Absolutely airflow is such an important thing when it comes to tuning from heat generated to making sure it goes to the right places, unfortunately I can't believe I over looked this for so long. It really was one of those moments where I just glanced at the manifold and put the puzzle together instantly. But on the new build I would very much like a forward facing plenum but again it's working out volume and flow to make sure we don't repeat this 👍
Very nice job, thank you so much for your sharing. I have some tip for you. Friend of mine had problem with boost and found out, that exhaust valves failed to close- valve floating, so he bought harder valve springs. this may also been factor of rich mixture because of remainig exhaust gases in cylinder... I found that cdi inline engines should have dual valve springs that fits to m111 and m104, brcause m111 have that weird shaped single springs. Can you do video of comparison?
this is absolutely something I can looks into, there is a version of the M104 I believe it's the older 3.0 that uses dual valve springs from factory, Mercedes never intended these to be revvy engines so it's definitely always worth doing valve springs when wanting to rev past the stock limit. but with the Mercedes engines of this era often parts are interchangeable and you can normally find a solution to an issue from another mercedes and sometimes even BMW engines
We normally do infact that's how I tune most of my cars and bikes, reading plugs is a very important and useful skill to have when tuning they can tell you so much about how the engine is running I 100 % agree. I read plugs almost daily as a motorcycle mechanic. Unfortunately when we checked the plug prior to these as tmit was fairly short intervals before failures 🤦🤣, the plugs would look ok but as we were still road tuning the engine it was hard to make total sense of what the video engine was doing as I wasn't there all the time to check the plugs. Great advice buddy and many me included should take it 👍
There was a question mark over one of the fuel injectors prior to this but, given the throttle body orientation and the layout of the intake runners Vs the plenum volume, I feel like the plenum did play a part in the headgasket failure. But due to not having egt probes all we had was a afr which obviously doesn't tell you if one specific cylinder is having issues until it's too late.
Nice explanation of airflow dynamics in manifolds, its an often overlooked part of tuning most of the time and can contribute to or negate hp gains
Absolutely airflow is such an important thing when it comes to tuning from heat generated to making sure it goes to the right places, unfortunately I can't believe I over looked this for so long. It really was one of those moments where I just glanced at the manifold and put the puzzle together instantly. But on the new build I would very much like a forward facing plenum but again it's working out volume and flow to make sure we don't repeat this 👍
Very nice job, thank you so much for your sharing. I have some tip for you. Friend of mine had problem with boost and found out, that exhaust valves failed to close- valve floating, so he bought harder valve springs. this may also been factor of rich mixture because of remainig exhaust gases in cylinder... I found that cdi inline engines should have dual valve springs that fits to m111 and m104, brcause m111 have that weird shaped single springs. Can you do video of comparison?
this is absolutely something I can looks into, there is a version of the M104 I believe it's the older 3.0 that uses dual valve springs from factory, Mercedes never intended these to be revvy engines so it's definitely always worth doing valve springs when wanting to rev past the stock limit. but with the Mercedes engines of this era often parts are interchangeable and you can normally find a solution to an issue from another mercedes and sometimes even BMW engines
Very interesting, lesson learned cheers
Awesome thank you👍
What did the spark plugs look like. You should pull them for a reading next time you have a running engine and check them before a meltdown.
We normally do infact that's how I tune most of my cars and bikes, reading plugs is a very important and useful skill to have when tuning they can tell you so much about how the engine is running I 100 % agree. I read plugs almost daily as a motorcycle mechanic. Unfortunately when we checked the plug prior to these as tmit was fairly short intervals before failures 🤦🤣, the plugs would look ok but as we were still road tuning the engine it was hard to make total sense of what the video engine was doing as I wasn't there all the time to check the plugs. Great advice buddy and many me included should take it 👍
Like u vid mate. Really good to know stuff. Im about to buld a m111 and want about 450hp? What does Stock internals stand?
Hmmm naaaah.... Im not so sure about that... How much boost and what EGT did you have? Are you sure that injector was OK?
There was a question mark over one of the fuel injectors prior to this but, given the throttle body orientation and the layout of the intake runners Vs the plenum volume, I feel like the plenum did play a part in the headgasket failure. But due to not having egt probes all we had was a afr which obviously doesn't tell you if one specific cylinder is having issues until it's too late.