So anyone with a 90mm come on in
07-09-2019, 11:37 PM
#76
Junior Member
Skeptical me is skeptical. If it's a matter of tuning a fall-back fuel map, I have two thoughts:
1. Anyone with the issue running higher flow injectors would see the opposite of the lean conditions people are reporting due to the increase in fuel flow per injector pulse. Anyone who's forgotten to save their injector scaling tables before writing the ECU would know/experience this.
2. The people offering tunes for these cars aren't retarded - they would find the fall-back map and tune it if it meant selling more tunes.
The only viable "it's the ECU's fault" proposition I have heard is that there is no way to alter the factory flow scaling for larger throttle bodies. Normally, an ECU expects a certain volume of air per "x" volts sent to the throttle body servo (throttle position). Obviously when you enlarge the inlet, the volume of air introduced to the motor increases exponentially at any given throttle percentage relative to the flow of the original throttle body. However, and I think this is how the tuners are doing it, you COULD accommodate for the increase in air volume within the fuel map. After all, in tuning suites like HPTuners, all the throttle body scaler does is act as a multiplier within your primary fuel map - along with some other stuff.
1. Anyone with the issue running higher flow injectors would see the opposite of the lean conditions people are reporting due to the increase in fuel flow per injector pulse. Anyone who's forgotten to save their injector scaling tables before writing the ECU would know/experience this.
2. The people offering tunes for these cars aren't retarded - they would find the fall-back map and tune it if it meant selling more tunes.
The only viable "it's the ECU's fault" proposition I have heard is that there is no way to alter the factory flow scaling for larger throttle bodies. Normally, an ECU expects a certain volume of air per "x" volts sent to the throttle body servo (throttle position). Obviously when you enlarge the inlet, the volume of air introduced to the motor increases exponentially at any given throttle percentage relative to the flow of the original throttle body. However, and I think this is how the tuners are doing it, you COULD accommodate for the increase in air volume within the fuel map. After all, in tuning suites like HPTuners, all the throttle body scaler does is act as a multiplier within your primary fuel map - along with some other stuff.
Last edited by CFD; 07-09-2019 at 11:46 PM.
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Crissus (07-21-2019)
07-10-2019, 09:59 AM
#77
MBWorld Fanatic!
Its a tuning issue however some ecu goto some alternate map when the car is cruising and the hiccup is engaged and then they are in a lean mode until the key is cycled
some have popped their motors because they have not had the proper logging equipment and didn’t notice how lean they went, usually around 17AFR, as far as tuners making money fixing this issue on a small percentage of cars, they have all tried but imo it would take hours to fix and have the car on site and make it trigger, not so easy to do
some have popped their motors because they have not had the proper logging equipment and didn’t notice how lean they went, usually around 17AFR, as far as tuners making money fixing this issue on a small percentage of cars, they have all tried but imo it would take hours to fix and have the car on site and make it trigger, not so easy to do
Last edited by Hulk; 07-10-2019 at 10:02 AM.
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Crissus (07-21-2019)
07-10-2019, 04:08 PM
#80
Super Member
Thread Starter
07-10-2019, 06:14 PM
#82
Super Member
Thread Starter
07-10-2019, 06:18 PM
#83
MBWorld Fanatic!
I wouldn’t do this remotely especially if you don’t have good logging equipment like zeitronix, although their tunes can be done remotely without ,you are paying top dollar so do it right
give them a call
give them a call
07-10-2019, 06:25 PM
#84
Super Member
Thread Starter
Wow wow wow sorry but that was the biggest waste of my time brother holy crap talk about ****ty customer service. So called the sec u said to give them a try. Quote .... we do NOT tune anything with stacked pullies ..... and he kept repeating something about not getting the parts to marry i said i needed an aggressive tune due to stacked pullies, longtubes, and listed my mods and he said impossible cant get the parts to marry. Guy had a thick accent, and i told him i was tryin to install an 82mm tb and tell him i was experiencing the hiccup and seriously the guy started to explain it wasnt a good idea cus of cavitation and the front bearing will come off .... i was like huh that has nothing to do with an 82mm. An so i just ended up hanging up on him. So i dont know whay they wouldnt do a custom tune but this guy seemed like a moron maybe im wrong. He said they have only 1 tune for the e55
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Crissus (07-21-2019)
07-12-2019, 10:54 PM
#90
MBWorld Fanatic!
Here is the part I can not wrap my head around with the "hiccup" . These engines are speed density...no mass air, so I can understand that the ECU is calibrated/calculated to "see" certain air flow with in it's parameters. But.... how is this all possible when you will at any given point have the compressor kick on and completely change the air flow characteristics of the the incoming air from vacuum to pressure and a miixture of the air flow at low engine rpm. Again a mass air engine , sure, but Speed Density, I can not see it. Can't see how the engineers some how calculated all the variables for the ECU to see this in two totally different situations mixed together with boost/vacuum. Now you add a bigger throttle body and some ECU's can not adapt to this but I can crank up the boost to 17lb,s and it does not care. Strange !!
Will fire up my 80mm install Saturday and see how it runs. Can't drive it due to Nitrous and trunk tank not finished but eager to know if it will have the same idle characteristics !!!
Will fire up my 80mm install Saturday and see how it runs. Can't drive it due to Nitrous and trunk tank not finished but eager to know if it will have the same idle characteristics !!!
Last edited by SICAMG; 07-12-2019 at 10:58 PM.
07-13-2019, 12:18 AM
#91
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2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
Thanks guys i KNOW its not air leaks i sealed mine perfect several times even smoke tested it with 3 different smokers an all showed no leaks. I too think its something to do with the ecu wish someone would figure it out cus a bigger TB sure would open up for some nice gains. I may get an 80mm an have it opened up to its max an just use that i dont hear many probs with the 80mm
07-13-2019, 11:33 AM
#93
Super Member
Thread Starter
07-13-2019, 07:01 PM
#95
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