S124 M113 V8 turbo Dyno session 1 @ DW TechSolutions
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- เผยแพร่เมื่อ 7 ก.พ. 2025
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S124 M113 V8 turbo Dyno session 1 @ DW TechSolutions
We had a long day with the first part of the rev range very good results but after 4500RPM less results. To begin with i use as a base fuel 95octane. this a 95 octane rating with E10 at the moment i measure 8.8% ethanol in the fuel. This fuel is the lowest octane rating you can buy. Reason to use this fuel is that if i want to use this car for a roadtrip or else. That i can get everywhere this fuel. 98 octane is not for sale at every fuel station in the netherlands. And because im also want to run flexfuel this is for me the best starting point.
Below in the dyno graph we had a peak boost of 165KPA of 0.65 bar or 9,55 psi boost . i got 680NM @ 2944 RPM and 389HP at 4083RPM. But after this the the graph gets weird. after peak HP it is going a little down but the oem 5,0 in NA from should have peak HP at 5600RPM. so there should be more to get.
the thing is the car is also after 4500rpm making boost . but a little lower at the rev range around 0,6 bar or just under. but the power output is strange. Daniel from DW mentioned he had no indiation for real misfire's because the lambda value's staying normal and where not going lean. This mostly an indiation.
When we lower the boost under 0,5 the graph is getting more normall.
So i had some contact with some people around me that also have knowledge about these engine's and tuning . and i really want to thank then for support and thinking with me on this .
on some discussions we came to the conclusion that misfire could not be the case because the hardware im using can handle much more. and is proven on this . sparkplugs and igniton coils. the settings on this look al good. there are enough examples where these make over 900hp on m113k engine's
at the moment im making under 50hp per cyl and most stress is where torque is at peak and whe where already over this point.
So next. just befor ending the day we made 1 power run and let the engien cam back to idle and shut it down. i took out the spark plugs on all cylinders . on bank 2, this is driver side cylidner 5-8 the sparkplugs looking good all the same nothing to see. on bank 1 the plugs where dark brown to a little black. This could be something.
when i drove the car for the first time cruising over 100kph this ia 2000rpm and higher the engine has more vibrations. i first only suspect the engine mounts. but also @ idle there is a slight constant vibration. Now with al this in place. We suspect something the cam timing on bank 1 .
So this is for the next video. i will go investigate this and check everything i can
JMSpeedshop.com
Love to see it!! You’re pioneering on a lot of levels for the Benz/M113 platforms, it’s got a lot more in store once things are dialed
For sure. Thanks 👍
Always wanted to put 5.0 m113 into 190E as this is peak mb v8, the sound is so pure
Sounds fantastic
Thanks
Interessant om te zien en horen man! Succes met de jacht naar pk's
Dank je wel 👍
I never saw that dyno before, it looks safe so the car won't fly off rollers and crash!
Yes correct.. i prefer a hub dyno over a rolling dyno for sure
Looking forward to see what the problem is. I was expecting 450-500hp. Still the car is great.
On this fuel i expect between 400-450. But have to check some things . Will be fixed just takes some time
Still running dual spark? I would be curious to see what ignition timing you are running though I would expect a lot less under boost. Are you using lambda or AFR for the fuel mixture? Eagerly watching to see how this bottom end holds up under those power conditions. I have considered slapping a NOS kit on my build but I am worried it may not hold another 100HP with those cast pistons. Great coverage!
Lambda values for mixture. Timing is about 20 degrees on boost . But internals are forged from factory. I changed the rods. But these pistons are stronger enough
You Should use some kind of racing fuel with high octan rating to eliminate knock factor.
Good luck
Yes . That will be later. For now i want to have a base tune for low octane. I run een flex fuel sensor. So later on i will run e85. Fuel and then the ecu can adapt to how much ethanol i run in the fuel
Sounds great. Are you sure cam timing is correct?
I check today. Crank pulley marking tdc cyl 1. . that is correct tommorow im going to check the valve opening per side if the cams.are.correct
@@JMSpeedshop might be worth retarding the cam timing a few degrees? Well done, all these jobs take a lot of time to dial in. Be interesting to see what you find
@bernardwarr4187 cams have no adjustable timing . It is fixed
Mooi filmpje! Jammer dat je niet exact weet of de backpressure sensor klopt, ik denk het wel hehe, en heb je de basis timing uit geflitst? Of dat dus klopt? Voor de rest mooi werk, en misschien dan toch uitlaat klepveren upgraden.
Ja ga de sensor controleren maar die druk zal wel kloppen . Onsteking basis is uitgeflits. Maar ga dit nogmaals allemaal controleren . Klepveren upgrade wil ik zeker doen . Maar uit de ervaring van anderen komt dit pas ter sprake bij hogere drukken
I do simmilar power with stock m112 with hx35 and single tfsi coils. Maybe too restricted turbo msnifolds or intake?
I suspect combination of back pressure and floating valves
Ik lees een hoop in het commentaar wat hier gegeven is en ik heb er zelf weinig verstand van maar ik luister naar het blok (en de turbo) en de turbo klinkt niet ''vol'' genoeg''; krijgt dat ding voldoende verse lucht (lek o.d.)?
En ik ga er vanuit dat jij echt wel alles 3 keer nakijkt eer je het vastzet en aanschroeft maar is dit blok toevallig 1 met ACC? Dit was indertijd een optie op de 5.0 modellen en dat verklaart misschien wel de onevenredige verbranding met de bougies?
Als ik voor een probleem sta probeer ik eerst de meest makkelijke of simpele oplossingen na te kijken voordat ik de moeilijke zaken naga, hopelijk is het iets simpels. 390pk is al goed trouwens en zeker met die Nm (650??)
Dit blok heeft ZAS. Cylinder uitschakeling dus de nokkenassen zijn links en rechts niet gelijk turbodruk blijft goed
I was thinking 500hp reliable
Change it to a manual transmission, the engine deserves it!
😎
Which turbo and back housing are you using?
Gtx3582R gen 2. 1.01 A/R. Exhaust housing
@JMSpeedshop assumming your hp readings are @wheels im sure you said 390hp ish
Thst turbo may be a bit small
Garrett only recommended up to 4.5l
What AFR are you at?
Think it also said exhaust temps were high
@johntosh6146 this crank hp . And yes turbo is to small i think afr is .81
@JMSpeedshop 0.81 is in the ball park nothing to worry about there although you may need to add a bit more to counter the E10 but I doubt it will make much difference
@johntosh6146 i think the problem is back pressure and valve float
I have the same problem. +0.4 bar boost my crankshaft sensor start to missing teeth over 4500rpm. I can run 1.5bar boost and under 4500rpm it pulls like hell, over 4500rpm no power just missfire. Maxxecu m113 turbo
But we had no indication misfires . Lambda values staying stable .
I didn't have any missfire code either
@opelgarage6945 we had also no other indications like lean mix or no boost. He we still had boost and exhaust temp. So i think it is valve floating