[W126 Coupe] REALLY cheap performance upgrade!

[Steve Nervig]

On Oct 1, 2005, at 8:33 PM, Mike R. wrote:

> I found out something neat at the MBCA technical session earlier  
> this week. It turns out that both my 560SEC and 560SEL have a  
> spring loaded element in the throttle linkage. With the throttle  
> pedal all the way to the floor, I could gently push down on the  
> linkage going down to the butterfly and it moved about ¼” further.  
> That won’t open up the butterfly an appreciable amount, but it is  
> enough to show that I was NOT getting the full-throttle switch on  
> the throttle body that tells the system to fully richen up the  
> mixture.
>
>
>
> The first picture shows the original, spring-loaded link element,  
> the threaded rod that took its place, and the 8mm nut. The second  
> picture shows the new link installed just behind the fuel distributor.
>
>
>
> Remove the original link. Clamp the ball-joint (heim end?) in a  
> vise and on one end loosen the 8mm nut, and on the other end remove  
> the link barrel from the ball joint. The link barrel end has a  
> threaded insert about ¾” long that attaches the ball joint to the  
> link. Both ball-joints should be off now, with the 8mm nut. The ¾”  
> threaded insert should be removed from the ball-joint and threaded  
> back into the barrel just so it’s not lost.
>
>
>
> Thread the new nut and the nut from the barrel onto the threaded  
> rod, then the ball-joints. With one ball-joint and nut tight,  
> install the new link and see if full throttle pushes the rod  
> leading down to the butterfly all the way down. Once the length on  
> the new link is correct, tighten it all down and put the air  
> cleaner back on.
>
>
>
> I found that a full throttle run with a downshift seems to have  
> noticeably more power.
>
>
>
> The power feels a little better when it’s a full throttle  
> acceleration without the downshift, but it shows up better (full  
> rich, finally) when it downshifts and heads for red line – big  
> difference!
>
>
>
> Steel threaded rod, M5-0,8 140mm long
>
> One more 8mm nut, M5-0,8
>
>
>
> 8mm wrench
>
> 11 mm wrench
>
>
>
>
>
> Later,
>
> Mike R.

Mike, are you saying that the original barrel link can't be  
lengthened (adjusted) enough to get WOT?

Steve


--
If you don't know where you're going,
any road will do.

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