[QUOTE=BearKiller;2510558]Mr. JIM LANE,

Please, what is the outside diameter of the pulley on your Leece-Neville ??


The stock Dodge pulley is 2.3", give or take.

Many thanks.[/QUOTE


BK

The outside diameter of the pulley is 2 9/16 I will have to remove the belt t get the dimensions where the belt rides.

I am not sure what the pulley ratio is but the smaller the pulley the higher your output will be at an idle.

The acceptable Pulley Ratio Range 2:1 to 3:1

Jim

 

THANK YOU again, sir.

No need to remove the belt and measure; I can work with that.

Which leads me to my next question :

When O.D.s of these pulleys are given, are they meaning the total outside measurement, or the measurement of the belt-riding surface ??



To come up with the pulley ratio, I will need to determine the crank-pulley diameter and do some math, right ??


The size of all the other pulleys should have no bearing on the ratio between the crank-shaft pulley and alternator pulley, as however much ground the belt covers at the crank, it is covering an equal amount at the alternator, right ??

THANKS

 

I've tried and have not got it to work. Maybe someone with more time and knowledge may be able to figure it out, i'm just going to remove the bulb.

 

Well, I have my 555 Alternator and another Group 31 battery, thank you Mr. Lane for all your input, a true asset!
Now as soon as I am finished fixing holes in Metal parts, (head gasket) I can install them!

 

I now have two, a 140-amp and a 160-amp; and, I am almost owner of another 160-amp.


I sort of feel like I have "arrived"; for years, I have heard mention of Leece-Neville alternators, in posh and reverent tones, whenever the ultimate in alternators was mentioned; no one ever seemed to have actually seen one, but we did believe that they might really exist.

 

You are getting waaaaay too much into this BK!

 

The OD of the pulley is the surface where the belt will ride.
Jim

 

Hoarding Leece Neville alternators is a form of OCD

 

I believe that the 91.5+ intercooled trucks have a larger crank pulley than 91.5- non intercooled trucks, and I believe it is around 8" diameter.

 

Well, now that I have been diagnosed and we know what is wrong with me, is it treatable by therapy and a support group, or am I terminal ??




Thanks for the measurements.

 

[QUOTE=BearKiller;2512304]Well, now that I have been diagnosed and we know what is wrong with me, is it treatable by therapy and a support group, or am I terminal ??




We can go to therapy together, I have a bunch of the 100 amp ones they used in the 80's, I just cannot pass them up at the crusher, and I have never had one fail. HELP!

 

Mister Jim Lane,

How far apart, center-to-center, is the new bolt-hole from the old one ??

Also, does the L-N "ear" end up flush with the stock alternator position, or is it located the thickness of the stock bracket forward ??

I can't tell for certain in the picture.

Thanks.

 

How is this?



The spacer is 2" the Leece Neville has a ISO J-180 Mount which is just under 4” or 3.935to be exact.

 

Originally Posted by BearKiller
THANK YOU again, sir.

No need to remove the belt and measure; I can work with that.

Which leads me to my next question :

When O.D.s of these pulleys are given, are they meaning the total outside measurement, or the measurement of the belt-riding surface ??



To come up with the pulley ratio, I will need to determine the crank-pulley diameter and do some math, right ??

The Crank pulley is 6 1/6" in diameter.

The size of all the other pulleys should have no bearing on the ratio between the crank-shaft pulley and alternator pulley, as however much ground the belt covers at the crank, it is covering an equal amount at the alternator, right ??

Correct, the Crank and the Alternator pulley are all that you need to find the ratio.


THANKS

Oops this should read:

The Crank pulley is 6 1/2" in diameter.


Ok can somebody good at math check and see if I was paying attention back in High School?

Crank~~Alt ~~~~Ratio~~~~~RPM~~~Alt.RPM
6.50" / 2.70"= 2.407407407:1 x 800= 1925.925925

I found this ratio chart and it looks like I was pretty close.

http://www.penntexusa.com/Pulley_Ratio_Chart.htm

So at a fast idle the alternator will put out 100-amps.

Jim

 

So for a IC truck:

Crank~~Alt ~~~~Ratio~~~~~RPM~~~Alt.RPM
8" / 2.70"= 2.9629629629:1 x 800= 2370.37

Still OK or too fast?