Power Fc D Jetro Help

[fake400r]

Hi Guys,

I recently took ownership of an R34 GTR with 2350s, upgrade cooler, exhaust, fuel system, clutch, etc. It should be good for over 300kw at the treads and it is. However i have hardly driven it because i have pulled it apart purely to race it, so no interior etc. Had it on the dyno the other day and it would not go past 150km/hr or 6k rpm. We then reinstalled the GTR MFD and it then went to 204km/hr and not past 6k rpm. It did make 316kw though.

My tuner messed around with it for a while and we changed a map from another GTR into it and that got it revving to 8k like it should. However all of the PIM voltage settings have been changed by the last tuner and we think this has caused all of the dramas.

Does anyone have any information on how these work.

I am also after the standard Power FC D Jetro map with all of the PIM settings unchganged. Does anyone have this or know where i could get one from?

I am a bit unsure about the tech side of this, but would love some help as i need to get my car running. The tuner i use is the same guy i have used for years but his experience is with motec, autronic and normal power fc and he has little experience with the FC jetro and the PIM settings.

Unfortunately i am not in a financial or time position to do the upgrade to Motec M800 like i want so need to get this sorted this week,

Any help would be greatly appreciated.

Matt

[paulr33]

if you want std maps on the powerfc djetro (or any powerfc for that matter) you simply do a DATA INIT to reset it back to default map apexi shipped it with

if you need more help i would suggest reading powerfc FAQ in my sig, all the info is in there

but essentially if you want std maps (blow away current tune) you can do DATA INIT

if you are unsure or want to practice

try

http://www.paulr33.com/powerfc-emulator/menu.html

[fake400r]

so this will reset all of the PIM voltage settings back to what Apexi sent the ECU out with?

[paulr33]

yep

DATA INIT erases every setting on the powerfc back to default maps apexi shipped it with

make sure you do the following after DATA INIT, but before you start the car the first time

you read the powerfc faq BEFORE you do it

make sure

- set injectors if non std

- set map sensors if non djetro std

- set boost control kit on/off

- learn how to do self idle adjust

[fake400r]

Thanks Paul,

Your a star.

For my own information what is the purpose of the PIM voltage settings and do they need to be changed from what apexi ship it with?

My tuner was talking about a scale that may be availabe that shows rpm vs voltage?

[paulr33]

the PIM is the scale and offset for the map sensor

this allows you to run non std map sensors and scale it accordingly

ie the std map sensor is 3 bar (peaks at 2bar boost) and has whatever offset and scale apexi set it to

if you run a 4 bar map sensor (peaks at 3bar boost) then you need to adjust the scale and offset

because both map sensors only go from 0v to 5v but one is 3 bar sweep and the other is 4 bar sweep

so this allows you to get it so that with map sensor #1 1.2bar is say 2.1v and map sensor #2 is 1.2bar is 1.6v

so its only used to run larger map sensors

if you want more tuning resolution you need to edit the RPM and Load axis ramp to give you more or less load points

so lets say you want 10k RPM limit you can leave as default and change upper ceiling RPM limit

and youll use the same value from 8k to 10k or if you want to use more cells in that range (as most would)

then you grab the RPM ramp in FC Edit (need datalogit) and scale it outself so that the 20 cells range form 0rpm to 10,000rpm

[fake400r]

thanks paul.

You have been a great help.

[Adriano]

I would write down all the values in the maps before you reset it for future reference. If it has stock map sensors then there are no real tricks to tuning one over a normal pfc. Just hope he has datalogit, makes it 1000 times easier.

[RRob]

Make sure the map sensors are installed correctly into ports 3 and 4, and double check the wiring is correct also.

[DVS JEZ]

save the tune into the tuners laptop then data int to get it back to the factory tune,

RR84 WA

he has run a different tune with good results so it must be a tune issue

[fake400r]

thanks guys.

we have already saved that file for the tune thats in the car.

We just want to start again fresh as the last tune done before i bought the car was a bit of a shambles.

Matt