csementuh

iTrader: (18)

MRZ any plans to make this in an overdrive configuration?

Such as a 4% overdrive at 6.5" (stock is 6.25") for us SS/SC folks looking for a little more boost...

HunterKiller89

iTrader: (1)

...why wouldnt you just drop supercharger pulley sizes.... going overdrive will waste more power driving the AC and alternator

MRZ - RedGTZ

We do not plan on making an overdriven pulley since there are already many options for those who wants to reduce the supercharger pulley size to get more boost. We can always do it as a custom sized pulleyif you wish to go that way...

Red07SSNA

part number 11589123: Bolt, Crankshaft w/Washer.....order at any GM parts house - or get one from CED.

The bolt is a torque-to-yield bolt, best not to reuse the original one. Factory service manual states to replace the bolt.

With the MRZ pulley (because it is aluminum) you will not torque the bolt to yield so you can reuse it again.

.....and you would be defeating the primary purpose -- more power -- of a lightweight pulley by overdriving the alternator and AC compressor just to speed up the supercharger.

drew1991sf

so wat would i need to order for the lightweight crank?? everything to get the job done

Red07SSNA

If you order the lightweight original sized pulley you would only need to order a bolt part number 11589123: Bolt, Crankshaft w/Washer -- you can reuse the same belt.

2.2 and 2.4 owners who get the UDP will need the smaller belt ACDelco PN 5K390 -- MRZ can supply those if you want.

Note on the belt tensioner: The only attach point is a 3/8 inch square hole -- not every belt tensioner tool will work. You can use a jack and a bar to move the tensioner to get the belt on and off.

csementuh

iTrader: (18)

I was just curious if MRZ was going to make an overdrive pulley similar to another supporting vendor to potentially attract those customers with their slightly lighter weight and better priced product...

Can anyone vouch for the performance increase with the lightweight pulley on a 2.0 SS/SC? Just faster revs or a little more power?

chevysssc

iTrader: (2)

add me chevysssc-red-lightweight lsj2.0-black stickers

MRZ - RedGTZ

Thanks for joining the group buy we need 2 more people!

We feel it is very easy already to adjust boost level as wanted with SC pulleys, the belt size might also be a problem with the oversized pulley...

Regarding the competition pulleys... We consider a crank pulley should not be a 2 pieces assembly for perfect balancing and strenght. We did look a this possibility in the past for cost reasons but we realized the pulley need to be made from a full chuck of billet aluminum for a perfect balancing and integrity. This cost more to produce for us, but this is far more accurate since this is a single piece and not an assembly.

csementuh

iTrader: (18)

Thanks for the info, I am considering joining this GP.

I do need to know however what if "felt" with this mod... Is there actual increase in power, or just some faster revs / better response..?

davekicksyourass

Are you any closer to having these ready? I would like to jump in on the group buy, but I really was interested in getting both pulleys at the same time. That way I can maybe save some money on the shipping and the install. So any updates?

CobaltLT

iTrader: (1)

Just say you want in...we need atleast 10...come on people...only 10 days left to order!!

knoxbox

bump for pulleys woo hoo we need at least 10 pls... i'm sure they'll do another group buy on alternator pulley later on.

Red07SSNA

I can't answer for the original size pulley, but the UDP on my 2.4 feels like it has quicker throttle response at low speeds.

MRZ - RedGTZ

We only need a few more people for this group buy... this is a great opportunity to save on the UDP or Lightweight pulleys

BTW the alternator lightweight pulleys will be available in approx. 2 weeks from now.

knoxbox

can we expect a group buy on alternator pulleys when they are available you guys rock.

bump for more to join the group buy...

Red07SSNA

How many people are taking advantage of this group-buy so Far?

knoxbox

look at first post it has the list.

07sunburst

do i pay for this now or wait?

knoxbox

wait till group buy is confirmed then you pay when they say too.

MRZ - RedGTZ

Once the alt. pulley will be ready, we can do a group buy if we get enough interest...

you can wait for the end of group buy before sending payment, thanks!

CobaltLs_14

that is what i'm waiting for!!!

knoxbox

bump for pulleys come on 2 more is all we need to get a group buy... i'd like to get 12 more people but looks like thats not going to happen.

CobaltLs_14

i'd do it but i already have one!!!

Red07SSNA

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