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SRT-6 SUPERCHARGER PULLEY

 

LET'S GET SOME SERIOUS BOOST GOING!

 

The Supercharger (SC) pulley and Crank (CP) pulley, as seen on schematic at point 5 and 1 [HERE] , are two pulleys that can be upgraded to other diameter dimensions and material to increase the performance of the SRT-6. They increase boost, torque and can make the SRT-6 make the 1 / 4 mile in a stunning 11.5 seconds, if not faster.

 

 

MODIFYING WILL GENERATE MORE HEAT!

 

Note: When modifying the pulleys, more RPM will come out of the supercharger and more heat will be generated. Hence cooling modifications such as supercooler, killerchiller and isolation kits may be necessary to increase prolongevity of the supercharger. Below we will go through the OEM pulleys, different types of upgrades pulleys, brands, figures and general information. If you want to calculate how many RPM your SRT-6 supercharger is running click [HERE] for a very useful equation.

 

 

SUPERCHARGER PULLEY, CRANK PULLEY OR BOTH

 

How: The pulleys can as mentioned be swapped and there are three ways to do this. One, simply just exchange your OEM factory SC pulley with an aftermarket SC pulley. Two, swap your OEM factory Crank Pulley to an aftermarket CP pulley. Or lastly, three, do both at same time, this being called “running stacked”. If you want to calculate and see what supercharger and/or crank pulleys to use, click [HERE] to use a very useful equation to determine these data.

 

 

MATERIAL OF SUPERCHARGER PULLEY

 

Material: Choice of material have always been an issue. Steel vs. aluminum. Heavy vs. light rotation. Aluminum pulleys, have been causing problems. Code 3, Eurocharged had problems. Stay with steel, you could say, but, even Karmann had issues here, with the backing plate grenading.

 

 

1. SRT-6 OEM FACTORY 74 MM SUPERCHARGER PULLEY

 

SRT-6 OEM Factory SC Pulley diameter: 74.2 mm

Bearing: NSK #32BD45DUM1 (#32BD45DUM, #32BD45DU, 32BD45-A-1T12DDUCG21)

Material: Steel

Weight: 1185 g, 41.8 oz

Price: Approx. 400 USD (2015)

Country: Germany

Still in production: No, 2001-2006 (?)

More information: The stock SC pulley is made out of steel and is rigid in quality.

 

 

2. SRT-6 EUROCHARGED 64.7 MM SC PULLEY

 

SRT-6 Eurocharged SC Pulley diameter: 64.7 mm

Bearing: NSK #32BD45DU

Material: Steel or Aluminum depending on generation

Weight: 816.46 grams, 28.8 oz (gen 2 black aluminum)

Price: Approx. 475 USD

Country: USA

Still in production: Yes

More information: Generation 1 was steel. Current batch is made out of aluminum and is black.

Check out the pulley [HERE] on CrossfireMarket.com

 

 

3. SRT-6 EUROCHARGED 61 MM SC PULLEY

 

SRT-6 Eurocharged SC Pulley diameter: 61.9 mm

Bearing: NSK #32BD45DU

Material: Aluminum

Weight: 646.36 grams, 22.8 oz

Price: Approx. 500 USD

Country: USA

Still in production: No, 2014

More information: This EC pulley is substantially lighter due to the use of aluminum. Not sure if the benefit of lightness will outweigh the sturdiness of steel, but time will tell. So far Nick B. and another crossfire forum member have failed pulleys. Philip Bee, using this pulley as a daily have no issues so far. Adam aka SRT-6 Black Series also have no issues at this point.

 

 

4. SRT-6 CODE3 C3 PERFORMANCE 65 MM SC PULLEY

 

SRT-6 Code3 C3 SC Pulley diameter: 63.7 mm

Bearing: NSK #32BD45DUM

Material: Steel (gen 1+2) aluminum (gen 3)

Weight: 929.8 grams, 32.8 oz (gen 2)

Price: N/A

Country: USA

Still in production: No, 2008-2009

More information: Cut grooves aka breaks, were made on one generation and were supposed to give better grip on the belt, but ended up either chewing up the belt or giving less grip. True or not, hard to get a conclusion as some people thought it was happening due to install error. Regarding choice of material, the initial run was aluminum. Later they were switched to steel as there were some manufacturing problems with the aluminum pulleys. But the gen 1 was made of steel and had the cut grooves. Gen 2 was also made of steel but had no cuts in the grooves and looks very much similar to OEM factory SC pulley. Gen 3 was made of anodized aluminum and had no cuts in the grooves. Looks similar to stock, but different metallic color and is lighter.

 

 

5. SRT-6 CODE3 PERFORMANCE 69 MM SC PULLEY

 

SRT-6 Code3 C3 SC Pulley diameter: 69 mm

Bearing: N/A

Material: N/A

Price: N/A

Country: USA

Still in production: No, 2008-2009

More information: This so-called mid-sized SC pulley was made to be used together with an upgraded 178 mm crank pulley.

 

 

6. SRT-6 KARMANN 62 MM SC PULLEY

 

SRT-6 Karmann SC Pulley diameter: 62 mm

Bearing: NSK #32BD45DUM

Material: Stainless steel

Weight: N/A

Price: 650 USD

Country: China

Still in production: No, 2013-2014

More information: Manufactured by Mr. Khang Vo in China and group buy initiated by Rudy on Crossfire forum. This pulley uses a shoulder spacer. Forum members such as Bob, RedDog, Lenin has failed pulleys due to backing plate issues.

 

 

7. SRT-6 OESTERLE PERFORMANCE 63 MM SC PULLEY

 

SRT-6 Oesterle Performance SC Pulley diameter: 63 mm

Bearing: NSK #32BD45DU

Material: Stainless steel

Weight: N/A

Price: N/A

Still in production: Yes

More information: Only available together with their tuning software.

 

 

8. FIXED SUPERCHARGER PULLEY

 

There is also a possibility to get a fixed supercharger pulley in various sizes and material. This pulley will always be engaged and no clutch slippage can occur. No boost lag from the moment you step on the gas pedal. No Bearing trouble and rattling sound. Increased boost around 3 - 3.5 psi which will add 30hp-40hp. 70% less weight than the original pulley which will reduce engine load. Although, having an engaged supercharger pulley at all time will increase gas consumption, the clutch will never disengage when the IATs gets to high, they will be increased for sure, and the ECU computer might be acting up.

 

 

OTHER SRT-6 SUPERCHARGER MANUFACTURERS

 

There are other manufacturers out there that can be found on e-bay and other markets on the internet, i.b. being one of them but very little information is to be seen

 

 

HOW TO INSTALL / DIY

 

Click [HERE] to get install instructions. Credits: Eurocharged.com

 

 

SOURCES

 

OEM Factory SRT-6 Supercharger Pulley
Eurocharged 64.7mm Supercharger Pulley SRT-6

The SC pulley can be swapped to an aftermarket SC pulley wth a different diameter size, making the supercharger spin faster, creating more boost, making the SRT-6 go faster.

1. SRT-6 OEM Factory SC Pulley  74mm, back.

1. SRT-6 OEM Factory SC Pulley 74mm, back.

2. SRT-6 Eurocharged  SC Pulley, 64.7 mm.

2. SRT-6 Eurocharged SC Pulley, 64.7 mm, gen 1 made out of steel.

2. SRT-6 Eurocharged  SC Pulley, 64.7 mm.

2. SRT-6 Eurocharged SC Pulley, 64.7 mm, gen 2 made out of aluminum and black.

3. SRT-6 Eurocharged SC Pulley, 61.9 mm.

3. SRT-6 Eurocharged SC Pulley, 61.9 mm.

4. SRT-6 Code3 SC Pulley, 63.7 mm, gen 1+2.

4. SRT-6 Code3 SC Pulley, 63.7 mm, gen 1+2.

Measurement comparison between  the Eurocharged and Code 3 SC Pulley for the SRT-6.

Measurement comparison between the Eurocharged and Code 3 SC Pulley for the SRT-6. As we can see, it is not the snout measurement that is important but the groove peaks. Remember, size it is not all, quality of material does also matter when it comes to prolongevity.

6. SRT-6 Karmann SC Pulley, 62 mm.

6. SRT-6 Karmann SC Pulley, 62 mm.

7. SRT-6 Oesterle Performance SC Pulley, 63 mm.

7. SRT-6 Oesterle Performance SC Pulley, 63 mm.

8. Fixed Supercharger Pulley for the SRT-6.

8. Fixed Supercharger Pulley for the SRT-6.

Stay away from used/broken Supercharger Pulleys.

Be sure to check the SC Pulleys when buying used ones.

Get the right distance!
Install the SC Pulley correctly using shims.

Install the SC Pulley correctly using shims. There should be a gap of .20-.30 mm between the backing plate of the pulley and the magnetic clutch.

Unlucky!

Supercharger Pulley SRT-6 failure. Be sure to use the Latemodel21 Supercharger Pulley Protection Shield to stay safe! Click [HERE] to check it out in CrossfireMarket.com

Video above: How to change the supercharger pulley with one hand only!

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