Power Loss On Downshifts, Bouncing Idle And Slight Hesitation At Specific Rev Point -R34Gtt

[rondofj]

JPEGS now

[Ben C34]

What do you think that tells you?

[Dose Pipe Sutututu]

that map looks fine to me, RB25 motors all have that timing "wedge" which then decays as RPM increases

[XGTRX]

So this is your tune?

[rondofj]

I wouldnt be best placed to comment - hence my posting - waiting for the gurus GTSBoy, Scotty, BadGaz, XKLABA and others...does it (my maps) look alright?

[rondofj]

that map looks fine to me, RB25 motors all have that timing "wedge" which then decays as RPM increases

It looks odd to me though, but then again I wouldn't know if its normal as you said..

[XGTRX]

I wouldnt be best placed to comment - hence my posting - waiting for the gurus GTSBoy, Scotty, BadGaz, XKLABA and others...does it (my maps) look alright?

Is this a tune or log?

[Ben C34]

Is this a tune or log?

It's the timing and fuel maps....

[Ben C34]

My eyeball dyno says they are fine.

[Badgaz]

Yeah the data looks fine and your shown us all your other fuel corrections..... AFM... Noticed someone is having a sale on afms in the for sale section.

[XGTRX]

It's the timing and fuel maps....

As mentioned previously you need a LOG if you want to find out exactly what is happening.

[Dose Pipe Sutututu]

things I've suggested already in previous posts.

• get a datalogit kit
• get a wideband
• produce a log

myself and other members will analyse - looking at the timing map & fuel maps is one thing, but they both look normal to me.

Here's mine for reference (but it's on E85):

[XGTRX]

things I've suggested already in previous posts.

• get a datalogit kit
• get a wideband
• produce a log

myself and other members will analyse - looking at the timing map & fuel maps is one thing, but they both look normal to me.

Here's mine for reference (but it's on E85):

E85 SS2.png

28 pages of information condensed into one simple action plan...this is all that you need to do before anything else.

[Badgaz]

Another option is to run a volt meter from AFM to in car and watch that

Edited August 20, 2014 by Badgaz

[rondofj]

I have been monitoring AFM voltages with the commander - idle is always alternating 1190-1250V ish, and I had to switch my afm warning off in powerfc because high rpm/boost runs always bring on the engine light at 4.8V+ in 2nd and 3rd. AFM voltage peaks too much, AFM settings is actually 100% for every voltage readout uptil 5.12V in the afm calibration table.

Datalogit kit is money wasted just to diagnose a problem, I dont even have a laptop haha, will a wideband with gauge just do? Johnny I wana borrow your AFM for 30mins on the weekend lol

[GTSBoy]

FWIW, 4.8v on a Z32 is supposed to be ~300rwkW.....so nothing unusual there.

[Dose Pipe Sutututu]

saturday arvo works - you will owe me a 6 pack of James Squire or so

another easier way, buy an ECU that uses a MAP sensor.. you won't have these AFM issues and reversion issues

[rondofj]

I found that 'wedge' on the timing map is because of the two timing values 30 on the N20 cell highlighted here (highest rpm/ lowest load). I can smooth that out- dunno why they left such a big jump but I doubt that will make the map any 'better' - when does anyone ever reach redline at min load?

[GTSBoy]

when does anyone ever reach redline at min load?

Overrun/overrev on downshift.

Also, and by the way, when you say "wedge" do you mean the ridge of high timing running along the top, or do you mean the little dip right at the end closest to the viewer?

[rondofj]

Not exactly a map tracer but this table shows where my map tracer cells roughly are during a normal drive(top yellow blob) and then downshifting (bottom blob) this is where they go and the car becomes an ass for 4-5 seconds...

Edit - I would probably move that second blob 3 cells down - thats more where it goes to.

Edited August 20, 2014 by rondofj