Bought 2 2006 S65's, now for the tuning questions
He wants the RENNtech stage three package. ECU tune, lowering module, CF airbox, intercooler, transmission upgrade, exhaust, LSD, and S3 16.2" brakes in the front with the 14.2" rears.
The brakes require 20" wheels. How much worse will the ride be with 20" wheels (and don't tell me it won't affect the ride, I know it will
)? Also, how wide wheels and tires can I fit under it? I don't mind rolling the fenders out (I've done it to about a dozen other cars for my race team).
Thanks!!
Ricky
edit: I also should mention that I am not dead set on RENNtech (I would just like to do business with them as Tomas is proving to be invaluable helping me with my S74 conversion).
Last edited by MB_Fahrer; Feb 19, 2011 at 11:58 PM.

Lowering module isn't really necessary, it can be done with a star computer. That's how I lowered mine.
I didn't go with the LSD as some friends told me it's a waste of money, that it would never be used in street racing.
I have 18" wheels I think the ride is to hard, can't imagine 20." I upgraded my brakes to the S55 brakes instead of the S65 brakes for that reason. I would have liked more stopping power, the S55 brakes are just barely ok.
I think the widest wheel I read about was 11" wide (but I could be mistaken). I think with that much surface area I'd be rotating tires every other month. I already smoke my tires at stop lights unintentionally.
One upgrade I did was to install a boost guage on the pillar and I had it wrapped in alcantara.
What is the "star computer" ? Sorry this is a whole new world to me. I'm a noob at W220's. I've done tons of research on them, and promptly forgot everything I read when I bought my W140. LOL.
Have you noticed wheel slippage problems without the LSD? RENNtech offers a 100% locking rear diff. I would imagine it would be a good thing to have for track days? He doesn't plan on tracking it, but usually if you track-tune a car it winds up better for street usage (from my experience anyway).
Thanks for the tip on the wheels, I will definitely not recommend the brake upgrade so we can keep 18" wheels. From the racing standpoint again, I would like to get a set of lightweight 18x11.5/18x12 in the rear? And then the widest front wheel and tire as possible. We will be in Germany with the car we take so tires with a y or z speed rating are a must.
Do you have any pictures of the boost gauge?
Thanks!!
What is the "star computer" ? Sorry this is a whole new world to me. I'm a noob at W220's. I've done tons of research on them, and promptly forgot everything I read when I bought my W140. LOL.
Have you noticed wheel slippage problems without the LSD? RENNtech offers a 100% locking rear diff. I would imagine it would be a good thing to have for track days? He doesn't plan on tracking it, but usually if you track-tune a car it winds up better for street usage (from my experience anyway).
Thanks for the tip on the wheels, I will definitely not recommend the brake upgrade so we can keep 18" wheels. From the racing standpoint again, I would like to get a set of lightweight 18x11.5/18x12 in the rear? And then the widest front wheel and tire as possible. We will be in Germany with the car we take so tires with a y or z speed rating are a must.
Do you have any pictures of the boost gauge?
Thanks!!
The mercedes STAR is a computer that they have at the dealership. With that computer, you can lower the car on the air suspension. Its safe and easy. There are some members that have the computer as well as indy mechanics. There is even a how to in the E55 section that is a sticky.
congrats on the cars, they are awesome machines!
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Mike
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I was thinking about buying a W220 S600/65, but I couldn't do it. I love the W140 600's too much. So I went out and bought a '92 with 34k miles black on black. I'll be swapping in a 7.4L RENNtech tuned V-12 (M120 platform) into it. I'm shooting for 700hp and wherever the torque falls. I'm doing twin standalone ecu's, an intake similar to what Pagani uses on the old Zonda F, a Junction Produce Ares bodykit, full air ride suspension, and loads more. I love the W220's, but they are not me. Too many electronics, and the airmatic/ABC crap scares me. At least with my car I'll be running Bilstein sport shocks with an air bag kit from Air Ride Technologies. To answer your question though, all I know is my father said for me to order the RENNtech stage three parts. I found the RENNtech dealer in Colorado, so I'll call them up later and order everything. I'll do the ECU, TCU, lowering module (found one on ebay for $700 that I already bought), the CF airbox, intercooler pump upgrade (going to ask about a larger intercooler as well), the locking rear differential, the stage one brake upgrade (SS lines, racing pads, racing fluid), and the Valentine One that is hidden away in the rear view mirror.
Tell him hello from Alex in TX. www.speedriven.com
He will quench your thirst for everything V-12... at a value. I have an 06 s65 ECU and TCU flash. Good buy on the lowering module...make sure to buy a remote.





