Mercedes-Benz Forum banner

I have the chance to do 3 dyno runs for $50 on my m103

362 Views 8 Replies 4 Participants Last post by  Fencingmadman
1991 300e m103.983

What should I change? I'm going to do one as it is now, one where I seafoam and run a can of intake cleaner through my 340k mile motor, and I'll probably put in a higher value resistor to advance the Timing. Any other ideas?
1 - 4 of 9 Posts
Dumb and stupid.

Putting a 30+ year old engine on the dyno is the perfect recipe to end up with a vehicle that has a $50 scrap value.
I fail to see how running a healthy engine at the load and redline it was engineered for is going to blow it up, all the bearings are solid and it will sit at 125 mph quite comfortably. I've dynoed small blocks from the 60s with far more miles and they lived.
Congrats on the 340k miles.
You can do as you like.
Your ride, your choice.
No need to ask members for permission.

However, if you really believe the combo of seafoam is going to make the difference and/or along with, changing the R16 resistor....

And this one is a 20yo thread too.

Not much else in m103 m104 power upgrades, unless you add another few 00s to the 50 you have.
But then, for that kind of money, you can get yourself a nice replacement MB, latter model and fast(er).
Better $ spent gathering a few acorns for this ride, imo.
Honestly some of the reason I want to try changing the resistor is some people say it helps and some say it doesn't. I'd like to get a definitive answer once and for all.

I run a small YouTube channel so id also think it would be cool to actually see if seafoam makes a difference.

Plus even if nothing happens it's just 50 bucks going to a highschools auto program so good cause anyway.
This should be interesting. A 340k mi motor at redline.
Be sure to post the video.
It'll live, it gets redlined daily anyway.
And it has been its whole life as I know the previous 2 owners were harder on it than me...
1 - 4 of 9 Posts