Running too lean
12-03-2009, 04:31 PM
#17
Administrator
Thread Starter
Man I said it like a million times on this forum lol, Cobb AP don't work on Gulf Spec cars..
Will mostly get her chipped and call it a day
Will mostly get her chipped and call it a day
12-03-2009, 04:59 PM
#19
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12-03-2009, 05:07 PM
#20
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Thread Starter
Even if I send it to them, how are they going to tune it exactly for my car? Data-logging? Naah that's weaksauce.
Tadashi should come down to Dubai!!
Tadashi should come down to Dubai!!
12-03-2009, 05:15 PM
#22
Administrator
Thread Starter
Well not that bad, but could lead there in extreme cases.. too much unburnt air might recombust in your combustion chamber after the initial ignition basically
12-03-2009, 10:01 PM
#23
Registered User
12-04-2009, 02:16 AM
#24
Administrator
Thread Starter
I have no idea to be honest lol I got it off an interesting article on engine detonation I found while looking around
A lean fuel mixture, more air than fuel in the combustion charge, is another known detonation culprit. The lean mixture burns hotter and absorbs less heat in the process, hence EGTs rise when the mix goes lean and adding fuel drops temps. This heat can rise to where the mixture starts burning out of sequence with timing events and bam you have detonation.
12-09-2009, 03:41 PM
#25
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Thread Starter
I'm curious to know, why do breathing mods alter AF numbers in the first place.. aren't AF numbers stored in some sort of tables in the ECU.. how does adding an intake alter that? 
12-11-2009, 03:12 PM
#26
Registered User
I'm just as curious. The car "should" be able to adjust to air/fuel changes, especially when you consider that there is more oxygen in the air in winter than summer, and more at sea level than higher above. How can the ECU adapt to such changes and not adapt to intakes?
12-11-2009, 03:37 PM
#27
Registered User
simple answer would be that the intakes and exhaust provide too much air flow for the ECU to handle. remember that the ECU, while it does 'adapt', it only apadts to the RANGE it was programmed with...it only 'adapts' to the a/f on a stock air box and exhaust system. so the readings on a cold / hot day with a stock air box will be over and beyond the 'safe range' of an intake designed to manipulate the a/f for more power in the same conditions when combined with more breather mods.
if the ecu had such a broad adaptibility range...then everyone would just slap a turbo and call it a day without ever worrying about Sam's pic....LOL, i still find that funny.
if the ecu had such a broad adaptibility range...then everyone would just slap a turbo and call it a day without ever worrying about Sam's pic....LOL, i still find that funny.
12-11-2009, 04:22 PM
#28
Registered User
I see. so can dyno tuning adjust the A/F range without using a specific tuner tool such as those from Cobb or Uprev? i mean is there a universal tuning tool to do that? especially since both Cobb and Uprev don't work on GCC cars 
12-11-2009, 05:53 PM
#29
Administrator
Thread Starter
simple answer would be that the intakes and exhaust provide too much air flow for the ECU to handle. remember that the ECU, while it does 'adapt', it only apadts to the RANGE it was programmed with...it only 'adapts' to the a/f on a stock air box and exhaust system. so the readings on a cold / hot day with a stock air box will be over and beyond the 'safe range' of an intake designed to manipulate the a/f for more power in the same conditions when combined with more breather mods.
if the ecu had such a broad adaptibility range...then everyone would just slap a turbo and call it a day without ever worrying about Sam's pic....LOL, i still find that funny.
if the ecu had such a broad adaptibility range...then everyone would just slap a turbo and call it a day without ever worrying about Sam's pic....LOL, i still find that funny.
So you replace your stock intakes with ones that improve the flow and cause more air mass to flow in, why is it we have a problem? Is the MAF sensor having troubles reading the new added air? Or is the ECU having troubles obtaining that signal input from the MAF sensor?
