nice post yaar
yes the kwp2000 unit can read the onchip map. and backing it up is our headache. lolz.
it can write user defined maps also.
i also support the RD piggybac ECU its good stuff. but its written mainly for the EDC16C39 units of swift CRDi i presume.
the turbo is a korean one meaning its not going to be as good as the Garret. ( lets face the facts!)
what i suggest is to just make th existing set-up run smoothly with the advantage of the added intercooler.
once there is a proper turbo upgrade it will be ok to go for higher boosts.
the one safe bet would be to go for the VGT on the Sonata it costs 75k rs from OEM hyundai. it might be available for 60k from grey market. but then the ECU is EDC16 unit. and the gear box also would have to be changed.( if one pans to use the same ECU. it will have the Gear Shift Hrmonisation Demand. set for Tra_num gear ranges 1-6!) too much headache.! a proper Garret turbo is required if real mods are to be tested to its limits.
and hey back pressure will be a hassle in case of petrol engines. in diesel its not much much of a problem right??
i suspect that the RD unit is universal type. will go with any CRdi unit!
irrespective of the ECU generation..
the thing is with the boost setup. if its according to gears then it will be well sorted in that the turbo will be under max load only when the car is in fifth gear. and so are other components.
what about the piping and stuff! if the turbo is to be run in higher boost all the time then the first thing should be to get the piping and related stuff done up.! ( even for the gear related boost settings also the safe way is to do reinforced piping!)
and just a thing. i am pretty sure the car would be topping out to 220kmph most of the times. so there wont be much to do in increasing the top whack unless a custom gear box with longer gearing is considered. but as far as i know no one makes custom gearbox for the elantra! even a stage 2 clutch will have to be fabricated custom!!.
so lets leave that.
the only thing now left with current turbo would be to increase the acceleration figures!
here there are limitations.
this is diesel teritory
4500rpm and you are off. !!
so the trick is to do the mods keeping in mind the low end torque!( mid range will be awesome anyways. top end can be done using the boost controller)
two ways to increase it.
either increase the MI1 injection duration and the Poi2 injection duration( already being done by the injectors via the tuning box!)
or increase the feul injected per second ( bigger injectors!!) there is a catch here. only if the injectors( bigger ones run off the same current level, they can be run by the ECU other wise an amp would be needed! but still the EDC15C2 unit would have to be reflashed with new parameters taken into account i menat the ZFC ( zero feul correction) and hell lot of other parameters.
this approach would be too much time consuming and difficult to approach. ( only if the system was simple as a normal DI engine. this would have been possible rather easily. lol)
so lets stick to the first approach.
this will be possible as two maps will do the trick( there are a lot of submaps involved but yes it can be done rather easily)
the FMTC map and the Energization map of the solenoid valves.
the valves are energised( started to energize SOE) by dynamic interupts that occur when the Crank shaft reaches a particular angle. ( there are time based calculation also..lets not go that technical now.)
so the remapping can be done two ways one make the FMTC map such that the Main injection is prolonged more than normal( simply feed the input to maps as more torque is requirred) the map gives an output to vale Energization map this much quantity of feul is required and for injecting that much quantity of feul valves must be open for longer time which the ECU will take care of Provided the DRY conditions are not violated( mainly cylinder capacity and load capacity and injection overlapps also)
the next one is down right dirty and dangerous method. the .c file itself is modified so as to produce a dynamic interupt! at a before angle. than normal crank shaft angle. so what happens instead a normal injection( MI1 supposed to start at X degree of crank shaft, will start at an angle X-Y degree!!) and hence in effect we get an early injection( iif not done properly there will be misfiring! - this is risky business and only well certfified guys like me or typically CALIBRATION ENGINEERS can do this. and that we do it with real time logging from Closed loop VIVA lab car or actual vehicle!!)
here the advantage is that the low end torque can be made to come through from almost as low as 400-500rpm from idling i.e the shove will be felt from 1400rpm till 4.5Krpm!!
so wish brraj all the best for the build of the fastest Elantra CRDi from the south!! lets wait and see..
gonna watch a movie now. bit lazy
cheers
sameel