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Go Back   REVscene Automotive Forum > Technical Discussion > Maintenance, Engine & Driveline Tech

Maintenance, Engine & Driveline Tech This forum is brought to you by The Speed Syndicate (TSS) in Burnaby.
Discussion of maintaining your engine, transmission, differentails, rear ends, and mods associated with "driveline" parts..

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Old 06-02-2009, 10:40 AM   #1
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What is AFR tuning?

Is it Air fuel ratio tuning?
What is done to the car during this process?

I was on a nissan forum and another sentra guy mentioned getting an AFR tune done to gain more power

Does this have any negative effects?
Also where would I go to get this done?

I did a search for tuning but alot of the results involve boosted cars, mine is N/A, and probably will never be boosted
since its an auto

Sorry for my noobness
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Old 06-10-2009, 06:59 PM   #2
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i wanted to know the same thing
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Old 06-10-2009, 07:08 PM   #3
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You'd need something like Ni$$$$$? (spellilng) or something along those lines such as a standalone ECU to do this. Oh, money, and dynotime.
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Old 06-10-2009, 07:16 PM   #4
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what year nissan do u drive and what is it.
a nistune will stick a daughterboard on the ecu and allow u to remap the fuel, ignition, injectors, map, etc etc.

you'll also need a wideband o2 sensor to remap your air fuel ratio's. you can get away with a streettune through datalogging.

innovate wideband approx 250$,
nistune approx 450$.
learning how to tune properly, lots of reading (free).

you should only be making minor adjustments neways, so u can do it yourself.
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Old 06-10-2009, 08:51 PM   #5
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Personally
you'd be spending too much for any real gains
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Old 06-10-2009, 10:36 PM   #6
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Personally
you'd be spending too much for any real gains

Yeah I figured
To answer the previous question my car is an 08 Sentra SE-R

I'm not looking for huge power gains, but it was just suggested that its more worth the money to tune than to get bolt ons
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Old 06-10-2009, 10:48 PM   #7
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intake + full exhaust... then cams + tune.... good NA set up
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Old 06-11-2009, 08:29 AM   #8
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Personally
you'd be spending too much for any real gains
i'd have to disagree.. a good ecutune can realize gains everywhere as well as improvement in fuel economy and driveability.

what i don't get is people are willing to drop 6-700$ on an exhaust for 5hp, but an ecutune will give them more than that for the same price, not just that, with a programmable ecu, you can continually retune to match your modifications.

but watever tickles ur pickle
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Old 06-11-2009, 09:34 AM   #9
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i'd have to disagree.. a good ecutune can realize gains everywhere as well as improvement in fuel economy and driveability.

what i don't get is people are willing to drop 6-700$ on an exhaust for 5hp, but an ecutune will give them more than that for the same price, not just that, with a programmable ecu, you can continually retune to match your modifications.

but watever tickles ur pickle
So where would I go to get all of this done?
Currently the only "mod" i have is a tanabe axle back, I plan on getting an intake in the near future
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Old 06-11-2009, 03:24 PM   #10
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i just reread your post and realized you have a 2008 se-r.

Your options are probably limited to the standalone expensive stuff, ie Aem. The cheapest option would be a piggy back which doesn't always work as well but still can work ie. greddy emanage ultimate/blue or apexi safc. I don't know whats available for such a new car.

Leave it as is, you'd probably be voiding your warranty.
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Old 06-11-2009, 04:31 PM   #11
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I'd have to personally tell you to stay away from piggybacks. I've never been a big fan of them, as all they do is "trick" your ECU into thinking your car is running leaner or richer at various points. An ECU flash or stand alone will provide much more long term stability with proper tuning. Of course, this will completely void your warranty, assuming you're concerned about that.

As well, even though most people doing AFR tuning tend to run FI or ITB setups, the information within those posts and threads are still completely usable for NA engines as well. OEM ECU's from the factory naturally run rich, leaving a fair bit of room for tuning. Depending on the vehicle, you can actually see quite a difference in both fuel economy and power gains by simply tuning your AFR. The other advantage of doing this is that you've already got the means to do quick tunes in case you ever do decide to throw in a bigger cam or some other big "bolt on's."
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