how would I have not know dawgin autos is what he does best. Will he ever leave

 

He needs SERIOUS help.

 

seriously

 

 

 

What do ya say there Icy-Hot??

 

someone post this link as a picture.

http://www.altimas.net/registry/vehi...?vehicleid=225

 

 

 

pretty strong numbers no real bad spikes except for that 369 tq lol

 

Did you get the A/F graph also?

 

 

here is the air/fuel graph. vertical line is the beginning of third gear.

someone please post this here

 

Any luck?

 

ACK!! That A/F graph looks like ****. I now wonder if the O2 relocation has had an adverse effect.

Do you have any recorded data before you installed the headers?

 

Can you get the A/F vs. RPM instead of time?

 

No because it is an auto, it will look goofy if viewed over RPM's.

 

This is kinda confusing, why would he be running lean becasue of the headers? I know SR20DEN with the dry shot wasnt getting the best A/F ratio but was making some serious whp and wtq. Since a dry shot works with the injectors wouldnt he be running exteremly lean with a dry shot that large? I know hes got another fuel pump and alot of plumming work under the hood to shoot the fuel pressure through the roof. Then whats the case with the Alti? wouldnt a higher volume pump solve this problem for the time being? Its been a long day, I cant think........

 

SR20DEN was bumping up the fuel pressure on the juice, and that makes the injectors pump more fuel. There is no way to make the Alti pump out more fuel, so until he can get an SAFC hooked up, it will not run to it's full potential.

 

Yeah I know, hes got the fuel pump under the hood. Its just that if the alti runs lean then obviously were goin to have the same problem. Looks like in order to get the 100% potential out of these headers then is to get em with the SAFC so in other words around $1K approx. Oh well u gotta pay to play I guess but if the gains are worth it (30+whp w/SAFC ) Then I guess im in as soon as I get the damn car, im gettin impatient here....btw did he order the SAFC or its gonna be a while til u get his ride dyno'd with it.

 

As far as I know he did not order one, I ust suggested it to him.

 

http://forums.maxima.org/showthread.php?threadid=187029

http://glue.umd.edu/~nauman/images/afr.jpg

http://forums.maxima.org/showthread.php?threadid=179887

http://boostedmaximas.com/jane97se/i...ynos/dyno5.jpg

Joaquin and I are going to be visting you VERY soon.

 

what happened with jane97se's A/F graph. is normal 13.6?

 

I know what you're saying, but with an auto, I veiw them under time, not RPM, cause by RPM, you only get to veiw 1 gear.

 

Why does what gear you're in matter for A/F?

It's all RPM relevant, ie if you have an A/F of 12.5@6400 rpm in 3rd, you'll be at 12.5@6400rpm in 4th.

If you're tuning with a FMU or AFC, you look at RPM, right?

 

Ok, I'll go deeper for you, the Altima has a 130mph speed limiter, yes you all heard right A 130MPH SPEED LIMITER ON AN AUTO!!! So we got good data in 2nd gear, and we got less data in 3rd gear because the speed limiter kicked in before redline. Sooo you veiw the run over time and you can see the whole thing over 2 gears. And some auto's have loose tq convertors, and everytime they slip or lock, the dyno interprets that as a gear change. So you could make a 3rd gear pull, but the dyno may see 2 or 3 gears because of the convertor, then your graph would only be from say 4-6k because the convertor slipped when you stepped on it at 3k. Come down to the shop sometime, and I'll edumacate you

 

weird the top of my 3rd is only 120mph

 

hmm.. thats weird mine tops out at 110 mph according to my speedometer.

 

what size tires..if your on stock 225-50-17 your gears should be 40/80/120

 

hmm.. mines stock. but my tranny is slipping a lot. i only reach 110 on third. or maybe my speedometer is off cuz i got new gauges.

 

Hey Dave would he not benafit from a higher volume fuel pump such as the 255lpn whalbo FP? (if thats how its spelled)

 

You can have all the fuel pump in the world, but if the ECU doesn't know what to do with it, then you're back where you started.

 

Ahhhh stupid computer controlled cars. Was the OEM FP atleast providing enough fuel, or was it only the injectors that maxed out. Looks like we are all gonna have this issue sooner or later, the SFAC could only do so much though with the OEM injectors. I dont want to say lets modify the injectors to flow more fuel or anything, Ive never seen that as a good idea. Would ne need to upgrade the pump in order to make 100% use of a SFAC or thats not needed as of yet.

 

I'm sure the fuel pump is adequate. We are using stock fuel pumps in the turbo Contour's we build, and we are doubling the hp.

 

240 out of an auto with a minimal amount of mods - that is crazzy!

 

The reason I was questioning the fuel pump was because the 3.0's usually require and upgraded pump to run the SC if im not mistaken but im sure its required to run the 100 dry shot most use. I didnt know how diff the pump on the 3.5's are compared to the 3.0

 

thanks for the input so far y'all. i am right now saving like a ****, have to dump a lot more money into the vq.

i think a standalone would work, but then you aren't getting "port" FI which i kinda like to have.

 

untrue, higher fuel pressure = more fuel, period.

as I was recently educated today, ECU regulates injector pulse not fuel pressure.

 

^