Guest blownbytwins Posted January 30, 2007 Share Posted January 30, 2007 hi,as a fuel controller how good is the apexi safc-2 on a full bpu supra?like if the fuelin needed to be tweeked is it good enough? Quote Link to comment Share on other sites More sharing options...
Clarkey Posted January 30, 2007 Share Posted January 30, 2007 Without bigger injectors or raised fuel pressure & WB02 sensor & AFR gauge ? Forget it. As a fuel controller the E-Manage is much more accurate. Quote Link to comment Share on other sites More sharing options...
imi Posted January 30, 2007 Share Posted January 30, 2007 running on mine - Full BPU and tuned by whifbitz - no problems. It was on the car when I bought it, I personally would have invested in something like an e-manage instead; however if you like the display and all then its well worth it. Quote Link to comment Share on other sites More sharing options...
Clarkey Posted January 30, 2007 Share Posted January 30, 2007 running on mine - Full BPU and tuned by whifbitz - no problems. On stock 440's or/and stock fuel pressure ? And are the neg points on the SAFC-2 all set to 0 % ? Brave man if Yes to the first and No to the second. Quote Link to comment Share on other sites More sharing options...
Scooter Posted January 30, 2007 Share Posted January 30, 2007 cam i just clarify something with these more simple fuel controllers............... Would the fueling on a tt with 440's and the SAFC set at 0 (at all points) = the fueling on a tt with 550's and the SAFC set at -20% (of the available -ve range) Quote Link to comment Share on other sites More sharing options...
Clarkey Posted January 30, 2007 Share Posted January 30, 2007 cam i just clarify something with these more simple fuel controllers............... Would the fueling on a tt with 440's and the SAFC set at 0 (at all points) = the fueling on a tt with 550's and the SAFC set at -20% (of the available -ve range) Perhaps on paper, but maybe the fuel pressure is different .. or perhaps 1 x 550 is flowing less or more fuel than what you think it should do on paper. Only way to tune it is with a WB02 and a AFR gauge. Quote Link to comment Share on other sites More sharing options...
imi Posted January 30, 2007 Share Posted January 30, 2007 On stock 440's or/and stock fuel pressure ? And are the neg points on the SAFC-2 all set to 0 % ? Brave man if Yes to the first and No to the second. Not set to zero at all..... low throttle it is tuned to reduce fuel across the band. on high throttle its set to add just a touch and there is a particular lean spot around 6K where its adding 2-3% tuned by whifbitz using a WB 02 sensor and confirmed the changes on the rolling road (Rebas) to get it even better. Quote Link to comment Share on other sites More sharing options...
Clarkey Posted January 30, 2007 Share Posted January 30, 2007 on high throttle its set to add just a touch and there is a particular lean spot around 6K where its adding 2-3% But if 0 represents what your stock ECU fueling is - and at 1.2 bar 440's go 100% duty anyway & if you're using 440's with stock fuel-pressure ... doesn't that mean you're extending your duty-cycle beyond 100% .. ? Not an "ideal" solution mate ... The SAFC-2 shouldn't be used to "add" fuel ... only to trim it. Quote Link to comment Share on other sites More sharing options...
imi Posted January 30, 2007 Share Posted January 30, 2007 But if 0 represents what your stock ECU fueling is - and at 1.2 bar 440's go 100% duty anyway & if you're using 440's with stock fuel-pressure ... doesn't that mean you're extending your duty-cycle beyond 100% .. ? Not an "ideal" solution mate ... The SAFC-2 shouldn't be used to "add" fuel ... only to trim it. Its been setup like this by both of those tuners. perhaps something isnt standard in my setup then from a fueling perspective (I do know that the injectors are 440s though)... Quote Link to comment Share on other sites More sharing options...
Guest blownbytwins Posted January 30, 2007 Share Posted January 30, 2007 looks like e-manage is the way to go then Quote Link to comment Share on other sites More sharing options...
Clarkey Posted January 30, 2007 Share Posted January 30, 2007 Its been setup like this by both of those tuners. perhaps something isnt standard in my setup then from a fueling perspective (I do know that the injectors are 440s though)... Perhaps you're using raised Fuel pressure - with an Aero FPR or one of them leaky FSE things. If you're running just a stock FPR - then stock Fuel pressure is 36psi (I think). Then I would suggest the next thing you get is an Aero FPR and raise your FP (extending your duty cycle) and get that SAFC-2 tuned by trimming fuel instead of adding it. Or replace your 440's with 550's. Quote Link to comment Share on other sites More sharing options...
Darren Posted January 30, 2007 Share Posted January 30, 2007 I run an SAFC-2 with 550s and hybrid turbos seems ok to me. Quote Link to comment Share on other sites More sharing options...
Clarkey Posted January 30, 2007 Share Posted January 30, 2007 I run an SAFC-2 with 550s and hybrid turbos seems ok to me. It will be as you've got 550's. I ran one in my t61 single - before upgrading to an EM. Not slating the SAFC-2, they do the job - just not as efficently or accurately as the EM. Quote Link to comment Share on other sites More sharing options...
imi Posted January 30, 2007 Share Posted January 30, 2007 BTW: The car isnt hitting 1.2 bar from the last Dyno plots.. AFR PLOT Corresponding Boost plot Seems like it isnt boosting upto 1.2..... sticky wastegate perhaps...?? Quote Link to comment Share on other sites More sharing options...
Clarkey Posted January 30, 2007 Share Posted January 30, 2007 BTW: The car isnt hitting 1.2 bar from the last Dyno plots.. But you don't know what you're duty cycles are ? If you're duty cycle is - say (for example) 90% at WOT in summer. What happens - do you think, in the Winter time .. and at WOT with the denser air hitting your IC ? You're going to be needed more fuel to burn off the denser air. Quote Link to comment Share on other sites More sharing options...
imi Posted January 30, 2007 Share Posted January 30, 2007 not quite sure exactly what needs to be done to get the car to boost upto 1.2bar.... Quote Link to comment Share on other sites More sharing options...
imi Posted January 30, 2007 Share Posted January 30, 2007 Perhaps you're using raised Fuel pressure - with an Aero FPR or one of them leaky FSE things. If you're running just a stock FPR - then stock Fuel pressure is 36psi (I think). Whats a leaky FSE? Quote Link to comment Share on other sites More sharing options...
Clarkey Posted January 30, 2007 Share Posted January 30, 2007 Whats a leaky FSE? One of them Powervalve FSE things - the diaphram in them is weak. Fuel pissing into a hot engine bay has been known to happen. Quote Link to comment Share on other sites More sharing options...
imi Posted January 30, 2007 Share Posted January 30, 2007 K, Cars going into pheonix on thursday, will get them to look into it. ta Quote Link to comment Share on other sites More sharing options...
imi Posted January 30, 2007 Share Posted January 30, 2007 just read this thread http://www.mkivsupra.net/vbb/showthread.php?t=63460&highlight=fse+pressure If I have one, I am getting shot of it. Where exactly are these fitted I found a pic here http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=018&sspagename=STRK%3AMESE%3AIT&viewitem=&item=280052403538&rd=1&rd=1 Quote Link to comment Share on other sites More sharing options...
Clarkey Posted January 30, 2007 Share Posted January 30, 2007 Tony posted up one -when he had one of them things - fitted. But here's what they look like http://www.southwestmotorsport.com/saxo%20boost%20valve.jpg If you're going to raise your FP - use an Aeromotive one. They're excellent. Quote Link to comment Share on other sites More sharing options...
imi Posted January 30, 2007 Share Posted January 30, 2007 SAXO BOOST VALVE doesnt make good reading I just need the car to run a reliable 1.2bar. I have always been puzzled as to why I need to ADD MORE FUEL as the standard map is already overfuelling.....no-one has been able to sort it out. Perhaps this may be it... I'll go with the Aeromotive, Wallen or the Stock Toyota one....if I dont already have it. Quote Link to comment Share on other sites More sharing options...
Darren Posted January 30, 2007 Share Posted January 30, 2007 just read this thread http://www.mkivsupra.net/vbb/showthread.php?t=63460&highlight=fse+pressure If I have one, I am getting shot of it. Where exactly are these fitted I found a pic here http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=018&sspagename=STRK%3AMESE%3AIT&viewitem=&item=280052403538&rd=1&rd=1 Shit I have one of those anyone got a pic of the standard one I may need to go look in the shed. So it needs to come off pronto? Quote Link to comment Share on other sites More sharing options...
Clarkey Posted January 30, 2007 Share Posted January 30, 2007 SAXO BOOST VALVE doesnt make good reading No, it doesn't. Heavens knows why people use them! As they're not a 1:1 FPR - like stock or the Aero. They're a 1:1.7 (IIRC) - so for one 1psi of boost you've got 1.7psi of fuel - hence why mapping with them is real nightmare! And they're prone to leaking fuel into a hot engine bay. They did come recommended here - at some point .. I just need the car to run a reliable 1.2bar. Have you considered - you may have a boost leak ? Quote Link to comment Share on other sites More sharing options...
imi Posted January 30, 2007 Share Posted January 30, 2007 Have you considered - you may have a boost leak ? Been there; done that....changed all the hoses and still the same "leak" I found a pic of the location of the FPR http://www.mkivsupra.net/vbb/attachment.php?attachmentid=13939&d=1112558977 If its not the FPR then I am stumped as to what it is....what about a sticky wastegate? Quote Link to comment Share on other sites More sharing options...
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