I have the 180mm ASP Pulley - Question on Tune

Aug 2, 2010 | 05:35 PM

alextaylor29

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From: Queen Creek AZ

2004 E55 AMG

I have the 180mm ASP Pulley - Question on Tune

All,

Quick question as Pulley's seem to be the topic of the day, I have the ASP 180mm pulley with me now, but not installed.

Currently I have the Let Stage 1 tune on my car and am happy with it. While Jerry will retune my car at no cost with the 180mm pulley installed I'm a bit impatient.

If I installed the 180mm pulley on but left my existing Stage 1 tune on now (so no re-tune), would I experience any issues? Let's tuning laptop is stuck in Italy so it may be a few weeks before I can get it.

Any advice here would be greatly appreciated, just don't want to damage my engine

by putting on the 180mm pulley.

Thanks for allowing me to ask such a basic/silly question!

Alex

Aug 2, 2010 | 05:51 PM

shardul

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From: Houston

2003 W211 E55, 2003 W220 S600

you can drive the car with the 180 on it. just dont get on it too much becasue a larger pulley will lean out the AFR

Aug 2, 2010 | 06:06 PM

alextaylor29

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MBWorld Fanatic!

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From: Queen Creek AZ

2004 E55 AMG

Thanks Shardul, stupid question but I don't quite understand what AFR is?

Thanks again.

AFR = Air Fuel Ratio? (Hey I went to college)

Alex

Last edited by alextaylor29; Aug 2, 2010 at 06:17 PM.

Aug 2, 2010 | 07:45 PM

shardul

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From: Houston

2003 W211 E55, 2003 W220 S600

lol yes AFR is air fuel ratio.

Bigger pulley = more air in the AF ratio = which tends to lead to a lean condition

Aug 2, 2010 | 07:51 PM

Roverron

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Joined: Dec 2009

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From: New Cumberland, PA

ML63

Well I think I will have an answer for you shortly. I will be changing tuners so I can tell you who is better for a 180 between at least two tuners. I will data log both before changing over and I will give you pure data and feed back.