UpRev tuned!
 

Just had it done today and I thought I would share the graphs etc. Took a little under 2 hours. Pulls way harder between 2-3k rpm where those dead spots were.

Mods:
F.I. CBE + HFC
Stillen G3 Intakes

Gains were 22.9hp/18.8tq on this dyno. It's a hydraulic dyno and i'm not too sure how much that changes the numbers compared to a roller dyno.

Red is baseline.

Torque/HP
http://i.imgur.com/WulXB.jpg
AFR
http://i.imgur.com/oOLXk.jpg

Who did your tuning? Great gains, CG's

Very nice gains. Your AFRs were all over the place pre-tune. Good thing you got that straightened out.

got it all nice and smoothed out now.

Forgive my noobyness, but isn't your far supposed to be around 12.5ish average?


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...not bad. Congrats !

I'm just as big a noob as you and i'm wondering the same thing :) Can anyone chime in?

12.5 is a moderate tune for NA. 13+ and youre getting into very lean numbers but more power. He does have more of a chance for detonation but if hes got 93 octane he should be fine. I can't wait to get mine tuned.....Im runnin so pig rich right now its just rediculous!

http://i184.photobucket.com/albums/x...66809327_n.jpg

If my AFRs are a bit above 13 in the lower rpm range would it be a big problem?
Should I check it out with the tuner or just leave it? :ughdance:

Tim, from Xact Dyno!
According to UpRevs website hes the only certified tuner in Arizona.
Which is why I ended up going to him. :tup:

I tuned mine AFR to 11:1,my stock AFR are 10.5:1,tried 12.5:1,engine very noisy...maybe weather too warm in S'pore.

~12.5 on map 1 for me, it feels fantastic.

Mid 13s is a bit too conservative, no?

conservative? What do you consider yours then at 12.5? The higher the number, the leaner it is. the leaner it is, the more agressive it is. I'll probably aim for low 13's for my tune. 14.6 is stoic which is a perfect air:fuel ratio but very dangerous on detonation. low 13's is mildly agressive. I would consider mid 13's fairly agressive.

Well this definitely explains why my car runs so much better with 93 as opposed to 91 with it still being untuned. So 13 is considered okay running 93? I always see people shooting for 12.6-12.8. I'm running 13.5-13.8 untuned right now, and it's running better than I thought, but still not as good as it could be.

I actually didnt get my AFR printout when I got tuned. I wish I knew where I was at, hmmmm.

untuned i am currently running 12 in low rpm and 11.5 in high rpm

wow thats really lean for untuned....not a bad thing necessarily but not common at all! Reldas, you're right where the factory ecu should be. Its set to run richer in the top end to prevent detonation. The reason we run so rich is because they made the car to be able to run without premium.....even though it says it requires it, the tune doesnt. Firehawk MUST run premium or he will get detonation guaranteed.

I'm getting UpRev tuned at RT Tuning on Tuesday. Can't wait!

thing is i have stillen g3's, f.i CBE and stillen HFC's. stock my a/f was 10

Thats where I got my car done. Cool guys over there.

Highly recommend R/T. Vince is an expert tuner and very pleased with the tune he did on my Nismo.

So should I be alright with my AFRs? Or should I be worried?

After a little more reading up, with mid 13s you should be fine as long as you run premium. To be safe you could invest in an afr gauge to monitor it. If you get up to 14 then you should be worried.

Also, one more question... When we run lean like that, does that technically improve gas mileage? I'm just curious, I know with uprev we can get a economy map, but I'm just wondering for information sake if running lean gives any improvement over stock?


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Premium here in AZ is 91. So im hoping that's enough :ugh2:

uprev tuned, he should not have an issue with AFRs at that point. Where they are is where they stay as long as some freak burst of air floods his motor. NA VS FI is much more predictable which is why they run FI around 12:1 AFR's or lower cause there CAN be large variations in air. If 91 octane is what you had in the car when your guy tuned it you should be fine. He SHOUDLVE been able to tell if there was detonation or not when tuning it on the 91. If not, thats scary........

Switching between map 1 and map 2 on my tune switches between AFR targets of mid-12s and high 12s. The leaner the mixture, the slower my car feels. Going to stock map, which leans out to 13s and 14s and the car feels notably worse. All on 93 octane in NYC.

I'm a little confused why you'd call a lean mixture as more aggressive when it feels worse driving.

There has to be some misinformation going on SOMEWHERE because Z's come from the factory at low 12's, high 11's.

The amount of fuel being shot into the pistons remains the same, it's the amount of air being taken in that increases. They higher the AFR, the leaner the fuel amount is, and therefore more aggressive.


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X2..........plus :icon18: at your phone message :roflpuke2:

I was under the impression VQs are better off running ~12.5:1 mixture, as opposed to anything leaner. And that factory is a bit lean with 14s in the low-end and mid to make the car more fuel efficient...but tuning it to a mixture around 12s adds considerably more power down low, thus making the car more aggressive in every day driving. It only hits 11s and 12s under WOT when you're approaching redline. Anything below the 5500RPM mark, and you're around 15s 2-3K RPM, 14s 3-4K RPM, and 13s 4-5K RPM.

If that is not the case, then why does nearly every dyno chart and tuner strive to hit an AFR in the 12s for VQs? I'm not trying to be an ***, btw...I'm legitimately curious.

when you dyno it is under full throttle......when you tune it is under full throttle....Reason being they LEAN it out cause as yous stated yourself, it is rich down in the 11's. They lean it out to create power. MY personal AFR at full throttle am at 11.5 all the way through from 2k all the way up to 7800. I am rich through my entire powerband at full throttle which is what we are talkin about. FULL THROTTLE RUNS! Dunno if his tuner actually messed with normal driving tune. My tuner will be tuning for full throttle and daily driving which is what all tuners should be.

http://i184.photobucket.com/albums/x...809327_n-1.jpg

I think you have the right idea, it's just that your numbers are backwards. The higher the number, the closer you are to detonation. Of course the factory doesn't want that so they are going to set the tune far away from that (11-12.5). The higher the number, the more cold air is being forced into the pistons, allowing for a better ignition, resulting in more power.

The link explains a it of it...

http://www.tricktuners.com/widebands..._explained.htm


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Haha, cool. I think we were on two different pages before. I get what you're saying now.

Just to clarify my statements, if you noticed a few posts up, I was talking about daily driving and lower-end power improvements, granted I did mention dynos and such so I understand the confusion. Though, I was talking about the overly lean tendencies of the mixture from the factory under normal driving conditions, and even WOT in the low-end, which can be seen in your dyno chart as the mixture starts out in the 16s or so (?) and declines. But yeah, now that we're on the same page I understand what you meant.

Nissan's tuned the motor oddly low-end and high-end. Clearly, as your chart shows, the mid-range tends to need the least work with these cars. Ah well.

Any drawbacks to running it closer to high-11s like you are? How does it feel once the oil is up to temp and intake temperatures increase? One thing I've noticed is that these motors don't like their timing messed with, I did some minor tweaking of the timing with UpRev's personal assistance and the motor did not respond well to it at all once the oil temps were 180 (I have an oil cooler). When the car is cool or the weather is cold, it ran fantastic, but other than that...the ECU begins to pull so much timing the car practically felt like it was in limp mode. No throttle, no power, nothing. UpRev discarded that tune and I flashed it to my current ROM with an idle adjustment to 850RPM added.

This is what my tuner just said. Lemme know if it is rubbish haha.

"13 is a very standard AFR for normally aspirated.
I would run an old 2-valve pushrod engine at 12.5 because their combustion chamber design is really poor and detonation can happen fast. but today's 4 valve engines have advanced combustion chambers that are designed to prevent detonation from the start."

@ conor1123: 13 for an NA motor isn't technically "standard" per sey from factory. After a tune for power then yes, it is what a lot of NA cars aim for since it is a good balance of power and detonation resistance. As i stated earlier, it's what i am going for after my tune

@ Arnold K.: The lean factor is what every vehicle is tuned for under basic driving. Better fuel economy is achieved from a leaner mixture and with it tuned for less throttle and under less load, detonation is assumed to never be an issue for factory settings. There are really no repercussions for running as rich as the stock map has it set at other then burning more fuel then technically necessary unless it is ridiculously excessively rich in which it would flood the motor. It does run cooler then a higher AFR for a little bit but it does lack power. Its more of a "safety net" and for your average driver then someone trying to maximize power gains.

Ok one thing to clarify, AF Ratio does not control the "air forced into the piston". That is controlled by the throttle valve. AF Ratio injects fuel based on the amount of air measured flowing in.

As for maximum power, it's a combination of AF ratio and iginition timing. The key is to avoid detonation and leave a certain safety margin.

That's pretty much what I meant, I just said it retarded :)


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