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B&C alternator clearance

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brooksrv6(at)hotmail.com
Guest

Posted: Tue Jan 24, 2006 2:14 pm Post subject: B&C alternator clearance

I currently have Vans 35amp alt. With a Gates 7355 belt (36-1/4") on an 

O-360 C/S. Somewhere between 3-3.5 g's the pulley makes contact with lower 

cowl.

I tried the next size shorter belt 7350 (35-5/8") but it's too tight and 

holds the alternator against the Stainless oil line from the governor. I 

would buy a B&C L40 if I thought it would give more clearance, but would 

rather save the money if it wouldn't fit with the shorter belt.

Does anyone have a B&C L40 on a O-360 with a constant speed prop, and using 

a 7350 (35-5/8") (890mm) belt? If I know this combination works I'll order 

the B&C.



Chris Brooks

RV6

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klwerner(at)comcast.net
Guest

Posted: Tue Jan 24, 2006 5:28 pm Post subject: B&C alternator clearance

Chris,

I don't have an answer for you on the L40, but here is something else you may consider. Get yourself a "slightly" bigger diameter pulley for your current alternator, which will do two things for you: 1. Get the ALT closer to the engine while still using the 7355 belt you have on it right now, and 2. slow down your ALT.-RPM a little bit!  Does that make sense to anyone else ???



Good Luck to you (without spending to much money)

  ---

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Vanremog(at)aol.com
Guest

Posted: Tue Jan 24, 2006 8:14 pm Post subject: B&C alternator clearance

In a message dated 1/24/2006 2:16:26 P.M. Pacific Standard Time,  

brooksrv6(at)hotmail.com writes:



Does  anyone have a B&C L40 on a O-360 with a constant speed prop, and using  

a 7350 (35-5/8") (890mm) belt? If I know this combination works I'll order  

the B&C.

======================================

 

I run the B&C L60 alternator with the Gates 7360 belt fine on mine  since day 

one, if it helps you to decide.  



GV (RV-6A  N1GV O-360-A1A, C/S, Flying 771hrs, Silicon Valley, CA)

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brooksrv6(at)hotmail.com
Guest

Posted: Wed Jan 25, 2006 6:53 am Post subject: B&C alternator clearance

Konrad, that makes since to me. My algebra is probably flawed but I 

calculated that if I went with a 3-1/4" pulley instead of the 2-3/4" it 

would move the alt. .4" closer to the engine but only gain 1/8" of pulley 

clearance. That .4" puts me back into the prop governor line.



Chris

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klwerner(at)comcast.net
Guest

Posted: Wed Jan 25, 2006 7:44 am Post subject: B&C alternator clearance

Chris,

What is your thought in regards to a small clearance bump fiberglassed into the cowl, versus buying a new expensive alternator?

After all it is not very much additional clearance that you are looking for?  Or perhaps you could stay away from the 3+G Pulls  

  ---

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deanpichon(at)msn.com
Guest

Posted: Wed Jan 25, 2006 9:55 am Post subject: B&C alternator clearance

I have a similar set-up to yours with the 40 amp B&C alternator, the same 

engine, and a constant speed prop.  I found that my alterantor hit the cowl 

on the first flight.  I used a slightly shorter (Gates) belt and modified 

the tensioning arm.  Since the mod I have not had a problem in over 300 

hours.  'Hope this helps,



Dean Pichon

RV-4

Bolton, MA



----Original Message Follows----

From: "Chris Brooks" <brooksrv6(at)hotmail.com>

Reply-To: rv-list(at)matronics.com

To: rv-list(at)matronics.com

Subject: B&C alternator clearance

Date: Tue, 24 Jan 2006 16:13:28 -0600






I currently have Vans 35amp alt. With a Gates 7355 belt (36-1/4") on an

O-360 C/S. Somewhere between 3-3.5 g's the pulley makes contact with lower

cowl.

I tried the next size shorter belt 7350 (35-5/8") but it's too tight and

holds the alternator against the Stainless oil line from the governor. I

would buy a B&C L40 if I thought it would give more clearance, but would

rather save the money if it wouldn't fit with the shorter belt.

Does anyone have a B&C L40 on a O-360 with a constant speed prop, and using

a 7350 (35-5/8") (890mm) belt? If I know this combination works I'll order

the B&C.



Chris Brooks

RV6

On the road to retirement? Check out MSN Life Events for advice on how to 

get there! http://lifeevents.msn.com/category.aspx?cid=Retirement

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bhester(at)hopkinsville.n
Guest

Posted: Wed Jan 25, 2006 5:37 pm Post subject: B&C alternator clearance

Chris, go here and see if this helps, he's using a NAPA 7355 belt:

http://our-rv7a.com/engine/engine110703.htm



Surfing the Web from Hopkinsville, KY

Visit my web site at: http://www.geocities.com/hester-hoptown/RVSite/

RV7A Slowbuild wings-QB Fuse-XPO360 engine 



Chris Brooks wrote:



 	  Quote: 	
		  



Konrad, that makes since to me. My algebra is probably flawed but I 

calculated that if I went with a 3-1/4" pulley instead of the 2-3/4" it 

would move the alt. .4" closer to the engine but only gain 1/8" of pulley 

clearance. That .4" puts me back into the prop governor line.



Chris

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kboatright1(at)comcast.ne
Guest

Posted: Wed Jan 25, 2006 5:50 pm Post subject: B&C alternator clearance

If you have a belt length problem, take your current belt to the local auto 

parts store. They will have a gauge to measure the length of your belt. Once 

you know that, you can choose another one that is the appropriate amount 

shorter.



I found a little pulley scrubbing on my -'6's cowl last summer, took the old 

belt in and got a replacement that was a centimeter or two shorter. Made all 

the difference in the world.



KB

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martin(at)gbonline.com
Guest

Posted: Thu Jan 26, 2006 6:57 pm Post subject: B&C alternator clearance

Chris,

I have the B&C alternator and have over 1200 hours with it.  It works 

perfect, no problem with clearance.

Dick Martin

RV8 N233M

the fast one

---

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