SL55/63/65/R230 AMG: World's Slowest SL65
Thread Starter
Member
Joined: May 2004
Posts: 165
Likes: 0
From: Texas
2004 E55
World's Slowest SL65
Just took my 2006 SL65 to the track last night. Best run? 12.7 @ 113 mph. Worst run? 13.4 @ 112 mph. (Both with a 2.0 60FT)
Dentsity Altitude 2000 Feet
This is from a car that used to run 11.8 @ 124 mph 18 months ago.
IAT temps were in the 120's. So it's not an intercooler issue.
I have no idea where to start looking to figure out the problem.......
Boost doesn't seem to really come on until end of 2nd gear...and then it's not much.
No codes are being thrown.
Dentsity Altitude 2000 Feet
This is from a car that used to run 11.8 @ 124 mph 18 months ago.
IAT temps were in the 120's. So it's not an intercooler issue.
I have no idea where to start looking to figure out the problem.......
Boost doesn't seem to really come on until end of 2nd gear...and then it's not much.
No codes are being thrown.
Trending Topics
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,768
Likes: 5
From: South FL & NYC
Your worst nightmare...
Sounds like you may have a bad Boost pressure sensor....sits right on top of your Y pipe going there is a metal bracket that holds it. It may not code up for it sometimes. I would also look into the airboxes make sure they are not clogged up with anything, lastly pray its not a bad turbo. The airboxes have 2 sensors make sure they are good, wires are not broken etc.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Member
Joined: May 2004
Posts: 165
Likes: 0
From: Texas
2004 E55
Banned
Joined: Nov 2010
Posts: 955
Likes: 1
2008 C63 ,2009 SL 63 AMG, 2011 SLS AMG
take it to a dyno and see how much power your are making and start from there.
12.7 is really really bad, but dont worry whatever is wrong with your car a proper tuner will identify it and fix it.
When was the last time you serviced your car? do you drive your car alot or is it garaged most of the time?
If it was garaged prior to taking it to the track, then the timing of the ECU did not adapt yet. This happens alot in MB cars and most people dont know about it. If this is what happened, I suggest you hit your car really hard for about 50 miles before taking it to the track. Then, turn the engine off, let it cool down and run your ET again
Thread Starter
Member
Joined: May 2004
Posts: 165
Likes: 0
From: Texas
2004 E55
I am in the Austin, TX area.
It's a daily driver.
It was dynoed about 2 months ago..... 515 RWHP. I should dyno it again....
It's a daily driver.
It was dynoed about 2 months ago..... 515 RWHP. I should dyno it again....
where are you located?
take it to a dyno and see how much power your are making and start from there.
12.7 is really really bad, but dont worry whatever is wrong with your car a proper tuner will identify it and fix it.
When was the last time you serviced your car? do you drive your car alot or is it garaged most of the time?
If it was garaged prior to taking it to the track, then the timing of the ECU did not adapt yet. This happens alot in MB cars and most people dont know about it. If this is what happened, I suggest you hit your car really hard for about 50 miles before taking it to the track. Then, turn the engine off, let it cool down and run your ET again
take it to a dyno and see how much power your are making and start from there.
12.7 is really really bad, but dont worry whatever is wrong with your car a proper tuner will identify it and fix it.
When was the last time you serviced your car? do you drive your car alot or is it garaged most of the time?
If it was garaged prior to taking it to the track, then the timing of the ECU did not adapt yet. This happens alot in MB cars and most people dont know about it. If this is what happened, I suggest you hit your car really hard for about 50 miles before taking it to the track. Then, turn the engine off, let it cool down and run your ET again
MBWorld Fanatic!
Joined: Nov 2007
Posts: 3,681
Likes: 39
From: San Diego
E55
Just took my 2006 SL65 to the track last night. Best run? 12.7 @ 113 mph. Worst run? 13.4 @ 112 mph. (Both with a 2.0 60FT)
Dentsity Altitude 2000 Feet
This is from a car that used to run 11.8 @ 124 mph 18 months ago.
IAT temps were in the 120's. So it's not an intercooler issue.
I have no idea where to start looking to figure out the problem.......
Boost doesn't seem to really come on until end of 2nd gear...and then it's not much.
No codes are being thrown.
Dentsity Altitude 2000 Feet
This is from a car that used to run 11.8 @ 124 mph 18 months ago.
IAT temps were in the 120's. So it's not an intercooler issue.
I have no idea where to start looking to figure out the problem.......
Boost doesn't seem to really come on until end of 2nd gear...and then it's not much.
No codes are being thrown.
Thread Starter
Member
Joined: May 2004
Posts: 165
Likes: 0
From: Texas
2004 E55
The car is currently at the shop (Moorsepeed) in Austin. We'll see what they find.
Last edited by Happy2th; Sep 17, 2011 at 11:05 AM. Reason: addition
Senior Member
Joined: Jul 2003
Posts: 460
Likes: 14
2006 SL65 ///AMG - GONE BUT NOT FORGOTTEN: 2005 E55; 2002 ML55; 2001 CLK55; 1992 BMW 850i; 1991 M5
The car is currently at the shop (Moorsepeed) in Austin. We'll see what they find.
Rich, definitely let us know what the issue was. I have no doubt you will be up and running with full power in no time.
Rich, definitely let us know what the issue was. I have no doubt you will be up and running with full power in no time.
Thread Starter
Member
Joined: May 2004
Posts: 165
Likes: 0
From: Texas
2004 E55
I hope so! It's been running slow for a long time......
If I could get this car to trap the same speed as my Lambo I'd be in Heaven!
Senior Member
Joined: Jul 2003
Posts: 460
Likes: 14
2006 SL65 ///AMG - GONE BUT NOT FORGOTTEN: 2005 E55; 2002 ML55; 2001 CLK55; 1992 BMW 850i; 1991 M5
Update?
Rich,
Did you ever get to the bottom of this? My SL65 is also feeling depressingly sluggish lately. New IC pump - properly bled - no air pockets. I have to wonder if I have a boost leak or sensor issue. Knowing what you found sure would help. Thanks!
Did you ever get to the bottom of this? My SL65 is also feeling depressingly sluggish lately. New IC pump - properly bled - no air pockets. I have to wonder if I have a boost leak or sensor issue. Knowing what you found sure would help. Thanks!
Senior Member
Joined: Jul 2003
Posts: 460
Likes: 14
2006 SL65 ///AMG - GONE BUT NOT FORGOTTEN: 2005 E55; 2002 ML55; 2001 CLK55; 1992 BMW 850i; 1991 M5
Thanks! I've got a good IC pump and Kleemann ECU/TCU tuning. So I wonder if I have a sensor issue?
Did you also discover at one time that you had a loose air inlet clamp on the boosted side of your intake plumbing that cause a loss of boost pressure? Maybe I was thinking of a post by another forum member.
Did you also discover at one time that you had a loose air inlet clamp on the boosted side of your intake plumbing that cause a loss of boost pressure? Maybe I was thinking of a post by another forum member.
Last edited by PDC; Sep 3, 2012 at 12:19 PM. Reason: P.S.
Member
Joined: Dec 2015
Posts: 146
Likes: 9
2005 SL65
Senior Member
Joined: Dec 2014
Posts: 258
Likes: 7
2003 SL55
Member
Joined: Dec 2015
Posts: 146
Likes: 9
2005 SL65
Member
Joined: Dec 2015
Posts: 146
Likes: 9
2005 SL65
