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This question is directed towards all of my fellow W204 C63 NA owners those who love to log drive data and look at it. I would like to know the following
1. What is the maximum MAF value in g/s have you observed? and at what RPM? It would be closer to red-line but what exact RPM? What was the IAT? and Ambient temp?
2. I understand for those of us who are tuned the commanded throttle at WOT is 100% but have you seen what is the maximum actual throttle opening percentage at WOT?
3. What is your location's nominal atmospheric pressure in KPa? and what is the MAP value at WOT closer to 6000 to 7000 RPM? If it drops, by how much?
Please when reply can you mention your MODS as well if it is not in your signature? I am specifically looking to compare data from people with bigger throttle bodies vs stock? and also between tuners.
Thank you for looking into this. Have a great day and stay safe y'all.
Regards
Jay
Last edited by Jaideep Singh; Jul 9, 2020 at 02:49 PM.
Damn that's unfortunate. I saw your advice on putting the E63 Y pipe. were you ever able to log some data with it? Do you have any older data files which you can dig?
Damn that's unfortunate. I saw your advice on putting the E63 Y pipe. were you ever able to log some data with it? Do you have any older data files which you can dig?
I'll look but unfortunately I have a new cell phone and had those files on it.
Basically just start logging your car and see what you get..
I remember that night i was about to hit 400 g/s when I hit the deer. Crazy I was looking at the log right after lol.
Maybe saw like 6500 rpms so had a little more to go.
I'll look but unfortunately I have a new cell phone and had those files on it.
Basically just start logging your car and see what you get..
I remember that night i was about to hit 400 g/s when I hit the deer. Crazy I was looking at the log right after lol.
Maybe saw like 6500 rpms so had a little more to go.
I have a bunch of data files. I just want to compare it with others. The biggest concern is air charge per cylinder per liter for a 5.7L Hemi which has single overhead cam is higher than our dual over head cam 6.2L which doesn't seem right to me on my car. What data logger were you using? 400g/s seems like a very high airflow which is good. Let me know if you are able to locate those files. Thanks.
Here is a few I found and the last one is on a race file with 30d timing (the pull i hit the deer)
So the best my car was doing was 305g/s at 4800 rpms compared to 260g/s at 4800 rpms on 93 Oct file. If I could of made the last pull all the way I would of broke 400 easily.
Last edited by skratch77; Jul 9, 2020 at 04:06 PM.
Here is a few I found and the last one is on a race file with 30d timing (the pull i hit the deer)
So the best my car was doing was 305g/s at 4800 rpms compared to 260g/s at 4800 rpms on 93 Oct file. If I could of made the last pull all the way I would of broke 400 easily.
Is this data file after the Y Pipe change? Do you have throttle opening percentage and MAP in the file too?
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
355g/s is the best I saw with 82’s on a standard EC V5 tune. And my car is known as a strong example.
If you just have an off-the-shelf tune, I’d say you’re spot on.
My EC dyno tune in Oct 2018 changed the power band significantly, and picked up a ton of peak tq/hp. I wouldn’t be surprised if I’m over 400g/s on my race gas file now.
355g/s is the best I saw with 82’s on a standard EC V5 tune. And my car is known as a strong example.
If you just have an off-the-shelf tune, I’d say you’re spot on.
My EC dyno tune in Oct 2018 changed the power band significantly, and picked up a ton of peak tq/hp. I wouldn’t be surprised if I’m over 400g/s on my race gas file now.
That’s what my worry is. This 360g/s max is with EC dyno tune on E85. I am just worried why it is so low.
I'm not really sure what the point of this is but maybe i'll log mine lol. What airboxes are you running i'm sure that has an impact. Header design on a N/A motor will also have an impact aswell. Fuel should really make no difference on air. If the throttle is fully open it shouldn't really play a roll. Fuel changes ignition timing, it's not forced induction so you wont see any increase in boost etc...
I'm not really sure what the point of this is but maybe i'll log mine lol. What airboxes are you running i'm sure that has an impact. Header design on a N/A motor will also have an impact aswell. Fuel should really make no difference on air. If the throttle is fully open it shouldn't really play a roll. Fuel changes ignition timing, it's not forced induction so you wont see any increase in boost etc...
My objective is to understand if my cam timing is set right and VEs are good. My plan is to understand the bottle neck of air path and work on improving it. My car’s peak I saw today was closer to 366g/s. I never thought 400+ would be possible but people are getting it. I am using ROW Air box and LTH. What Kind of MAF you see up today and what MAP drop?
i wouldn't get too caught up in what another brands engine is registering on MAF g/s. i'm sure there is some variation as well as difference as we have 2 MAF's versus 1. also, these aren't lab grade testing devices either.
i wouldn't get too caught up in what another brands engine is registering on MAF g/s. i'm sure there is some variation as well as difference as we have 2 MAF's versus 1. also, these aren't lab grade testing devices either.
Can you share some of your data files if it is okay? What kind of MAP drop do you see closer to redline? I think a DOHC engine should be able to have a higher GF Charge (per intake stroke per cylinder) as compared to a SOHC engine. This is just my thought. I have used GF Charge while we benchmarked engines back in the OEM I was working for. Anyways I would love to see your data as well if possible. Thank you for sharing all the good info on these forums.
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Question for my data logging friends
