Dyno'ed againg....
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2000 E55
Dyno'ed againg....
OK I dyno'ed my w210 e55 againg, this was a diff dyno the kind you back your vehicle to some rolls on the floor, but the results were the same 257hp and 269tq I am very dissapointed, the guy said my fuel air ratio was way too lean, the leanest he has ever seen, it was 16.3 to 1 im not to familiar with MB stuff so im asking for any advice, I dyno the car with K&N filters and without it was 250hp without and 257 with. Should I take my car to MB? It feels real slow and weak so any suggestion? 
Last edited by elboricua; Oct 2, 2004 at 06:34 PM.
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Joined: Aug 2004
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2000 E55
Hmmm i found an article thats might answer my own questions here it goes:
When it comes to fuel mileage and increased fuel efficiency, this ratio changes again. All new cars run at 14.7:1 air-fuel ratio at part throttle because this is the lowest emission point. But depending upon the engine, it's possible to run an engine at leaner mixtures like 16:1 or more at part throttle to gain mileage. The difficulty with this is that driveability and throttle response suffers at these ratios. Engine response is lazy and stumbles are commonplace. Each engine will be different, but there is fuel mileage to be gained by fine-tuning your carburetor. Don't be intimidated by these lean mixtures at part throttle. You won't burn the engine up since it is making very little horsepower at part throttle cruise--often less than 30 hp.
AND THATS WHAT IM MISSING 30HP. AND IM MAKING AROUND 24MPG.
HERES THE LINK http://www.carcraft.com/techarticles/116_0402_tune/
When it comes to fuel mileage and increased fuel efficiency, this ratio changes again. All new cars run at 14.7:1 air-fuel ratio at part throttle because this is the lowest emission point. But depending upon the engine, it's possible to run an engine at leaner mixtures like 16:1 or more at part throttle to gain mileage. The difficulty with this is that driveability and throttle response suffers at these ratios. Engine response is lazy and stumbles are commonplace. Each engine will be different, but there is fuel mileage to be gained by fine-tuning your carburetor. Don't be intimidated by these lean mixtures at part throttle. You won't burn the engine up since it is making very little horsepower at part throttle cruise--often less than 30 hp.
AND THATS WHAT IM MISSING 30HP. AND IM MAKING AROUND 24MPG.
HERES THE LINK http://www.carcraft.com/techarticles/116_0402_tune/
Last edited by elboricua; Oct 2, 2004 at 06:05 PM.
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Joined: Feb 2004
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From: City with Tall buildings!
C43/55,2k11 Volvo S60 T6AWD,2k Audi B5 S4,95 Eagle Talon Tsi AWD 500+awhp
E55 engine in C43
Originally Posted by elboricua
OK I dyno'ed my w210 e55 againg, this was a diff dyno the kind you back your vehicle to some rolls on the floor, but the results were the same 257hp and 269tq I am very dissapointed, the guy said my fuel air ratio was way too lean, the leanest he has ever seen, it was 16.3 to 1 im not to familiar with MB stuff so im asking for any advice, I dyno the car with K&N filters and without it was 250hp without and 257 with. Should I take my car to MB? It feels real slow and weak so any suggestion?
Well the soft ware upgrade is next week and shows me that the stck C43 software file has my car running lean as hell.thank God the motor has not blown up.It's not pinging but we know the timing is being pulled bac some to protect the motor.MB and Bosch engineering on top of things again.
It's not compensating.We will be inputing a modded E55 file into the ECU chip.270whp and 286.71 ftlbs.tq in the high 14's a/f is much too lean.We will have the a/f in the low to mid 13's after the flash.Stck NA E55 runs pig rich at mid to high 11's A/F.There is one run where my car actually hits 15.6 ouch!Car should theoretically pick up at least 20-40whp and more tq.I will probably change the air mass as well.I can imagine what the car will run like after the mapping etc.It's no slouch as of now but we know it will run better. Thanx to George and Brian of ICS performance Connecticut.www.icsperformance.com.
Last edited by ProjectC55; Feb 12, 2005 at 05:50 PM.
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Posts: 235
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2002 ML55, 2006 C6 Z06
Originally Posted by elboricua
OK I dyno'ed my w210 e55 againg, this was a diff dyno the kind you back your vehicle to some rolls on the floor, but the results were the same 257hp and 269tq I am very dissapointed, the guy said my fuel air ratio was way too lean, the leanest he has ever seen, it was 16.3 to 1 im not to familiar with MB stuff so im asking for any advice, I dyno the car with K&N filters and without it was 250hp without and 257 with. Should I take my car to MB? It feels real slow and weak so any suggestion?
Member
Joined: May 2002
Posts: 235
Likes: 1
2002 ML55, 2006 C6 Z06
Originally Posted by elboricua
Hmmm i found an article thats might answer my own questions here it goes:
When it comes to fuel mileage and increased fuel efficiency, this ratio changes again. All new cars run at 14.7:1 air-fuel ratio at part throttle because this is the lowest emission point. But depending upon the engine, it's possible to run an engine at leaner mixtures like 16:1 or more at part throttle to gain mileage. The difficulty with this is that driveability and throttle response suffers at these ratios. Engine response is lazy and stumbles are commonplace. Each engine will be different, but there is fuel mileage to be gained by fine-tuning your carburetor. Don't be intimidated by these lean mixtures at part throttle. You won't burn the engine up since it is making very little horsepower at part throttle cruise--often less than 30 hp.
AND THATS WHAT IM MISSING 30HP. AND IM MAKING AROUND 24MPG.
HERES THE LINK http://www.carcraft.com/techarticles/116_0402_tune/
When it comes to fuel mileage and increased fuel efficiency, this ratio changes again. All new cars run at 14.7:1 air-fuel ratio at part throttle because this is the lowest emission point. But depending upon the engine, it's possible to run an engine at leaner mixtures like 16:1 or more at part throttle to gain mileage. The difficulty with this is that driveability and throttle response suffers at these ratios. Engine response is lazy and stumbles are commonplace. Each engine will be different, but there is fuel mileage to be gained by fine-tuning your carburetor. Don't be intimidated by these lean mixtures at part throttle. You won't burn the engine up since it is making very little horsepower at part throttle cruise--often less than 30 hp.
AND THATS WHAT IM MISSING 30HP. AND IM MAKING AROUND 24MPG.
HERES THE LINK http://www.carcraft.com/techarticles/116_0402_tune/
Running at WOT (wide open throttle) as on a dyno and seeing 16:1+ is dangerous and short lived at extended rpm.
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Joined: Apr 2002
Posts: 592
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From: Sacramento
AMG C43, 1999
Do you know if your engine ECU went into Open Mode and did not stay in the Closed Loop mode during the Dyno Runs. That is very lean for wide open throttle. You can also check the duty cycle of your injectors to make sure they are not running over about 80%
But yes, if you are running these Air/Fuel ratios when the ECU is in Open Loop then you are going to see some pretty nice increases in Hp and torque when you get the A/F mixtures around 12.8:1 or so.
Jeff
But yes, if you are running these Air/Fuel ratios when the ECU is in Open Loop then you are going to see some pretty nice increases in Hp and torque when you get the A/F mixtures around 12.8:1 or so.
Jeff
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From: City with Tall buildings!
C43/55,2k11 Volvo S60 T6AWD,2k Audi B5 S4,95 Eagle Talon Tsi AWD 500+awhp
Originally Posted by MoTo
Carl,
Keep me updated on this issue.
Keep me updated on this issue.
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From: City with Tall buildings!
C43/55,2k11 Volvo S60 T6AWD,2k Audi B5 S4,95 Eagle Talon Tsi AWD 500+awhp
Originally Posted by BlownV8
Yep, probably a bad Mass Air Flow meter. MAF.
