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C63 Lightweight and N/A Power Build vlog

Old 01-11-2019, 01:51 PM
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Smile C63 Lightweight and N/A Power Build vlog

Hey guys!!

After lurking around this Forum for years and imagining what it would be like to also own a W204 C63, I am now finally in the club! And I couldnīt be happier with the car, itīs already an absolute blast to drive!

I do plan to mod the car quite extensively over the course of the year and also take it to as many tracetracks, dragstrips and possibly drift events as I can.

Currently the plan is to:

1) Take as much weight out of the car as possible
- remove rear seat divider
- replace front seats with light recaros
- remove rear sunshade
- remove parts of the big Stereo
- CF hood and trunk
- delete the sunroof
- lightweight battery
- hopefully magnesium intake and single throttle body from the SLS
- anything else that I can think of, and maybe you guys can help me with that as well! Always looking for more ideas to shave weight off the car.

I hope to get at least 150 KG (330 lb) out of the car, more if possible.

2) Moar power!!

- Complete IPE exhaust incl. LTH
- if budget allows: porting of cylinderheads
- if budget allows: Magnesium intake and throttle body from the SLS
- Tune at Simon Motorsport (very good german tuner and expert for the M156)
incl. different air filters, full exhaust, sparkplugs and 102 octane tune

I hope to get the over 600 crank HP.

Anyway, I have started with the first baseline test Video today, so I figured it would be a good time to start this thread.

I will do three baseline test: Fuel consumption, acceleration and weight

Today I started with the fuel consumption and as you guys know all too well, itīs a thirsty car:


I also did a driving video with the car here:

Anyway, I am really looking forward to start the modding journey! I have always loved to mod my cars and I hope that the C63 will be the first one that I wonīt have to sell but keep pretty much forever. Time will tell

If you guys have any tips about saving more weight I would very much appreciate it!

This is it for now, I will update this thread with the latest news. You can expect a bi-weekly (the "two times per week" kind, not the other one) video on the cars progress.

Cheers,

Alex
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Old 01-11-2019, 02:13 PM
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600 bhp is possible without the SLS intake mani. PNP heads with FBOs and a dyno tune should get you there, especially on 100 octane. The SLS intake mani put the powerband higher up in the rev range, which I heard can hurt you on a road course since you lose some of the midrange. Couple that with PNP heads that will likely shift the powerband up higher as well, and the car might not be as fun. I know I enjoyed the borad, flat torque curve of the M156. Plus it's really difficult to get it to fit in there. I would just do LTHs/exhaust, dyno tune, and maybe PNP heads. What are you doing for suspension too? The rest of the build sounds good though! Enjoy.
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Old 01-11-2019, 04:32 PM
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Girodisc or racingbrake 2 peice rotors save a bit of weight, forged 18” wheels should also.
Which year do you have? I belive facelift has aluminium hood and some of those cheap CF hoods are likely to not be much lighter if at all.
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Old 01-12-2019, 11:26 AM
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Originally Posted by chrisridebike8 View Post
600 bhp is possible without the SLS intake mani. PNP heads with FBOs and a dyno tune should get you there, especially on 100 octane. The SLS intake mani put the powerband higher up in the rev range, which I heard can hurt you on a road course since you lose some of the midrange. Couple that with PNP heads that will likely shift the powerband up higher as well, and the car might not be as fun. I know I enjoyed the borad, flat torque curve of the M156. Plus it's really difficult to get it to fit in there. I would just do LTHs/exhaust, dyno tune, and maybe PNP heads. What are you doing for suspension too? The rest of the build sounds good though! Enjoy.
Thank you for the reply!! Good to hear that 600+ HP is doable without the intake, and also a good point about losing torque in the low rpm range.

I am really very happy with the suspension as it is right now, both in terms of chassis balance (sooo much front end grip, the car doesnīt understeer at all which is rare for a merc) and road feel/comfort.

So if I would go for a different suspension it might be for weight saving purposes only. That being said, if I could save at least 10 lb per wheel with a lighter damper/spring combo, then I might go for it.
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Old 01-12-2019, 11:30 AM
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Originally Posted by Catchyname View Post
Girodisc or racingbrake 2 peice rotors save a bit of weight, forged 18” wheels should also.
Which year do you have? I belive facelift has aluminium hood and some of those cheap CF hoods are likely to not be much lighter if at all.
Hmm does the girodisc brake really save all that much over the P30 brake which is already a 2 piece rotor? Plus the brakes are among the best parts on the car, it would be a shame to change them.

I already have 19 Inch OZ wheels ready for the summer (with Michelin Supersport tires) they should save a bit of weight hopefully.

The modelyear is 2009, so it probably still has the heavy hood. I have already seen that the weight of the CF hoods can vary by as much as 10 pounds! I will have to do some research about that that before buying one.

Iīd like to go for a Black Series/Edition 507 hood, so it pulls a bit of hot air out of the engine bay. Donīt care about a high gloss finish since I will be wrapping the car anyway.
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Old 01-12-2019, 01:09 PM
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If I could start all over I would just supercharger it and cut out the second cats and call it a day.
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Old 01-12-2019, 01:14 PM
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Congrats on the new car !

I do think the Giro's may be lighter that the RB's I used - both save a decent chunk over even the 2pc OEM versions.

A braille battery and removing the spare and tools can net you about 85lbs in savings.... Underdrive main pulley may be worth considering, and even E85 if you aren't too cold there.... it's a bit rough starting on the few 30 degree days we get here.....
600hp at the crank is doable for sure..... add in POP and/or SLS and likely the related intake needed, and you could push all of that and more... but the curve and Tq behaviour will shift... my car with most of those mods is at 517 rwhp currently. Hoping to get her to the dragstrip next Friday to see how she fares.

Cheers.

E
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Old 01-12-2019, 03:50 PM
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Originally Posted by Texas E63 View Post
Congrats on the new car !

I do think the Giro's may be lighter that the RB's I used - both save a decent chunk over even the 2pc OEM versions.

A braille battery and removing the spare and tools can net you about 85lbs in savings.... Underdrive main pulley may be worth considering, and even E85 if you aren't too cold there.... it's a bit rough starting on the few 30 degree days we get here.....
600hp at the crank is doable for sure..... add in POP and/or SLS and likely the related intake needed, and you could push all of that and more... but the curve and Tq behaviour will shift... my car with most of those mods is at 517 rwhp currently. Hoping to get her to the dragstrip next Friday to see how she fares.

Cheers.

E
Interesting to hear that some weight can be shaved off from the P30 brakes! I will have to do some research on that.

I heard different opinions about the pulley swap, I assume you save a little bit of weight and increase crank hp a bit? Are there any disadvantadges to that (increased wear)?
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Old 01-12-2019, 03:58 PM
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I think the real issues on the pulley would be lower AC power and a bit less Alt but for my use I'm okay with that..... I'm not tracking it alot - and if I run Big Bend road race I'll survive in April without ac....

hard to know what gains it alone provided, as I did that plus the headers and E85 all at once.... but worth considering doing it along with the Bullet Pulleys ( UPD) and new Tensioner as PM.

E
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Old 01-12-2019, 05:09 PM
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Just when your rotors wear out you change them for the girodisc units, no caliper changes.
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Old Today, 11:18 AM
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Smile

Hey guys!

Thank you for all the replies btw!!

Just uploaded a new baseline video where I weigh the car and do a juicy 3rd gear burnout just for fun.

The car was weighed with a full tank of gas and obviously oil, water and washer fluid were in there as well.

The result was 1820 KG or 4012 lb! Itīs a heavy car, but hopefully that will change very soon.

Next up will be the acceleration test on the Autobahn. I just have to catch a day where it is not raining…

Anyway here is the video about it:
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Old Today, 11:53 AM
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O man! You need an LSD! That one tire fire!
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