reflash without afr log!
reflash without afr log!
hi, am just wondering how accurate tuner's reflash will be if i dont have wideband to send afr log file to them? can they do a perfect reflash? r they able to figure afr from the data i give them through log file? am planing to do my reflash through mail!
not accurate at all but alot of eflash tuners will do this without it but claim everything is 'fine'. lol. i've heard alot of reviews from friends, forums and even some personal interactions w/ them... but its not very hard for them to eflash a standard bolton affair to 80% accuracy once they get a database of tunes collected. be warned, these tuners are the popular ones here. if they allow an e-tune without wideband, dont ignore the red flag. walk away.
basically most tuners will ask if i have a afr log! but if i dont they say they are able to tune!
i agree that afr is important
am really interested of hearing tuners also!
i agree that afr is important
am really interested of hearing tuners also!
Okay I am not posting this to start a flame fest, BECAUSE the best and only way to do it is with a WB. End of discussion. However you can get approximate by NB voltage but approximate on a high tuned engine is not the way to do it. Even if it was reliable it means that its not making peak power. I have enough logs that have both a WB and NB voltage as well as basemaps tuned with WB's I could guess. Any tuner will tell you its possible, but like them I would also tell you its not recommended. Even if you cant log it the only way to be accurate is to have a WB in the car and someone logging and watching the AFR's.
cliffs- No. Doing it without a WB is not the best use of your money nor is it the absolute safest way (even if possible) to do it.
cliffs- No. Doing it without a WB is not the best use of your money nor is it the absolute safest way (even if possible) to do it.
Cars that have similar mods should be able to take similar fuel maps and timing maps.
Heck, going from a 2.5" exhaust to a 3" exhaust barely effects a tune. Now, if you're trying to push the limit, then you'll need accurate A/F readings. But it's a none issue with a conservative tune,.
Heck, going from a 2.5" exhaust to a 3" exhaust barely effects a tune. Now, if you're trying to push the limit, then you'll need accurate A/F readings. But it's a none issue with a conservative tune,.
Trending Topics
It is possible to rough out a tune using the narrowband signal, but it will never be as good as a tune with a wideband. Possible, but not really recommended. If you have no other choice, a tune using the narrowband will be better than no tune (assuming it's still knock free).
mmmm!!
i was quiet sure about that but wanted to be 100%!
however am planing to install wideband b4 tuning!
is there a way they can calculate afr, from variables if u dont have wideband?
i was quiet sure about that but wanted to be 100%!
however am planing to install wideband b4 tuning!
is there a way they can calculate afr, from variables if u dont have wideband?
Evolved Member
Joined: Jan 2006
Posts: 953
Likes: 2
From: Oxfordshire
I think that if the car has a stock air intake, and only exhaust mods, then a mild tune is possible without a great risk to the engine. Remember the stock fuel maps are really rich.
For example, you can take out boost taper, raise the boost cut and maybe take out a bit of fuel up top. As long as the pre and post tune logs don't show knock it should be reasonably safe.
As to a tuner willing to do this, if he makes the owner aware of the possible problems, is the tuner doing the wrong thing? Using a WB is the best way to do it though.
MB
For example, you can take out boost taper, raise the boost cut and maybe take out a bit of fuel up top. As long as the pre and post tune logs don't show knock it should be reasonably safe.
As to a tuner willing to do this, if he makes the owner aware of the possible problems, is the tuner doing the wrong thing? Using a WB is the best way to do it though.
MB
wrt me, am installing a full tbe and i already installed wallbro255, and i have a mbc!
so i want to reflash and some said they can do it without wb! with these mods can i get a good map without afr as "burgers22" said!
bec i want to know if i have to get a wb, i will postpone my reflash to get a wb and install it else i wil directly reflash! my resources are little now concerning get a wb and reflashing at same time! so one has to wait!
wat do u think guys?
so i want to reflash and some said they can do it without wb! with these mods can i get a good map without afr as "burgers22" said!
bec i want to know if i have to get a wb, i will postpone my reflash to get a wb and install it else i wil directly reflash! my resources are little now concerning get a wb and reflashing at same time! so one has to wait!
wat do u think guys?
Evolved Member
Joined: Jan 2006
Posts: 953
Likes: 2
From: Oxfordshire
The best way is to get a flash with a WB, other wise you are paying for the flash twice.
You could, if you felt confident, take out the boost taper and raise boost cut a little yourself, but I'd only suggest doing this if using the stock intake, remember though all flashing done at your own risk. And log lots afterwards to check for knock.
MB
You could, if you felt confident, take out the boost taper and raise boost cut a little yourself, but I'd only suggest doing this if using the stock intake, remember though all flashing done at your own risk. And log lots afterwards to check for knock.
MB
For the price of a WB now it just makes sense to use it. Just like JohnBradley and TouringBubble said, you can get an o.k. tune without it, but why give up the extra hp and saftey for the small price?