[W126 Coupe] Turbo/supercharger

[Iain Gunn]

Jonathan, If you intend to sell your cams, I won't get too excited about not releasing any information. Once sold, cams are relatively easy to reverse engineer. One of the tricks than is NOT easy to reverse engineer is how you dealt with the critical area of heat treating. If you've done a good job with this you've got a winner. I've often wondered why no one has done anything with the cam design for 560's.
    Also you would not have to release the actual specs of the cam, but the torque/HP specs at what rpm if you had them dynoed.
                                                                                Cheers, Iain
  ----- Original Message ----- 
  From: Jonathan 
  To: Mercedes Coupes Mailing Lists 
  Sent: Monday, August 06, 2007 10:26 AM
  Subject: Re: [W126 Coupe] Turbo/supercharger


  Hello Alex,

  I do have cams, I've started producing them in the last 1/2 year after debating what specs to use for some time.   Sorry to say I'm none to keen on releasing the #'s, as it took me considerable time/effort to get where I am (Starting w/ AMG cams etc, etc..).

  Jonathan


  Alexander Hochhausl wrote: 
    Hi Jonathan,



    Good points you make - yes, I scratch my head too when I look at the exhaust. You mention you have some after market cams - do you have the source/specs on them - I haven't seen anything for the 560. Thanks.



    -----Original Message-----
    From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Jonathan
    Sent: Sunday, August 05, 2007 11:06 AM
    To: Mercedes Coupes Mailing Lists
    Subject: Re: [W126 Coupe] Turbo/supercharger





    Alexander Hochhausl wrote: 

    "Finally - be careful when changing exhaust to headers - you loose a lot more bottom end torque (where you do most of your driving) than you gain in top end HP. The whole system has to be balanced and match. Exhaust system design is actually a very complex and interesting. You can gain or loose 10-20% based on the design and free-flow is not always a positive. Even when it is, geometry (tube diameters/lengths, even firing order greatly influences the output."

    I have to comment on my experience with headers/cast tri y's..the two cars I know that are header equipped not only make more up top but are making more power sooner.
     The US exhaust system is one of the worst designs ever to make it on a production car.  Just allowing this car to breathe properly had netted me 20 RWHP and 12 ft/lbs.  I'll have another car running AMG spec headers in the next few months and will of course post my results here.

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    "Typically you'd only go to headers if you upgraded to high flow cams and heads and you are doing all your driving above 4K (like on a track). Most people I know don't run their car on a track - otherwise it's a waste. That may be why nothing much is happening below 4K."

      I've been running a hot cam in one of my cars and have to say the top end rush is addictive..  The only way I really notice a loss of low end is by jumping back and forth from a stock 560 and back into my built car.  She still pulls well down low, but instead of getting sluggish over 4K everything takes on a whole new urgency.  Makes me smile every day, many times a day;-)

    Jonathan
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-- Blue Ridge MercedesOffering Enthusiast Service, Restoration and Modification.Providing quality parts to discriminating customers in all parts of the world.Located in the Greater Atlanta area.http://www.blueridgemb.com 1996 S600 Euro "Scharnhorst"1991 560 SEC Full Euro ECE1991 560 SEC 226Hp/271ft/lbs1989 560 SEC AMG (N.A. Conversion 250/297)1987 560 SEC 1986 560 SEL 6.0L 32V AMG1985 300 CD (for sale)1980 280 SE Euro1986 560 SEC (parts)----------------------------------------------------------------------------
The MB Coupes Website!
W126 SEC Mailing List
Postings remain property of MB Coupes, L.L.C.


-- 
Blue Ridge Mercedes
Offering Enthusiast Service, Restoration and Modification.
Providing quality parts to discriminating customers in all parts of the world.
Located in the Greater Atlanta area.
http://www.blueridgemb.com

1996 S600 Euro "Scharnhorst"
1991 560 SEC Full Euro ECE
1991 560 SEC 226Hp/271ft/lbs
1989 560 SEC AMG (N.A. Conversion 250/297)
1987 560 SEC 
1986 560 SEL 6.0L 32V AMG
1985 300 CD (for sale)
1980 280 SE Euro
1986 560 SEC (parts)


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  The MB Coupes Website!
  W126 SEC Mailing List
  Postings remain property of MB Coupes, L.L.C.


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