Topic: Alternator Up Grade 32amps

[anders288]

  Hi
 This is the reg. that will come with the up grade it will handle this app no problem.
It will also have new plugs at the reg. a PAL 50 amp in line fuse. The three wires
from the stator connect to the reg then a Pos and neg. wire connect to the battery.

 

[scottly]

The stock alternator provides enough power for me, but I'm interested in the weight loss from the PM rotor. I wonder what the output would be with a stock 750 stator?

[anders288]

The stock alternator provides enough power for me, but I'm interested in the weight loss from the PM rotor. I wonder what the output would be with a stock 750 stator?

 
     Scottly this flywheel uses an internal stator are CB's use an external stator.

[scottly]

More pictures, please.

[754]

 I willtry to get a pic of a cutdown cover, but it has no cover welded on yet.
 Guys I think he is using the stock cover not cut down as it is very simple to index the centre element to the outer one, once you shorten up the cover it is a bit of extra work to accurately center the center part.

[grasscutter]

Flywheel weight reduction by 1/2, will effect your idle.  For racers, lightened flywheels are great!  Not so much for the street.

[Retro Rocket]

Flywheel weight reduction by 1/2, will effect your idle.  For racers, lightened flywheels are great!  Not so much for the street.

I wouldn't worry about that at all, there are plenty of guys here that have lightened rotors, some by half, and not one has ever mentioned idle problems, not to mention just about every modern sports bike...

[anders288]

Flywheel weight reduction by 1/2, will effect your idle.  For racers, lightened flywheels are great!  Not so much for the street.

   
     Back in 1973 I drag raced my K1 with the flywheel removed and there was no differance at idle. The crank shaft has enough weight to make up for a lighter flywheel. 

[MRieck]

I willtry to get a pic of a cutdown cover, but it has no cover welded on yet.
Guys I think he is using the stock cover not cut down as it is very simple to index the centre element to the outer one, once you shorten up the cover it is a bit of extra work to accurately center the center part.

That was my understanding too.

[Leino]

Flywheel weight reduction by 1/2, will effect your idle.  For racers, lightened flywheels are great!  Not so much for the street.

   
     Back in 1973 I drag raced my K1 with the flywheel removed and there was no differance at idle. The crank shaft has enough weight to make up for a lighter flywheel.

Same thing with my GS, no problems what so ever.

[anders288]

I willtry to get a pic of a cutdown cover, but it has no cover welded on yet.
Guys I think he is using the stock cover not cut down as it is very simple to index the centre element to the outer one, once you shorten up the cover it is a bit of extra work to accurately center the center part.

That was my understanding too.

  This has been designed to use with stock cover. I don't have any plans to mod or make a new cover at this time. 

[anders288]

  I started this design because I wanted to use my heated gear and heated grips on my K7. This a photo of the 45amp setup I'm going to run on the K7


 This setup is known to overheat it's reg and the cure is to use this one to replace it.
 

[grasscutter]

Flywheel weight reduction by 1/2, will effect your idle.  For racers, lightened flywheels are great!  Not so much for the street.

   
     Back in 1973 I drag raced my K1 with the flywheel removed and there was no differance at idle. The crank shaft has enough weight to make up for a lighter flywheel.

Same thing with my GS, no problems what so ever.

Hmmm.  Interesting.

I drag raced air cooled VW's for many years.  Lightened flywheels had a significant difference on a street driven race car.  VW crankshafts are much heavier than a Honda crank.   Surprised to hear it makes no difference on bike, but did in a car.

[754]

BIt makes a difference, but its not an (I wannna change it back ) difference.... Plus its really handy when you are putting around at 2 or   3 k in  2nd gear, and wick it up and slip clutch...rather than downshift..

Leave it with us to come up with a slimmer cover, I sure we could make a plate that holds the outer element, and mill down the dyno cover, then fit them together and weld it up..

[MCRider]

Flywheel weight reduction by 1/2, will effect your idle.  For racers, lightened flywheels are great!  Not so much for the street.

   
     Back in 1973 I drag raced my K1 with the flywheel removed and there was no differance at idle. The crank shaft has enough weight to make up for a lighter flywheel.

Same thing with my GS, no problems what so ever.

Hmmm.  Interesting.

I drag raced air cooled VW's for many years.  Lightened flywheels had a significant difference on a street driven race car.  VW crankshafts are much heavier than a Honda crank.   Surprised to hear it makes no difference on bike, but did in a car.

At least on the CB750, its a liveable difference. I had many tens of thousands of miles on one with a lightened crank and rotor. I'm sure it has to do with idle speed, power pulses and stuff like that.

[Ricky_Racer]

Anders, you're a fine craftsman and a fine technician. Maybe these will help inspire you or someone else... RR

[750essess]

Subscribed. Made up a setup like this myself a while back using vfr800 parts. Interested in seeing price. Looks like a very well thought out setup. Mine puts out 14.5 volts at idle. Made things work so much better on the efi conversion. I exchanged a few messages with a guy back then that was interested in making some kits up but never heard any more about it.

[anders288]

Anders, you're a fine craftsman and a fine technician. Maybe these will help inspire you or someone else... RR

  The stator mount could be built into the new end cover. I also think the alt on the CB750 is part of it's looks.
I can also see the advantage of a shorter cover and might start designing one. After I get this upgrade nailed down.

[GroovieGhoulie]

I drag raced air cooled VW's for many years.  Lightened flywheels had a significant difference on a street driven race car.  VW crankshafts are much heavier than a Honda crank.   Surprised to hear it makes no difference on bike, but did in a car.

Not sure if VW cranks are counterweighted.  I'm pretty sure the CB's cranks have huge counterweights.

I ride a 550, and am wondering if this new alternator, (with the addition of some relays), would allow a higher-power headlamp.  I would LOVE a 100w flamethrower of a headlamp.  Right now, it's like a little guy has a Bic cigarette lighter in my headlamp bucket.  Really want to fix that.

[MCRider]

I drag raced air cooled VW's for many years.  Lightened flywheels had a significant difference on a street driven race car.  VW crankshafts are much heavier than a Honda crank.   Surprised to hear it makes no difference on bike, but did in a car.

Not sure if VW cranks are counterweighted.  I'm pretty sure the CB's cranks have huge counterweights.

I ride a 550, and am wondering if this new alternator, (with the addition of some relays), would allow a higher-power headlamp.  I would LOVE a 100w flamethrower of a headlamp.  Right now, it's like a little guy has a Bic cigarette lighter in my headlamp bucket.  Really want to fix that.

After cleaning all your connections, etc. the adition of relays now will brighten the light a lot without any changes to the alt, bulb  etc. Give it a try, speaking from first hand experience.
As to the alt, the CB750 set up is much different than the 500/550, and would need appropriate engineering, but i defer to the experts.

[23tbucket]

Interesting thread. Making a narrower cover shouldn't be a biggy. I removed the stock alternator..modified the stock cover...put in a seal....made an external pulley....ran a belt up to drive an external alternator. I would have used Anders idea had it been available. I needed the extra charging fo EFI.



All I did for the cover was to mill off what I needed, fitted an aluminum plate, found the center, bored out for the seal, and JBWelded the outer cover to the stock. It could have been tigged, but there is no pressure in there anyway. A different cover for Anders alternator wouldn't need to be bored out for a seal of course and the finnigans are extra!!!

[anders288]

I drag raced air cooled VW's for many years.  Lightened flywheels had a significant difference on a street driven race car.  VW crankshafts are much heavier than a Honda crank.   Surprised to hear it makes no difference on bike, but did in a car.

Not sure if VW cranks are counterweighted.  I'm pretty sure the CB's cranks have huge counterweights.

I ride a 550, and am wondering if this new alternator, (with the addition of some relays), would allow a higher-power headlamp.  I would LOVE a 100w flamethrower of a headlamp.  Right now, it's like a little guy has a Bic cigarette lighter in my headlamp bucket.  Really want to fix that.

     Yes it would be able to keep up with 100w headlight no problem and still have plenty left in reserve.

[anders288]

Interesting thread. Making a narrower cover shouldn't be a biggy. I removed the stock alternator..modified the stock cover...put in a seal....made an external pulley....ran a belt up to drive an external alternator. I would have used Anders idea had it been available. I needed the extra charging fo EFI.



All I did for the cover was to mill off what I needed, fitted an aluminum plate, found the center, bored out for the seal, and JBWelded the outer cover to the stock. It could have been tigged, but there is no pressure in there anyway. A different cover for Anders alternator wouldn't need to be bored out for a seal of course and the finnigans are extra!!!

             I have the ability to design and make a shorter cover. But before I do that I want to get this one nailed down.

            I still have to design a kit for the 550's and 350's. In the mean time I will start thinking about the case mod.

[scottly]

I drag raced air cooled VW's for many years.  Lightened flywheels had a significant difference on a street driven race car.  VW crankshafts are much heavier than a Honda crank.   Surprised to hear it makes no difference on bike, but did in a car.

Not sure if VW cranks are counterweighted.  I'm pretty sure the CB's cranks have huge counterweights.

The stock VW cranks were Not fully counter-weighted. They were statically balanced, but with out counter-weights would flex above 5K RPM, wiping out the main bearings, and/or the case and crank. From memory the 750 crank was as heavy, if not heavier than a stock VW crank. The VW flywheel, on the other hand, was MUCH heavier than a 750 rotor, with much of the mass located in a diameter 2-3 times larger. 

[Kickstart]

Anders, you're a fine craftsman and a fine technician. Maybe these will help inspire you or someone else... RR

  The stator mount could be built into the new end cover. I also think the alt on the CB750 is part of it's looks.
I can also see the advantage of a shorter cover and might start designing one. After I get this upgrade nailed down.

I was thinking you were going with a modified cover... I'm glad to hear you're trying to do this using the stock cover.

Subscribed... definitely interested in one of these if you decide to offer them for sale.