Thats basicly it. would it gain me anything with only an intake and soon to come y-pipe? i plan on going with NX wet setup later but for now would it gain anything on my current setup or would it be a waste of money? and could someone explaine exactly what it is and does i have a pretty good idea i just want to make sure im on the right track with my thoughts

 

An air flow converter intercepts the voltage signal coming from the mass air flow sensor and adds to or subtracts volts from the signal before it reaches the ecu. It fools the ecu into thinking there is more (or less) air going into the engine (depending on how much correction you input), so the ecu adjusts fuel injector duty cycle based on the converted signal.

It may give you some gains if you use it to richen your afr, but probably not more than a couple of hp. It terms of hp/$ it is not worth it, but it has some other useful features too if you start getting into serious modding. For instance, it tells you what the max airflow signal was during a WOT run, which you can compare with previous runs to determine if a particular mod has improved the volumetric efficiency of your engine. You can also use it to check throttle position sensor, O2 sensor and of course maf volts.

 

there have been instances where header equipped 3.5s picked up 8-10whp and around the same torque tuning with a safc. it seems to be the consensus is that headers tend to throw it off more than any other bolt on so picking up a safc is a good idea. i would recommend getting a few dyno runs and checking the a/f ratio to see if it is justified. i have been in the process of picking up a used vafc2 to tune with after my headers and adjust my vi crossover.

 

Yeah the SAFC would be good if you had a set of headers on a N/A car, but it wouldn't be necessery if you don't have nothing else on your car. But when it comes to turbo's and supercharger's, the afc becomes essential for tuning.

BTW Sloppymax, I also have headers now!!! (I just thought you would wanna know because I remember talking to you about the Hotshot ones you have).

 

i am sure you will enjoy them. i am hopeful i can pull some power with the vafc like the few 3.5 n/a guys have with their safcs.

 

ok thanks guy yea i went to the track last night and pulled a 15.6 at 87.04 mph so im going to drop some $$$ on a y pipe then b-pipe and then ill see where i stand

 

Definitely can help and is a good investment.. works on nearly every car setup so you can always get rid of it easy if you need cash later or find that it doesn't help you much.

 

very true good point i might invest in one after the y/b

 

<-------14whp/8wtq...My max is NA with headers.

 

that is what i got w/ the S-AFCII

 

Good to hear that things are coming along nicely, J. I wish I had headers... I did pick up some Illuminas recently though, your HPs did their job, but it was time to move on...

 

Let me know how that vafc workout but in the mean time I will look for safc. The headers are not on yet, but I my try hardest to make a video clips and post it online for the world to see. And wait, dyno too!!!!! I'am also getting the install for only $175...

 

Hey I was going to pm you saying that I have gotten the C. headers too. Oh well I guess you heard it here, look at for the video clips real soon.

BTW and it good to see you finally got the Illuminas, there alot better than the ol blue's. What's the setting your riding on???

 

Folks, this ^ is the correct answer to the question. Many NA cars actually NEED to be tuned, even 100% bone stock ones. The best thing to do is to dyno the car first with the use of the wideband 02. If the A/F graph is within 13.0-14.0 at WOT then you probably do not need a piggyback fuel computer. There won't be enough gains to justify the cost. But a graph outside those parameters would probably justify it.

Most 2k2-2k3 Maximas NEED to be tuned reguardless of modification or lack therof.

 

are the advantages of headers on a VQ30 worth the work? I mean, ive got the y & b already, and it seems to flow great.....but would headers be worth the cash?

 

Depends on what you deem "worth it" But typically, headers wont do much for the 3.0 compared to what they add to a 3.5L.

 

would i be better suited with getting Cattman Headers+Y-pipe+b-pipe and SAFC2

 

Cattman headers on a 3.0 - typically 5-8 hp/tq over a y-pipe. With everything else opened up (VI, CAI, full exhaust) and a good tune/ECU it may contribute to the cumulative effect also. Hard to say.

If you're staying N/A as a 3.0, probably not worth the extra few hundred. But everyone's definition of "worth it" is different.

 

well i do eventually want to go With an NX wet kit but other than that maybe 3.3 stroker or 3.5 swap im not really sure im still pulling my thought together on all of the diff. setups i want to see dynos and 1/4 times before i make a desision on that but i will in the end befor i put this car in storage it will be turbo'd but thats not for some years

 

Sure .

 

So how would I read the A/F ratio on my dyno? Is it the lower the number, the more lean I'm running? It looks like I dip below 12 at WOT...
http://www.angelfire.com/jazz/loosli...a/dyno1ATP.pdf <- Old dyno, BTW

 

Other way around. Decreasing afr indicates increasing richness.