stg 2 ; would you change the S/C or the crank pulley?

**waxxonMTL** · 05-22-2016 07:43 AM

Since about 6 month now.. maybe a bit more, OD crank pulley have been available. To get stg 2 performance, you can either change de S/C pulley or the OD crank pulley (which end up being the same ratio as having the S/C smaller pulley).

Now that there's a choice, which one would you go ? the crank or the s/c ?

**fitzydude** · 05-22-2016 07:50 AM

I went with the oversized crank pulley. I think the smaller supercharger pulley puts greater stress on the OEM harmonic balancer and causes it to fail even sooner than it already would. I just wanted to replace it before it became an issue, it was like knocking out two birds with one stone.

Also consider that most tuning companies force you to buy the smaller sc pulley with their tune

**BlownOne** · 05-22-2016 09:19 AM

Both Lol

**OnEaNgRyBuNnY** · 05-22-2016 11:03 AM

If I were doing it again, I'd go with the oversized crank pulley and if I wanted to go dual-pulley route I'd probably go with an even larger oversized pulley and just leave the s/c pulled alone for ease of installation.

Did I hear or see somewhere that the last years of these engines had bolt on and not pressed on s/c pulleys?

Sent from my iPhone using Tapatalk

**LittleDozer** · 05-22-2016 02:56 PM

Wait less than a month and Fluidampr will have a crank pulley that will make just as much power, if not more, than current dual pulley setups.

**infinkc** · 05-22-2016 03:41 PM

Go crank pulley as you replace a prone to failing part also. Even people with the stock sc pulley have their crank pulley fail.

**DBL R** · 05-22-2016 07:52 PM

Originally Posted by LittleDozer

Wait less than a month and Fluidampr will have a crank pulley that will make just as much power, if not more, than current dual pulley setups.

Stuff like this is why I haven't gotten a tune or installed any big parts, I'm waiting for a little more progress in this platform....

**eurotic** · 05-22-2016 08:09 PM

Originally Posted by LittleDozer

Wait less than a month and Fluidampr will have a crank pulley that will make just as much power, if not more, than current dual pulley setups.

You have inside information on this?

**LittleDozer** · 05-22-2016 08:11 PM

Originally Posted by eurotic

You have inside information on this?

If you are on Facebook, one of the team involved with testing (and also active on AZ) posted to the B8/B8.5 S4 group with some pricing info, size options and timing.

**waxxonMTL** · 05-22-2016 08:42 PM

i doubt the credibility of the source tbh lol.

**evil35r** · 05-23-2016 06:07 AM

Fluidampr plus epl stage 2 sounds interesting.... I'm stage 1 epl now. I don't think that could make more power than dual pulley maybe in between though without having to get the cooling kits? Thoughts? If I'm wrong how will the fluidampr make more power than dual pulley? Would cooling kits be necessary?

**eurotic** · 05-23-2016 07:08 AM

Originally Posted by evil35r

Fluidampr plus epl stage 2 sounds interesting.... I'm stage 1 epl now. I don't think that could make more power than dual pulley maybe in between though without having to get the cooling kits? Thoughts? If I'm wrong how will the fluidampr make more power than dual pulley? Would cooling kits be necessary?

I think regardless of if you had dual pulley or single pulley if the net effect is spinning the supercharger x percent faster than stock then you are going to need the same supporting mods like cooling.

**evil35r** · 05-23-2016 07:13 AM

Right good point. So we need to figure at what point we need cooling... cause cooling isn't required for just a single pulley either sc or crank. But dual pulley it is required. So with this new fluidampr pulley would it still be below the threshold of the dual pulley. Like I said in my last post in between almost like stage 2+? I am going to change my crank and not my sc pulley and don't want to have to add cooling plus I live in new England so it doesn't matter as much anyways but this fluidampr epl stage 2 tune seems like a good bet to get a little more power over the cts sc pulley. Guess we'll have to wait and see.

**BlownOne** · 05-23-2016 10:34 AM

Any pd blower can benefit from cooling upgrades, even when bone stock.

**LittleDozer** · 05-23-2016 10:52 AM

Any dual pulley car should have an upgraded cooler. I'm throwing AWE ColdFront FMIC+Reservoir on mine. The benefit of fluidampr over JHM crank is that it is harmonized due to a core that eliminates vibration. Other cars that run fluidampr see gains over what solid aluminum cranks see. You can push more power without worrying as much about increased engine wear.

**Loe** · 05-23-2016 11:09 AM

Originally Posted by LittleDozer

Any dual pulley car should have an upgraded cooler. I'm throwing AWE ColdFront FMIC+Reservoir on mine. The benefit of fluidampr over JHM crank is that it is harmonized due to a core that eliminates vibration. Other cars that run fluidampr see gains over what solid aluminum cranks see. You can push more power without worrying as much about increased engine wear.

You'll love the AWE unit, so far I'm enjoying my lower IAT's. Love being able to hit all of my ignition timing targets consistently each time I hit the gas pedal down on a 93 pump file with an E30 mix (summer set-up just to be on the safe side).

**LittleDozer** · 05-23-2016 11:11 AM

Originally Posted by Loe

You'll love the AWE unit, so far I'm enjoying my lower IAT's. Love being able to hit all of my ignition timing targets consistently each time I hit the gas pedal down on a 93 pump file with an E30 mix (summer set-up just to be on the safe side).

Yeah I'm excited, especially with the full E85 tune already. Should be a good combo.

**evil35r** · 05-23-2016 11:31 AM

So is let's say a cts sc pulley going to spin the sc just as fast as with a jhm od crank pulley?

**mrmomo313** · 05-23-2016 01:52 PM

Originally Posted by evil35r

So is let's say a cts sc pulley going to spin the sc just as fast as with a jhm od crank pulley?

jhm od crank pulley alone will perform similar to a supercharger pulley alone, so yes.

**Danny2323** · 05-23-2016 03:58 PM

Originally Posted by evil35r

So is let's say a cts sc pulley going to spin the sc just as fast as with a jhm od crank pulley?

**evil35r** · 05-23-2016 04:16 PM

Nice! That's winning

**evil35r** · 05-23-2016 04:18 PM

So when is fluidampr comming our with their pulley? Soon?

- - - Updated - - -

Also how hard is it to replace the crank pulley easier orb harder than a sc pulley swap?

**waxxonMTL** · 05-24-2016 07:54 AM

folks... pulled trigger on stage 2 93 octane.. 2013 CPO.. if I still want a chance to get warranty work done on my car, the logical choice would be to swap the S/C pulley right ? since an OD crank pulley will be detected as soon as the tech open the hood ?

is that a resonable logic or should i ''man up'' and go crank pulley anyways ? Not gonna lie.. i like to keep things as reliable as possible and i would prefer to see a dampered crank pulley than a solid piece of CNC ( no matter what JHM is telling us..). Then, if i play advocate, how can i be sure that fluidamper or even ATI damper has the right dampered frequencies ? lolll

I can see myself going dual pulley 93 tune after my cpo warranty is done ( in 16 months), but till then, think I will stay stage 2 for a while.

**613B6** · 05-24-2016 08:15 AM

The fluidampr is done, I had it in my hands on Friday. There will be a post coming up shortly.

**kcobourn** · 05-24-2016 09:19 AM

Originally Posted by waxxonMTL

folks... pulled trigger on stage 2 93 octane.. 2013 CPO.. if I still want a chance to get warranty work done on my car, the logical choice would be to swap the S/C pulley right ? since an OD crank pulley will be detected as soon as the tech open the hood ?

is that a resonable logic or should i ''man up'' and go crank pulley anyways ? Not gonna lie.. i like to keep things as reliable as possible and i would prefer to see a dampered crank pulley than a solid piece of CNC ( no matter what JHM is telling us..). Then, if i play advocate, how can i be sure that fluidamper or even ATI damper has the right dampered frequencies ? lolll

I can see myself going dual pulley 93 tune after my cpo warranty is done ( in 16 months), but till then, think I will stay stage 2 for a while.

As long as you've got belts on your pulley's when you get the warranty work done you SHOULD be fine. Unfortunately for me that wasn't my story though ... my belts tore off when my crank blew & made it easy to see the aftermarket SC pulley. The tech blamed the pulley. I didn't get TD1 though since I towed my car to my APR dealer for a reflash first. FWIW this was a total dick move by the dealer. The unpaid labor their tech went through to NOT replace a mechanical part under warranty is mind blowing!

**yjypm** · 05-24-2016 10:20 AM

Originally Posted by kcobourn

As long as you've got belts on your pulley's when you get the warranty work done you SHOULD be fine. Unfortunately for me that wasn't my story though ... my belts tore off when my crank blew & made it easy to see the aftermarket SC pulley. The tech blamed the pulley. I didn't get TD1 though since I towed my car to my APR dealer for a reflash first. FWIW this was a total dick move by the dealer. The unpaid labor their tech went through to NOT replace a mechanical part under warranty is mind blowing!

You should have swapped back your oem pulley before going to the dealer.
Since you haven't got TD1 you should get your oem pulley back and try another dealer.

**yjypm** · 05-24-2016 10:23 AM

If I get dual pulleys should I use the OEM belt or the belt comes with sc pulley?
My logic tells me OEM belt should be a better fit though.

**kcobourn** · 05-24-2016 10:29 AM

Originally Posted by yjypm

You should have swapped back your oem pulley before going to the dealer.
Since you haven't got TD1 you should get your oem pulley back and try another dealer.

Yup you're 100% correct ... my tuner failed to remind me & I didn't think about it.

Ugh.

**Dakkath** · 05-24-2016 11:33 AM

We need a damn poll for these pulley failures. From the recent topics I've read, most OEM pulley's are failing after xx miles with a aftermarket SC pulley, however some are failing w/o aftermarket SC pulley.

But have we had any pulley failures with the overdrive JHM pulley? Would be nice to get some data around this to make informative decisions when going stg2. I apologize if this has been done before, I'm sort of new to this sub forum.

**mavz** · 05-24-2016 01:04 PM

Originally Posted by Dakkath

We need a damn poll for these pulley failures. From the recent topics I've read, most OEM pulley's are failing after xx miles with a aftermarket SC pulley, however some are failing w/o aftermarket SC pulley.

But have we had any pulley failures with the overdrive JHM pulley? Would be nice to get some data around this to make informative decisions when going stg2. I apologize if this has been done before, I'm sort of new to this sub forum.

I wonder if there's an OD pulley setup that's been run long enough to know... I'm hoping someone chimes in :)

**Loe** · 05-25-2016 05:27 AM

Originally Posted by yjypm

If I get dual pulleys should I use the OEM belt or the belt comes with sc pulley?
My logic tells me OEM belt should be a better fit though.

It's best to just use the belt that comes with the pulley.

**mrmomo313** · 05-25-2016 08:32 AM

Originally Posted by waxxonMTL

folks... pulled trigger on stage 2 93 octane.. 2013 CPO.. if I still want a chance to get warranty work done on my car, the logical choice would be to swap the S/C pulley right ? since an OD crank pulley will be detected as soon as the tech open the hood ?

is that a resonable logic or should i ''man up'' and go crank pulley anyways ? Not gonna lie.. i like to keep things as reliable as possible and i would prefer to see a dampered crank pulley than a solid piece of CNC ( no matter what JHM is telling us..). Then, if i play advocate, how can i be sure that fluidamper or even ATI damper has the right dampered frequencies ? lolll

I can see myself going dual pulley 93 tune after my cpo warranty is done ( in 16 months), but till then, think I will stay stage 2 for a while.

I think you answered your own question lol. Do the SC pulley then after CPO slap the OD one on. Or just man up

Originally Posted by yjypm

If I get dual pulleys should I use the OEM belt or the belt comes with sc pulley?
My logic tells me OEM belt should be a better fit though.

Use the belt that JHM supplies

Originally Posted by Dakkath

We need a damn poll for these pulley failures. From the recent topics I've read, most OEM pulley's are failing after xx miles with a aftermarket SC pulley, however some are failing w/o aftermarket SC pulley.

But have we had any pulley failures with the overdrive JHM pulley? Would be nice to get some data around this to make informative decisions when going stg2. I apologize if this has been done before, I'm sort of new to this sub forum.

I honestly doubt you will own the car long enough to have the JHM crank fail after the stock one fails... The stock crank is failing around 55-70k miles for those that have posted on here and AR. I swapped my stock one at 65k miles with the JHM OD pulley as preventative maintenance and don't see this new one failing within the next 60k miles

**waxxonMTL** · 05-25-2016 09:03 AM

Originally Posted by mrmomo313

I think you answered your own question lol. Do the SC pulley then after CPO slap the OD one on. Or just man up

Use the belt that JHM supplies

I honestly doubt you will own the car long enough to have the JHM crank fail after the stock one fails... The stock crank is failing around 55-70k miles for those that have posted on here and AR. I swapped my stock one at 65k miles with the JHM OD pulley as preventative maintenance and don't see this new one failing within the next 60k miles

cant see the JHM failing since its a one piece.. what fail is the rubber tear from the metal. isn't ?

**mrmomo313** · 05-25-2016 09:09 AM

Originally Posted by waxxonMTL

cant see the JHM failing since its a one piece.. what fail is the rubber tear from the metal. isn't ?

Yea, this piece is going to last a long while. With the Oem crank, the inner portion of the pulley separates from the outer at the rubber isolator connection

**sittinlow** · 05-25-2016 11:16 AM

I will be using the CTS pulley they sent me and then the JHM HD lightweight crank pulley for preventative maintenance.

**LaCross** · 05-25-2016 03:48 PM

How exactly does a smaller sc pulley cause the crank pulley to fail?

**eurotic** · 05-25-2016 04:07 PM

Originally Posted by LaCross

How exactly does a smaller sc pulley cause the crank pulley to fail?

Just like peddling a bike it requires more effort as you go to the smaller gears on the wheel. It adds to the stress the crank pulley must deal with.

**cjw** · 05-25-2016 04:08 PM

Seems odd there would be any extra stress over 6mm diameter. I guess the extra RPM might take more power to turn. I'm just wondering if it's more of an age/mileage thing than a slightly smaller pulley.