[W126 Coupe] 560 SEC cracked engine block . . . DeturnedEngines?

[Barry Corno]

Henric,

    I agree on the boost in acceleration.

Barry

________________________________

From: mbcoupes-bounces at mbcoupes.com
[mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Henric
Sent: Tuesday, November 09, 2010 9:24 AM
To: Mercedes Coupes Mailing Lists
Subject: Re: [W126 Coupe] 560 SEC cracked engine block . . .
DeturnedEngines?

 

Currently I have 2.82 MB in W126 sedan and 3.06 GT in the W126 coupe.
Both perform flawlessly and the boost in acceleration at all speeds is
wonderfully welcome.  I have not gauged the loss in MPG but the
drivability trumps the negligible loss of economy.

 

-h

 

 

On Nov 9, 2010, at 8:57 AM, Ernie Stephens wrote:





Barry,

How has this affected your gas mileage?

Ernie

	----- Original Message -----

	From: Barry Corno <mailto:bc at unitedsalad.com> 

	To: Mercedes Coupes Mailing Lists <mailto:mbcoupes at mbcoupes.com>


	Sent: Tuesday, November 09, 2010 6:05 AM

	Subject: Re: [W126 Coupe] 560 SEC cracked engine block . . .
DeturnedEngines?

	 

	Ernie,

	  I exchanged my rear end from 248's to 307's  big difference.

	 

	B.C.

	
________________________________


	From: mbcoupes-bounces at mbcoupes.com
[mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Ernie Stephens
	Sent: Monday, November 08, 2010 6:52 PM
	To: Mercedes Coupes Mailing Lists
	Subject: Re: [W126 Coupe] 560 SEC cracked engine block . . .
DeturnedEngines?

	 

	Thanks Axel, I'll check that switch and wiring.  As for the rest
of it, I might take the car into a muffler shop and be happy enough with
what they can do.

	 

	Thanks again,

	Ernie

		----- Original Message -----

		From: Axel Wulff <mailto:axelwulff at hotmail.com> 

		To: mbcoupes at mbcoupes.com

		Sent: Monday, November 08, 2010 7:31 PM

		Subject: Re: [W126 Coupe] 560 SEC cracked engine block .
. . Deturned Engines?

		 

		Hey Ernie,
		 
		Yes, the North American engines were seriously de-tuned
compared to their Euro brethren.
		 
		The US 5.6L M117 V8 put out only 238 hp while the Euro
ECE engine was rated at 300 hp.
		 
		Getting more power out of the US engine is very
difficult as the pistons, camshafts, fuel distributor, exhaust, etc.,
would have to be swapped out.
		 
		Your best option on a US engine is to change the
differential. Changing out the US exhaust system can add about 10 hp,
but other than that......
		 
		Have you checked out your kick-down switch?
		There is a switch underneath the accelerator pedal and
your transmission should downshift when it engages. If it doesn't, the
problem may be as simple as a disconnected wire.
		
		Regards,
		Axel J. Wulff
		610-731-5453 Cellular
		610-572-4611 Home
		
		
		
		 

		
________________________________


		From: stevetsg at msn.com
		To: mbcoupes at mbcoupes.com
		Date: Sun, 7 Nov 2010 21:20:43 -0700
		Subject: Re: [W126 Coupe] 560 SEC cracked engine block .
. . Deturned Engines?

		Axel,

		 

		If I understand what you're saying, the M117 has been
detuned for the USA market?  That would explain why performance is
somewhat unimpressive.  I have a hunch that that there is another 15% to
25%  of thrust just waiting to be unleashed hiding under the hood.

		 

		There was a time when I could floor the pedal and I'd
get a boost as if it had been kicked down into passing gear.   But even
then it didn't seem right; there was a 2 to 3 sec delay before that
boost kicked in.  I'm not into flooring the pedal but it is nice to know
that you have the extra power available if you need it.  It seems to me
that I lost that passing gear feature when components of my air
conditioner were removed and replaced.  Have you or anyone else reading
this ever experienced anything like this? 

		 

		Ernie

			I

  

 

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