Power FC guys, question for you.

[IowaRB240SX]

I am about to fire my RB. I am running the Power FC myself. I do have the boost contro unit for it too. Since that uses a map sensor to "talk" to the FC, do I still need to run my MAF with it? Or can I eliminate the MAF? Also, I never fired the car with the stock ECU, but I had McKinney do the wiring so I assume it is all correct, but will my motor run on the Power FC fine or do I need to go straight to the dyno to tune it.

[Carl H]

boost kit is only to provide info to the power fc about boost pressure, its not a maf eliminator.power fc was designed to drop in to the car and start with no issues, basic bolt ons have been tuned into the ecu as is.

[Sil240]

I am about to fire my RB. I am running the Power FC myself. I do have the boost contro unit for it too. Since that uses a map sensor to "talk" to the FC, do I still need to run my MAF with it? Or can I eliminate the MAF? Also, I never fired the car with the stock ECU, but I had McKinney do the wiring so I assume it is all correct, but will my motor run on the Power FC fine or do I need to go straight to the dyno to tune it.

Do you have the D-jetro version or the Regular L-jetro??If you are just talking about the Boost Control kit with the regular L-jetro, you will need to keep your MAF.

[IowaRB240SX]

Yeah, i am pretty sure it is l-jetro. but how can I tell for sure. it is still in the box. does it say on there.

[zdrifter]

Not tryin to steal this thread, but Im about to get a power fc and I want to run a MAP instead of MAF. Which version should I get? Djetro? Future mods will consist of gt35r, greddy intake, injectors, all that good stuff. Looking for around 400-450rwhp pump gas.

[IowaRB240SX]

OK, assuming I have the l-jetro and need a MAF. I am planning on running as much hp as possible. I have a t-70 turbo, 3" exhaust without a cat, 256/8.8 cams, Greddy intake mani, 90 MM tb, 850 cc injectors and 800 gpm fuel pump. Planning on running 20 psi. What's my best MAF option? I have a 90mm Q45 one but will it handle the power. Plus, I am missing the pigtail for it, so I will probably have to buy either the pigtail or a new setup. Or is the Z32 a better way to go? Anyone know the wiring changes for the splice right off hand? I searched and came up with the pins for the 6 wire z32 MAF but that was it.

[zdrifter]

Where did you get your Power FC if you dont mind me askin....

[IowaRB240SX]

Ebay. From a seller called JPSpecialties. I have bought alot of my Skyline stuff from him. Like my Greddy mani, Tomei cams, HKS BOV and cam gears, rear differential, valve springs, and probably more. He is usually pretty good at getting me my stuff within about a week form Japan. faster than most stateside sellers.

[zdrifter]

hmmm Yea I have been searching on Ebay but havent seen any. Cheapest I have found is $980 with commander.

[IowaRB240SX]

I didn't pay that much. I have him on my favorite sellers list at home. I will email him and see what he has and forward it to you.

[zdrifter]

That would be great, Thanks. Now back to your question anyone got answers???

[Carl H]

there is no d-jetro pfc for the rb25 only the 26 and sr.go with the maf closest to your max power, z32 can read 500hp worth of air, the q45 700hp.the larger the maf the less resolution you get so unless you plan to use the full range of that maf dont upgrade to 'too large'.

[IowaRB240SX]

Is that crank or wheel hp? I have been chatting with an aussie and have an identical setup as his RB25 and he is pushing 607 whp. On stock lower end.

[Sil240]

I would assum Crank.The MAF has no idea that there is a transmission, dshaft or wheels.

It measures airflow thats it.

But then again he could of got this info from someone who was running 700WHP and it crapped out on him.

haha I'm no help at all. lol

[pirate87]

for the ease of setting it up with the power FC go with Z32 maf, there is no setting for the Q45 maf.

[240z4u]

I am almost positive there is a setting for a Q maf. At least I have one.

Evan

[IowaRB240SX]

Do you have the wiring diagram to get the Q45 one to work?

[cdorhout]

There is most definately a Q45 option in the PowerFC because I run a Q45 MAF on mine.

I don't have the wiring diagram anymore, but I'm pretty sure I got it on Racebread.

You might as well go big right away, no need to push the limits of a Z32 right off the bat.

[Carl H]

a larger maf is not ideal if you arnt gonna use its full resolution, its almost as bad as maxing out a maf.you loose load points when the resolution is too great for its purpose...

[eh?]

PFC setting for Q45 maf is VH41. I had the Q45 maf on the PFC, it costs less than the Z32 but reads LESS. I know the Aussie forums say the opposite but the they've been so wrong about so many things I don't even bother to browse there any more.

Here is a graphed resolution of the PFC supported maf's.

[Carl H]

interesting...but also keep in mind that the q45 has a substantialy larger inner diamater, while values may seem smaller the larger diamater will offset that.

[eh?]

Probable but The highest I've read from a Z32 was something like 589whp. I don't think I've seen more than 450whp out of the Q45.

[Carl H]

its really hard to say when a maf will max, it is ofcourse airflow dependent.also you can tweak the maf vq map to get a little more resolution out of any maf.

[Darius]

... I have a t-70 turbo, 3" exhaust without a cat, 256/8.8 cams, Greddy intake mani, 90 MM tb, 850 cc injectors and 800 gpm fuel pump.

heh I think your units for the fuel pump are a little off. Do you mean gph? If so, then that's only about 200 lph, which is less than a standard Walbro 255 lph. (voltage dependent, of course).

Another question, why are you running a T-70? Isn't that a non-ball bearing turbo?