6.3 amg stroker kit?????
01-05-2012, 01:39 AM
#28
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01-05-2012, 04:00 AM
#29
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That was my point for bumping this thread although this thread should be in W211 AMG since it's the center of the forum. A Weistec 7 ltr 63 would be a creature of absolute pure violence. I think because of the increased stroke torque will really go through the roof. Not sure how the 7 spd will take it though. But seriously does anyone have updates or know a company that does this? 
01-05-2012, 08:49 PM
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2010 C63
http://www.motortrend.com/roadtests/...e/viewall.html
01-05-2012, 09:05 PM
#33
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I'm pretty sure you should study the 5.5L AMG a little. It uses the 7-speed transmission. Read up.
http://www.motortrend.com/roadtests/...e/viewall.html
http://www.motortrend.com/roadtests/...e/viewall.html
The 722.6 5spd transmission is one of these strongest if not the strongest transmission AMG has ever built. They can hold massive amounts of torque. Case in point....SL65, SLR, CL65, and E55.
01-05-2012, 10:46 PM
#34
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+1
Your talking about the 5.5TT AMG's which uses the MCT transmission, not the old 5 speed.
The 722.6 5spd transmission is one of these strongest if not the strongest transmission AMG has ever built. They can hold massive amounts of torque. Case in point....SL65, SLR, CL65, and E55.
Your talking about the 5.5TT AMG's which uses the MCT transmission, not the old 5 speed.
The 722.6 5spd transmission is one of these strongest if not the strongest transmission AMG has ever built. They can hold massive amounts of torque. Case in point....SL65, SLR, CL65, and E55.
It's just incredible the amount of torque and power than gearbox handles. It may not be the fastest or most sophisticated unit but it definitely gets the job done. The new MCT is amazing though and it's said to hold alot of power and torque too and it should since the new engines need only a tune to produce mind boggling results. Those new TT V8s are no joke, they will possibly produce the first 9 sec AMG.
01-10-2012, 01:49 PM
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I don't know what the rod length is on the M156 but unless a bigger crank is used with a longer rod (achieving a higher piston CH), then the piston speeds and acceleration along with cylinder wall thrust loads are going to INCREASE.
This, of course, means that your engine will be potentially less reliable due to wear on cylinder walls and will have to rev lower (unless you're OK with Formula1-level engine forces on your internals). Drag racing isn't for low-revving cars where I come from.
Again, I'm new so I'd appreciate anyone explaining this.
01-10-2012, 03:17 PM
#36
What? How is a lower redline beneficial for one to "run 1/4 miles all day long"?
I don't know what the rod length is on the M156 but unless a bigger crank is used with a longer rod (achieving a higher piston CH), then the piston speeds and acceleration along with cylinder wall thrust loads are going to INCREASE.
This, of course, means that your engine will be potentially less reliable due to wear on cylinder walls and will have to rev lower (unless you're OK with Formula1-level engine forces on your internals). Drag racing isn't for low-revving cars where I come from.
Again, I'm new so I'd appreciate anyone explaining this.
I don't know what the rod length is on the M156 but unless a bigger crank is used with a longer rod (achieving a higher piston CH), then the piston speeds and acceleration along with cylinder wall thrust loads are going to INCREASE.
This, of course, means that your engine will be potentially less reliable due to wear on cylinder walls and will have to rev lower (unless you're OK with Formula1-level engine forces on your internals). Drag racing isn't for low-revving cars where I come from.
Again, I'm new so I'd appreciate anyone explaining this.
My thoughts too. With the increased stroke piston speed is reaching F1 levels. 4.20inch stroke would be needed to hit a 427CI.
At 7000+rpm, piston speed is up there.
01-10-2012, 03:28 PM
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C63
+1
Your talking about the 5.5TT AMG's which uses the MCT transmission, not the old 5 speed.
The 722.6 5spd transmission is one of these strongest if not the strongest transmission AMG has ever built. They can hold massive amounts of torque. Case in point....SL65, SLR, CL65, and E55.
Your talking about the 5.5TT AMG's which uses the MCT transmission, not the old 5 speed.
The 722.6 5spd transmission is one of these strongest if not the strongest transmission AMG has ever built. They can hold massive amounts of torque. Case in point....SL65, SLR, CL65, and E55.
In all fairness I had a C55 do that is exactly the tranhy I was talking about.
01-10-2012, 04:27 PM
#38
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01-10-2012, 05:45 PM
#39
It has a 4inch stroke, piston speed around 4700.
With a 4.2 inch stroke of this modified AMG engine, piston speed would be 5000 at 7200rpm. That is what F1 runs, and I don't think their engines last too long. Given they are operating at higher RPMs constantly.. Its still a lot of strain on the bottom end.
My Harley has a 4.75inch stroke and a 6000rpm redline, piston speed around 4700. I wouldn't push it much higher as the forces on the rods, pistons and crank get excessive.
With a 4.2 inch stroke of this modified AMG engine, piston speed would be 5000 at 7200rpm. That is what F1 runs, and I don't think their engines last too long. Given they are operating at higher RPMs constantly.. Its still a lot of strain on the bottom end.
My Harley has a 4.75inch stroke and a 6000rpm redline, piston speed around 4700. I wouldn't push it much higher as the forces on the rods, pistons and crank get excessive.
01-12-2012, 01:36 AM
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03-24-2012, 04:28 AM
#41
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So has anyone actually done this or is this just talk? A 7 litre Weistec 8-cyl would be catastrophic. These things are lacking in torque (compared to the 55k anyway 
) even with Weistec kits and torque is what we like Torque is manly and what separates the ricers from the muscle cars.
) even with Weistec kits and torque is what we like Torque is manly and what separates the ricers from the muscle cars.
03-24-2012, 06:20 AM
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Vath ML63 Brabus C63 SL63 CLK63BS C63BS
[quote=e500slr;5116595]So has anyone actually done this or is this just talk? A 7 litre Weistec 8-cyl would be catastrophic. These things are lacking in torque (compared to the 55k anyway ) even with Weistec kits and torque is what we like Torque is manly and what separates the ricers from the muscle cars.[
Weistec supercharged lacking in torque?? Are you for real??
) even with Weistec kits and torque is what we like Torque is manly and what separates the ricers from the muscle cars.[Weistec supercharged lacking in torque?? Are you for real??
Last edited by Maverick1975; 03-24-2012 at 06:24 AM.
03-24-2012, 12:38 PM
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I do not believe there is a stroker kit available and as far as I understand from the professionals it can't be stroked out to 7.0. The cylinder walls are too thin and the crank will be the only place we gain displacement. I believe you can go to a 6.8 but thats all you can get. There may be others that know better but thats what I have been told. For road racing I would have loved to have a stroker but its not in the cards.
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djr48312 (06-21-2023)
03-25-2012, 05:01 AM
#44
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Read the post again, I said compared to the 55k which it is. For example Exotic's CL55 is making nearly 1000Nm of torque AT THE WHEELS. That's the same as a Bugatti Veyron So yes the 6.3s just don't match the 55k for torque. It doesn't mean they're bad engines, I'm just stating facts.
So yes the 6.3s just don't match the 55k for torque. It doesn't mean they're bad engines, I'm just stating facts.
Last edited by e500slr; 03-25-2012 at 05:03 AM.
03-28-2012, 04:37 PM
#45
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01-08-2023, 06:12 PM
#46
Nobodies taken this any further? I'm pretty sure when i came into the C63 game back in 2016 that SOMEBODY made a 408 or 427 stroker kit for this beast. You could google it at the time. I don't see it anymore. If I were to undertake it myself, going a full 427 cubic inches would not be necessary, just some cubes that will allow me to run a bigger cam and keep the power band down some. My thoughts on the matter was:
1.85" rod journal rods custom fit ( stock rod is 5.72" long 145.49 mm with a 2.07" rod journal ) https://pauter.com/parts/rods/mercedes-benz/
off set ground stock crank for the 1.85" journal ( stock rod journals are 2.07 ), so you could get approx .20" of additional stroke which would get you to 402 ci ( 6.53L )
custom piston
The smaller rod journals minimize any rod bolt clearance issues in the block and if there were any a die grinder could quickly sort it. I'm confident most of the stroker kits at the time considered a 2.07 or 2.10" rod journal size, which would make the rod bolts more likely to hit than the smaller rod 1.85" rod journal )
1.85" rod journal rods custom fit ( stock rod is 5.72" long 145.49 mm with a 2.07" rod journal ) https://pauter.com/parts/rods/mercedes-benz/
off set ground stock crank for the 1.85" journal ( stock rod journals are 2.07 ), so you could get approx .20" of additional stroke which would get you to 402 ci ( 6.53L )
custom piston
The smaller rod journals minimize any rod bolt clearance issues in the block and if there were any a die grinder could quickly sort it. I'm confident most of the stroker kits at the time considered a 2.07 or 2.10" rod journal size, which would make the rod bolts more likely to hit than the smaller rod 1.85" rod journal )
01-08-2023, 10:08 PM
#47
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I've never heard of any striker kits. Do one up and I'm sure some people would be interested. I think the price is going to end up being prohibitive u less you are into a maxed out supercharged build and wanting a bit more. But then you would already be up into the 4 digits power so not sure hot much more you really need.
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djr48312 (06-21-2023)
06-21-2023, 06:05 PM
#49
SLS with a camshaft upgrade could make power out there... If you need to feel more torque to the ground after that change the rear end ratio. Did you have any experience with C63/SLS revving and making peak power at 8000+ rpm?
