M113 vs M156 NA
12-06-2018, 09:05 PM
#1
M113 vs M156 NA
thinking of either doing swap to M156 (6.2l) or spending money instead on my current engineNA. Work would be port&polish head, larger throttle body, modify/custom intake manifold, forged Mahle Pistons (maybe with higher compression). From cost perspective both options should be same. Btw car currently is probably over 420 hp, I have kleeman cams & headers, renntech airbox with bmc filters, custom 2.5 inch dual exhaust, and dyno tune. Car dyno similar to e90 m3 and on track are fairly even on straight.
m156 is “obviously” better engine but apparently it weighs 70lbs more. If I can get to 500hp on m113 that might be better option?
apprecite any feedback and info. Goal is to be around 500hp na.
... or another option, sell car and get another track toy? If anyone is interested let me know. Will be hard pulling trigger though, car is probably too special for me to sell.
m156 is “obviously” better engine but apparently it weighs 70lbs more. If I can get to 500hp on m113 that might be better option?
apprecite any feedback and info. Goal is to be around 500hp na.
... or another option, sell car and get another track toy? If anyone is interested let me know. Will be hard pulling trigger though, car is probably too special for me to sell.
12-07-2018, 12:04 PM
#2
MBWorld Fanatic!
Your car is already "full track", isn't it? If you can live without ABS and ESP, you might consider going to a full standalone ECU on your current setup. I'm in the process of doing that right now. I hope to find out by spring how much power the factory ECU keeps locked away, even with a "tune" in it. Full standalone will give endless tuning possibilities.
12-09-2018, 10:36 AM
#3
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2002 CLK 55 AMG cabriolet Eurocharged
Tuning the ECU is an apparent gain within the engines scope of reliability.
I was curious about this for some time and read about a piggyback system that might keep reliability and max desirable power in user hands.
Putting a M156 will be a challenge along with any required electronics. Fun Fun Fun.
Cheers, Gator
I was curious about this for some time and read about a piggyback system that might keep reliability and max desirable power in user hands.
Putting a M156 will be a challenge along with any required electronics. Fun Fun Fun.
Cheers, Gator
12-11-2018, 01:30 PM
#4
MBWorld Fanatic!
What does an ECU tune get you on a normally aspirated engine? 
Either motor is a win for power and torque tho the liter M113 might be the better choice to build if you track and care about weight.
Either motor is a win for power and torque tho the liter M113 might be the better choice to build if you track and care about weight.
12-13-2018, 04:30 PM
#7
MBWorld Fanatic!
Keep us posted. I am wondering how to fit a larger TB on the factory intake. I might even play around with rotating it so the TB is at the front.
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12-13-2018, 07:59 PM
#8
Not sure tb can be at the front, there is very little space. Let me know if you come up with anything .
I looked at larger Tb but we need to open up the inlet of intake manifold but that might not be possible. I think fully custom intake manifold is needed.
I looked at larger Tb but we need to open up the inlet of intake manifold but that might not be possible. I think fully custom intake manifold is needed.
12-27-2018, 06:19 PM
#9
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Getting more air in is not as hard as getting it out. The problem is chassis restriction for headers.
If you build a better air intake system the Tuner whoever will fight this along with your expense,
Since you are track only consider modifying the chassis for some long tube headers like the E-W210/211 guys have available.
The W208 is light strong and low. The blue Wrench and some creativity might save or wreak.
Happy New Year
If you build a better air intake system the Tuner whoever will fight this along with your expense,
Since you are track only consider modifying the chassis for some long tube headers like the E-W210/211 guys have available.
The W208 is light strong and low. The blue Wrench and some creativity might save or wreak.
Happy New Year
12-27-2018, 06:32 PM
#10
MBWorld Fanatic!
Getting more air in is not as hard as getting it out. The problem is chassis restriction for headers.
If you build a better air intake system the Tuner whoever will fight this along with your expense,
Since you are track only consider modifying the chassis for some long tube headers like the E-W210/211 guys have available.
The W208 is light strong and low. The blue Wrench and some creativity might save or wreak.
Happy New Year
If you build a better air intake system the Tuner whoever will fight this along with your expense,
Since you are track only consider modifying the chassis for some long tube headers like the E-W210/211 guys have available.
The W208 is light strong and low. The blue Wrench and some creativity might save or wreak.
Happy New Year
12-27-2018, 06:43 PM
#11
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Shorties will gain low end Tourqe. I am enjoying this now with OBX 2.25 ID out.
The CLK55 was shipped detuned with CLK 430 exhaust manifolds. The Kleeman shorties if you can find them are moderate performers.
Again I say working within the limitations of the engine age excluded.
Road tracking with high end Stuttgart friends will need some healthy mods with a car this age.
Best, Gator
Folks 2.25' is nothing but much better than stock. 351C race engines were good all day with 2 1/8" primaries and 7800 rpm cruise 10000 rpm when needed. gtr
The CLK55 was shipped detuned with CLK 430 exhaust manifolds. The Kleeman shorties if you can find them are moderate performers.
Again I say working within the limitations of the engine age excluded.
Road tracking with high end Stuttgart friends will need some healthy mods with a car this age.
Best, Gator
Folks 2.25' is nothing but much better than stock. 351C race engines were good all day with 2 1/8" primaries and 7800 rpm cruise 10000 rpm when needed. gtr
Last edited by GatorMB; 12-27-2018 at 07:39 PM. Reason: added content
12-27-2018, 06:50 PM
#12
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I put A LOT of thought into the exhaust on this car. My original plan was to convert to manual R&P to get rid of the steering box, then cut off the rear LCA mounts and build a set of strut rods to stabilize the LCA's from the front instead of the rear like the OEM arms do. Then you would probably need to notch the floorboard on the driver's side to match the passenger side. In the end I changed my plan to put on a pair of shorty headers, exiting out the front of the engine, over to a turbo in the passenger side fender well. Even that's all theory at this point.
There are some Long tube header out there but not available public. They are chassis proven. Having a Exhaust gearhead friend helps.
Cheers
You will shave much weight by converting to RnP which is important in Drag racing. The nex mod should be camber bushings for rear then shocks.
Last edited by GatorMB; 12-27-2018 at 07:00 PM. Reason: added content
12-28-2018, 01:16 PM
#13
MBWorld Fanatic!
2precice has a twin turbo W208 CLK55. It has been some time since hes come out but he did the W208 with Rack and pinion steering.
There are some Long tube header out there but not available public. They are chassis proven. Having a Exhaust gearhead friend helps.
Cheers
You will shave much weight by converting to RnP which is important in Drag racing. The nex mod should be camber bushings for rear then shocks.
There are some Long tube header out there but not available public. They are chassis proven. Having a Exhaust gearhead friend helps.
Cheers
You will shave much weight by converting to RnP which is important in Drag racing. The nex mod should be camber bushings for rear then shocks.
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GatorMB (01-05-2019)
12-28-2018, 04:08 PM
#14
Agree and love excitement W208 still gets 
i have kleemann headers swain coated along with custom 2.5in dual exhaust with pipe and race cats. Car pulls extremely hard all the way to redline. Actually have been taking it to 6500 with no issues. I agree there is a lot to gain with long tube headers but that has to wait, I don’t think right now exhaust is my issue.
i have an idea on intake side that could work and allow us to run 82mm Tb. I think anything more than 400hp the 74mm stock ones become restrictive. Need at least 78 and low 80s will be more appropriate. I might do it soon or wait till end of 2019 when I get complete engine rebuild. My goal is mid 400 whp na.
focus right now is custom wide body (similar to renntech clk60 gt ) and clubsport / racing suspension (swift linear springs + Penske racing shocks). Talking to shops about getting this done before track season, keeping fingers crossed.
on steering box, I tried to look for better option r&p, racing style box, etc but nothing available. Even custom is hard to get anyone knowledge to pick up project. I generally don’t mind feel of box, I got used to it, but weight saving and extra space for long tube headers is very intriguing.
merry Christmas/happy holidays/happy new year everyone
i have kleemann headers swain coated along with custom 2.5in dual exhaust with pipe and race cats. Car pulls extremely hard all the way to redline. Actually have been taking it to 6500 with no issues. I agree there is a lot to gain with long tube headers but that has to wait, I don’t think right now exhaust is my issue.
i have an idea on intake side that could work and allow us to run 82mm Tb. I think anything more than 400hp the 74mm stock ones become restrictive. Need at least 78 and low 80s will be more appropriate. I might do it soon or wait till end of 2019 when I get complete engine rebuild. My goal is mid 400 whp na.
focus right now is custom wide body (similar to renntech clk60 gt ) and clubsport / racing suspension (swift linear springs + Penske racing shocks). Talking to shops about getting this done before track season, keeping fingers crossed.
on steering box, I tried to look for better option r&p, racing style box, etc but nothing available. Even custom is hard to get anyone knowledge to pick up project. I generally don’t mind feel of box, I got used to it, but weight saving and extra space for long tube headers is very intriguing.
merry Christmas/happy holidays/happy new year everyone
Last edited by Quant; 12-28-2018 at 04:11 PM.
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GatorMB (01-05-2019)
01-07-2019, 05:25 PM
#15
What does your car dyno at now, more than 350whp or 370 tq?
