Bought a 72mm pulley
#1
Bought a 72mm pulley
So I bought a 72mm on ebay it's a DTK clutched and received it. I am on stock pulley but I just put a bid on a PLM XL heat exchanger with cm30 johnson pump. Can my car run comfortable with just that cooling mod?
Is 72mm too aggressive will it risk damaging my engine? I do daily drive the car but like speed as we all do, I want it to at least be reliable. I have the pulley already just need to know what belt to buy.
Is 72mm too aggressive will it risk damaging my engine? I do daily drive the car but like speed as we all do, I want it to at least be reliable. I have the pulley already just need to know what belt to buy.
#6
post some photos or hydrodip interior, please, I almost did a CF interior wrap but didn’t think it flows with the E W211
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Duomax (03-06-2023)
#7
https://postimg.cc/67jcxkxr
It's by no means the greatest, I don't think it looks like real carbon fiber but I like it better than stock. First time doing it
It's by no means the greatest, I don't think it looks like real carbon fiber but I like it better than stock. First time doing it
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#8
https://postimg.cc/67jcxkxr
It's by no means the greatest, I don't think it looks like real carbon fiber but I like it better than stock. First time doing it
It's by no means the greatest, I don't think it looks like real carbon fiber but I like it better than stock. First time doing it
#9
I will gladly post pictures when it's installed but what I am worried about is if it doesn't really look the greatest. If I install the the center pieces and it doesn't look good I will just not continue it and wrap the interior or something. My interior is black/blue which is why I went that route
#10
I’m not an expert on these platforms by any means, but I’ll throw in my 2 cents anyway. 72 is a pretty aggressive size but with a stock crank pulley I think you should be okay. For cooling, I’m not sure. I think you should be good for daily driving, but after a couple WOT’s it will probably start pulling timing. If you ever want to go with a bigger crank pulley, there was a chart on here that listed boost pressure with different combinations of upper/lower pulley sizes and their corresponding “safety” levels so to speak. I would consult that if you ever are going to go with a different crank pulley because 72 is pretty small. Good luck, and if cooling becomes an issue I would probably go ***** to the wall and go with a killer chiller or meth injection just so you won’t have to worry about it again.
#11
So I bought a 72mm on ebay it's a DTK clutched and received it. I am on stock pulley but I just put a bid on a PLM XL heat exchanger with cm30 johnson pump. Can my car run comfortable with just that cooling mod?
Is 72mm too aggressive will it risk damaging my engine? I do daily drive the car but like speed as we all do, I want it to at least be reliable. I have the pulley already just need to know what belt to buy.
Is 72mm too aggressive will it risk damaging my engine? I do daily drive the car but like speed as we all do, I want it to at least be reliable. I have the pulley already just need to know what belt to buy.
Last edited by Das_it16; 03-26-2019 at 02:13 PM.
#12
Senior Member
Joined: Sep 2015
Posts: 367
Likes: 36
From: Dawesville, West Australia
2006 E55, 2006 SL55, 2006 LS7 Ute
I had a 74mm fixed pulley made for my SL55 with all the other non-internal mods one can do (stage 2 EC kit), stock SC, only shorty headers, KC and tank, stock fuel system, Pierburg 50 IC pump. I had seen information that that is the smallest size pulley before boost no longer improves, just heat increases. In any event Tony Lawshee sent me a tune and I am very pleased with the result. I live too far from the drag strip to get 1/4 mile times however I do have a V-box which I use to time 100-200 kph which I then compare to that interval in road tests of other cars. It is a low 11sec maybe high 10 sec car based on those comparisons. I have an AFR gauge which showed 11.8:1, no leaner. I can't see the need to do more as the $'s needed to go quicker are exponential and unless drag racing is your sport, not needed.
As an aside I also have an in cabin temp read out of the water in my tank which receives it direct from the KC. I highly recommend that guage for KC users as you quickly see the heat loads and recovery of that water temp. The water is always still under ambient temp after those 100-200 pulls and gets down to 15 deg C below ambient while cruising, so much much colder than any heat exchanger provide which is probably 5 deg C above ambient best. I have the 'drag valve' which when full on to the KC I get another 5 deg colder. The hotter the ambient temp the bigger the temp drop I see. IMO a KC is a no brainer. Sorry this last paragraph is a thread hi-jack.
As an aside I also have an in cabin temp read out of the water in my tank which receives it direct from the KC. I highly recommend that guage for KC users as you quickly see the heat loads and recovery of that water temp. The water is always still under ambient temp after those 100-200 pulls and gets down to 15 deg C below ambient while cruising, so much much colder than any heat exchanger provide which is probably 5 deg C above ambient best. I have the 'drag valve' which when full on to the KC I get another 5 deg colder. The hotter the ambient temp the bigger the temp drop I see. IMO a KC is a no brainer. Sorry this last paragraph is a thread hi-jack.
Last edited by trabots; 03-25-2019 at 12:59 PM.
#14
If you don't have upgraded cooling it is aggressive or if you are a Mercedes owner. A better pump and intercooler you're good to go. I ran a 74mm without a tune for months. If you're at higher altitude it's just getting you to what someone at sea level has with a 83mm. I don't think I ever saw something about a dtk pulley failing? Mb you could link a thread, I'm not a slave to the forum.
#15
If you don't have upgraded cooling it is aggressive or if you are a Mercedes owner. A better pump and intercooler you're good to go. I ran a 74mm without a tune for months. If you're at higher altitude it's just getting you to what someone at sea level has with a 83mm. I don't think I ever saw something about a dtk pulley failing? Mb you could link a thread, I'm not a slave to the forum.
Here's one guy with a 74mm pulley with a failed bearing: https://mbworld.org/forums/w211-amg/...ed-pulley.html
#16
My friend that's local to me had a 70mm pulley from him and the bearing failed. He had it for less than a year with a couple thousand miles. It's mostly discussed in the Facebook AMG groups. You can find multiple reviews in there. I don't know if there are many threads on it on MBWorld. The FB groups are a lot more active now unfortunately.
Here's one guy with a 74mm pulley with a failed bearing: https://mbworld.org/forums/w211-amg/...ed-pulley.html
Here's one guy with a 74mm pulley with a failed bearing: https://mbworld.org/forums/w211-amg/...ed-pulley.html
#17
Had one sitting in my parts department.
The bearing is a 6809z it's a shielded bearing so it can keep things of sorts out, but it also allows all the grease out when it's spinning 15000 Rpms. There is 4 of these bearings in there with a spacer in the middle because 5 wouldn't fit but there was space to spare.
The bearing is a 6809z it's a shielded bearing so it can keep things of sorts out, but it also allows all the grease out when it's spinning 15000 Rpms. There is 4 of these bearings in there with a spacer in the middle because 5 wouldn't fit but there was space to spare.
#19
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,369
Likes: 180
From: America
1999 C43 AMG, 2005 E55 Wagon
I bought my car with 138k miles and a 72mm clutched pulley with headers and basic cooling mods.
I've beat on it every day for 5 years and I'm close to 193k miles now. It's totally fine.
I've beat on it every day for 5 years and I'm close to 193k miles now. It's totally fine.
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SLOW55 (04-22-2023)
#21
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,369
Likes: 180
From: America
1999 C43 AMG, 2005 E55 Wagon
#22
MBWorld Fanatic!
Joined: May 2022
Posts: 1,883
Likes: 478
From: The Netherlands
2005 CLS55 AMG W219 C219
The best belt should be the Gates RPM series
More pics here: https://mbworld.org/forums/c219/8443...ml#post8653485
More pics here: https://mbworld.org/forums/c219/8443...ml#post8653485
#23
#24
So I bought a 72mm on ebay it's a DTK clutched and received it. I am on stock pulley but I just put a bid on a PLM XL heat exchanger with cm30 johnson pump. Can my car run comfortable with just that cooling mod?
Is 72mm too aggressive will it risk damaging my engine? I do daily drive the car but like speed as we all do, I want it to at least be reliable. I have the pulley already just need to know what belt to buy.
Is 72mm too aggressive will it risk damaging my engine? I do daily drive the car but like speed as we all do, I want it to at least be reliable. I have the pulley already just need to know what belt to buy.
#25
My first experience was a 77mm pulley from DTK, the bearings failed, twice. Then I bought a 74mm pulley, bearings failed and then a 72mm pulley, the bearings failed much faster, I replaced them with better quality SKF bearings but they lasted only a year. I'm now thinking of going with a fixed pulley after installing an interchiller. The grease in the pulleys just can't seem to stay in place.