bcondrey
Joined: 03 Apr 2006
Posts: 580
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 Posted: Wed Nov 29, 2006 7:00 pm Post subject: B&C SD-20 and Oil Filter Adapter Final Verdict |
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I'm delinquent posting results of this combo, but better late than never I guess.
First, if you want to use the B&C 90 degree oil filter adapter with a Lycoming 540 engine on an RV-10, you also need their 1.4" spacer.
If you want to additionally use the B&C SD-20 alternator on the vacuum pad there is an interference issue with the inboard lower screw boss on the SD-20 and the upper inboard corner of the oil filter adapter. I strongly suspect that the interference issue would exist regardless of teh brand of 90 degree oil filter adapter. You have 2 solutions:
1) B&C has a 3/4" spacer kit that also contains replacement studs for the vacuum pad and a replacement shear coupling for the standard SD-20. Don't recall exact price of the spacer kit, but it's $75-100. I have this combo installed on my engine and can verify that it works. The 2.5" spacer on the oil filter adapter will absolutely NOT work with this combination.
2) There is another version of the SD-20 called an SD-20S which is shorter than the standard SD-20. They sell this with a "clocking adapter" that rotates the alternator 45 degrees and moves is aft about 3/4". This was their solution before the spacer above and is what Ed Hayden installed. I don't know the cost.
Of course, you could also install a remote oil filter which wouldn't have any interference issue but would cost more in addition to adding weight, complexity and more hose connections.
A word of caution - clearance is only about 1/8" (.125") between the forward edge of the SD-20 inboard lower screw boss and inboard upper mounting bolt on the oil filter adapter. B&C's oil filter adapter spacer is 1.4" and I see that most others are 1.5".
Attached picture shows the combo (#1 above) installed on my engine. If you look closely just to the right of the alternator and above the engine mount tube you can see the bolt head in front of the screw boss on the alternator. This is the problem area.
Last time I was on their web site B&C didn't have any of the above shown. Bill is the guy to talk to at B&C.
Bob
RV-10 #40105
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