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Supercharger: Crank vs top?

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Old 11-18-2014, 03:30 PM
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Default Supercharger: Crank vs top?

Hi all,

I've read a bit about SC pulley sizes, materials, failures etc... I am wondering if there is an advantage over a crank pulley (bigger) vs SC pulley (smaller). Are people doing the SC pulley for rotational weight savings or cost? Was the EC crank pulley any good or were there failures like the upper one?

Thanks!
 
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Old 11-18-2014, 07:09 PM
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Default Re: Supercharger: Crank vs top?

Yes.....to all those questions..... there is an advantage to a crank over a pulley on HP, but very little and you spin the other pulleys faster as well unless you do a kit re-sizing the other pulleys as well. Yes there is a saving on weight but very little. Advantage is you don't spin the other pulleys faster. Cost is about the same. EC had failures early on with the pulleys....
 
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Old 11-18-2014, 07:39 PM
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Default Re: Supercharger: Crank vs top?

Originally Posted by oledoc2u
Yes.....to all those questions..... there is an advantage to a crank over a pulley on HP, but very little and you spin the other pulleys faster as well unless you do a kit re-sizing the other pulleys as well. Yes there is a saving on weight but very little. Advantage is you don't spin the other pulleys faster. Cost is about the same. EC had failures early on with the pulleys....
Thanks Doc!

The kit I am looking at has:
Eurocharged 181mm Crank Pulley
Water Pump Pulley
Idler Pulley with 19,000 RPM Bearing
OEM Crank Bolt

Cost aside would you go top end or bottom end? (all other supporting factors taken care of prior - IE CAI, AFR, Tune, etc...)

Thanks
 
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Old 11-18-2014, 10:42 PM
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Default Re: Supercharger: Crank vs top?

to match the 181 you would have to go to the 62mm or 61mm s/c pulley and do fuel upgrades, which you will have to do anyway with the 181...
 
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Old 11-18-2014, 10:47 PM
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Default Re: Supercharger: Crank vs top?

Originally Posted by oledoc2u
to match the 181 you would have to go to the 62mm or 61mm s/c pulley and do fuel upgrades, which you will have to do anyway with the 181...
Would you say with the current crop of EC upper pullies, there's no pro/con here?
The upper would be 65 vs 62 equivalent for the lower.

I guess I'm trying to figure out (boost level and cost aside) which is the better solution. If the new 65mm pullies don't grenade, it would be _easier_ to swap that.
 
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Old 11-19-2014, 12:45 PM
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Default Re: Supercharger: Crank vs top?

I think you and I are looking at the same kit. Better help my wallet out here and pull the trigger before I do.
 
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Old 11-19-2014, 12:46 PM
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Default Re: Supercharger: Crank vs top?

Originally Posted by SparkieSRT6
I think you and I are looking at the same kit. Better help my wallet out here and pull the trigger before I do.
Haha, any luck find any more engine plates?
 
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Old 11-19-2014, 12:48 PM
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Default Re: Supercharger: Crank vs top?

No...not looking good.
 
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