URD 2.85 stealth supercharger pulley install

bluezzy · Nov 13, 2016

I think I've been told that the super charger needs to be dealer service every one hundred thousand miles... I just had mine done last month. Since the smaller pulley turns the supercharger faster does it need service more often? just wondering.

VolcomTacoma · Nov 13, 2016

$100 for red, or $150 for a black one that just says 3.0 on it to fool the oil jockeys at the dealer

VolcomTacoma · Nov 13, 2016

I would not wait 100k miles to service it. I'll probably be doing mine every 30-50k miles just to keep fresh oil in there and make sure nothing is over wearing. Maybe its overkill, but I bolted a $5000 part to a $35000 truck that has the possibility of causing catastrophic failure, I'm gonna go ahead and make sure nothing can go wrong that I can.

bluezzy said: ↑

I think I've been told that the super charger needs to be dealer service every one hundred thousand miles... I just had mine done last month. Since the smaller pulley turns the supercharger faster does it need service more often? just wondering.
Click to expand...

bluezzy · Nov 13, 2016

VolcomTacoma said: ↑

I would not wait 100k miles to service it. I'll probably be doing mine every 30-50k miles just to keep fresh oil in there and make sure nothing is over wearing. Maybe its overkill, but I bolted a $5000 part to a $35000 truck that has the possibility of causing catastrophic failure, I'm gonna go ahead and make sure nothing can go wrong that I can.
Click to expand...

Now there's a good attitude, nothing wrong with more preventative maintenance at all.

now I just need to find someone who can help me install a pulley.

Hot Tacoma Blown · Nov 14, 2016

Look at urd for more goodies.But Maintance keeps everything running g r e a t!!!!!!! Scream on baby scream on!

bluezzy · Nov 29, 2016

crashnburn80[OP] initial post: ↑

This covers the install of the URD 2.85" stealth pulley on the 4.0L TRD supercharger, replacing the factory 3.0" pulley.

The smaller URD pulley spins the supercharger faster raising boost levels from 6.0psi to 8.0psi. The factory 6psi boost results in 69hp and 69ft/lbs, meaning 11.5hp/psi boost. With an additional 2psi, I estimate it should result in approximately 20-23hp, pushing the supercharger output to ~89-92hp over stock. URD claims 15-30hp depending on ambient conditions. The pulley is designed to look extremely similar to the OEM pulley to avoid factory detection. It is printed as a 3.0 pulley even though it actually is a 2.85.

While there are more aggressive URD pulleys are available, they also require cascading fuel system upgrades. And roots blowers typically loose significant efficiency at high boost levels. I believe in moderation in mods for best outcome, hence my choosing of the 2.85 pulley. This pulley makes the most of the factory system without requiring additional modifications.

Though looking at the pulleys side-by-side the matching design is close but isn't perfect. The OEM pulley has a printed part number and a gloss finish. The URD pulley has an engraved part number and a matte finish. It is also printed as a 3.0 but the stock one is printed as 3.00. But is likely to go unnoticed by all but the most experienced detail oriented master techs.

Parts needed
URD 2.85 stealth pulley

Special tools needed for this project.
3 jaw pulley puller tool
URD supercharger pulley install tool
Strap wrench
Friend to assist

Step 1
Before starting it is critical that the truck sits overnight so it is completely cold as the install is based on temperature delta from the hot pulley to the cold truck. I waited till winter to do this project so the truck would be as cold as possible.

Step 2
Remove the front skid plate.

Step 3
From underneath the front of the truck, use a 1/2" drive socket and place in the supercharger tensioner bracket and torque toward radiator fan to release tension on the supercharger belt. While holding in this position, have your friend pull belt off the supercharger pulley.

1/2" drive on tensioner bracket:

Belt removed from supercharger pulley:

Step 4
Using a quality 3 jaw pulley puller remove the OEM 3.0" supercharger pulley. First wrap pulley in strap wrench to keep the pulley from spinning. For claw clearance reasons I had to remove the guide pulley sub assembly below the main supercharger pulley as my pullers claws did not fit. My 'forged' Harbor Freight puller ended up shearing off the claw end of the tool in a dramatic catastrophic failure under load. Fortunately the claws were reversible, so I reversed the puller claw and tried again. This was like playing Russian roulette except you keep pulling the trigger knowing it is going to go off. Again it sheared off the other forged claw sending steel parts flying at great speed under load. Frustrated with POS tools I went to Sears and bought a beefy ratcheting Craftsman puller rated at 5 tons. It was pricey but I knew it would do the job without question. It also had better designed claws that did not have the clearance issues of the HF puller. The Craftsman puller screw was too long to put a socket wrench over the end of the puller once it was installed, so I had to get creative and remove the upper radiator shroud to make room for the tool and use the locking crescent wrench extension method to break the pulley free. The Craftsman puller made quick work of the pulley. Quality tools are worth it every time. Unfortunately the removal damaged the OEM pulley by warping it at the claw points. Meaning I was now past the point of no return.

Removal of guide pulley sub assembly:

Craftsman puller vs catastrophic failure of HF puller:

Removing OEM 3.0 pulley:

Pulley removed:

Step 5
The URD instructions state to boil the pulley to heat it up so the center hole expands allowing it to be installed on the supercharger shaft. As heat is transferred to the supercharger shaft from the hot pulley and the pulley cools down it will permanently mount to the shaft. It is critical to get the pulley fully installed before this happens. To make the install easier, I would strongly suggest baking the pulley to obtain a higher temperature as other members have done. I set a toaster oven right next to the truck to minimize transfer time and baked the pulley for an hour at a setting of 300 degrees. When checking the pulley temperature with my IR temp gun it read 340 degrees. So much for accurate toaster oven controls but figured the extra heat couldn't hurt.

Step 6
Assemble and grease the URD tool. Make sure to insert the threaded nose piece with the allen key side going into the tool. So when it gets stuck in the SC snout after you remove the tool you can use an allen key to remove it. I greased the full length of the tool, the bearings, washers and threaded nose section to make the install as easy as possible.

Assembled URD pulley install tool:

NOTE: the threaded nose piece should NOT be fully installed into the tool. Because the supercharger nose is tapered to allow the seating of a pulley removal tool, the entry area is not threaded. This means the threads must extend further into the supercharger nose to bite. I threaded mine into the tool all the way and then into the SC nose. Half way through the install I sheared the threads out of the SC nose due to inadequate depth and the tool came apart under load and was scattered everywhere inside the engine bay. Worst thing possible in a time critical install. Probably would have been SOL if I hadn't heated the pulley in the oven and instead followed the instructions to boil. Fortunately was able to remain (semi)calm and locate all the parts, to reassemble the tool and carry on. I would suggest installing the threaded nose piece into the supercharger snout first, then once the pulley is held in place install the tool onto the threaded nose piece.

Step 7
Installing the pulley is not an easy task. Lube the SC shaft with conventional motor oil as instructed in the URD instructions. It is a good idea to practice the install execution with your friend using the factory pulley as you will only get one shot at the install. Using heat protective gloves remove the pulley from the oven, place in position, place strap wrench over pulley, and insert install tool. You can place a wrench over the end of the pulley installer and lock it against the battery if you have a wrench long enough, reducing one job needed on the install. Then have one person hold the strap wrench on the pulley while the other person cranks on the nut with an open ended wrench as quickly as possible. Do. Not. Stop. It will be moderately easy at first then increase in difficulty as the shaft heats up and the pulley cools off till it is permanently mounted. It is extremely critical that you get it all the way on before this happens. My install went horribly wrong as mentioned above, but I was still able to get it on, though at the end of the install I was using my full body weight to force the pulley on against its will. The tool is designed in such a way that you cannot over press on the pulley, it will stop when seated flush.

URD pulley install tool installed on supercharger snout (picture is post install for illustration):

Wrenches on URD pulley install tool (Picture is post install for illustration, missing strap wrench on pulley):

Step 8
Drink a beer and relax knowing you didn't royally screw this up (hopefully).

Step 9
Repeat step 2 to ease the tensioner on the SC belt and while holding in that position reinstall belt over the new pulley. Double check the belt routing to make sure it didn't come off anywhere else while not tensioned.

URD pulley installed and belt reapplied:

Step 10.
Fire it up and enjoy the extra boost!

Final polish step needed is to find some orange torque seal and dab the pulley to shaft interface like the stock one had so it does't look like the pulley was ever removed. Comparing colors to other members with superchargers there seems to be many colors used, so an exact match is likely not necessary, just an approximation.

Driving impressions: Boost comes on sooner and is more responsive. Most noticeable off the line, the truck pulls harder across the entire RPM band. My poor KO2s will pay the price. Unlike other naturally aspirated products that may claim a peak HP increase, the boost increase across the RPM band results in noticeable power increase everywhere, not just near redline. Assuming a good install, the $200 spent on the pulley and install tool provide a good performance return for the cost, especially compared to the base price of the supercharger. I scored my pulley from another member on TW so it only cost me $100 instead of $150.

I highly recommend this product for anyone with the supercharger, especially given the price. It feels as if it should have come this way from the factory. As was put in another thread, the supercharger wakes up the Tacoma. The 2.85 pulley wakes up the supercharger.
Click to expand...

I had no idea the difference was going to be this damn insane!! I'm seriously wondering if I should install stronger seat bolts!

crashnburn80 · Nov 29, 2016

bluezzy said: ↑

I had no idea the difference was going to be this damn insane!! I'm seriously wondering if I should install stronger seat bolts!
Click to expand...

It does make the supercharger way more fun. Compared to the $5k for the charger, the extra boost for $150 is a no-brainer.

bluezzy · Nov 30, 2016

crashnburn80[OP] said: ↑

It does make the supercharger way more fun. Compared to the $5k for the charger, the extra boost for $150 is a no-brainer.
Click to expand...

do you happen to know what the rev limiter is set at?

Torspd · Nov 30, 2016

Factory is 5500.

Hot Tacoma Blown · Nov 30, 2016

Hey if you have the uconn from urdusa it bumps to 6200.pulls like a freight train check out urdusa for goodies.

Hot Tacoma Blown · Nov 30, 2016

I installed the 2.74" .More fun headers 7th injector spraying meth cold air.

motozack · Dec 16, 2016

I installed my 2.85 "stealth" pulley today on my recently purchased magnuson.
Pretty easy.
This is a great write up. Just a couple side notes from my experience.
Worked on it in the morning when truck was cold.
•I was able to access the belt tensioner fairly easy by using a 1/2 drive ratchet and reaching my left arm down between the wiper fluid & the radiator shroud. THEN UNDER THE FAN. Was able to free tension with my left hand while at the same time freeing the belt from the S/C pulley with my right hand. (Saved some time vs removing skid plate and crawling underneath)
•when removing original pulley with the puller, the pulley will appear not to be moving then may suddenly pop a bit. After the pop it had moved maybe a 16th of an inch then came off fairly easy. I did not use a strap to hold the pulley, I just used a wrench to hold the puller from scaring the supercharger housing as I was cranking on it. (I purchased a puller at NAPA auto $36 5ton)
•The paint on the stealth pulley softens up in the oven so be careful! I had it in there for maybe 10 mins at 280. The paint was sticky. Cooled and was fine but you could skuff the thing up good if you aren't cautious.
•The tool from URD worked great, I applied grease to all parts of the tool except the black Allen screw that screws to the tool & the charger. Screwed it in the tool 1/2 way as stated in the directions & wrenched away. Install the pulley when it's hot as stated in directions. It's a an effort to get the pulley all the way on but not a big deal just keep going till it stops & flush!

Installing my 255 fuel pump kit tomorrow.
Oh and yes the power increase is definitely noticeable!
Cheers

bluezzy · Dec 16, 2016

motozack said: ↑

I installed my 2.85 "stealth" pulley today on my recently purchased magnuson.
Pretty easy.
This is a great write up. Just a couple side notes from my experience.
Worked on it in the morning when truck was cold.
•I was able to access the belt tensioner fairly easy by using a 1/2 drive ratchet and reaching my left arm down between the wiper fluid & the radiator shroud. THEN UNDER THE FAN. Was able to free tension with my left hand while at the same time freeing the belt from the S/C pulley with my right hand. (Saved some time vs removing skid plate and crawling underneath)
•when removing original pulley with the puller, the pulley will appear not to be moving then may suddenly pop a bit. After the pop it had moved maybe a 16th of an inch then came off fairly easy. I did not use a strap to hold the pulley, I just used a wrench to hold the puller from scaring the supercharger housing as I was cranking on it. (I purchased a puller at NAPA auto $36 5ton)
•The paint on the stealth pulley softens up in the oven so be careful! I had it in there for maybe 10 mins at 280. The paint was sticky. Cooled and was fine but you could skuff the thing up good if you aren't cautious.
•The tool from URD worked great, I applied grease to all parts of the tool except the black Allen screw that screws to the tool & the charger. Screwed it in the tool 1/2 way as stated in the directions & wrenched away. Install the pulley when it's hot as stated in directions. It's a an effort to get the pulley all the way on but not a big deal just keep going till it stops & flush!

Installing my 255 fuel pump kit tomorrow.
Oh and yes the power increase is definitely noticeable!
Cheers
Click to expand...

mpg's has gone down a bit, I think mostly cuz I cant keep my damn foot out of it!!

Hot Tacoma Blown · Dec 17, 2016

The little pedal on the right feels A Bit Bigger!Good job was a pain putting the pulley on but worked just like urd said.Did you change your exhaust gears too?

bluezzy · Dec 17, 2016

Hot Tacoma Blown said: ↑

The little pedal on the right feels A Bit Bigger!Good job was a pain putting the pulley on but worked just like urd said.Did you change your exhaust gears too?
Click to expand...

I cheated, I dont have a place to do this kind of work so I took mine down to the speed shop and had them do it, total price, parts and labor was $214

FinnJ · May 21, 2017

crashnburn80[OP] initial post: ↑

Step 7
Installing the pulley is not an easy task. Lube the SC shaft with conventional motor oil as instructed in the URD instructions. It is a good idea to practice the install execution with your friend using the factory pulley as you will only get one shot at the install. Using heat protective gloves remove the pulley from the oven, place in position, place strap wrench over pulley, and insert install tool. You can place a wrench over the end of the pulley installer and lock it against the battery if you have a wrench long enough, reducing one job needed on the install. Then have one person hold the strap wrench on the pulley while the other person cranks on the nut with an open ended wrench as quickly as possible. Do. Not. Stop. It will be moderately easy at first then increase in difficulty as the shaft heats up and the pulley cools off till it is permanently mounted. It is extremely critical that you get it all the way on before this happens.
Click to expand...

Have anyone used Freeze Spray to the shaft? Should help a lot to freeze it properly. But is there any concerns?

VolcomTacoma · May 21, 2017

I wouldn't bother honestly. Warming the pulley is more than enough. If you do it quickly enough it should slide right in with no issues

motozack · May 21, 2017

Yeah it's pretty basic
Just get it done with quickness

FinnJ · Jun 30, 2017

FinnJ said: ↑

Have anyone used Freeze Spray to the shaft? Should help a lot to freeze it properly. But is there any concerns?
Click to expand...

Tried and managed to install it. I boiled the pulley first and freezed the shaft. Went easily first 2/3, until stopped completely like it's all there. Started to remove the tool, but noticed it wasn't! Hurry to turn it more, luckily it went quite easily, just needed more torque.

The paint of the pulley is very soft after boiling, there is now "stamp" of the washer and the original glossy paint is now something stealth too, looks old.

Torspd · Jun 30, 2017

Encountered the same issue with the paint, while helping a friend install his pulley.

Log in or Sign up

Welcome to Tacoma World!

URD 2.85 stealth supercharger pulley install

#101
bluezzy Love My SuperCharged 07 Sport!

#102
VolcomTacoma Well-Known Member

#103
VolcomTacoma Well-Known Member

#104
bluezzy Love My SuperCharged 07 Sport!

#105
Hot Tacoma Blown Well-Known Member

#106
bluezzy Love My SuperCharged 07 Sport!

#107
crashnburn80 [OP] Vehicle Design Engineer

#108
bluezzy Love My SuperCharged 07 Sport!

#109
Torspd Tor-nication

#110
Hot Tacoma Blown Well-Known Member

#111
Hot Tacoma Blown Well-Known Member

#112
motozack Well-Known Member

#113
bluezzy Love My SuperCharged 07 Sport!

#114
Hot Tacoma Blown Well-Known Member

#115
bluezzy Love My SuperCharged 07 Sport!

#116
FinnJ Well-Known Member

#117
VolcomTacoma Well-Known Member

#118
motozack Well-Known Member

#119
FinnJ Well-Known Member

#120
Torspd Tor-nication

Products Discussed in

Log in or Sign up

Useful Searches

Welcome to Tacoma World!

URD 2.85 stealth supercharger pulley install

#101 bluezzy Love My SuperCharged 07 Sport!

#102 VolcomTacoma Well-Known Member

#103 VolcomTacoma Well-Known Member

#104 bluezzy Love My SuperCharged 07 Sport!

#105 Hot Tacoma Blown Well-Known Member

#106 bluezzy Love My SuperCharged 07 Sport!

#107 crashnburn80 [OP] Vehicle Design Engineer

#108 bluezzy Love My SuperCharged 07 Sport!

#109 Torspd Tor-nication

#110 Hot Tacoma Blown Well-Known Member

#111 Hot Tacoma Blown Well-Known Member

#112 motozack Well-Known Member

#113 bluezzy Love My SuperCharged 07 Sport!

#114 Hot Tacoma Blown Well-Known Member

#115 bluezzy Love My SuperCharged 07 Sport!

#116 FinnJ Well-Known Member

#117 VolcomTacoma Well-Known Member

#118 motozack Well-Known Member

#119 FinnJ Well-Known Member

#120 Torspd Tor-nication

Products Discussed in Entire Site Forum: 2nd Gen. Tacomas (2005-2015)

#101
bluezzy Love My SuperCharged 07 Sport!

#102
VolcomTacoma Well-Known Member

#103
VolcomTacoma Well-Known Member

#104
bluezzy Love My SuperCharged 07 Sport!

#105
Hot Tacoma Blown Well-Known Member

#106
bluezzy Love My SuperCharged 07 Sport!

#107
crashnburn80 [OP] Vehicle Design Engineer

#108
bluezzy Love My SuperCharged 07 Sport!

#109
Torspd Tor-nication

#110
Hot Tacoma Blown Well-Known Member

#111
Hot Tacoma Blown Well-Known Member

#112
motozack Well-Known Member

#113
bluezzy Love My SuperCharged 07 Sport!

#114
Hot Tacoma Blown Well-Known Member

#115
bluezzy Love My SuperCharged 07 Sport!

#116
FinnJ Well-Known Member

#117
VolcomTacoma Well-Known Member

#118
motozack Well-Known Member

#119
FinnJ Well-Known Member

#120
Torspd Tor-nication

Products Discussed in