theturkster

hey guys

Did my first dyno ever today and this is what they gave me. do these numbers look right to you guys? 2012 coupe performance package i have a ECU tune and akrapovic cat back.

_AMG_

Seems about right.
I got 418RWHP on Dyno Dynamics (This is a low reading dyno) with the OE Tune and MBH X pipe only.

I am Jeff

Your numbers look fine....but one can get those exact same numbers with either a tune or the p31 package. Now the question is, what exactly did you gain from tuning your p31 car?

propain

That is a low for an uncorrected Dyno on a Dynojet. If that was a mustang dyno fine. I would do a few more pulls for a good baseline number.

jacob502

This is very low. Which tune do you have?

By the way....your smoothing is set to 4

and it is uncorrected

if it was SAE corrected and a smoothing of 5 your numbers would be even lower.

Sorry, but you have a bad tune. A stock P31 should without a tune dynos better than your car

one more thing. what is the factor used on this dyno?

Sirex63

Check his sign.

There must be something weird. Doesn't he have a C63 coupe ?

jacob502

I just read your dyno conditions. Humidity is @ 42% temperature is @ 79F with a correction factor of 1.00.


I swear to god if that was my car I would be smacking my head on the wall and have my tuner answer some serious questions

jacob502

Seriously, NO COMMENT

someone is not being told the whole truth here

c63edition1

the turkster .. ana kuwaiti living in DC, studying here .. shift sayartik on Gforce , preeetttyy .. are they doing the work on it ?? i noticed the pic in your sig is in gulf run, then when i paid close attention, realized it did have kuwaiti plates !! maybe you'll give me a ride when im back home LOL (Y)

lunarx

You need to compare to other cars on that same dyno. There is no other way to qualify those numbers. Ask the shop to overlay some comparable graphs from other cars.

theturkster

im going to assume that the guys who did it didn't know what they were doing. ill take the car to another place with the same dyno and compare numbers. will try to get it done in the next day or two.

Thanks 7aboob min thokik. Good luck in school buddy ow when your back home shoot me a massage and ill be more then happy to take you on a ride.

Dads C63

What is the temp where you are?? Sometimnes the dyno temp and humidity aren't correct.

You also have to remember that you are running a header tune without the headers so its very rich and the numbers will come up once the headers are installed. Hang in there and be patient. You'll have the power soon enough.

c63edition1

REALLY HOT :P .. in the summers up to 120F no joke .. nowadays around 80-90 .. guessing .. haa shrayik ??

theturkster

lo3a. it sure can get hot around here

Honestly, i dont think its the temp. there was like four AC's running and they had a big A$$ fan running. i just think the guy who did it didnt know what he was doing. he didnt know how to take the car into dyno mode. he also didnt know at which gear to do the run.... that was why i asked for input.

im gona try a few other dyno's and take an average. ill keep you guys posted

xtyper

The numbers look quite low to me given your mods and being uncorrected on a dynojet in those conditions. I would have expected something closer to 440whp.

Also, not sure I agree with Keith about the header tune causing it to run rich since your AFR curve looks spot on tapering to 12.0 at redline. I suppose you might want to go 0.5 points leaner, but I doubt that would close all of the gap.

Merc63

Man you are running a LT header tune without the headers?? lol

Why would you even dyno the car???

I am going to get a Weistec super charger tune with no blower then dyno my car and wonder why the numbers are low... Really??


Dyno's are only good for comparing mods on the same day... Go to the track...

I ran my car on a Dyno with a Renntech 510hp tune and I got 363HP....That's 442 Crank HP.. Thats what the car is stock.. So IF I listened to a guy like Jacob, Id be smashing my head into the wall and *****ing at my tuner for no reason.. Because the next day I went to the track and run 119mph... up 4-5mph from my best stock time and right on par with a 4000lbs car running about 500hp.

theturkster

why would anyone dyno a car? i ran a dyno personally for one reason to have a base point of where the car is. plus headers tune or not i should see some bigger numbers over stock. im not here to argue if the tune is good or bad i just want to know what could be the reasons behind it.

I am Jeff

If you baselined your car, then you should be comparing your tuned dyno runfile against your baseline dyno. The dyno runfile you posted up is about the HP numbers a stock p31 car will post up. If you had performed the baseline, you would know immediately, whether or not the tune did anything for your car.

Merc63

Exactly.


So if you wanted a base point like you say, then why didn't you do exactly that when the car was stock?

The reason behind it if you read and listened to my post is dynos suck and take your car to the track. My dyno numbers blow, but my track numbers were spot on.. Reasoning behind it?? Who knows.

I know that they dynoed a SL63 and he was 2hp higher than me.. So we are both putting out the same hp and a SL63 is rated for 510hp ish.. So my tune was bang on and the guys dyno is not calibrated right.

jacob502

Well, I guess you did not need my advice and you already switched to OEtuning.

and by the way, Which dyno were you making your runs on? (seems a dynamics dynomometer to me)

I'm just saying I know about dynojets a bit. and with his factors and conditions the numbers are low. Any person who understands the dynamics of a dynojet would agree with me.

Good luck.

jacob502

+1

even with the header tune. The ECU will adjust itself to the necessary ignition and eliminate knocking. NO Problem! I had that issue once.

Merc63

Not sure what Dyno it was... But like this guy I was choked at first. Then after a trip to the track, it all made sense...


I never ran a MHP tune before. Just renntech and now OE header file. There was too many things going on with MHP when I got the tune so I just went with OE... Otherwise I probably would have tried his tune as its been working good for other guys.

I don't care who's behind the product as long as it performs like advertised.

jacob502

Thats is correct. The best thing to do is to dyno the car before and after a single mod to see if the gains are intact. When someone comes up and posts a dyno graph of a tuned P31 2012 C63 on a dynojet uncorrected and a smoothing of 4 making 410HP, I seriously think something is wrong.


Oh and by the way, When yoiu said that an SL63 made 2hp more than you did, I can say that there was something wrong with your tune.

The SL63's are known to dyno less than C63's runing with the same crank number due the MCT transmission wet clutch sucking up more horsepower.

The drivetrain loss on the MCT is more than that of a dual clutch at about %5-6
The SL63 US spec is rated @ 518 HP.


I understand the OP also has the same MCT transmission. Still his numbers are low for the factors and conditions given. My SL63 dynoed 465rwhp on more conservative conditions when it was naturally aspirated, I was runinin with an SAE correction and a smoothing of 5, check it out (by the way look at how small the fan in front of my car is):

SLS Qatar

Bro,

This is the difference between a real tune......and a BS tune

vessproms

So stock vs stock SL63 makes less rwhp then c63?