Those with the smaller upper blower pulley..
09-13-2013, 09:03 AM
#1
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'05 E55, '12 C63
Those with the smaller upper blower pulley..
I read some threads but wanted some more insight.
For those with the SC pulley:
1) How are the power gains? Are they immediately noticeable? After a tune, better?
2) Are the newer EC versions safer than the previous versions that seemed to fail? What are the reason for failures? I read it was about shimming? The new ones don't require shimming at all?
3) Typically, how much boost is added with the smaller upper pulley? Also, is that belt wrap kit necessary with the smaller pulley? What benefits does the wrap kit provide other than preventing slip?
Thank you all in advance for any help/feedback...
For those with the SC pulley:
1) How are the power gains? Are they immediately noticeable? After a tune, better?
2) Are the newer EC versions safer than the previous versions that seemed to fail? What are the reason for failures? I read it was about shimming? The new ones don't require shimming at all?
3) Typically, how much boost is added with the smaller upper pulley? Also, is that belt wrap kit necessary with the smaller pulley? What benefits does the wrap kit provide other than preventing slip?
Thank you all in advance for any help/feedback...
09-13-2013, 09:13 AM
#2
MBWorld Fanatic!
https://mbworld.org/forums/e55-amg-w...13-motors.html
This can also provide a little more info on pulley sizing. The green 83mm pulley is the smaller s/c pulley.
1) Increases belt wrap of crank pulley and supercharger pulley to help eliminate the dreaded belt slip
2) Stops loss of boost from belt slip during peak loads and when clutch engages
3) Uses ASP idler pulley with high speed rated ZZ bearings.
4) Promotes longer lasting belt and less dust
5) Test have shown any where from .5 to 1.5psi of boost increase during peak loads
6) Easier to tune car with more consistent boost levels and less fluctuation during peak load
7) Easy to install and kit also braces the double idler pulley`s to eliminate them from flexing under load . This double idler flexing causes belt tension to decrease and more belt slip.
2) Stops loss of boost from belt slip during peak loads and when clutch engages
3) Uses ASP idler pulley with high speed rated ZZ bearings.
4) Promotes longer lasting belt and less dust
5) Test have shown any where from .5 to 1.5psi of boost increase during peak loads
6) Easier to tune car with more consistent boost levels and less fluctuation during peak load
7) Easy to install and kit also braces the double idler pulley`s to eliminate them from flexing under load . This double idler flexing causes belt tension to decrease and more belt slip.
Last edited by HeissRod; 09-13-2013 at 09:45 AM.
09-13-2013, 09:26 AM
#3
I think the sc pulley adds maybe ~1-2psi. With a BWK, I would think gains should be 20-25rw, maybe? Likely varies from car to car and how modded the car is. I'd say for a stock car, that's likely what the gains are. The power should be much more smoother and wider across the RPM range.
From what I understand, the reason for failures were due to incorrect shimming and the pulley coming apart under heavy load. That's why measuring is key along with the install. Just find the right person that knows what they are doing and you'll be fine.
HeissRod answered the other question.
As far as impressions, I'll know Sunday afternoon after the EC open house
From what I understand, the reason for failures were due to incorrect shimming and the pulley coming apart under heavy load. That's why measuring is key along with the install. Just find the right person that knows what they are doing and you'll be fine.
HeissRod answered the other question.
As far as impressions, I'll know Sunday afternoon after the EC open house
Last edited by ArmoE55; 09-13-2013 at 09:28 AM.
09-13-2013, 10:27 AM
#4
https://mbworld.org/forums/e55-amg-w...13-motors.html
This can also provide a little more info on pulley sizing. The green 83mm pulley is the smaller s/c pulley.
This can also provide a little more info on pulley sizing. The green 83mm pulley is the smaller s/c pulley.
09-13-2013, 10:37 AM
#5
dude you need to start searching before u make these redundant threads. since your lazy here
https://mbworld.org/forums/w211-amg/...nly-added.html
https://mbworld.org/forums/w211-amg/...sc-pulley.html
https://mbworld.org/forums/w211-amg/...nly-added.html
https://mbworld.org/forums/w211-amg/...sc-pulley.html
09-13-2013, 11:02 AM
#6
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09-13-2013, 02:07 PM
#10
Member
Before buying my pulley from shardul I asked and he wrote that there are multiple upper pulley sizes available. Maybe shardul can chime in here about the different options.
09-13-2013, 02:10 PM
#11
ya if u are getting a FIXED upper pulley with no clutch then their are different sizes but with the clutch no their is only one size 84mm
09-13-2013, 02:28 PM
#12
Member
That's right, I had ignored that part. So is it accurate to say the clutched upper pulley is approximately similar to going from stock 154mm to 168mm crank pulley?
09-13-2013, 02:32 PM
#13
09-13-2013, 02:39 PM
#14
no incorrect, I already dynod adding this pulley. you def dont gain the same power as a 168mm crank pulley. like I said before u will gain power but not what everyone hypes it up to be. read results.
Dyno with SC pulley only added
Dyno with SC pulley only added
Last edited by AMG E Power; 09-13-2013 at 02:42 PM.
09-13-2013, 02:41 PM
#15
I said IF YOU ARE TALKING PULLEY RATIO, then yes, you'd be correct. A stock lower and SC pulley have roughly the same pulley ratio as a 168 lower and stock upper.
09-13-2013, 02:45 PM
#16
u are wrong again ! do u even have the pulley ? If u did u can measure it is 84mm not 82-83mm which would be the correct ratio to a 168
09-13-2013, 02:46 PM
#17
