62mm Pulley
06-06-2012, 10:36 PM
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04 Crossfire MB 5.0L M113 V8 6spd, 05 Bagged SRT6w/55K AMG V8 ,2016 C300 Sport
06-06-2012, 11:50 PM
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06-07-2012, 07:50 AM
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04 Crossfire MB 5.0L M113 V8 6spd, 05 Bagged SRT6w/55K AMG V8 ,2016 C300 Sport
Yea, it is alot of money, I just didnt know if anyone around may have helped with testing (if they did any) !
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06-08-2012, 02:16 PM
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08-15-2012, 11:46 AM
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There is a group buy on the this 62mm pulley that closes on Friday 8-17-12. One or 2 more sign up and the price will be $650. (I'm on the list to get one myself : )
There is a lot of info on this pulley in the group buy thread and another thread both on the crossfire forum.
http://www.crossfireforum.org/forum/...lable-now.html
moderators, if linking to info in this other thread on another site is not appropriate, I apologize (and there will be no hard feelings if you need to edit or remove this post)
Chris
There is a lot of info on this pulley in the group buy thread and another thread both on the crossfire forum.
http://www.crossfireforum.org/forum/...lable-now.html
moderators, if linking to info in this other thread on another site is not appropriate, I apologize (and there will be no hard feelings if you need to edit or remove this post)
Chris
08-21-2012, 06:02 PM
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08-21-2012, 08:12 PM
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I didn't save any of my datalogs from before when I had a C3 pulley, but there's some really good info here if you're interested in this pulley:
http://www.crossfireforum.org/forum/crossfire-srt6/57384-62mm-srt6-pulley-available-now.html
http://www.crossfireforum.org/forum/crossfire-srt6/57384-62mm-srt6-pulley-available-now.html
08-21-2012, 10:40 PM
#13
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in that link the poster mentioned that the NW PSK allows the use of the 62mm without slippage issues. i don't understand how that would help at all. doesn't the PSK fix the issue of over-driving the other components with a bigger crank pulley? the product description of the PSK on NW's site advertises how every feature of the kit 'frees up additional belt length' whereas with a smaller SC pulley, we want the exact opposite
it would seem more logical to just get a shorter belt
it would seem more logical to just get a shorter belt
08-22-2012, 02:31 AM
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in that link the poster mentioned that the NW PSK allows the use of the 62mm without slippage issues. i don't understand how that would help at all. doesn't the PSK fix the issue of over-driving the other components with a bigger crank pulley? the product description of the PSK on NW's site advertises how every feature of the kit 'frees up additional belt length' whereas with a smaller SC pulley, we want the exact opposite
it would seem more logical to just get a shorter belt
it would seem more logical to just get a shorter belt
08-22-2012, 11:11 AM
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C63 AMG, P30
But this is what I don't understand...
According to EC's website a 181+tune yields 395 HP, a 185+tune yields 407 HP, a SC pulley+tune yields 407 HP but less TQ than a 185. So, how is it that a smaller SC pulley (62mm) yields less HP than a 185? When technically the EC SC pulley HP = 185 pulley HP. I'm just confused as it doesn't seem to add up.
According to EC's website a 181+tune yields 395 HP, a 185+tune yields 407 HP, a SC pulley+tune yields 407 HP but less TQ than a 185. So, how is it that a smaller SC pulley (62mm) yields less HP than a 185? When technically the EC SC pulley HP = 185 pulley HP. I'm just confused as it doesn't seem to add up.
08-23-2012, 03:44 AM
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But this is what I don't understand...
According to EC's website a 181+tune yields 395 HP, a 185+tune yields 407 HP, a SC pulley+tune yields 407 HP but less TQ than a 185. So, how is it that a smaller SC pulley (62mm) yields less HP than a 185? When technically the EC SC pulley HP = 185 pulley HP. I'm just confused as it doesn't seem to add up.
According to EC's website a 181+tune yields 395 HP, a 185+tune yields 407 HP, a SC pulley+tune yields 407 HP but less TQ than a 185. So, how is it that a smaller SC pulley (62mm) yields less HP than a 185? When technically the EC SC pulley HP = 185 pulley HP. I'm just confused as it doesn't seem to add up.
The 62mm pulley should run about 22psi so it should be at least as powerful as the 185 and should produce more power than the 64mm SC pulley or whatever size it is. The only way to get a realistic comparison is the same car, same mods, same dyno, same everything except pulley.... probably not going to happen.
08-23-2012, 04:22 AM
#20
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But this is what I don't understand...
According to EC's website a 181+tune yields 395 HP, a 185+tune yields 407 HP, a SC pulley+tune yields 407 HP but less TQ than a 185. So, how is it that a smaller SC pulley (62mm) yields less HP than a 185? When technically the EC SC pulley HP = 185 pulley HP. I'm just confused as it doesn't seem to add up.
According to EC's website a 181+tune yields 395 HP, a 185+tune yields 407 HP, a SC pulley+tune yields 407 HP but less TQ than a 185. So, how is it that a smaller SC pulley (62mm) yields less HP than a 185? When technically the EC SC pulley HP = 185 pulley HP. I'm just confused as it doesn't seem to add up.
With that in mind, consider this formula:
(peak torque)*(peak torque RPM)/5252 = horsepower
If Car A makes 200 ft-lbs torque at 5000RPM and Car B makes 200 ft-lbs torque at 6500RPM, Car B will make more horsepower. Car B would produce 247.5 horsepower while Car A would only produce 190.4 horsepower.
The torque line is the most important on a dyno graph because it shows how the motor's 'behavior' will change. The 185's peak torque of 401 arrives at an earlier RPM than the SC pulley, which lowers the horsepower figure. Despite this, the 185 makes significantly more torque in the mid-range so it will feel faster. After studying these two dyno graphs for a bit I found it interesting that the SC pulley makes more torque than the 185 below 2800RPM.
08-23-2012, 06:57 AM
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2003 porsche 996 turbo
apples to oranges. i have run the c3 s/c pulley renntech 178 crank pulley and both of them stacked.
the c3 or e/c pulley will max out at no more than 18 psi and a 185 will see 24 psi . no way a 65mm s/c pulley and a tune alone nets 400 rwhp.
the comparison runs something like this
oem =oem
c3=e/c pulley=178 with the 178 getting slightly more torque 18psi max
62mm s/c = 181 with crank pulley getting more torque. 21psi max
185 =185 great dyno pulley but heat kills it in real life racing 24psi max will result in overboost code at times
i see the best advantage of the s/c pulley is theres no parasitic loss of power or overdriving of the accessories.
the c3 or e/c pulley will max out at no more than 18 psi and a 185 will see 24 psi . no way a 65mm s/c pulley and a tune alone nets 400 rwhp.
the comparison runs something like this
oem =oem
c3=e/c pulley=178 with the 178 getting slightly more torque 18psi max
62mm s/c = 181 with crank pulley getting more torque. 21psi max
185 =185 great dyno pulley but heat kills it in real life racing 24psi max will result in overboost code at times
i see the best advantage of the s/c pulley is theres no parasitic loss of power or overdriving of the accessories.
08-23-2012, 07:59 AM
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Porsche 2004 911
Torque is the clearest measure of power an engine produces as horsepower is a figure derived from torque itself. Simply put, horsepower is torque at a given engine speed.
With that in mind, consider this formula:
(peak torque)*(peak torque RPM)/5252 = horsepower
If Car A makes 200 ft-lbs torque at 5000RPM and Car B makes 200 ft-lbs torque at 6500RPM, Car B will make more horsepower. Car B would produce 247.5 horsepower while Car A would only produce 190.4 horsepower.
The torque line is the most important on a dyno graph because it shows how the motor's 'behavior' will change. The 185's peak torque of 401 arrives at an earlier RPM than the SC pulley, which lowers the horsepower figure. Despite this, the 185 makes significantly more torque in the mid-range so it will feel faster. After studying these two dyno graphs for a bit I found it interesting that the SC pulley makes more torque than the 185 below 2800RPM.
With that in mind, consider this formula:
(peak torque)*(peak torque RPM)/5252 = horsepower
If Car A makes 200 ft-lbs torque at 5000RPM and Car B makes 200 ft-lbs torque at 6500RPM, Car B will make more horsepower. Car B would produce 247.5 horsepower while Car A would only produce 190.4 horsepower.
The torque line is the most important on a dyno graph because it shows how the motor's 'behavior' will change. The 185's peak torque of 401 arrives at an earlier RPM than the SC pulley, which lowers the horsepower figure. Despite this, the 185 makes significantly more torque in the mid-range so it will feel faster. After studying these two dyno graphs for a bit I found it interesting that the SC pulley makes more torque than the 185 below 2800RPM.
08-23-2012, 01:10 PM
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2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
apples to oranges. i have run the c3 s/c pulley renntech 178 crank pulley and both of them stacked.
the c3 or e/c pulley will max out at no more than 18 psi and a 185 will see 24 psi . no way a 65mm s/c pulley and a tune alone nets 400 rwhp.
the comparison runs something like this
oem =oem
c3=e/c pulley=178 with the 178 getting slightly more torque 18psi max
62mm s/c = 181 with crank pulley getting more torque. 21psi max
185 =185 great dyno pulley but heat kills it in real life racing 24psi max will result in overboost code at times
i see the best advantage of the s/c pulley is theres no parasitic loss of power or overdriving of the accessories.
the c3 or e/c pulley will max out at no more than 18 psi and a 185 will see 24 psi . no way a 65mm s/c pulley and a tune alone nets 400 rwhp.
the comparison runs something like this
oem =oem
c3=e/c pulley=178 with the 178 getting slightly more torque 18psi max
62mm s/c = 181 with crank pulley getting more torque. 21psi max
185 =185 great dyno pulley but heat kills it in real life racing 24psi max will result in overboost code at times
i see the best advantage of the s/c pulley is theres no parasitic loss of power or overdriving of the accessories.
What is your thinking regarding the use of smaller pulley and overdriving the internals of the supercharger?
08-23-2012, 06:24 PM
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Crossfire SRT6 coupe/Crossfire SRT6 Roadster/MB E350 4 Matic
I am going to try 1 of these on my SRT6, so I am selling a 1st gen Code 3 pulley if there is interest. I have had great luck with the Code 3. But doing some more modding, data logging, so going to push it a bit. I have ran Code 3's on both my SRT's and have nothing but good things to say about them. But, time to try something new. If interested, just let me know. I have been offered $450.00 shipped, and that is my low $$$. The 62mm looks to be manufactured well, and has been tested I believe up to 10K miles. But it is pushing it...but that's what makes it interesting...lol...I few of you guys know me, but if you don't and need more info...come on over to the darkside...XF forum...lol
