derk_dkb

hi
i recently bought a power fc and have been reading about how to tune online
ive tried looking for tips here but cant really find anything
i am wanting to know if it is possible to tune with no previous experience as long as you follow the right start up procedure

current mods
car is a 95 FD 13b twin turbo
fmic
3 core radiator
2 way diff
tein coilovers
full exhaust
air intakes
twin plate clutch
and other little things

thank you for any insight

Aaron Cake

iTrader: (1)

With no previous tuning experience, it's best to stick to non-critical areas like idle, low load and cruising. You'll be hard pressed to cause damage there and at most, will likely cause yourself annoyance in having to fix problems you created while experimenting.

As for wide open throttle, it's best to have someone with some experience doing the tuning or at least guiding you. Tuning a rotary is a bit different than a piston engine in that you must run more conservative timing, there is trailing ignition to deal with, secondary injectors, and A/F ratios are normally run richer for a margin of safety.

derk_dkb

thanks for the info
with the mods i have now, what size injectors would be adequate? i dont want it to start running lean

Aaron Cake

iTrader: (1)

Off hand I don't know because I don't have experience with the PFC and don't know what duty cycles it is limited to, if any. The stock injectors are good to about 300HP if you can run high duty cycles.

Dinnertime

If you have no tuning experiance I would suggest not messing with it, or finding someone who will teach you. It not hard to mess things up badly if you were to tune it improperly.

gracer7-rx7

iTrader: (16)

It is not easy to learn how to tune. You really need to understand what is involved in proper mapping of a car's fuel map, timing maps and all of the various parameters involved in the rest of the map. It can be a very expensive lesson that could easily result in a blown motor. Especially on turbo rotaries since these engines do not tolerate poor tuning or mistakes in tuning and will blow very quickly.

I suggest researching the topic further by reading threads in the 3rd gen FAQ and also in the Power FC section of this forum. Be aware that many people make it sound easier than it is.

For fuel, the stock system does not have any overhead to support higher than stock boost. With a full exhaust (no cat) you risk running more boost than the stock fuel system supports. Most guys running sequential twins eventually have the stock 850cc secondary injectors bored out to 1200cc or 1300cc and have the map tuned to that size injectors.

all rotor

Rotary tuning is tricky .....

sick_dippin

go to your local community college, hopefully they have a decent auto technology dept that hasn't been hacked to crap by budget cuts.
Take a class on fuel injection systems.

KingBennon20

Pay the $250 and ask if you can watch then ask questions. Some people don't mind

Demyan

its better off having someone else who knows what there doing to it, unless your really confident and know what you are doing lol

sick_dippin

You will learn NOTHING like that.
You need to understand the technical side of things and it's very complicated.
You need to have a thorough understanding of ur air fuel ratio numbers to the amount of boost and timing curve.
This is not easy stuff and nothing you can learn from asking questions. In fact that might just help make you more lost.
You need to have a textbook understanding of this stuff.
It's no joke. One wrong move in the settings and you can blow up a motor with thousands of dollars invested in it.


this isn't a trade you want to learn the easy or the fast way. Make sure when the time comes to start doing ur own tuning that you;re confident in ur understanding of everything so that you have no doubts in what you're doing.

Good luck, it'll be fun in the end.

dohtem8

iTrader: (17)

You can tune it yourself, but it would be best to take it to a professional to do it.

Aaron Cake

iTrader: (1)

Who is only charging $250 to tune a car?