-MD- Pulleys, Discusion, Cranks and Alternators-Long Read- - Page 8 - Performance Forum

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Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Wednesday, October 26, 2011 3:44 AM
We will see after I finish up my current Group Purchase on Fuel rail adapters.




PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Wednesday, October 26, 2011 10:25 AM
LN2 crank I already have the alt, and I love it. acquired it through trade, lol.


I need a new sig.
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Monday, January 09, 2012 5:01 AM
I'm working on a LN2 crank pulley, L61 trigger wheel crank pulley, and a LG0 "HO" sized crank pulley. The local machine shops are REALLY busy, so I might try for one BIG Group Purchase for all three at once.....thoughts? Looking for sometime in February.







PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Monday, January 09, 2012 5:09 AM
Can you also do a alt pulley buy at the same time as well?

And ill be buying the trigger wheel as well.
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Monday, January 09, 2012 6:18 PM
id be down for trigger wheel crank pulley and alt pulley






Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Sunday, January 15, 2012 8:23 PM
I have 2 of the LD9 crank pulleys, both old and new. I need a matching alternator pulley.....


"Oil Leak ? What oil Leak ? Oh, Thats Just The Sweat From All The HorsePower!!"

Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Sunday, January 15, 2012 9:15 PM
Love my "old" blue LD9 & alt. pulley!!

MD=>FTW


Jason



USACi =>146.9db
14.88 @ 90.73MPH =>GM Charger, Motor Mounts, Catback exhaust
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Monday, January 16, 2012 3:51 AM
Thanks for the love guys!




PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Saturday, January 28, 2012 8:28 PM
bump, LN2 love

one LN2 crank pully for me please. loving my Alt pully.


I need a new sig.
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Thursday, April 26, 2012 6:19 AM
-MD- Enforcer wrote:

I'm working on a LN2 crank pulley, L61 trigger wheel crank pulley, and a LG0 "HO" sized crank pulley. The local machine shops are REALLY busy, so I might try for one BIG Group Purchase for all three at once.....thoughts? Looking for sometime in February.
Better late than never. Hope to get my final quote back next week...FINALLY!!!!!!!!!!!

LG0 Sized crank, and a VERY small alternator pulley set will be the first GP up. Pics soon I hope!






PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Thursday, April 26, 2012 6:19 AM
This needs to be here!
-MD- Enforcer wrote:

Stock LD9 Crank Pulley bolt torque is 129 ft/lbs plus 90 degrees.


This is my recommendation. Which is very similar to RKSport, RSM, Unorthadox Racing, Apex Racing, and Custom Car Grillz pulleys procedures. I believe they all copied Unorthadox racing's procedure.

Aluminum Pulley Manufactures, Revised by Michael Davis wrote:


Installation Procedure for New Aluminum Crank Pulley
Refer to a Hayes, Cilton, or Factory Service Manual for proper & safe removal procedures.

1. Inspect Front crankshaft pulley seal for signs or wear. Replace if seal if hard or brittle. Please refer to a service manual for proper install procedures.

2. Lubricate the front seal and the sealing surface of the pulley with chassis Grease GM P/N 1051344 or equivalent.

3. Install the pulley onto the crankshaft indexing keyway. Tap into place using a rubber or sand filled mallet.

4. Hand tighten the remaining bolt and the washer.

5. Tighten the bolt to 80 ft-lbs. / 108.1 NM while using J 38122, Crankshaft Pulley Holder, to prevent crankshaft rotation. Put a mark on the socket next to one of the four marks on J 38122. This mark will represent the 0 degree mark.

Then further tighten the bolt by rotating the 27mm socket in a clockwise rotation 90 additional degrees. At 90 degrees the socket will index with the next mark on the J 38122 tool.

Recheck bolt torque after driving 5-10 miles. If bolt is loose re-torque, and recheck after driving 5-10 miles. Then ensure the bolt is still tight after driving an additional 25 miles.

This sequence should not need to be done more than once. If the bolt loosens after driving the last 25 miles, purchase a new bolt GM P/N 22531863 and washer GM P/N 22538202, and inspect all mating surfaces for burs or foreign debris. If new bolt and washer are purchased, start over at step one.


Enjoy!



PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Saturday, April 28, 2012 6:37 PM
In for L61 Crankshaft & Alternator..... please!!!



J-Body Club of Ontario (JCO)
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Monday, April 30, 2012 5:10 PM
Put me on the list for an alternator pulley. Maybe we can do a trade. I havent forgotten about you. Well I did, but remembered again. lol.


"Oil Leak ? What oil Leak ? Oh, Thats Just The Sweat From All The HorsePower!!"

Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Tuesday, May 01, 2012 3:42 AM
DSMskyline wrote:

Put me on the list for an alternator pulley. Maybe we can do a trade. I haven't forgotten about you. Well I did, but remembered again. lol.

LOL



PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Tuesday, May 01, 2012 6:54 AM
Who wants to guess what this is a model of? 5.5" OD, Actually 5.180" to the grooves.





Edited 1 time(s). Last edited Tuesday, May 01, 2012 6:54 AM
Attachments
LD9-5180 REVA SW.jpg (124k)


PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Tuesday, May 01, 2012 7:31 AM
So this pulley is much stronger than my normal LD9 crank pulley. Since it is so much smaller. WAY less stress on it. Keyway is still the first thing to fail at 1000 times normal stresses. I'm kind of really proud about this one.


Also should be just under 18 Ounces...according to SolidWorks.




Edited 2 time(s). Last edited Tuesday, May 01, 2012 7:38 AM
Attachments
LD9-5180 REVA SWcos.jpg (142k)


PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Tuesday, May 01, 2012 10:50 AM
hells yea! lightest underdrive pulley evar made!



Come join us over on the Olds Quad 4 and Twin Cam Facebook group!
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Tuesday, May 01, 2012 11:36 AM
-Z Yaaaa- wrote:

hells yea! lightest underdrive pulley evar made!


I believe the one ebay pulley I use to have was like 14 ounces.

Regardless Md does great work. Finally got a Alternator pulley of his. just need to install it now.



FU Tuning



Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Thursday, May 03, 2012 7:35 AM
Ok so I wanted to post a little more info.....Since i have been getting a lot of questions about this with my group purchase coming up on the LG0 sized crank and over driven alternator pulley for the LD9. "The alternator pulley will fit all 95-05 j-bodies."


A stock crank pulley working diameter is 6.406".
A stock alternator pulley working diameter is 2.208".

My over driven ld9 crank pulley working diameter is 7.000"
My LG0 crank pulley working diameter is 5.180"
My over driven alternator pulley working diameter is 1.818"


Some easy calculation time.

So lets say red line is 6,500 RPM, stock crank and alternator pulley.
With a stock crank pulley rotating at 6,500 rpm, the alternator pulley would be rotating at 18,858 RPM.
Example. 6500 rpm x 6.406" = 41639 / 2.208" = 18,858.243 RPM.

So lets say red line is 6,500 RPM, LG0 sized crank and my over driven alternator pulley.
With a LG0 crank pulley rotating at 6,500 rpm, the alternator pulley would be rotating at 18,520 RPM.
Example. 6500 rpm x 5.180" = 33670 / 1.818" = 18,520.352 RPM.

So lets say red line is 6,500 RPM, over driven crank and my over driven alternator pulley.
With a over driven crank pulley rotating at 6,500 rpm, the alternator pulley would be rotating at 25,027 RPM.
Example. 6500 rpm x 7.000" = 45500 / 1.818" = 25,027.503 RPM.

So lets say red line is 6,500 RPM, LG0 crank and stock diameter alternator pulley.
With a LG0 crank pulley rotating at 6,500 rpm, the alternator pulley would be rotating at 15,249 RPM.
Example. 6500 rpm x 5.180" = 33670 / 2.208" = 15,249.094 RPM.

Please someone check my numbers.


The Supercharger formula that was posted....which is the same thing as mine, but organized different.
Top from boost forum & Bottom is my formula.
Crank Pulley diameter 6.406" / Supercharger pulley size 2.7" = 2.373 X engine Red line 6,500 = 15421.852 RPM
Red line 6500 x crank pulley diameter 6.406" = 41639 / super charger pulley size 2.7" = 15421.852 RPM



Edited 1 time(s). Last edited Thursday, May 03, 2012 7:55 AM

PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Thursday, May 03, 2012 10:07 AM
Over Driven Alternator pulley. 2.25 Ounces according to SoildWorks. This is the smallest diameter that a 15/16" x 1/2" drive impact socket will fit over.






Edited 1 time(s). Last edited Thursday, May 03, 2012 10:08 AM
Attachments
ld9-1818 reva solidworks.JPG (105k)
ld9-1818 reva solidworkscos.JPG (106k)


PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Saturday, May 05, 2012 5:16 PM
So how much just for the undersized alternator pulley of .75 ounces lighter than your older hard coated stock sized I have?

Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Monday, May 07, 2012 5:04 AM
Hope to keep it around $50.




PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Monday, May 07, 2012 10:58 AM
Addicted to meth wrote:

-Z Yaaaa- wrote:

hells yea! lightest underdrive pulley evar made!


I believe the one ebay pulley I use to have was like 14 ounces.

Regardless Md does great work. Finally got a Alternator pulley of his. just need to install it now.


I will have to weigh my Unorthodox Racing pulley. I think it is 13 or 14 oz too




Jason
99 Z24

LG0/LD9 for Life
10 Year Bash Veteren
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Thursday, May 10, 2012 8:48 AM
Prices are looking to be about.....for the group purchase.
This is for the LG0 sized crank and smallest alternator pulley I can make.
This was verbal, and may change slightly since the machine shop guessed on the material cost since they haven't received their quotes back. This should be 90-95% correct.

10 sets = $180 plus shipping.
15 sets = $165 plus shipping.
25 sets = $145 plus shipping.
50 sets = $125 plus shipping.


This is GREAT pricing.




PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: -MD- Pulleys, Discusion, Cranks and Alternators-Long Read-
Thursday, May 10, 2012 10:38 AM
Still going to be able to do stock sized light weight alternator pulleys by them selves this time around?


"Oil Leak ? What oil Leak ? Oh, Thats Just The Sweat From All The HorsePower!!"

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