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Date:         Sun, 23 Sep 2012 09:50:36 -0700
Reply-To:     Rocket J Squirrel <camping.elliott@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Rocket J Squirrel <camping.elliott@GMAIL.COM>
Subject:      Re: Alternator continuous-duty rating?-V-belt drive rating.
Comments: To: Dennis Haynes <d23haynes57@hotmail.com>
In-Reply-To:  <BAY152-ds8DEF47C479B6ADC11E20BA09F0@phx.gbl>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

"You should be able to use a wrench on the alternator pulley and turn the engine without the belt slipping."

Ah, then it's a bit loose.

"You can get a belt tension gauge."

Looks like a $100 item, not in my budget I guess.

"You can also upgrade the top bracket-bolt set with the 90+ setup which has a toothed drive to tighten the belt."

Who sells such things?

Also, Dennis wrote, "Some of the real early 1.9s had a 65 amp alternator and a single groove crank pulley. The alternator was upped for the at port AC installations and the three groove pulley for the even later power steering."

Um, this engine has a crank pulley with three separate grooves, each smaller than the one in front of it. Is that what is being described here?

-- Jack "Rocket j Squirrel" Elliott 1984 Westfalia, auto trans, Bend, Ore.

On 09/23/2012 09:24 AM, Dennis Haynes wrote: > You should be able to use a wrench on the alternator pulley and turn the > engine without the belt slipping. You can get a belt tension gauge. You can > also upgrade the top bracket-bolt set with the 90+ setup which has a toothed > drive to tighten the belt. Torque wrench 6 ft lbs. > > Dennis > > -----Original Message----- > From: Rocket J Squirrel [mailto:camping.elliott@gmail.com] > Sent: Sunday, September 23, 2012 12:15 PM > To: Dennis Haynes > Cc: vanagon@GERRY.VANAGON.COM > Subject: Re: Alternator continuous-duty rating?-V-belt drive rating. > > "This is why belt tension is so important [...]" > > Lame-o confession: I never know when my belt tension is right. The > push-to-check-deflection thing is so subjective to me that I just don't > trust my results. The engine squeals sometimes when I start it. Reckon it's > the belt. > > -- > Jack "Rocket j Squirrel" Elliott > 1984 Westfalia, auto trans, > Bend, Ore. > > On 09/23/2012 07:51 AM, Dennis Haynes wrote: >> The water boxer engine cannot reliably drive a larger alternator due >> to the drive belt set. Most belt drives are designed around the belt >> having a 180 degree wrap around the drive and driven pulleys. On the >> waterboxer the belt only skims around the drive pulley limiting the >> amount of friction available to drive the load. This is why belt >> tension is so important and from the factory a special high tensile > strength belt was used. >> >> Dennis >> >> -----Original Message----- >> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On >> Behalf Of David Beierl >> Sent: Saturday, September 22, 2012 11:13 PM >> To: vanagon@GERRY.VANAGON.COM >> Subject: Re: Alternator continuous-duty rating? >> >> At 07:41 PM 9/22/2012, Rocket J Squirrel wrote: >>> I don't think the 90-amp rating is a continuous rating. It's probably >>> peak rating, or one-hour rating or something, but not continuous. I'm >> >> Just some context - with 90 amps at 13.6 volts, assuming 85% >> efficiency the alternator will be sucking down about two horsepower >> from the belt and dissipating about 225 watts as heat. >> >> I don't know how much the water pump uses, but you're definitely >> pushing the edges of what most marine folks recommend driving with one >> automotive vee belt, especially the 3L size that we use. >> >> There's a little calculator at >> http://www.gizmology.net/pulleysbelts.htm for required tension and such. >> Only set up for two-sheave systems, but it's something. >> >> I took squint around www.gates.com for hp ratings and got nowhere useful. >> Stopped short of asking an engineer, which they provide for on the site. >> >> Yrs, >> d >


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