v10boost

Hello,

What have you done to your SL55 and what is end hp numbers? post graph if you have it. Lets see what combo works.

jmf003

Mods as listed in my signature. No dyno but given the track results my car probably makes around 625 crank horsepower.

v10boost

How much hp do you think TB and cams picked up? 40?

MBH motorsports

I plan on bolting on about 100whp more in the coming month. Stock power I'm at 410ish to the wheels. I think with my Long tube headers, pulley+tune That should net about 100whp.. theoretically. Then some cooling mods that are a must.

I've need a few big powered 55's in my day. With this combo: 180mm pulley or even 178mm pulley, Dyno tune, Long tube headers, Throttle body, airbox, cooling. You would be around the 550whp mark, give or take.

Optional ideas: 100oct tune, more cooling mods? I've seen E55's put down 480+whp just my doing mods I've mentioned and tuning for race fuel.

You dont have to think outside of the box to make big power with these cars. Its when you hit the wall or end of the conventional mods do you have to.

jmf003

Pulley and ECU tune are the biggest bang-for-the-buck mod, which isn't your question but is the typical first mod.

With my car I did the TB and cams before the pulley mod, mostly just to see how it performed. 30-40 HP is probably the right range. Throttle response was also a bit better with the bigger TB.

IngenereAMG

This is the set up as I have, but the dyno is from a client car with the same set up.

Veloce Performance ECU tuning
K&N Filters
Headers

FLSL55

Dino, no pulley? Stock boost?

MB_Forever

Those gains are without a pulley?

IngenereAMG

No pulley, pump gas and it has been perfectly reliable.

Since '03 we have gone through a number of permutations of software to get this done, but it has been worth it.

FLSL55

So the next obvious questions is....why no pulley?

MB_Forever

Very impressive gains without a pulley

andy_meng1024

Any heat issue?

v10boost

Where did you get your SLR camshaft? How much are they? Does SLR cam make more power than other aftermarket cams?

whoelse makes cams for 55 motors?

Thanks

jmf003

I just this month traded my SLR cams for a set of VRP cams. The VRP cams were designed by forum sponsor PTE Engineering. The VRP/PTE make the most power of any cams for the 55K engine. I don't know if they are still being sold but Patrick from PTE could probably answer that question.

The SLR cams were something of a science project led by forum members Jakpro and Chiromikey. They make less power than the VRP/PTE cams but are a bit smoother, which is why forum member Tech-Tune wanted to make the swap. The only sources for SLR cams are Mercedes (if you can find someone to sell you a set) or one of the people who previously purchased SLR cams.

Kleemann also make cams for the 55K. Schrick does as well, at least they used to.

If you search the forum you'll find a wealth of information previously written on the topic including https://mbworld.org/forums/w211-amg/...rger-cams.html

Hope that helps,

sbenus

maybe i'm wrong but isn't the supercharger the choke point. if it's gonna put out X pounds of boost no matter what, then what effect does a bigger intake or throttle body have?

full disclosure: i got a CF airbox but it's also b/c i really like the look

Havoc

The S/C is not a choke point. Increasing the airflow to the S/C will make it run more efficient which will result in power gains. You can also increase the boost of the S/C with a larger crank pulley and therefore adding to the power gains from a bigger intake and throttle body.

If there is a choke point it would be the stock intercooler which is located directly underneath the S/C and its small size limits the amount of air going into the heads. By building a larger intercooler you can increase the airflow to the heads and increase the cooling capacity. There are a few people who have built custom top mounted coolers like the ones on the SLR.

Also, a free flowing exhaust system with low back pressure will help the S/C do its job and will result in great gains as well. More air in, more air out!

Sunir

IC redesign and exhaust can help but I still think the SC eventually reaches it's limit...although low rpm throttle response and boost are available instantly from the belt driven charger it's tunability is finite unlike that of a turbo.

Havoc

What blows my mind is how the SLR 722 GT is pumping out 25 psi!
The way I see it, unless a 55K is pumping out close to 25 psi, then the S/C is not near its full potential through efficiency. Now the SLR 722 GT has a slightly lower compression for safety which means its S/C is spinning even faster to reach 25 psi!
How do they do it!!

thor4585

SL55 added larger johnson intercooler, larger pulley and Kleemann ecu tune. Added 91 HP (dyno) for about 3k. Lucent Motors in West LA did the work.

Havoc

Johnson Intercooler?? Do you mean Heat Exchanger or HE Pump??

BTW.. you're not going to see a 91 HP gain with just a pulley and tune..

MB_Forever

Just a side note, I was told that the Kleemann cams are indeed the Schrick cams.

thor4585

Unless the dyno jet was inaccurate I beg to differ. And yes it is a Johnson CM30 intercooler pump. I suggest you speak with Tom owner of Lucent Morors in West LA as he know much more than me . He guarantees a min gain of 80hp but states average is above that. Dyno seem to prove him right .

Sunir

shops generally tend to pit their own mod recommendations and back them up on their own dynos (which are ussually high reading dynos like a dynojet for example). In all reality you can make a dyno say whatever you want it to at the end of a pull...that's the scary part

BeltFedBob

475hp/514tq at the wheel.

168mm pulley, 80mm TB, green filters, Kleemann tune and headers, resonator delete, new MB coolant pump.