E55 Pulley decesion

[ChrisE55]

I’m interested in your pulley/tune combo. I have an 06 E55 with the following:

* PLM XL heat exchanger

*Bosch 010 pump

*Belt wrap kit - 5 pulley upgrade

*New OEM tank and OEM fuel pumps (Recall)

TCU program



Car is basically stock.



I am interested in the 77mm or 84 mm. Can I run a 77 mm with stock exhaust or better to go with the 84mm? Do I have adequate cooling with my mods? Don’t want to grenade anything.
I'm in the states and I get differing opinions and I found this forum with my overseas bretheren. FYI: I lived in Farnborough back in the day. (Father was a US Navy Test Pilot).

Thanks!
Chris

 

[Cyclone1]

Hi,as you already have an upgraded HE you are part the way there. I ran a 77mm with no additional cooling and in the British climate it was fine. If I was doing repeated high speed runs then there is no question that the excessive heat generate would have meant power loss. Additional cooling almost guarantees the extra power and torque you gain from the pulley, to be there all the time. If I had a 55k again I would definitely install additional cooling.

Have a read of my thread below as there is some great info from
Owners.

On top of your HE you could add one of the following;

Split Cooling (£200-£800 depending on whether you go additional reservoir or bespoke tank)

Killer Chiller (circa £1k)

Meth (circa £800-£1k)

77mm Supercharger Pulley - MSL Dyno Test | AMG Lounge

Hi All, As some of you may be aware there is a new 77mm Supercharger pulley (twin bearing) available from MSL and manufactured via UPD. It offers the ability to match the power / torque figures of the tried and tested 180mm crank pulley and as such, potentially offers owners a new pulley to...

forums.mbclub.co.uk

Hope this helps
Jules

 

[ChrisE55]

Hi,as you already have an upgraded HE you are part the way there. I ran a 77mm with no additional cooling and in the British climate it was fine. If I was doing repeated high speed runs then there is no question that the excessive heat generate would have meant power loss. Additional cooling almost guarantees the extra power and torque you gain from the pulley, to be there all the time. If I had a 55k again I would definitely install additional cooling.

Have a read of my thread below as there is some great info from
Owners.

On top of your HE you could add one of the following;

Split Cooling (£200-£800 depending on whether you go additional reservoir or bespoke tank)

Killer Chiller (circa £1k)

Meth (circa £800-£1k)

77mm Supercharger Pulley - MSL Dyno Test | AMG Lounge

Hi All, As some of you may be aware there is a new 77mm Supercharger pulley (twin bearing) available from MSL and manufactured via UPD. It offers the ability to match the power / torque figures of the tried and tested 180mm crank pulley and as such, potentially offers owners a new pulley to...

forums.mbclub.co.uk

Hope this helps
Jules

Hi Jules,
Thank you for the info. The difference in torque between the 83 and 77 is sizeable. That difference is why I want the 77mm. With the 77 mm I have been told the injectors should be replaced with 550's as the stock injectors are questionable.

 

[ChrisE55]

I can't correct " decision" in the OP as I don't have enough posts.

 

[ALFAitalia]

You can't correct any post on, regardless of post count, here after a few minutes....slightly annoying tbh....