Notices
Engine Management and ECU Remapping This section is to discuss the various aspects of engine management modification for your Subaru.

Apexi PFC v5/v6 MAF Settings

Old 10 January 2019, 11:34 AM
  #1  
hamzi95
Scooby Regular
Thread Starter
 
Join Date: Dec 2015
Location: Leicester
Posts: 162
Default Apexi PFC v5/v6 MAF Settings

Hi all,
Just wondering if anyone has a apexi pfc v5/v6 and has access to a hand controller, and if so, can let me in on the MAF settings used on all 3 options. so voltage and %, it would be most appreciated.
Thanks.
hamzi95 is offline  
Old 12 January 2019, 10:52 AM
  #2  
bludgod
Scooby Regular
iTrader: (3)
 
bludgod's Avatar
 
Join Date: Feb 2007
Location: Belfast
Posts: 1,747
Default

is it the maf trasnfer curves your after for standard/power/vg30 ?
Attached Files
File Type: txt
PFC-MAF.txt (956 Bytes, 0 views)

Last edited by bludgod; 12 January 2019 at 10:53 AM.
bludgod is offline  
Old 13 January 2019, 12:37 PM
  #3  
hamzi95
Scooby Regular
Thread Starter
 
Join Date: Dec 2015
Location: Leicester
Posts: 162
Default

Originally Posted by bludgod View Post
is it the maf trasnfer curves your after for standard/power/vg30 ?
Yes thank you, i have recently acuired a v2 ra witth v5/v6 apexi pfc loom and ecu. It has yellow injectors, 2.5 botttom end and 2.0 top end. I have a apexi cable coming on monday and i would like to have a map which is ok enough to drive to my mapper. Due to the nature of my mapper he dosent map around problems so i'd like to try and diagnose and fix all issues myself.

I had a jumpy idle which has been fixed by throwing in a z32 maf and using the vg30 settings.

Just on the hunt to find out roughly what kind of timing this engine likes, i will get my wideband hooked in.

Right now the car is stinking of fuel, which is a suprise because they are stock yellow injectors, unless they have been re'cc'd, so the next task is to fish around for any vac leaks (currently idling on -0.55 on the boost gauge) my old scooby was -0.6) and then figuring the injectors out.
hamzi95 is offline  
Old 14 January 2019, 12:16 PM
  #4  
bludgod
Scooby Regular
iTrader: (3)
 
bludgod's Avatar
 
Join Date: Feb 2007
Location: Belfast
Posts: 1,747
Default

when you get your cable then check the air fuel corrections from the front o2. if they are all massively negative then its possible you have reflowed injectors or maybe even the fuel pressure has been tampered with. for timing I would just load the stock map and reduce by 5 degrees. keep it off boost if you have to drive it to the mapper and let them do their thing.

happy to look at a logfile for you if you want to email it through.
bludgod is offline  
Old 14 January 2019, 12:39 PM
  #5  
hamzi95
Scooby Regular
Thread Starter
 
Join Date: Dec 2015
Location: Leicester
Posts: 162
Default

Originally Posted by bludgod View Post
when you get your cable then check the air fuel corrections from the front o2. if they are all massively negative then its possible you have reflowed injectors or maybe even the fuel pressure has been tampered with. for timing I would just load the stock map and reduce by 5 degrees. keep it off boost if you have to drive it to the mapper and let them do their thing.

happy to look at a logfile for you if you want to email it through.
Hi little update,
Cable is in the post so i shall do that.

The car is idling perfectly now that i have swapped 2 faulty coil leads, and swapped back over to v6 maf with power intake settings on the hand controller. The car isnt bucking or anything of the sort like before, just stinks of fuel, im thinking they are reflowed injectors too because even on the stock man for ej207 the car stinks of fuel.
hamzi95 is offline  
Old 14 January 2019, 06:15 PM
  #6  
bludgod
Scooby Regular
iTrader: (3)
 
bludgod's Avatar
 
Join Date: Feb 2007
Location: Belfast
Posts: 1,747
Default

if your unsure about the injectors I would recommend having them cleaned and flow tested before your mapping day. the flow test will give your mapper a headstart on setting up the car and you'll have price of mind that all four cylinders are working as they should.
bludgod is offline  
Old 15 January 2019, 08:09 AM
  #7  
hamzi95
Scooby Regular
Thread Starter
 
Join Date: Dec 2015
Location: Leicester
Posts: 162
Default

Originally Posted by bludgod View Post
if your unsure about the injectors I would recommend having them cleaned and flow tested before your mapping day. the flow test will give your mapper a headstart on setting up the car and you'll have price of mind that all four cylinders are working as they should.
What cut injectors still allow the car to idle near enough perfect? Wouldnt the car have trouble starting ?
hamzi95 is offline  
Old 15 January 2019, 11:17 AM
  #8  
bludgod
Scooby Regular
iTrader: (3)
 
bludgod's Avatar
 
Join Date: Feb 2007
Location: Belfast
Posts: 1,747
Default

not sure what your asking about "what cut injectors" - if the injectors are too big for what the ECU is calibrated for then the car will have difficulty idling. Once the ECU is configured to use those injectors then idle/cruise should be all good.
bludgod is offline  
Old 15 January 2019, 11:26 AM
  #9  
hamzi95
Scooby Regular
Thread Starter
 
Join Date: Dec 2015
Location: Leicester
Posts: 162
Default

So if its idling perfectly does that mean the injectors are stock 440cc and that they have not been reflowed?
hamzi95 is offline  
Old 15 January 2019, 11:54 AM
  #10  
bludgod
Scooby Regular
iTrader: (3)
 
bludgod's Avatar
 
Join Date: Feb 2007
Location: Belfast
Posts: 1,747
Default

no if its idling perfectly that only means it's idling perfectly, you need the wideband to confirm what the AFR is and also to see the ECU corrections from the o2 sensor to see if they are within the spec of a normal car. Even then, you could be partly running on 3 cylinders with larger injectors and 1 broken but the overall result is read by the o2/wideband as correct. The only true way to know what the injectors are flowing is to test them individually, anything else will only give you a rough approximation.
bludgod is offline  
Old 19 January 2019, 05:20 PM
  #11  
hamzi95
Scooby Regular
Thread Starter
 
Join Date: Dec 2015
Location: Leicester
Posts: 162
Default

hi bludgod,
I got my hako cable and managed to connect it to the fc edit software, I have also taken a datalog.

the o2 sensor voltage is >0.7v on idle, fluctatues back to 0 (which im assuming is the short term FT trying to pass the value to the LT fuel trim) I have attached a log.

My next port of call is getting my wideband moved on from my old car, ive also brought a new sensor as the old one was messed up.

The car is idling stably and its travelling across the rev range nice and easily, without any hesitation or bucking. However i dont have big enough ***** to get high into boost without seeing my AFR's.

Based on the assessment of the AFR's im going to get the injectors CC'd, if it was way out, i think i will just purchase nismo 550cc injectors and get them sent for flow testing and cleaning as they will be much happier at around the 340 bhp mark than stock yellows.

I dislike modified injectors so i dont see the value in sending these(yellow) ones for cleaning when i have working yellow ones in my other subaru.

In regards to the log, the only thing which is worrying me is the ignition timing which seems to be all over the place.
Attached Files
File Type: txt
O2S.txt (235.9 KB, 0 views)

Last edited by hamzi95; 19 January 2019 at 05:22 PM.
hamzi95 is offline  
Old 21 January 2019, 09:59 AM
  #12  
bludgod
Scooby Regular
iTrader: (3)
 
bludgod's Avatar
 
Join Date: Feb 2007
Location: Belfast
Posts: 1,747
Default

in that log your already seeing a knock count of 4 so I'd be tempted to leave it alone until you get the wideband on or reduce the timing by a few degrees.

You can see the o2s value moving around as it should at idle from lean to rich and back again so that all looks normal enough. The ignition timing at idle is supposed to move around it's part of how the ECU controls idle by adjusting the idle valve to control air and adjusting the timing and fuel to suit.
bludgod is offline  
Old 21 January 2019, 10:14 AM
  #13  
hamzi95
Scooby Regular
Thread Starter
 
Join Date: Dec 2015
Location: Leicester
Posts: 162
Default

Yeh i suspect that random knock noise is because of a dodgy power steering pump pulley.

Im trying to find a ignition map table from a 2.5 hybrid motor so i kinda know roughly what values to push in the table for now.

so i can create my own little knock map, id like to plot rpm (x-axis) to load (y-axis) however which field correlates to the load(P0-P20)? im assuming it is airflow, if so, how do i convert the airflow values to the (P0-P20).... etc on the hand controller/ignition table ?

Thanks

Last edited by hamzi95; 21 January 2019 at 10:25 AM.
hamzi95 is offline  
Old 21 January 2019, 10:31 AM
  #14  
hamzi95
Scooby Regular
Thread Starter
 
Join Date: Dec 2015
Location: Leicester
Posts: 162
Default

Originally Posted by hamzi95 View Post
Yeh i suspect that random knock noise is because of a dodgy power steering pump pulley.

Im trying to find a ignition map table from a 2.5 hybrid motor so i kinda know roughly what values to push in the table for now.

so i can create my own little knock map, id like to plot rpm (x-axis) to load (y-axis) however which field correlates to the load(P0-P20)? im assuming it is airflow, if so, how do i convert the airflow values to the (P0-P20).... etc on the hand controller/ignition table ?

Thanks
In response to all of this, i am backing all fields which have 40+ timing back down to 40 and then i will smoothen out the reduction of timing to the current high load/high rpm timing of 21 degrees, save the map, and then pull all fields back by 4 degrees of timing. Get my AFR gauge in, try to DIY set of cheap det cans and find the knock limited timing of the motor on light throttle then interpolate and extrapolate systematically, double checking each of the cells with the help of brake boosting.
hamzi95 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
StickyMicky
General Technical
0
03 September 2008 01:30 PM
robsw
General Technical
11
07 July 2008 11:52 AM
bryhp
General Technical
6
25 February 2008 04:04 PM


Thread Tools
Search this Thread
Quick Reply: Apexi PFC v5/v6 MAF Settings


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.