upgraded injector values
A vr5 STi njector is rated at 550cc right? So if swaping for a 720cc , what would be the new values?
Should be less than 100% and buggers me about the latency values too. . . Currently I just put it at 65% and +0.03ms BUT its still spewing black smoke at the exhaust AND u could smell fuel frm the engine bay |
[url=http://paulr33.com/powerfc-faq/powerfc-faq.htm#57]Apexi PowerFC FAQ[/url]
The yellow injectors you pulled out should be 440's not 550's I believe. The injector size correction number seems close enough. It should be 61 though. The latency correction will depend on the brand of injector that you had / changed too. Is your MAF ok? |
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[QUOTE=RoughStilin;717033][URL="http://paulr33.com/powerfc-faq/powerfc-faq.htm#57"]Apexi PowerFC FAQ[/URL]
The yellow injectors you pulled out should be 440's not 550's I believe. The injector size correction number seems close enough. It should be 61 though. The latency correction will depend on the brand of injector that you had / changed too. Is your MAF ok?[/QUOTE] its a top-feed Greddy 720cc ...suppose ur right as i changed it to 61% today; less black smoke, also changed the latency correction to +0.24ms...a guestimation..the exhaust 'sounds' better than previously...still need to get the correct latency figures... |
The correction factor for the sizing will go from what injector size the car with from factory, not what injectors were last in the car though.
Any information I am giving you on here is not to be taken as being true, you will have to check for yourself. You really need a wide band & correct latency values to be messing with this stuff though. There is a very good chance you will do damage. Also those injectors in the photo, if they are the ones you are replacing are side feeds not top feeds. I believe the correction should be 0.13. But YOU need to check this. Injector latency - You will be looking for 720cc Denso injectors. Greddy are just rebranded Densos. [url=http://injector-rehab.com/shop/lag.html]Fuel Injector Lag Time[/url] |
[QUOTE=RoughStilin;717178]The correction factor for the sizing will go from what injector size the car with from factory, not what injectors were last in the car though.
Any information I am giving you on here is not to be taken as being true, you will have to check for yourself. You really need a wide band & correct latency values to be messing with this stuff though. There is a very good chance you will do damage. Also those injectors in the photo, if they are the ones you are replacing are side feeds not top feeds. I believe the correction should be 0.13. But YOU need to check this. Injector latency - You will be looking for 720cc Denso injectors. Greddy are just rebranded Densos. [url=http://injector-rehab.com/shop/lag.html]Fuel Injector Lag Time[/url][/QUOTE] Tnx a million m8! Done the research and now its running at 61%/0.12ms . . .tho my IGN/INJ temp corr still at +2/0.859 as theres still black smoke at the xhaust (rich) . . .mybe it IS the o-rings that fcuked up. PS. 0.8bar/6 knock ..without really testing it hard PPS. Xtra black fumes during gear change (3rd) under mdium load (3,500rpm) ...yep I know, BOV vents to atm |
Can you post up a screen shot of your fuel map?
Have you access to a wideband sensor / gauge? |
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[QUOTE=RoughStilin;717570]Can you post up a screen shot of your fuel map?
Have you access to a wideband sensor / gauge?[/QUOTE] here's the model & IGN map [ATTACH]9428[/ATTACH] [ATTACH]9429[/ATTACH] [ATTACH]9430[/ATTACH] here's the INJ map [ATTACH]9431[/ATTACH] [ATTACH]9432[/ATTACH] |
5 Attachment(s)
additional INJ map;
[ATTACH]9433[/ATTACH] [ATTACH]9434[/ATTACH] [ATTACH]9435[/ATTACH] [ATTACH]9436[/ATTACH] [ATTACH]9437[/ATTACH] |
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the final INJ map for a 15 x 15
[ATTACH]9438[/ATTACH] :confused::confused::confused: |
The fuel map looks "OK". You need to do one of 3 things as I see it.
1. Go to a proper shop & get it checked / tuned. 2. Plug in a wideband AFR meter and actually have a look at what the car is doing. 3. Consider you may have a problem with your MAF / AFM also causing over fuelling. There are other parameters too in the FC that can make a change in fuel settings, such as TPS, Accel Inj, cold start enrichment..... All of these need to be changed using either Apexi software or a Datalogit. Are you in Perth or Brunei? |
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