E55/S55 Engine differences?
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E55/S55 Engine differences?
The E55 is rated at 469 HP and 516 lb-ft and the S55 is rated at 493 HP and 516 lb-ft. If these cars use the same 5.4L block, can someone please clarify what's done to the S55 for the power difference? Also, how much torque can the 5-speed tranny take before it blows its cookies? TIA.
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From: Frisco, TX
'06 M5
From what I understand the main differences for the E55 are:
1. restricted (smaller) air inlet tubes
2. smaller downpipes (S55, CL55, SL55 have roughly 70mm downpipes I believe)
other than that I believe they are identicle. As far as the transmission, I believe it is rated to roughly 900nm. I'm going off memory so hopefully someone else will chime in as I could be way off.
1. restricted (smaller) air inlet tubes
2. smaller downpipes (S55, CL55, SL55 have roughly 70mm downpipes I believe)
other than that I believe they are identicle. As far as the transmission, I believe it is rated to roughly 900nm. I'm going off memory so hopefully someone else will chime in as I could be way off.
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From: Maryland
04E55AMG, 05Dodge RAM 1500 Quad Cab, 02Montero Limited
Originally Posted by Grumpy666
The E55 is rated at 469 HP and 516 lb-ft and the S55 is rated at 493 HP and 516 lb-ft. If these cars use the same 5.4L block, can someone please clarify what's done to the S55 for the power difference? Also, how much torque can the 5-speed tranny take before it blows its cookies? TIA.
None.....They dyno the same HP & TQ (SL55,CL55,S55,E55)
Do a search and you will see this discussed many times, it is all about marketing.
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Originally Posted by 04E55 AMG
None.....They dyno the same HP & TQ (SL55,CL55,S55,E55)
Do a search and you will see this discussed many times, it is all about marketing.
Do a search and you will see this discussed many times, it is all about marketing.
BTW - does anyone know what modifications MB does to this engine to get the power levels of the SLR McLaren?
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From: El Paso, TX
'03 G500, '13 G63, '17 GLS63,
Originally Posted by Grumpy666
OK, I did the search, but the results were too inconsistent to be definitive. The only S55 I found dyno'd at a little over 430HP. The E55's ranged from 400-425HP. Different dynos and varying atmospheric conditions make it difficult to compare numbers. The different air flows between S55 and E55 and the desire to have similar power-to-weight ratios are probably the main contributors to the advertised difference.
BTW - does anyone know what modifications MB does to this engine to get the power levels of the SLR McLaren?
BTW - does anyone know what modifications MB does to this engine to get the power levels of the SLR McLaren?
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From: WOT somewhere in the Bay Area
1951 Caterpiller D6
Factory claims that the engines are exactly the same when built. Due to installation differences like the intake tract, exhaust diameter, length and routing, etc., they must rate the power lower.
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From: Irvine, California
'10 MB E63, '08 ML550 ('05 E55, '05 SL55, '08 E63 GONE)
Originally Posted by 04E55 AMG
None.....They dyno the same HP & TQ (SL55,CL55,S55,E55). Do a search and you will see this discussed many times, it is all about marketing.
Personally I've never seen the logic in what's been frequently termed a "marketing" move - the E55 is hardly going to steal any sales from the SL or CL class, while understating it's HP immediately gives up a competitive edge to the BMW Audi - the real MB sales stealers.
I'd wager that the SL has greater HP due to the airbox and exhaust (these parts are certainly different), however it's moot when it comes to performance... I have NO DOUBT that the lighter and more aerodynamic E55 is a quicker car.
When I have the chance I'm going to run both my 05's on the same dyno one after the other... and perhaps put this argument to rest.
~ Ian
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From: Mia
2005 E 55
I have compared my dyno numbers with that of a cl55 on the same dyno. The days were different but the correction factor was about the same. My car was about 3-5 hp more I will try to post both runs tommorrow. I will post sae and uncorrected and include the weather conditions. The best senerio would be to dyno both cars back to back on the same day, forgot to mention both cars were stock.
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From: Maryland
04E55AMG, 05Dodge RAM 1500 Quad Cab, 02Montero Limited
Originally Posted by IanSL55
I have a SL55 and a E55 and for every E55 owner saying the cars have the same HP and TQ there is a SL55 owner saying they're not...
Personally I've never seen the logic in what's been frequently termed a "marketing" move - the E55 is hardly going to steal any sales from the SL or CL class, while understating it's HP immediately gives up a competitive edge to the BMW Audi - the real MB sales stealers.
I'd wager that the SL has greater HP due to the airbox and exhaust (these parts are certainly different), however it's moot when it comes to performance... I have NO DOUBT that the lighter and more aerodynamic E55 is a quicker car.
When I have the chance I'm going to run both my 05's on the same dyno one after the other... and perhaps put this argument to rest.
~ Ian
Personally I've never seen the logic in what's been frequently termed a "marketing" move - the E55 is hardly going to steal any sales from the SL or CL class, while understating it's HP immediately gives up a competitive edge to the BMW Audi - the real MB sales stealers.
I'd wager that the SL has greater HP due to the airbox and exhaust (these parts are certainly different), however it's moot when it comes to performance... I have NO DOUBT that the lighter and more aerodynamic E55 is a quicker car.
When I have the chance I'm going to run both my 05's on the same dyno one after the other... and perhaps put this argument to rest.
~ Ian
A good buddy of mine has owned a 05 E55 and a 05 CL55 and they dynoed the same which matched my 04 E55 (prior to mods
).
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From: WOT somewhere in the Bay Area
1951 Caterpiller D6
Originally Posted by IanSL55
....Personally I've never seen the logic in what's been frequently termed a "marketing" move - the E55 is hardly going to steal any sales from the SL or CL class, while understating it's HP immediately gives up a competitive edge to the BMW Audi - the real MB sales stealers.....~ Ian
