Im looking for information on the OD of these underdrive pulleys. Does anyone have one laying around that is not installed yet, and could throw a tape measure on it real quick for me? Make sure to measure the area where the belt lays, not the larger OD of the shoulders that keep the belt from falling off the sides. thanks.



M90'd Built LGO-15 PSI
http://webstarts.com/quadper4mance

I take it your looking for an LD9 pully OD right?

Yes, LD9, LD2, or LGO specific, not Eco or anything. I Know the stock pulley sizes are LD9=6.5" LD2=6.5" LGO=5.5" But I need an even smaller one than 5.5", so I was wondering what the OD of these underdrives are. that may be a good solution to my problem.



M90'd Built LGO-15 PSI
http://webstarts.com/quadper4mance

Customcargrills has one that is 4.7", and BOMZ i think is about 4.5", but I would get the Custom car grills one over the BOMZ pulley ANY DAY. Better fit, and better aluminum used.

Click me!

If you need any pulley info or need a custom one just PM me or post it here. I know to much about LD9 pulleys. You need to know your competition well.




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

holy crap mike, where did that company come from?! ive never seen nor heard about those pullies before... pretty sweet lookin if you ask me.

do you know the weight of the RSM UD? i thought it was the lightest ever made? diameter of it?



I must confess... I feel like a monster!

Brad, If i remember correctly, it is the same size as an LGO crank pulley.
I have the weight somewhere on one of my old hard drives.



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

idk about that... ive got a bomz pulley as well as the rsm pulley. both look same size to me...





I must confess... I feel like a monster!

That is because BOMZ has changed its size a few times now. ~Shrugs~

Hold old is your BOMZ pulley?



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

pry 5 years.



I must confess... I feel like a monster!

According to 2005 when I looked at the BOMZ pulley it weighted in at 17oz. According to ebay as of today the BOMZ weighs in a 20.8oz.....which would be close..... to the 5.5" diameter. The Z-spec pulley I had was the same OD as the HO manual crank pulley. Their is also an AUTO stamped HO pulley.....that pops up from time to time, and it is the same OD as a LD9 crank pulley. If I remember correctly.




Brad weigh your BOMZ pulley....


Edited 1 time(s). Last edited Wednesday, October 21, 2009 12:07 PM

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

z yaaaa wrote:holy crap mike, where did that company come from?! ive never seen nor heard about those pullies before... pretty sweet lookin if you ask me.

do you know the weight of the RSM UD? i thought it was the lightest ever made? diameter of it?

x2 I never heard of them either. Not that I was looking for one, because I have a nice shiney Unorthodox pulley to use

I will measure my UR pulley tonight if I get a chance

I have a new BOMZ pulley for sale if anyone is looking for one




Jason
99 Z24 Supercharged
157hp/171tq - NA
190hp/170tq @ 6psi

LG0/LD9 for Life

Jason, could you guess on the size of the BOM.



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

well i saw jason's ad for the bomz pulley for sale and it is identical to the one i have.



I must confess... I feel like a monster!

rsm's....






I must confess... I feel like a monster!

God I hate to sound like a noob, but what does the underdrive pulley do in regards for the motor and what needs to be changed asides from the pulley? I appreciate the help thanks

I had a BOMz pulley at one time weight was 14 oz. Loved it.



FU Tuning

-MD- Enforcer wrote:Jason, could you guess on the size of the BOM.

I am pulling the pulley off my motor on Tuesday and will measure then. My Unorthodox pulley is 5.5" in diameter.




Jason
99 Z24 Supercharged
157hp/171tq - NA
190hp/170tq @ 6psi

LG0/LD9 for Life

John Higgins wrote:I had a BOMz pulley at one time weight was 14 oz. Loved it.

I do not understand why they changed the size so many times.



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

I think it is because you have 2 different companies making similar looking pullies. ASP had the original design and Bomz copied it for cheaper like OBX did with the Unorthodox design






Edited 1 time(s). Last edited Monday, November 02, 2009 4:26 AM

Jason
99 Z24 Supercharged
157hp/171tq - NA
190hp/170tq @ 6psi

LG0/LD9 for Life

I see, thanks!



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

My ASP, Bomz or whatever name it is pulley is 4.75" in diameter and weighs 21.2 oz




Jason
99 Z24 Supercharged
157hp/171tq - NA
190hp/170tq @ 6psi

LG0/LD9 for Life

Interesting.



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