AgSilver

From the factory the E55 theoretically develops 475 HP and 626 HP respectively for the SLR. So, what did MB do differently for a gain of 151 HP? Intercoolers should not be a part of the equation. Throttle body, injectors, camshafts, ECU software? What do you know? And one more thing: What has been done to the SLR's to improve performance?

Forrest Gump 9

It's rumor to have "bigger" supercharger and better flowing headers/exhaust system. Oh yeah, dry sump oil delivery system.

loudandheard

Here's a pic from Finny's thread of the SLR engine:

skratch77

it has to have better heads and cams and those look like water/air coolers that mount ontop of the air intake.

Jakpro1

- e55 hp was under rated by AMG. We have lots of dynos of guys running around 500hp stock. (I will give you everything that I have learned about um over the years)

So start with a 500hp base and add........

- SLR intercoolers HAVE to be included in increased hp. Cory at Kleemann says he sees average of 50hp increase by using SLR intercooler setup alone! It just amazing how horrible our intercooler setup is.

- ECU obviously tweaked for more HP
- SLR cams are different than E55 and have shown to increase hp
- SLR Uses dry sump oil system (unsure whether it actually INCREASES hp)
- Exhaust is truly bizarre on the SLR but has to greatly improve flow and hp over our stockers.
- Instead of using larger crank pulley, they went with tweaked ratio of gears inside the supercharger to crank up the boost. We tried to swap um out but couldn't remove them from blower. They decreased compression ratio for the SLR slightly so I wonder how much boost they cranked into it.

- Heads appear to be kinda the same. Never got a chance to compare valves side by side.
-Guts are obviously 100% different (forged etc) but not sure if that increases hp either. SLR uses same bore and stroke as ours.
- Never found out what size TB they used on the SLR but bet it's larger than our stockers.

So bottom line is.....most of us are already doing close to what they did on the SLR....sans the incredible forged guts/ dry sump system/and slr intercoolers

Those mods would get you to 626 easily.

MRAMG1

Dry sump oiling systems are good for 15-20HP increase do to a decrease in windage, aka oil splashing against the crank impeding rotation.

And no I didn't just make those numbers up either, ha, ha.

Hammer Down

Two TB's?

loudandheard

Yeah, I was wondering the same thing, looks to have a large on and a small one.

skratch77

We have that too,its for the boost !!!

Hammer Down

can someone zoom in on the the two throttle bodies so we can get a part #?

tgoss

+1 This is easily the biggest improvement on the 55k setup in the SLR. Cory told me that we loose close to 5-6 pounds of boost in our stock intercooler system. Whereas the SLR top mounts do not lose that pressure and 1. makes more power and 2. cools way more efficiently.

This a something I wish aftermarket tuners would invest in making. But I guess I couldn't imagine many paying the costs upwards of $6k for such a mod. But then again I know I'd be in line.

loudandheard

Some one did undertake the project, but it has yet to be completed. Here is the thread and some of the work that was done.

https://mbworld.org/forums/w211-amg/...ck-awe-12.html

Tech-Tune

Never noticed the heat sheilding on the spark plug wires before.
Would make a nice addition to those with headers that sit close to their wires.

Hammer Down

So how does the CLK DTM make it work? They are rated at 562hp

Bramage

When you see E55's running 550+ at the wheels, they are at the SLR numbers... (and Dyno Jet is a *little* more forgiving)

This is a Stock SLR from Drag Times:

AMGPilot

One is the throttle body (the larger one) and the smaller one is the supercharger bypass valve which opens up when the car is running off boost

Hammer Down

Does someone have part number for the SLR? if so is it a different part number than ours?

loudandheard

The CLK DTM intercooler is different in that it does not have a boost bypass and it suppose to eliminate the loss of boost.





https://mbworld.org/forums/w211-amg/...ml#post2871297

TopGun32

exhaust manifolds from SLR plug and play to E55?

probably the mid pipes need to be welded or replaced..

stevebez

I think I just wet my pants....

Ali_E55

CLK-DTm also came from factory with 80mm TB, more aggressive cams, diffrent crankcase.

stevebez

I also found this comment very intersting posted on this site from a while back...

"...As anyone will know who has driven an SLR hard in high ambient temperatures, the SLR intercooler water system is not capable of an adequately cool water supply and performance suffers because of it."

If SLR has this issue well we have no chance then ...

From here
http://jalopnik.com/122019/more-on-t...s-of-mechanics

EdoubleNickel

DAMMMIT. Thanks for the morning ****.

loudandheard

I read some thing similar to that as well, but I believe it was from renntech. They said that they needed a larger intercooler pump and were selling an upgrade for an arm and a leg.

I think that people want top mounted intercoolers not for cooling purposes, but to increase their horse power.

SLR Top mounted coolers help a bit with cooling, but I believe it prevents the loss of boost and it will make your supercharger that much more efficient, allowing your engine to make more horse power. Our intercoolers are very inefficient and allow boost to be loss and thus we lose power. I think that's right.

AgSilver

The SLR TB PN is: 137 141 01 25

It's 80mm and requires a simple wiring change.

Don't forget the 80mm S/C adapter.