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Apexi PFC v5/v6 MAF Settings

Old 10 January 2019, 12:34 PM
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hamzi95
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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.
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Old 12 January 2019, 11:52 AM
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is it the maf trasnfer curves your after for standard/power/vg30 ?
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Old 13 January 2019, 01:37 PM
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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.
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Old 14 January 2019, 01:16 PM
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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.
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Old 14 January 2019, 01:39 PM
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hamzi95
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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.
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Old 14 January 2019, 07:15 PM
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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.
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Old Yesterday, 09:09 AM
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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 ?
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Old Yesterday, 12:17 PM
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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.
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Old Yesterday, 12:26 PM
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So if its idling perfectly does that mean the injectors are stock 440cc and that they have not been reflowed?
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Old Yesterday, 12:54 PM
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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.
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