Which Computer should I buy ? Apexi PFC Or Microtech LT12 or SAFC2 ?

[Guilt-Toy]

Hey Guys

Im sure this may have been asked before.. but here goes...

I am sick and tired of my standard computer. The biggest let down of my R33 skyline has been the standard computer and the fuel cut problem. Air flow meters drive me crazy and I want to get rid of it once and for all. Fuel cut defenders drive me crazy.. Sick of getting dyno read outs at 95ks an hour because it hits fuel cut rah hah rah

I can get a Microtech LT12 for my R33 for $1550.00 (No hand controller)

OR

I can get a APEXi D Jetro PFC for $1,103.00 and $1,462.00 with HC (this version gets rid of the air flow meter so I wont have to worry about that)

OR

APEXi SAFC2 or similar.

My mods are

T3/T4 hybrid turbo (no ceramic rear wheel)

Supra Front mount

cold air injduction & K&N

3" HKS exaust

Would a SAFC2 do the job? or should i get a APEXi D Jetro PFC and just be done with it ?

I am after 225rwkw and plan on doing the RB30 upgrade within the next three months too.

[predator]

I think the S-AFC will give you problems with the bigger turbo as its only controlling fuel and the ECU will need more than just fuel map adjustments to suit the larger turbo properly.. but it will fix the fuel cut problem.

I think you're best with the PFC unless you are going to have troubles finding somebody who can tune it properly. Otherwise the microtech in capable hands should do a similar job. Either will probably be a better choice than the S-AFC

[Parag0n]

Rb30 Upgrade, how much performance would you get out of that ?

Thats the Commodore VL Engine right ?

[51jay]

I'd go the Power FC if you have someone to tune it up properly....I wouldn;t be in too much of a hurry to get rid of the AFM either.

I currently have the EMS Dual Sport and will probably change to a PFC when I can afford it

[Guilt-Toy]

If you say that i should keep the Air flow meter.. but doesnt the air flow meter have a limit to how much power it can make? Wouldnt I have to upgrade to a Z32 AFM ?

If so.. whats the point? stuff the AFM off and go map sensor I say..

So why keep the AFM?

[aybee]

the afm is supposed to be more accurate than a map sensor. so if your going for the extra tunability of the power fc then youd be better off with more accurate readings.

i read somewhere on here that the rb25 afm is good up to 250 rwkw, but dont quote me.

[strutto]

Engines with an AFM will usually be more driveable and have better fuel economy.

Depends how far you want to go... If your not going to change the turbo and what to keep it fairly driveable, go the PowerFC.

The older Microtechs give poor fuel economy but make good power. I don't know if the newer models are any better.

[JimX]

Here's the same advice I give anyone. If you have the bucks, get the PowerFC. If you don't, rather than waiting and saving up until you can afford one, get a S-AFC (or S-AFC2) new or second hand (preferably second hand). Then tune that and start saving for your PowerFC. When you have almost enough, sell the S-AFC and use the cash to partially the PowerFC.

With this approach you will probably find you can live longer without an ECU replacement. And you will get most of your money back on the S-AFC so you haven't really lost much money, but gained a pretty good state of tune while you wait for the PowerFC to become affordable.

[Muz]

I think that I have read just about all the threads on this forum about replacement ecu's and as yet can not form an honest opinion on which is better. The PFC certainly has a good reputation but is a little on the dollar rich side whilst the Microtech range appear to offer a good product at the less expensive price range. One thread started to talk about fuel consumption but nothing really substantial was forthcoming. Can anyone who has the PFC and anyone who is using the latest Microtech (LTX-12) please post some honest consumption figures. I think we all agree that both ecu's have the capacity to enable the engine to produce good hp results (when combined with various other mods) so let's see the consumption figures please.

Cheers

[Guilt-Toy]

how is the microtech less for an R33 ??

You can get a PFC from nungen or greenline for about $1500 with hand controller.

Its the same price for a microtech for me but i get a good price. they are $1800 otherwise with no h/c

[Muz]

Oh!

Sounds like a PFC is the way to go if there is someone around your neck of the woods to tune it. All the info on these threads seem to point towards the PFC as the ecu of choice. Post your consumption figures when you get it in and running. I'm not too interested in what power/torque it will make for you but the fuel consumption side is more of an interest for me. If they are as economical as these threads would have us believe, then I will have an LTX-12 for sale pretty soon.

Cheers

[Mr Rb20]

So what's the story on the Z32 AFM upgrade with the Power FC ??

Why would anyone do that ?? What is the benfit ??

How good is the standard RB25 AFM ?? Up to what power can it go ??

What about the injectors and the turbo ??

I'm looking for 230-240kws at the rears.

Would the standard turbo, injectors and AFM handle this if i put a APEXi Power FC ??

[RbHed]

z32 afm are bigger than the rb25... handle more power

[meggala]

also one thing to consider if you get a full epa inspection the microtech is much ahrder to pull out where aswith the power fc you just unplug it and plug inthe stock ecu

meggala

[Muz]

Doesn't the latest Microtech do that as well? All the info that I have manged to find on the LTX-12 indicates a simple "plug and play"

[Mr Rb20]

Does the twin turbo 300zx have one or two Z32 AFM on it seeing it is a twin turbo ??

At what stage (power outoput) would you change the AFM to a Z32 and change the injectors and turbo ??

[51jay]

I'm pretty sure the Z32 AFM is the same size or slightly smaller then the RB25......the difference lies in how the signal is read

[Mr Rb20]

If that is the case, what is the advantage ??

How does the Z32 read it and what does that do for the RB25 ??

[4 Doorz]

Yeah, what's the diff? I was told there wasn't that much different and if you wanted to bother, just go the VH41 90mm AFM

[David Alchin]

Just done an engine conversion, put in a Rb25det into a vl and have replaced standard comp with Microtech. Best and cheapest alternative for all occasions. But I got next model up with hand and external coil driver for a lot less 12 or 13 hundred I think.