Does this increase HP and TQ....if so what kind of gains am I expecting.

http://cgi.ebay.com/ebaymotors/ws/eB...category=33597

 

In closed-loop, ie non-WOT, no. In open-loop, ie WOT, yes.

When you are in closed-loop the 02-sensor feedback to the ECU will compensate/override for any changes the AFC makes. When you are in open-loop you can lean out the over rich A/F ratio using the AFC and a wideband 02 on dyno. However, Maximas(probably all cars) tend to loose torque, but gain horsepower when you slightly lean the A/F to a point, say from 12:1 to 12.5:1, so to your question "Does this increase HP and TQ", I'd say no.

How much gain you can squeeze out is debateable, since no dynos have been done with just an AFC. I'd GUESStimate 5-10hp max. If you don't have all the other bolt-ons, you'd be better off buying something that increases airflow such as an intake/Y-pipe/exhaust, which leans the mixture at WOT anyways.

 

I have a 2k2 speed with intake and pulley....so far those are the only bolt ons...I'm waiting for headers to come out and I plan on changing the piping all the way back but keeping the stock muffler. Any other electronics u might suggest i can use??

 

Not for performance...unless you get N20.

Shiftlight? Stereo? Radar detector(V1 of course!)? Delphi XM radio? Plenty of goodies to spend your loot on. Just not too many for the VQ35 unless you get creative.

 

Once you install a full exhaust (Y, B, Cat, Muffler), you'll need the S-AFC II or the Greddy E-Manage in order to get better gas milage. Either unit will work, but like it was said earlier, you won't really gain HP in the lower end. You'll gain about 5 HP total in the top end.

As for the exhaust, note that you will probably lose a few HP and some torque because the system loses backpressure.

So the gains will basically offset each other. I dyno'd at 213 HP with a WAI and muffler only. Once I got the Y, B, Cat, Exhaust, and E-Manage, I dyno'd at 215 HP. I lost almost 15-20 ft/lbs of torque over the entire curve too. But it's basically because of the loss of backpressure.

FYI.

 

Any details on your E-manage? How was the install? How many points can you adjust?

Details please.

 

What I would of spent on this unit, i took the money and bought a digital camera. Thanks for the help!!!

 

your not gonna see squat. You need boost to get anything out of it

 

The E-Manage unit was $350.00. The software (not required) was an additional $139.00.

The unit itself has 5 adjustment points that are preset. You can adjust each point +/- 20%. The preset points are 2000, 3000, 4000, 5000, and 6000 RPMs.

The unit installs quickly. You cut the MAF sensor wire coming from the MAF (going to the ECU) and connect it to the input of the unit. You connect the output of the unit to the MAF sensor wire going to the ECU. You tap the tach signal and connect it to the unit. You provide constant power, constant ground, and switched power to the unit. The connections are finished.

You'll need to tune it on a dyno unless you are able to read your air/fuel mixtures in a logging software. The tuning takes about 1 hour of time.

If you opt for the software, then you increase your adjustment points to a total of 16. The adjustment points are also variable inside the software. You can have 2 points as close as 100 RPMs apart from each other.

The unit will do alot more than just air/fuel. It can control ignition timing, extra cylinders' ignition, VTEC management (for Hondas and Acuras). It does even more, but I can't remember all of them.

The software also has real-time communication with the unit, as well as real-time monitoring and logging. You can save the log for later review.

As far as I've been told, the ignition portion of the system hasn't been fully tested on the VQ35 motor, and has been said to cause problems. I don't personally use that portion of the unit.

The unit is small and compact. It does not include a display. It is designed as a hideaway module, not a display module like the S-AFC I/II.

I hope this helps.