Ohbev

e55 amg and SL55 amg both have same engine but how does amg get 24 hp more out of the SL engine stock what have they done diffrenet exhaust/boost/ecu HOW>???

jpohl402

Nothing is different, except the advertised numbers. SL and S-Class are the "flagship" cars, with a higher price tag. They don't want to advertise the same performance figures on a so-called "lesser" car - so the marketing ploy is that you get more when you pay more......... Nothing is different w engine (obviously weight of cars varies a bit)...... Hope this helps

itsmeek

I am not trying to make a counterpoint or argue your knowledge but I may have read somewhere here that the exhaust system on the e55k is more restrictive. Is this true?

jpohl402

Possible, though I have no knowledge of it. Everything I have learned has stated everything is the same.

Blacksport350

Yes it is ever so slightly more restrictive and accounts for may a few lost ponies.

Bottom line, same engine, same level of tune, same power numbers on the dyno. The 469HP figure was political and advertising related as stated above.

prodigymb

some of the 05.5 SL55s have a larger 80MM throttle body that is larger then the E55. as far as i know boost is the same, compression is the same 9.0:1, i would assume exhaust is different because the platforms are different but i don't think thats where the gains are. a lot of people ask me that same question when talking about my car.

i was skimming thru the AMG site and they state that the 5.5K ranges from 476 to 500hp

jangy

That part is pure marketing.

The '07 on SL55s have the 80mmTBs, but they also got bumped by about 25hp on the claims for it.

Wish4_e55Wagon

I understand the motors are the same and they may very well be pre-made prior to insertion in either the K or SL - correct?

Also, if the engines are built to specification and include the same factory tune what can account for the +/- 20 HP difference? Bolt tension on the crank and or pistons? Port and polishing or finish of the block, heads, TB? Tune FW version perhaps?

Cylinder Head

iTrader: (1)

Do a search, this has been mulled over for 5 years now. No difference in power.

alina

the q mill on the e55 number how much is

itsmeek

Say what?

chiromikey

output numbers are near identical but there may be a slight disadvantage on the e55's due to exhaust and intake. the e55 driver's side intake pass at the radiator and intake tube is quite restricted compared to the sl.

Cylinder Head

iTrader: (1)

But not 30 horsepower restrictive.

bigben320e

Interesting point. Perhaps this should be addressed to MB?

MB_Forever

The advertised numbers are purely for marketing reasons....

On the dyno, the E55, SL55, CL55, and S55 all put down the same range of numbers, which is usually 410 to 430 hp . I've seen some of the dynos at a couple of different performance shops: same dyno, same operator, different cars. There were a few exception cars that may have dynoed slightly lower or slightly higher, but the majority I've seen lately was within that range.

chiromikey

absolutely not!

prodigymb

From what I have found most 07s do not come up with the 113 141 05 25 throttle body which is the 80MM one. the easiest way to tell is looking at their vin number 7th digit - if it is a 4 then the car will come up in EPC with a 80MM TB part number, if it is a 2 then it will come up with another part number for the TB.

then i tried to find the car by the supercharger inlet which is 113 140 0912 on the 80mm ones, and strangely enough it popped up with a different TB # 113 140 0104.

So which tb is the 80mm one 113 141 0525 or 113 140 0104 or both?

jangy

I don't know about the numbers but will look them up. I do know that MN raised the claims on the SL55 for '07 by 30hp and the "reasoning" was the 80mmTB. I assumed it was on all '07s but may have been phased in. The only issue is that they would have to change claims mid year through and I was almost positive they did it on the '07 because it was an older platform and needed to compete.

prodigymb

113 140 0104 is what came in a 07 SL55, the latest 80 mm info that i found posted by in a thread with exotic metal is that 0525 was the 80mm.....

we should put together a 80MM TB FAQ and add it to the DIY section

MB_Forever

The 80 mm TB should be on ALL 2007 SL55s. I don't know why there are 2 different part numbers for it, maybe they changed suppliers or something else on the part itself, but I know that ALL 2007 SL55s are rated at 510 hp while all other SL55s were rated at 493 hp. Also, I remember reading about the upgrade in one of the SL brochures.

Ohbev

I think your right the SL55 must have a better flowing exhaust was driving next to one the other night we were both giving them some hits no room to race just gear down and jump on it next to each other for some fun my e55 is stock and so was his and his was alot louder and his exhaust sounder so much better so i guess they have a better exhaust

mercixus

+1

Wryfox

So this is just '07s? My '04 has a '4' in the seventh digit.

jangy

Sound on the 55K motors does NOT equal power, not that I am arguing the E55 to be less restrictive. the SL doesn't have as long of pipes and resonators / secondary cats (depending what you wanna call them).

xircom200

For a ECU upgrade on a SL55 who would you guys go with Kleemann, Renntech or VRP and why ?