Intake, Header, HFC, CBE = Too Lean?

semtex · 03-25-2010, 04:50 PM

Quote:

Originally Posted by Zsteve

True and the canned map that you get without having to send your info back and forth will take care of that too. I get my Cobb today and I will see if I can get some AF reading before and after to see how they changed the AF with just a canned tune.

Hmm...I'm not so sure it would though. Well, let me phrase that a little differently. It depends on whether or not the canned map properly takes into account all these mods that causing people's cars to run lean. I'll be very interested to see your results. It should settle this particular question once and for all. I certainly hope it takes care of the AFR. Less hassle/effort/expense for those who are just looking to correct their AFR!

theDreamer · 03-25-2010, 04:51 PM

Semtex is right, they have to do two (or more usually) runs.
The first run will be getting my current baseline numbers, AF ratio, etc. Then they will start to do more runs smoothing everything out and making adjustments as needed.

theDreamer · 03-25-2010, 04:52 PM

Quote:

Originally Posted by semtex

Hmm...I'm not so sure it would though. Well, let me phrase that a little differently. It depends on whether or not the canned map properly takes into account all these mods that causing people's cars to run lean. I'll be very interested to see your results. It should settle this particular question once and for all. I certainly hope it takes care of the AFR. Less hassle/effort/expense for those who are just looking to correct their AFR!

Very true, if a canned tune can bring the AFR back into the proper range without a dyno tune that will be great for people just wanting that.

semtex · 03-25-2010, 04:55 PM

Quote:

Originally Posted by Zsteve

Yea a dyno after they load the new map and then one after they tweak it on the dyno. To get an idea how much the dyno tune will get you over a canned map.

I can't speak for Cobb, but I can tell you that when you reflash the new ROM into your ECU with UpRev, that base map is exactly that. It's a base map that has all of the factory parameters, and assumes no mods. By itself, it is not intended to yield any gains. Its sole purpose is to provide the tuner with a platform on which he can load maps that he builds via the process of running your car on the dyno. You see, the factory ROM that comes from Nissan allows no such thing. There are no 'slots' to drop the maps you build into, so to speak. So you replace the factory ROM with UpRev's ROM, and their ROM has these 'slots' for you to plug your performance map(s) into (as well as your valet and anti-theft maps).

Zsteve · 03-25-2010, 04:55 PM

Quote:

Originally Posted by theDreamer

Semtex is right, they have to do two (or more usually) runs.
The first run will be getting my current baseline numbers, AF ratio, etc. Then they will start to do more runs smoothing everything out and making adjustments as needed.

Oh OK I guess I was under the impression they would load a canned map first then do the dyno tune.

Zsteve · 03-25-2010, 04:56 PM

Quote:

Originally Posted by semtex

I can't speak for Cobb, but I can tell you that when you reflash the new ROM into your ECU with UpRev, that base map is exactly that. It's a base map that has all of the factory parameters, and assumes no mods. By itself, it is not intended to yield any gains. Its sole purpose is to provide the tuner with a platform on which he can load maps that he builds via the process of running your car on the dyno. You see, the factory ROM that comes from Nissan allows no such thing. There are no 'slots' to drop the maps you build into, so to speak. So you replace the factory ROM with UpRev's ROM, and their ROM has these 'slots' for you to plug your performance map(s) into (as well as your valet and anti-theft maps).

AA has you tell them what mods you have and they adjust the tune acording to the mods and I think the AFR is one of the changes and probably timing, then they put it on the accessport for you to load.

semtex · 03-25-2010, 05:01 PM

Quote:

Originally Posted by Zsteve

AA has you tell them what mods you have and they adjust the tune acording to the mods and I think the AFR is one of the changes and probably timing, then they put it on the accessport for you to load.

Right, and that would be equivalent to Uprev's e-tune service. But I don't know of anyone on this forum who has tried Uprev's e-tune yet. That's why I was asking Dreamer if he was getting a dyno tune, because for a moment I thought maybe he was going to try the e-tune. See it's one or the other, you don't do both. Now, a e-tune is a viable alternative if you don't want to (or just can't) do a full dyno-tune.

But you can also use Cobb to do a full dyno tune. And if you were to do that, I suspect it'd work in much the same way as Uprev. i.e., the initial load would be a 'blank' map that has all the same parameters as a stock car. It'd be kinda like a blank canvas onto which your dyno tuner could lay down his masterpiece.

Zsteve · 03-25-2010, 05:02 PM

so to find if Im running lean right now, what gear and rpm range should I do a AFR check in? I have the 7AT.

semtex · 03-25-2010, 05:03 PM

Doesn't Cobb log the data as you run through all the gears? Like it doesn't require you to stay in just one gear while you log, does it?

Red370 · 03-25-2010, 05:04 PM

quick question since we're on the subject, the software that came with my AP doesnt allow me to view my maps or alter them, its some kind of crazy format, any ideas on what software I should download to view them?

Zsteve · 03-25-2010, 05:06 PM

Quote:

Originally Posted by semtex

Doesn't Cobb log the data as you run through all the gears? Like it doesn't require you to stay in just one gear while you log, does it?

Im not sure I will see when I get it, I know it logs just dont know if its an all time thing or not.

Quote:

Originally Posted by Red370

quick question since we're on the subject, the software that came with my AP doesnt allow me to view my maps or alter them, its some kind of crazy format, any ideas on what software I should download to view them?

I think Cobb has a tuners software program you can buy to do that.

semtex · 03-25-2010, 05:08 PM

Quote:

Originally Posted by Zsteve

Im not sure I will see when I get it, I know it logs just dont know if its an all time thing or not.

I think Cobb has a tuners software program you can buy to do that.

Hmm...Well, if you think of a dyno graph, AFR is measured throughout the entire RPM range. So I would expect Cobb to do the same thing. But you might have to stay in a particular gear, just like you dyno in a particular gear. On the 7AT, I think you're supposed to dyno in 6th.

Red370 · 03-25-2010, 05:09 PM

Quote:

Originally Posted by Zsteve

Im not sure I will see when I get it, I know it logs just dont know if its an all time thing or not.

I think Cobb has a tuners software program you can buy to do that.

You would think that it would come with the hardware...

theDreamer · 03-25-2010, 05:09 PM

CobbTuning.com - AccessPORT > Tune > Self-Tuning - Cobb PC software.

Zsteve · 03-25-2010, 05:10 PM

Alex when you did your AFR scans how were they done?

03-25-2010, 04:51 PM	#92 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4210	Semtex is right, they have to do two (or more usually) runs. The first run will be getting my current baseline numbers, AF ratio, etc. Then they will start to do more runs smoothing everything out and making adjustments as needed. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

03-25-2010, 05:02 PM	#98 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	so to find if Im running lean right now, what gear and rpm range should I do a AFR check in? I have the 7AT. __________________ 2010 LS3 C6 Silver coupe corvette

03-25-2010, 05:03 PM	#99 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	Doesn't Cobb log the data as you run through all the gears? Like it doesn't require you to stay in just one gear while you log, does it? __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

03-25-2010, 05:04 PM	#100 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 296	quick question since we're on the subject, the software that came with my AP doesnt allow me to view my maps or alter them, its some kind of crazy format, any ideas on what software I should download to view them? __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs

03-25-2010, 05:09 PM	#104 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4210	CobbTuning.com - AccessPORT > Tune > Self-Tuning - Cobb PC software. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

03-25-2010, 05:10 PM	#105 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	Alex when you did your AFR scans how were they done? __________________ 2010 LS3 C6 Silver coupe corvette

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DIY: Stillen header installation	semtex	DIY Section (Do-It-Yourself)	39	01-10-2017 05:29 PM
Running too lean?	G37Sam	Tuning	21	06-01-2010 11:25 AM
Stillen header issue finally fixed	1uk32	Intake/Exhaust	14	10-04-2009 07:37 PM
question about stillen header	chirojin	Nissan 370Z General Discussions	0	07-12-2009 03:38 PM
Muffler shop ? and header questions..	AceSpade77	Intake/Exhaust	3	05-06-2009 12:35 PM