|
|
Forum: Model A (1928-31)
02-01-2017, 12:25 PM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
96 mph! That's impressive and a bit crazy. Crazy like me...I once held mine at 78 mph for a full tank of gas on a Michigan freeway; that was the speed the left lane was rolling. Other than a full...
|
|
Forum: Model A (1928-31)
02-01-2017, 11:53 AM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
All the factors you mention could contribute to a failure.
The main point I was trying to make is that the clearances for insert bearings are a narrow range and very much less forgiving than Babbitt...
|
|
Forum: Model A (1928-31)
01-31-2017, 04:02 PM
|
|
Replies: 78
Views: 26,045
Re: Insert bearings
Yes, it has happened to me. The correction to this is that additional oil clearance needs to be achieved.
You say the bearing spun and cut the oil flow...I disagree. The bearing to shaft...
|
