dinko

How would you rate your Underdrive pulleys so far? I'm waiting patiently for mine to ship, and was wondering if any of you had any problems?

Dinko

Bux

my engine broke after having them on for 50miles .....now my warranty is trashed.....just kidding!

dinko

You had me for a sec!

Any positive feedback on them?

Dinko

more151please

i have it on my car, i like it, slight improvement, probably better if i got the ECU too. I had the powerchip on my car for a bit, but thought it wasn't worth the money at the time, but nowadays, im leaning on trying it again.

dinko

I have the Kleemann ECU, will it adapt with the UD's or will I have to re-flash the ECU again?

Thanks

rockgt302

Nope, pulleys dont change the engines operating parameters. They "restore" some HP from parasitic drain from accessories such as the water pump, power steering, and so on. On forced induction they change the level of boost, hence the term overdrive pulley. In our N/A case they underdrive.

dinko

Thanks for clearing it up for me. Can't wait to get them on!

Dinko

derrick_lui

I am hving trouble installing the underdrive pulley kit
Couldnt seem to remove the Stock Power Steering Pulley from the car.......
Anyone ran into this problem?

PTE

Go to CLK 5.5 AMG , go down about 20 lines . look for Evo sperts Help me Jlee81 . go to last entry __under PTE. Be there , done it Know what you are going through. This will help https://mbworld.org/forums/clk55-amg-clk63-amg-w208-w209/84134-evosport-help-me.html

PTE

under drive pulley set,Install

--------------------------------------------------------------------------------

Just for Grins , I installed a set of these pulleys on my 03 CLK 5.5 AMG. I did check the Quality of the workmanship ,, So I put them on the Lathe and found them to be very straight , no wiggle. Precision made and too within .0005 And Thats Excellent!
The installation was pretty straight forward , A little bit of a pain ,because I left the alternator mounted to the engine and No removal of assys.. The alternator pulley nut was on TIGHT!! It took a strap wrench and a 24"breaker bar too get it loose . Once that was done , the pulley slid right off the stator winding shaft. The water pump pulley is a no brainer!!. The Power steering pump pulley , removal & install is touchy??

To do this part of the JOB right , you will need a K-D Tools , Pulley remover/ installer Set. Part Number
K-D 2897 . I brought mine at the local NAPA store . Expect to pay about $83.00 Or Borrow one. This kit works the best.I looked at several types & Manufacture of R & R Kits Snap-On , Mac . The K-D fits better and will not damage the OEM or the EVO pulley. Sometimes the auto parts stores have a loaner / rental tool program.
This part must be done Right!! Remember it is a poly vee / serpentine type belt and must have perfect pulley alignment. Or you will throw the belt on short order.
The job took about 3 hours, a beer break .and 2 scraped knuckles. Can be done on any Saturday afternoon

I then dynoed the car. I picked up about 8 hp in the mid range , but only 2 hp above 5000 rpm Was it worth it YES!! I will take the increase. A Hp here , a HP there adds up at the day. It's tough to measure the rate of acceration on the Dyno. I just had to remember that this motor does not always respond with BIG inprovements , like the claims made for American built engines. You can race DYNO' all day long, But the history is made at the track
Attached Images

JamE55

dinko,

Who's under drive pulleys did you get? Kleemann? Or who?

Clk&Slk

[QUOTE=JamE55]The K-D fits better and will not damage the OEM or the EVO pulley.QUOTE]


James, read the quote again, please !!

JamE55

Thanks Linh! Missed the heading....

toogoodc55

how much are the evo pullies and does that void the warranty