TT-DEK Posted March 17, 2007 Share Posted March 17, 2007 Recently fitted above. Things seem ok, but when the loud pedal is pushed and number 2 tubby kicks in the reading goes a little silly. It hits 10, quite quickly but i can sense it would go lower if display would let it? Can anyone advise if this is ok, or not, appreciate your help, thanks. Link to comment Share on other sites More sharing options...
Marty Posted March 17, 2007 Share Posted March 17, 2007 Im no expert mate, but 10 is way too rich, should be running in mid 11's when on boost 'i think' but im probably wrong dont know too much about the afr's on twins. Link to comment Share on other sites More sharing options...
Jake Posted March 17, 2007 Share Posted March 17, 2007 There was a similar thread to this yesterday: http://www.mkivsupra.net/vbb/showthread.php?t=103320&highlight=aem Link to comment Share on other sites More sharing options...
Marty Posted March 17, 2007 Share Posted March 17, 2007 There was a similar thread to this yesterday: http://www.mkivsupra.net/vbb/showthread.php?t=103320&highlight=aem jee, didnt realise the standard twin turbo map ran them so rich. Link to comment Share on other sites More sharing options...
TT-DEK Posted March 17, 2007 Author Share Posted March 17, 2007 I have 550 injectors in, running just over 400 ish, so duty / cycle should be well within? Am i making sense there?? Link to comment Share on other sites More sharing options...
Jake Posted March 17, 2007 Share Posted March 17, 2007 I have 550 injectors in And it's a j-spec is it? What are you using to trim the injectors? Link to comment Share on other sites More sharing options...
Mcgoo Posted March 17, 2007 Share Posted March 17, 2007 I asked similar questions when I fitted mine last year. In the 10s means its running rich - which is safe but leaning it out alittle will give you more power. I don't think this can be done without having some sort of fuel control though. I think there is a few threads on AFR's. Have you tried a search? Link to comment Share on other sites More sharing options...
TT-DEK Posted March 17, 2007 Author Share Posted March 17, 2007 And it's a j-spec is it? What are you using to trim the injectors? Yeh, J spec. I have the Apexi safc-2 but havn,t got a clue how to adjust things? Link to comment Share on other sites More sharing options...
Jake Posted March 17, 2007 Share Posted March 17, 2007 Then you need to get the SAFC set up right. I know people say that rich is better than lean but too rich can lead to bore wash and that's an engine killer too. Link to comment Share on other sites More sharing options...
TT-DEK Posted March 17, 2007 Author Share Posted March 17, 2007 OK. Looks like i will have to keep off no 2 for a short while? cheers buddy.. Link to comment Share on other sites More sharing options...
Jake Posted March 17, 2007 Share Posted March 17, 2007 I would, until you can confirm what the actual AFRs are. That's the problem with the AEM UEGO; you can't tell if the AFR is 10:1 or 8:1 If it's 10:1 you'll be alright but if it's actually a lot richer . . . . Link to comment Share on other sites More sharing options...
TT-DEK Posted March 17, 2007 Author Share Posted March 17, 2007 When i was looking at it, it seemed to hit 10 in no time? but seems to run really well though? Link to comment Share on other sites More sharing options...
Ian C Posted March 17, 2007 Share Posted March 17, 2007 Most AEMs bottom out at 11.2:1 but I've seen some only get to 11.4:1 and others hit 10.8ish. It's annoying when you are aiming at 11.4:1 or thereabouts but haven't got a clue how far past that you are! The stock map runs mad rich when on boost. You can pull fuel from it quite safely. Aim for 11.4 to 11.8:1 and you'll feel it's noticeably sharper. You can run all the way to mid 12's but that's when you are pushing it. mid 11's is safer with minimal to no loss of power. 10's are daft unless your intercooler is shot or you are on boost for a long period. If you reach 9:1s you get a marked dropoff in power and it goes flat. 8:1 and you get misfires due to the mixture not even igniting. It's around these areas you are chancing borewash over the short term. Mid 10's are how Toyota run the blighter so I wouldn't fret over that -Ian Link to comment Share on other sites More sharing options...
TT-DEK Posted March 17, 2007 Author Share Posted March 17, 2007 Cheers Ian. Funny you should say that as when i put it in manual, and first or L, then hit the pedal i seem to get overfuelling? misfire as you said, so its got to be mad rich i,d say? Can this be tweaked with the SAFC-2 easily enough? or does it need mapping again totally? Link to comment Share on other sites More sharing options...
Ian C Posted March 17, 2007 Share Posted March 17, 2007 Mmm actually I'd say that may be something different - overfuelling issues tend to show up when the engine is under more load that 1st gear... Have you got RLTC? You need someone to look at your car who knows how piggybacks work and how more specifically an AFC works. You can't "tweak" out an overfuel, it's a sweeping problem across a reasonably large part of the map. -Ian Link to comment Share on other sites More sharing options...
Ian C Posted March 17, 2007 Share Posted March 17, 2007 Actually if you post the Hi and Lo throttle settings and the NE-point configuration off your AFC I can give an educated guess if it's going to work or not -Ian Link to comment Share on other sites More sharing options...
TT-DEK Posted March 17, 2007 Author Share Posted March 17, 2007 HI Ian. That sounds so easy buddy, but im totally useless with that apexi? The only way i could do this is to actually ring you and you talk me through it, whilst sat in the car?? YES i know, im useless, If you have a mobile? and let me know if/when you have a couple of mis, i can call you:innocent: Link to comment Share on other sites More sharing options...
tDR Posted March 17, 2007 Share Posted March 17, 2007 I see mid to low 10:1 range when on tubby 2 at BPU ish level. Still on 440's. This is normal from what I've seen of many cars of similar spec and as Ian says, there is some power to be had safely from trimming some of the fuel out. Exactly why I've gone for a MAP2 piggyback.... will see how I get on with it shortly. Cheers, Brian. Link to comment Share on other sites More sharing options...
TT-DEK Posted March 17, 2007 Author Share Posted March 17, 2007 I feel a bit of a fool? Since my last mapping i have since disconnected my W/I because i didn,t want the mix to ice over in the pump when it was really cold an icey? THIS will change things a little? wouldn,t it? Please advise? Link to comment Share on other sites More sharing options...
TT-DEK Posted March 17, 2007 Author Share Posted March 17, 2007 OK, re-connected W/I took it out for a short blast and no difference? ON idle readings 14.6 - 15.00 6/7 rpm. Link to comment Share on other sites More sharing options...
baldy Posted March 17, 2007 Share Posted March 17, 2007 if its running that rich could you wind the boost up to lean it off? Link to comment Share on other sites More sharing options...
TT-DEK Posted March 17, 2007 Author Share Posted March 17, 2007 I think its running at 1.2 ish already? Unless the SAFC-2 will let me do this? I,d need guidence with it also. Not good with electrical toys?? Link to comment Share on other sites More sharing options...
Sean1933 Posted March 17, 2007 Share Posted March 17, 2007 If its a j-spec then 1.2 is your limit...anything after that and your risking serious turbo failure! Link to comment Share on other sites More sharing options...
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