any updates?

 

Looks like we will do a Supercharger Pulley mount for the Fluidampr. We have received 3 different SC pulleys from 2 different customers. CT, SOS & Vortech. They have 2 different diameters and 3 different offsets. To reduce cost, we are going to make a single pulley diameter of 6" and make a single mount that we can mill to the different offsets.

The 6" pulley will over drive the CT & SOS by 9%. This will reduce belt slip for high HP systems or simply provide a little extra boost on top of the extra protection of the Fuidampr. The Vortech is 6" so it should drive that system normally.

Please let me know if you do have a SC system and are interested in a 6" pulley w/ a Fluidampr. Please email us. It will still be a few weeks to a month to finish design and manufacture due to the Holidays.

One thing to note is this is a much safer set up than mounting a pulley to the OEM damper. All OEM mounted SC pulleys are mounted directly to the inertia ring which means the damping is altered. Also, the inertia ring is bonded to the hub via rubber so the ring and thus SC drive system is experiencing the flex of the rubber. On top of that, the ring was not designed to take on the additional 20-40HP of the SC drive pulley, especially the additional torque due to the wider driver pulley.

Our SC pulleys are mounted of the hub and thus attached via solid metal. Fluidampr inertia rings are free floating inside the hub shell so damping is not altered. Not only will the Fluidampr offer extra protection, your SC system will have a solid drive vs having a rubber mounted SC pulley.

 

I've been talking with Urge through emails about this. I think going up to the 6" pulley for the SOS/CT kits, which uses a 5.5" crank pulley will benefit from it. Not having to run as small of a pulley on the blower will give you more surface area from the belt to the pulley, allowing you to run higher boost in an effort to also minimize belt slip.

Using this formula from ASP Performance CRANK DIAMETER / BLOWER DIAMETER = RATIO X RPM X 3.54 = IMPELLER SPEED

Here are the figures for the standard 5.5" crank pulley Vs. the 6.0" crank pulley on a AP1 @ 9000 RPM Using the 1200 Blower

The red indicates, based off of Science of Speed's pulley diagram the recommended pulley to impeller speed should not exceed this RPM

Blower Pulley / Impeller Speed(5.5" Crank Pulley) / Impeller Speed (6.0" Crank Pulley)
5.0" / 35046.00 / 38232.00
4.8" / 36506.25 / 39825.00
4.6" / 38093.47 / 41556.52
4.4" / 39825.00 / 43445.45
4.2" / 41721.42 / 45514.28
4.0" / 43807.50 / 47790.00
3.8" / 46113.15 / 50205.26
3.6" / 48675.00 / 53100.00
3.4" / 51538.23 / 56223.52
3.2" / 54759.37 / 59737.50
3.0" / 58410.00 / 63720.00

Here are the figures for the standard 5.5" crank pulley Vs. the 6.0" crank pulley on a AP2 @ 8000 RPM Using the 1200 Blower

The red indicates, based off of Science of Speed's pulley diagram the recommended pulley to impeller speed should not exceed this RPM

Blower Pulley / Impeller Speed(5.5" Crank Pulley) / Impeller Speed (6.0" Crank Pulley)
5.0" / 31152.00 / 33984.00
4.8" / 32450.00 / 35400.00
4.6" / 33860.86 / 36939.13
4.4" / 35400.00 / 38618.18
4.2" / 37805.71 / 40457.14
4.0" / 38940.00 / 42480.00
3.8" / 40989.47 / 44715.78
3.6" / 43266.66 / 47200.00
3.4" / 45811.76 / 49976.47
3.2" / 48675.00 / 53100.00
3.0" / 51920.00 / 56640.00

So from SOS's site to be at the same boost levels with the 5.5" pulley going to the 6" pulley, you would need to increase the blower pulley diameter by about 0.3"-0.4"

This is just estimated impeller speeds based off of the formula given. I know there are some that are over spinning the blower. I just wanted to shed some light on the fact for those trying to attain higher boost levels, would be able to run a larger pulley on the blower, reducing the possibilities of belt slippage by using a larger blower pulley.

Thanks again to Urge for giving us the option of a blower pulley on an aftermarket SFI balancer.

 

That's great news, finally a Fluidampr that is compatible with our blowers!!

Increasing the crank pulley diameter from 5.5 to 6.0 for the SOS guys is a good call. I'm personally running a custom 6" ASP pulley on my SOS kit which has allowed me to run a larger blower pulley and mitigate belt slip. You get a little extra boost and the margin to grow in the future should you choose a smaller blower pulley.

I can attest that the 6" pulley does indeed fit the SOS bracket/tensioner/setup without any clearance issues. For reference, running a 2.8" blower pulley with the SOS crank pulley is equivalent to running a 6" Urge crank pulley and 3.1" blower pulley. That increase from 2.8 to 3.1 is a great difference as far as belt wrap goes!

One thing I want to emphasis on is Urge's last statement. I had not realized with the SOS/CT/Vortech kits that the mounting method of the drive pulley is not direct. The OEM damper pulley is actually 2 pieces where the inner hub and outer pulley are mated via a rubber ring. I don't even want to think about what the blower Load does in terms of strain to that rubber ring. With the Fluidampr bolting directly to the hub is a great safety margin to have.

 

Is this something that could help reduce clutch buzz by dampening vibration?

Tim

 

The clutch is on the other side of the crank, so any I feel any reduction would be small.

I have noticed reduced valve train noise, but that system is driven off the crank, specifically the front of the crank where the damper sits.

 

I would like to get in on this intro pricing. How/where do I send payment? I tried to PM Urge but it would not go through.

Scott-

 

We have kept our PMs off to limit forms of communication. Looks like we will have to turn on as too many people use them.

Either way, please email us your Name, Shipping info w/ phone number for shipping. We will look up shipping cost and email an invoice.

 

Dampers are in the shop, we have been shipping out the dampers weekly.

 

I used a fluidampr on my old k series car and loved it. Cant wait to get one of these for my s2000