RONIN FC

Sorry for thread jacking. But i have a question along the lines of this thread and may be helpfull for the original poster to find an ECU.



As I recall, the Ren has 6 injectors. How are they sequenced? Primary, then 4 secondaries, or primary, secondary, then "aux" injectors?

j9fd3s

the service highlights book and the yamaguchi rx8 book say 2 different things.



yamaguchi says that all the injectors turn on @3700



service highlights says:



"when the amount of fuel demand from the engine is low, only the primary 1 injectors inject fuel. When the amount of fuel demand from the engine increases, fuel injection in the order of secondary injecto and primary 2 injector (high power) begin injection"



i think they say the primaries are on, then the secondaries, then the primary 2 come online

sen2two

i have seen the whole stepper motor thing before in other threads. i dont really understand it. what exacty are they, how do they work? and also, what is a fly-by-wire throttle cable. and how does it differ from others.





about the tranny for a TII, theres no difference between push and pull type here? to mount up to the renesis?

j9fd3s

the fd is a pull type clutch, everything else is a normal push type. the throwout bearing pushes on the pressure plate. the renisis actually just uses a t2 clutch.



instead of a throttle cable the rx8 uses fly by wire, there is a sensor on the gas pedal, that tells the ecu what your foot is doing, then the ecu outputs to the throttle body, which has a stepper motor to move the throttle plate around.



a stepper motor, is an electric motor that is able to work in steps, instead of turning full revolutions in one direction or the other, they are able to turn partial revolutions, in either direction. the 89+ metering pumps are stepper motors. to run the throttle takes a pretty good ecu, the e11 haltech can run the metering pump, but its not fast enough to do the throttle

sen2two

thanx...i feel smarter already. lol...



do you think the Microtech LT10 could control the stepper motors and the metering pump? or is this a question i should direct towards Microtech-efi.com?



couldnt i cancel out the stepper motor for the throttle, and run my own cable? and stepper motor for the 6 ports.....with a custom intake manifold, that would be obselete also, right? (something like a weber carb lower manifold, with 2 individual throttle bodys adapted) after that....any full stand alone ECU should be good. unless i got this whole "get rid of the stepper motors" idea wrong.

sen2two

also...how much for the renesis it self? with harness and anything else i will need.



and is mazda letting these things go, or am i on a hunt for one?



and when bolting the motor to the TII tranny, with a TII clutch, i guessing i would also use a TII flywheel.?.?

sen2two

[attachment=39125:attachment]



something like this, with a home made Lower intake manifold....

j9fd3s

motor rebuilt is $2600, its just the block too



the rx8 and t2 use the same clutch, so you would use the rx8 flywheel

j9fd3s

i dont think microtech can do it, you would have to convert to cables or something

sen2two

what do you mean "convert it to cables"? im not following here. sorry. can i not just cancel out the stepper motors if using the custom manifold and throttle bodys?