Guest begone Posted December 6, 2005 Share Posted December 6, 2005 I was told that I could - if I wanted to, pretty safely run some 550cc Injectors, with a Fuel Pressure Regulator, and a T61 ALL on the Stock JDM ECU with no piggy backs or any fuel management. Is this True? Can it be done? I was told the JDM ECU will run the 550's but I'll run rich up top. Has anyone tried this? My JDM Twins are leaking oil and I'm either going to replace them or go Single. Thanks. Link to comment Share on other sites More sharing options...
Darren Posted December 6, 2005 Share Posted December 6, 2005 You would normally need a SAFC with 550 injectors. No expensive really. Otherwise it would probably run rich on the bottom not top IMO. Link to comment Share on other sites More sharing options...
Alex Posted December 6, 2005 Share Posted December 6, 2005 I was told that I could - if I wanted to, pretty safely run some 550cc Injectors, with a Fuel Pressure Regulator, and a T61 ALL on the Stock JDM ECU with no piggy backs or any fuel management. Is this True? Can it be done? I was told the JDM ECU will run the 550's but I'll run rich up top. Has anyone tried this? My JDM Twins are leaking oil and I'm either going to replace them or go Single. Thanks. Hi there, I'm afraid that's not possible. For starters do you know that the US spec 550's are Low Impedence and require the US/UK resistor pack? And for seconds I've seen a JDM try to run 550's and it wouldn't leave the garage....or start after a while. You will have to trim back the fueling at low speed and the 550's will only just be man enough to get you to 1.2bar on the T61. If you weren't fitting the T61 I'd suggest lowering the static fuel pressure to run the 550's on the stock ECU...but as you do have the T61 it's definately fuel computer time. Link to comment Share on other sites More sharing options...
Pig Posted December 6, 2005 Share Posted December 6, 2005 Whats involved with doing this on a UK spec? Link to comment Share on other sites More sharing options...
Alex Posted December 6, 2005 Share Posted December 6, 2005 Whats involved with doing this on a UK spec? Well of that lot all you need is the turbo... Oh and lower EGTs!!!! Link to comment Share on other sites More sharing options...
terribleturner Posted December 6, 2005 Share Posted December 6, 2005 **Slight Hijack** Whats the max the Blue Emanage will control on a J-spec?? Is it something like 528 or something?? Link to comment Share on other sites More sharing options...
Alex Posted December 6, 2005 Share Posted December 6, 2005 **Slight Hijack** Whats the max the Blue Emanage will control on a J-spec?? Is it something like 528 or something?? 528 what's? eh? Injector wise I don't think I'd use any piggyback for more than 850cc. Link to comment Share on other sites More sharing options...
Pig Posted December 6, 2005 Share Posted December 6, 2005 Well of that lot all you need is the turbo... Oh and lower EGTs!!!! Great stuff! You know im gunna start saving. Isnt it great that its so easy!!! EGT should be sorted asap! Link to comment Share on other sites More sharing options...
terribleturner Posted December 6, 2005 Share Posted December 6, 2005 528 what's? eh? Injector wise I don't think I'd use any piggyback for more than 850cc. Sorry, still tired I was aiming for injector size, even though you can't get 528cc's. So in short, what's thee max size injectors the Emange will control?? Link to comment Share on other sites More sharing options...
Alex Posted December 6, 2005 Share Posted December 6, 2005 Sorry, still tired I was aiming for injector size, even though you can't get 528cc's. So in short, what's thee max size injectors the Emange will control?? It will TRY to controll anything - but you can only back it off by 50% so I'd say 50% bigger than stock is your limit. Which is 880cc....but considering I back off 650's by about 40% it's not going to work - unless you're producing so much power that the 880's are getting pushed hard....and I'd hate to think how bad the idle would be. Personally I think 800/850 is the upper limit. But if you're producing the power to need them then you really should be investing in a proper ECU. Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 6, 2005 Share Posted December 6, 2005 Sorry, still tired I was aiming for injector size, even though you can't get 528cc's. So in short, what's thee max size injectors the Emange will control?? control well I would go max 800cc, you will need timing mods throughout your map to compensate Link to comment Share on other sites More sharing options...
terribleturner Posted December 6, 2005 Share Posted December 6, 2005 Where the hell did i get 528cc from then?? And i hadn't been drinking at the time either. Cheers Alex. Link to comment Share on other sites More sharing options...
Ian C Posted December 6, 2005 Share Posted December 6, 2005 I back off 720's by 40% tops as well. You can play with the static fuel pressure to compensate for bigger injectors but, hmm, that lowers their flow capacity anyway so why not run smaller ones in the first place Although the 850cc is a drop-in so that's why I guess haha thiking while I type, as ever. 850's on a T61 with stock static fuel pressure needed 50% drops and it still wasn't enough... -Ian Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 6, 2005 Share Posted December 6, 2005 how did the CLC cope with the larger injectors FWIW? The VVTi CLC had a good go at 650's on idle with no adjustment Link to comment Share on other sites More sharing options...
Alex Posted December 6, 2005 Share Posted December 6, 2005 how did the CLC cope with the larger injectors FWIW? The VVTi CLC had a good go at 650's on idle with no adjustment I run 0 correction on a warm idle....what does that tell you I wonder if it's an ODB2 thang? As we've had rumours of bigger injectors being used on stock ECU's. EDIT- doh - lowered my fuel pressure to 34psi....I'll shut up. It's about -10 with normal pressure. Link to comment Share on other sites More sharing options...
Ian C Posted December 6, 2005 Share Posted December 6, 2005 how did the CLC cope with the larger injectors FWIW? The VVTi CLC had a good go at 650's on idle with no adjustment I have to pull airflow with 720's on non-VVTi, but the closed loop still works within that. It can still balance for stoich under idle and cruise, although it's a little more heavy-handed in it's adjustments (naturally as it adjusts duty so with bigger injectors it's a bigger step). The cams exacerbate the situation at idle but it's only kinda lumpy rather than trying to stall or anything daft. -Ian Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 6, 2005 Share Posted December 6, 2005 I really need to get my head around the EMU at some point. Be good to see any info you have at some point Link to comment Share on other sites More sharing options...
Alex Posted December 6, 2005 Share Posted December 6, 2005 I really need to get my head around the EMU at some point. Be good to see any info you have at some point So would I - like can it sort my warm start....I think it could with the temp based maps it has, but I can't waste £500 in a risky adventure to find out.... Link to comment Share on other sites More sharing options...
Ian C Posted December 6, 2005 Share Posted December 6, 2005 I really need to get my head around the EMU at some point. Be good to see any info you have at some point I need to as well. I need that injector harness to run it though but guess who's still hasn't turned up 3 days after everyone else's -Ian Link to comment Share on other sites More sharing options...
JohnK Posted December 6, 2005 Share Posted December 6, 2005 You will have to trim back the fueling at low speed and the 550's will only just be man enough to get you to 1.2bar on the T61. T61 will run at 1.4 bar on 550's at ~95% duty (not ideal i know!) at stock rail pressure. Link to comment Share on other sites More sharing options...
Alex Posted December 6, 2005 Share Posted December 6, 2005 T61 will run at 1.4 bar on 550's at ~95% duty (not ideal i know!) at stock rail pressure. Yeah that's why I said 1.2bar Link to comment Share on other sites More sharing options...
SupraHuman Posted December 6, 2005 Share Posted December 6, 2005 sorry,another will i be able to control US/UK injectors with my map-ecu on my j-spec, or is a resistor pack needed regardless?? Link to comment Share on other sites More sharing options...
adi2009 Posted December 6, 2005 Share Posted December 6, 2005 Resistor pack is needed. UK/US spec injectors are low impedance and J-spec injectors are high impedance. Link to comment Share on other sites More sharing options...
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