SL55/63/65/R230 AMG: SL55 ECU Tuning
Senior Member
Joined: Aug 2014
Posts: 283
Likes: 40
From: SoCal - OC
2004 CL55, 2003 SL55, 2017 S63 Cabrio and 2009 G55
I put 180mm UDP harmonic balancer with RaceIQ, colder plugs, 550cc injectors, 82mm TB with headers and running great. The crankshaft pulley feels better down low for TQ.
Senior Member
Joined: May 2019
Posts: 280
Likes: 37
From: Lincolnshire, IL
2005 SL55 AMG
A couple of months ago, I did an 83mm UPD S/C pulley, RaceIQ Stage 2 tune and upgraded to the Bosch 010 auxiliary water pump. For @ $800, those mods are plenty to keep me scared.
Last edited by poppyboy; Oct 11, 2020 at 10:49 PM. Reason: typo
Member
Joined: Aug 2018
Posts: 147
Likes: 21
From: SF Bay Area
SL55 AMG, Audi S6 V8TT, Audi Q7 3.0 SC
I have RaceIQ ECU tune (i flashed the car myself at home), 77mm clutched pulley, RaceIQ TCU tune (had to ship them the TCU), new & improved Bosch 010 pump, larger injectors, colder plugs .... and I am very happy with the results. Very noticeable improvement over stock.
Working with RaceIQ has been a real pleasure.
In the process of installing an additional heat exchanger from PLM and splitting the cooling system.
Working with RaceIQ has been a real pleasure.
In the process of installing an additional heat exchanger from PLM and splitting the cooling system.
Super Member
Joined: Dec 2011
Posts: 531
Likes: 88
From: EDH, CA.
2012 E63 AMG
Just for a comparison to better understand what 30-50 HP will do for a 500 HP motor.
I previously had a 4 cylinder Turbo Ford motor that I stroked with all billet parts. It put out over 400 WHP and 500 WTQ. I then added a 50 HP shot of nitrous. I could hardly feel it. Had to bump it up to a 100 shot before it was really even noticeable.
My opinion in adding 50 HP to a SL55 is that you will hardly feel it. Doesn't make a whole bunch of seat-of-the-pants difference. There may be other things you gain with a tune like efficiency, response, and a few other things - but for power, your gonna have to add over 100 HP to make any real difference noticeable.
I've done all the things - 77mm pulley, tune, heat exchanger, etc... The stock SL motor has some great power but needs quite a bit more to notice any difference - especially once you get used to the stock power.
I previously had a 4 cylinder Turbo Ford motor that I stroked with all billet parts. It put out over 400 WHP and 500 WTQ. I then added a 50 HP shot of nitrous. I could hardly feel it. Had to bump it up to a 100 shot before it was really even noticeable.
My opinion in adding 50 HP to a SL55 is that you will hardly feel it. Doesn't make a whole bunch of seat-of-the-pants difference. There may be other things you gain with a tune like efficiency, response, and a few other things - but for power, your gonna have to add over 100 HP to make any real difference noticeable.
I've done all the things - 77mm pulley, tune, heat exchanger, etc... The stock SL motor has some great power but needs quite a bit more to notice any difference - especially once you get used to the stock power.
