Boost/fuel controller.

[9Hooker]

Greetings.

Own a CX-7 and noticed the similarities in the motors. I would like a little more control of fuel delivery/maybe eek out a # or two out of the stock turbo.

I come from Honda land where we routinely use things like the Apex'i VAFC/SAFC. This is my first entry into FI. What are people using to control fuel/boost in the DISI motors?

I was looking into the Apex'i AVCR. Does anyone have this, and could anyone recommend me anything else?

BTW my first upgrade will probably be that fatty TMIC upgrade I've seen hanging around here on this forum....

 

[jcgemt2003]

Greetings.

Own a CX-7 and noticed the similarities in the motors. I would like a little more control of fuel delivery/maybe eek out a # or two out of the stock turbo.

I come from Honda land where we routinely use things like the Apex'i VAFC/SAFC. This is my first entry into FI. What are people using to control fuel/boost in the DISI motors?

I was looking into the Apex'i AVCR. Does anyone have this, and could anyone recommend me anything else?

BTW my first upgrade will probably be that fatty TMIC upgrade I've seen hanging around here on this forum....

Your gonna be waiting for awhile because there is nothing out yet. A manual boost controller or EBC will not increase your horsepower the least bit. The fuel cuttoff is 18psi and the turbo is pretty much maxed out at 15.5psi. The motors are exactly the same. The cx-7 is just tuned down a little and they havent released a piggyback system for tuning just yet.....maybe the spring of 2007.

 

[jcgemt2003]

Your gonna be waiting for awhile because there is nothing out yet. A manual boost controller or EBC will not increase your horsepower the least bit. The fuel cuttoff is 18psi and the turbo is pretty much maxed out at 15.5psi. The motors are exactly the same. The cx-7 is just tuned down a little and they havent released a piggyback system for tuning just yet.....maybe the spring of 2007.

Your first upgrade should be a cold air intake. Then a downpipe and exhaust....this turbo is very restricted by both stock items.

 

[jdub260]

FYI

Cobb Tuner Comming Soon

 

[9Hooker]

Your first upgrade should be a cold air intake. Then a downpipe and exhaust....this turbo is very restricted by both stock items.

I understand that although the turbo is lacking, helping unkink some bottlenecks should be a priority.

I CAI would be pretty low on my list of upgrade items. First I will be looking at the TMIC upgrade. It looks like there is less pressure drop and better cooling compared to the stock setup. That opens a huge bottleneck right there.

I noticed in that dyno graph the increased a/f ratio due to better efficiency of the intercooler. This is why I wanted to tweak the fuel to be a little more lean (not near the 10:1 of the stock setup the dyno showed), and the boost controller would just be an added benefit.

Then would be a decent turbo-back exhaust. That's also pretty low on the list. I like driving around not hearing the obnoxious sound the can is making in the back of the vehicle.

Again, my background was building fast Honda's. I owned a 12 second all motor daily driver. I HATED hearing that tailpipe day in and day out. I'm done with that fad. I like quick and quiet. I also don't want to spend a fortune. I've already done that and have the time slips to prove it.

So my mods will probably go something like this:
TMIC
Electronic fuel/boost controller
Ported/deburred exhaust manifold
Efficient downpipe to high flow cat (CX-7 anyone, Bueller, Bueller?)
Efficient BOV (+ Damn MAF systems, grumble grumble grumble)
More efficient intake with short piping
Booking some AWD dyno time.
Done.

It is an SUV, and for chrissake it's an automatic! I'm not hoping for the moon.

 

[DSMConvert]

hmm didn't know the cx-7 was goign to need fuel control...I could potentially have one tested and on the market by February...maybe sooner if the demand is there...

 

[9Hooker]

I'm probably gonna go with the tried and true Apex SAFC2. I tuned 20+ hp out of a Toyota Celica (this was in 2001) with an otherwise stock car. Have I mentioned I hate MAF systems?

All I need now is a place to buy one (hint hint DSMConvert) and maybe a pre-spliced wiring harness like this one... but for the 7. Probably just need a nice wiring diagram...

 

[DSMConvert]

9hooker the apexi will not work...hehe ours is not an apexi afc..its a completely different piggy back all together....it just happens to also be called an AFC...do a search in the msp forums or visit our website and that should explain what I mean and why the apexi does not work on mazda ecus...hehe the whole reason we got into AFCs with split second was b/c the apexi was imcompatable...

-John

www.airflowlogistics.com

 

[9Hooker]

Do explain how it's not gonna work.

You need throttle, maf in, maf out, rpm, power and ground, right? It's been a couple of years since I've installed one.

I guess I may have to jump on your bandwagon when you come up with a 7 one.

 

[DSMConvert]

well the maf signal is the issue...the apexi unit uses the most common maf voltage of 5-12v(which pretty much every car known to man uses)....mazda, on the other hand, decided to be difficult and uses a combination of an odd voltage(0-4) and a freq fluctuation to determine maf values...

 

[9Hooker]

ARGH. Ok, if it's a no go, hook me up with one of yours.