fdracer

is there an inexpensive yet effective fuel only computer out there? who makes one? this is for a street car w/ mild boost, i just wanna be able to tune my 1200cc secondaries.

RETed

Define "cheap"?
Why not use an A'PEXi S-AFC?



-Ted

fdracer

i was thinking about that, but the difference between the stock 850's and my 1200's is too great to tune well. i just wanna lean it out a little in the low and mid-range. w/ the s-afc i'm specifically worried about the transition when the secodaries kick in. first of all they don't kick in based solely on rpm, and the s-afc is only rpm dependent, so i can't lean out the motor right when they kick in. secondly, since the s-afc is only fooling the computer to read a lower map, the secodaries might be delayed in kicking in cause the ecu thinks it's getting less air than it really is. i don't wanna do this and go lean. what i really need is a fuel only ecu which will control injector pulsewidth of my secondaries.

10sec rx7

Get a microtech MT4, will run 4 injectors fine, or you can use it just for your primarys,
i would use it to control all your fuel requirments, you can tell the secondarys when to turn on in both MAP and RPM,
they are handset programmable so no need for a laptop.

Retail for around $700au or $375us and the handset is $150au or $80us

Dale

fdracer

thanks dale, i appreciate it. will the mt4 still allow the stock ecu to function for all the other parameters other than the fuel?

fdracer

oh, where's the cheapest place i can get the mt4 from?

RETed

The S-AFC can adjust down -50%, which means theoretically you could run ~1600's in the secondaries (to replace stock 850's) and still cut the pulsewidths down by 50% to get the original fuel delivery @ 850cc's.

The newest S-AFC does offer "HI" and "LO" settings, which is usually adequate enough for most vehicles.&nbsp The "HI" setting should be WOT runs, which should replicate the fuel injection crossover pretty consistently.

I don't know if you know how involved it is tuning a 3D system.&nbsp The S-AFC is simple to aide in tuning for most people.


-Ted

fdracer

what about the secondaries not kicking in time w/ the s-afc?

RETed

Well, the S-AFC adjustment is dependent on RPM ranges.&nbsp I don't know how the FD3S runs in terms of it's fuel injector crossover, but the FC3S is at 3,800RPM +/- 200RPM, which makes it a pretty narrow band.

The S-AFC might be "good enough" in your case.&nbsp You might to ask other FD3S owners who have direct experience with such an application?&nbsp Might want to drop a note in the 3G section in here...



-Ted

fdracer

cool, thanks reted.

10sec rx7

[QUOTE]Originally posted by fdracer
thanks dale, i appreciate it. will the mt4 still allow the stock ecu to function for all the other parameters other than the fuel? [/QUOTE

Yes the MT4 will allow the standard ECU to run the ignation, the mt4 only requires a tacho pick up to run the computer.
you can control everthing to do with the fuel dilevery

try www.daltonautomotive.com he has good prices.

Dale

TonyTurboII

Haltech F9.

10sec rx7

Will a F9 run 3 sets of injectors staged to come in at 3 different times?? dont think it will, and from the look of the haltech web site the F9 isnt made anymore they are on to the F10

TonyTurboII

Where did he say 3 sets?

10sec rx7

sorry getting confused with another thread!

Rs4Racer

Does microtech have a website? I need a ecm that Will control my fuel and ignition, how does the mtx-8 compare to the haltech e6k(?) ? Im going to be running 4 injectors, dual tb's that has 1 tps and 2 map sensors. I expect about 200rwhp. Will the microtech be better then the haltec for me?

10sec rx7

Microtech website is under construcion at the moment,

the microtech will run the setup you are describing perfectly, you can tune using the TPS until it comes on boost and then it swaps to map, this way is the best way to do a duel throttle body,

im not going to say weather the microtech is better than haltech etc, i have my choice in the microtech, which i think is a eaiser product to use for the home user,

Dale

Rs4Racer

awsome... lol no boost man its gonna be n/a

10sec rx7

Is it highly ported??? if it isnt you will be able to get away using map, but TPS is a better way to do it and works a treat on NA cars, im using a LT8 on my ski boat and using TPS to map it and it is 400x better than the holley carb that we had on there, cruses at any speed perfectly!!

TonyTurboII

N/A? Ditch all that crap and put huge carbs on it! Who needs all that damn wiring.

10sec rx7

And have bad fuel economy and no cruse, poor cold starting,

Stuff that

TonyTurboII

Cruise is for wussys, cold start is hard to tune for, Fuel economy? Come on, look what we're driving.

What ever happened to simplicity...

Evil Aviator

If you are just looking for general information on the Microtech EMS products, this site is pretty good:
http://www.mazkwik.com.au/products/microtech/

10sec rx7

true, some fuel economy is good tho, gets a bit tedious filling up with fuel every few hours tho!

Simplicity is good!

kabooski

Microtech is starting to make big gains here if Florida

Anthony came down and trained a Haltech tuner in Microtech and the Guy loves LTX now

Says it is much easier to tune and has more accurate timming control then the E6k

I got the E6K now but my friend is going to Australia in Jan. He is going to pick me up a LTX-8 and some other little goodies while he is there

Fuel Only options
are the
MT-4 FMS with hand controller $550 give or take shipped
SDS FMS $700 +
F9a FMS $700+
Apexi PFMS
E-Manage PEMS
HKS PEMS