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General Category => General Discussion => Topic started by: Arnie on May 26, 2011, 10:10:15 AM

Title: Engine vs Alternator RPM ?
Post by: Arnie on May 26, 2011, 10:10:15 AM
A former list member has asked me if I know the ratio of engine vs alternator rpm.
I don't, but maybe one of you does. 
He's looking for an engine speed related power take off for a high pressure mechanical fuel pump.
Any other ideas?

Cheers,
Arnie
Title: Re: Engine vs Alternator RPM ?
Post by: racerrad8 on May 26, 2011, 01:46:37 PM
Quote from: Arnie on May 26, 2011, 10:10:15 AM
A former list member has asked me if I know the ratio of engine vs alternator rpm.
I don't, but maybe one of you does. 
He's looking for an engine speed related power take off for a high pressure mechanical fuel pump.
Any other ideas?

Cheers,
Arnie


1:1

Both sprockets have 21 teeth.

Randy - RPM
Title: Re: Engine vs Alternator RPM ?
Post by: SkyFive on May 26, 2011, 02:25:13 PM

Ironically, I was thinking today about "what if" a FJ engine was built without the starter clutch/starter and alternator. It seems like it would eliminate considerable rotating mass...super fast revs.
Title: Re: Engine vs Alternator RPM ?
Post by: Pat Conlon on May 26, 2011, 05:21:41 PM
Quote from: SkyFive on May 26, 2011, 02:25:13 PM
Ironically, I was thinking today about "what if" a FJ engine was built without the starter clutch/starter and alternator. It seems like it would eliminate considerable rotating mass...super fast revs.

Yea Bryan, IIRC, Doc Hacker in the UK did this on his FJ track bike for just that reason: http://www.FJRacer.com (http://www.fjracer.com)
Title: Re: Engine vs Alternator RPM ?
Post by: Arnie on May 26, 2011, 09:25:33 PM
Thanks all, very much appreciated :good2:

Cheers,
Arnie