How can I increase the 560SEL 1989 performance? - PeachParts Mercedes-Benz Forum

jhodg5ck · #1 03-04-2006, 10:04 AM

the Only cheap means of getting more power from your car (once everything is in proper order) is replace the spring loaded portion of the throttle linkage w/ a solid bit, remove the ignition reference resistor (takes initial timing from 3 to 12 degrees initial) and drop in a K&N (I find the 560's a bit starved for air on the dyno).

After that it gets expensive, i.e. exhaust, cams, head work, forced induction etc, etc...

Jonathan

Hit Man X · #2 03-04-2006, 03:54 PM

Quote:

Originally Posted by jhodg5ck

the Only cheap means of getting more power from your car (once everything is in proper order) is replace the spring loaded portion of the throttle linkage w/ a solid bit, remove the ignition reference resistor (takes initial timing from 3 to 12 degrees initial) and drop in a K&N (I find the 560's a bit starved for air on the dyno).

After that it gets expensive, i.e. exhaust, cams, head work, forced induction etc, etc...

Jonathan

Does the same go for 420s for the resistor and throttle linkage?

I know it will not be a rocket but increasing timing on my F150 from 10° BTDC to 15° picked up around 12-13rwhp alone. So if I can bump that and increase WOT fueling I could potentially see an easy 25-30rwhp no sweat.

jhodg5ck · #3 03-04-2006, 04:06 PM

Well, you won't see That much of an increase, fixing the linkage/resistor/air filter on my 560SEC w/ fresh heads and Euro Tri-Y manifolds (check my page for pics) I found about 9 RWHP.

That aside, yes these items will work on your 420

Jonathan

Hit Man X · #4 03-04-2006, 04:15 PM

Ah as I figured they're pretty much maxed out stock minus the WOT fueling end. My Ford ran lean stock (~15.2:1!) and only had around 30° of total timing.

Did you dyno the resistor change to see if the car picked up any significant gains in the midrange from 2000-4000?

jhodg5ck · #5 03-04-2006, 04:56 PM

Well, the resistor did wake things up nicely up to 2500, more power sooner etc..after that timing is no longer controlled by the reference resistor. I didn't have data acq. on during these runs (car will be set up for 2 O2 sensors somewhere down the road) so I don't know what A/F ratio I was running.

I've also found giving the EHA a turn one flat to the right helps a touch as well.

Jonathan

Hit Man X · #6 03-04-2006, 04:58 PM

Quote:

Originally Posted by jhodg5ck

Well, the resistor did wake things up nicely up to 2500, more power sooner etc..after that timing is no longer controlled by the reference resistor. I didn't have data acq. on during these runs (car will be set up for 2 O2 sensors somewhere down the road) so I don't know what A/F ratio I was running.

I've also found giving the EHA a turn one flat to the right helps a touch as well.

Jonathan

Excellent, thanks for the info.

jhodg5ck · #7 03-04-2006, 05:01 PM

My pleasure..! Good luck w/ it.. I take it you know where the resistor is? Right next to the fuse box towards the passenger side..bunle 'o wires.. Will be a small plastic square w/ 2481 in white number..big giveaway is the electrical tape around the bottom of it.

Jonathan

E150GT · #8 03-05-2008, 05:04 PM

Quote:

Originally Posted by jhodg5ck

the Only cheap means of getting more power from your car (once everything is in proper order) is replace the spring loaded portion of the throttle linkage w/ a solid bit, remove the ignition reference resistor (takes initial timing from 3 to 12 degrees initial) and drop in a K&N (I find the 560's a bit starved for air on the dyno).

After that it gets expensive, i.e. exhaust, cams, head work, forced induction etc, etc...

Jonathan

I know this is an old thread, but on the throttle spring, do I replace that with one of the rods like the rest of the linkage? What is the benefit?

jhodg5ck · #9 03-05-2008, 07:22 PM

Quote:

Originally Posted by E150GT

I know this is an old thread, but on the throttle spring, do I replace that with one of the rods like the rest of the linkage? What is the benefit?

Similar, if you need the part let me know.

Benefit is Full Throttle!

Jonathan

E150GT · #10 03-06-2008, 01:29 PM

As far as the ignition timing goes, the sticker in the car states 12 degrees advance stock. Mine is at 17 degrees, so would I be gaining power or losing it at 17 degrees advance?

jhodg5ck · #11 03-06-2008, 09:55 PM

@ 17 degrees initial you'll be losing power..you should bring the RPM's up to 3500 or so and see what you're getting for total advance.

I'm feel a lot better w/ 11-13 initial.

Jonathan

E150GT · #12 03-11-2008, 01:30 PM

Jonathan,
I am intersted in the part. I sent a PM, but I suppose you didn't get it. Let me know how and how much please. Thanks