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SC Pulley upgrade Questions

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Old 04-21-2010, 09:17 PM
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SC Pulley upgrade Questions

Hi guys,

I want to upgrade the crank pulley to increase the boost on my m111 engine.

After researching i found that after fitting the pulley and after a fdew runs the ecu's self learn function recognises that more psi is fed through and limits the exess boost or releases it through the bypass valve.

Is this true?

If i get the pulley will it increase any power without a remap?

Thanks.
Old 04-22-2010, 12:35 PM
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2004 C230k sold, 2008 Hummer H3, 1959 544 Coupe, 2007 SLK 280
I have actually been looking at doing the same thing to my 230k, and a friend at pep boys said that the safest way to upgrade the pully without setting off any of the cars ridiculous sensors would be to only increase the boost by about 4 to 8 pounds, which should he said, be a noticable increase. Haven't tried it yet, but he works on cars pretty regularly. Sadly, most of the people I race with don't run German cars... They perfer the Japanese tuner scene. If you happen to try it, please give us an update, it would be much appreciated!
Old 04-22-2010, 03:53 PM
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i would also like to change my pullys on my c230k please respond back if you get something going thanks.
Old 04-22-2010, 05:43 PM
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Originally Posted by benzc200k
Hi guys,

I want to upgrade the crank pulley to increase the boost on my m111 engine.

After researching i found that after fitting the pulley and after a fdew runs the ecu's self learn function recognises that more psi is fed through and limits the exess boost or releases it through the bypass valve.

Is this true?

If i get the pulley will it increase any power without a remap?

Thanks.
it should be... but it will be better if you remap

Originally Posted by 230kDrew
I have actually been looking at doing the same thing to my 230k, and a friend at pep boys said that the safest way to upgrade the pully without setting off any of the cars ridiculous sensors would be to only increase the boost by about 4 to 8 pounds, which should he said, be a noticable increase. Haven't tried it yet, but he works on cars pretty regularly. Sadly, most of the people I race with don't run German cars... They perfer the Japanese tuner scene. If you happen to try it, please give us an update, it would be much appreciated!
careful if they do not know about germans car... anyway yours is a m271 engine not a m111
Old 04-22-2010, 07:34 PM
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Yeah it looks like ASP racing have them.


I was just reading on another thread the other day that once you hit the higher boost in a higher RPM the cars ecu dumps the exxess boost through the Bypass valve, if thats the case then theres no point in doing the mod?


http://www.aspracing.com/import.htm
Old 04-22-2010, 08:59 PM
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if you are happy already with the power than its fine... be like me... do only appearance mods...
Old 04-22-2010, 09:57 PM
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Originally Posted by XsuperbeeX
if you are happy already with the power than its fine... be like me... do only appearance mods...
Hrmmm, i came from a modded 2002 SUbaru wrx so it is kinda low on power, but i cant compare the two. Just wanted a little extra power.

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