Ian C Posted April 3, 2005 Share Posted April 3, 2005 Name: Fuel Cut Defender Also known as: FCD Boost cut controller What is it? It's a bit of electronics that changes the airflow signal to the ECU so that it never sees more than 1 bar of boost. This is to avoid Fuel Cut. Pros: No more fuel cut when hitting over 1.0bar of boost as the pressure signal to the ECU is clamped just under 1 bar of boost. Cons: Crap FCDs scale the airflow input so that when the stock sensor hits 1.25bar (it's maximum) the ECU gets a shade under 1.0bar. This also has the effect of scaling the ENTIRE airflow signal so the ECU always receives a lower airflow value than the engine is really getting. Messes up the whole fuelling map towards the lean end of the spectrum and is therefore highly not recommended. Quote Link to comment Share on other sites More sharing options...
Guest mark poulton Posted March 12, 2006 Share Posted March 12, 2006 hello, does an n/a have a fuel cut device as standard? Quote Link to comment Share on other sites More sharing options...
Robert Posted March 12, 2006 Share Posted March 12, 2006 N/A's dont need a fuel cut device as they dont make any boost....hence the fact its a N/A ( non-turbo) Quote Link to comment Share on other sites More sharing options...
Guest mark poulton Posted March 12, 2006 Share Posted March 12, 2006 thanks, thats what i thought!! Quote Link to comment Share on other sites More sharing options...
lambertpig Posted March 12, 2006 Share Posted March 12, 2006 are there any cons for the thor unit ill be fitting next week? Quote Link to comment Share on other sites More sharing options...
JohnK Posted March 12, 2006 Share Posted March 12, 2006 The thor unit is considered to be the best on the market. Quote Link to comment Share on other sites More sharing options...
spidermonkey Posted April 30, 2006 Share Posted April 30, 2006 oh s**t i have one of these fitted Quote Link to comment Share on other sites More sharing options...
Lucifer Posted May 1, 2006 Share Posted May 1, 2006 oh s**t i have one of these fitted We can always replace it with the grddy unit next week if you like. PArt ex availalbe! Quote Link to comment Share on other sites More sharing options...
Sandy-m2 Posted June 1, 2006 Share Posted June 1, 2006 what is a good way to tell if you have one? PS. i cant drive the car at the moment so can only look at stuff Quote Link to comment Share on other sites More sharing options...
JohnK Posted June 1, 2006 Share Posted June 1, 2006 check the wireing by the ECU, (pin 68 rings a bell but i could be way off, do a search) see if you have any little boxes attached. Quote Link to comment Share on other sites More sharing options...
tango Posted July 20, 2006 Share Posted July 20, 2006 Hi there, when my car hit about 14-15 psi, I did some times get the sudden loss power an then back on afterward, but no warning light come on, is that fuel cut? If so, how much is one of the fuel cut defencer? cheers Quote Link to comment Share on other sites More sharing options...
Jake Posted July 20, 2006 Share Posted July 20, 2006 Hi there, when my car hit about 14-15 psi, I did some times get the sudden loss power an then back on afterward, but no warning light come on, is that fuel cut? If so, how much is one of the fuel cut defencer? cheersYes. My warning light never used to come on either, contary to what most people seem to get. Try Thor Racing's website for FCDs Quote Link to comment Share on other sites More sharing options...
tango Posted July 21, 2006 Share Posted July 21, 2006 Hi Guys, I thought the fuel cut dont come in till 17psi, Im only set it at 15psi, looks like I have to reduce it, may be? or if I have a FCD, what psi can I go up to, mine is stock TT with manual boost controler. cheers Quote Link to comment Share on other sites More sharing options...
xxcat Posted October 8, 2007 Share Posted October 8, 2007 ... This also has the effect of scaling the ENTIRE airflow signal so the ECU always receives a lower airflow value than the engine is really getting. Messes up the whole fuelling map towards the lean end of the spectrum and is therefore highly not recommended. Are you sure that the voltage is "scaled" in the entire range and not "clamped" after some value.. Quote Link to comment Share on other sites More sharing options...
Alex Posted October 8, 2007 Share Posted October 8, 2007 Are you sure that the voltage is "scaled" in the entire range and not "clamped" after some value.. As noted it's version specific. Crap one's scale. Quote Link to comment Share on other sites More sharing options...
DaveSupTT Posted October 24, 2007 Share Posted October 24, 2007 I have read a few other threads but im still unsure on this. I was driving along the motorway giving it some, I was in O/D mode and getting some speed up and my turbo boost gauge was reading around 1.4, im unsure but I think the pre owner said that they were set to 1.2 and running on Hybrid turbos, but now and again the boost does creep above that. My car has been delimited and I believe is fitted with a fuel cut defender. Although, I am not sure what kind and to be honest I know very little on this subject. Apparently its has a restrictor ring set at 1.2 bar which is not the best way to restrict the boost, and that an electronic boost controller would be more reliable - but like i said, i dont know! Anyway, I was driving along then all of as sudden all power was gone as if I had hit the breaks, quite an abrupt feeling, then after a few seconds the power was back. Am I right in thinking that this is known as fuel cut and its to prevent your car from over boosting? Is there anyway of preventing fuel cut at all, yet still preventing your turbos from over boosting, as I wouldn't want to damage the car, but would prefer it if the speed wasn't limited in anyway by fuel cut. Cheers guys! Quote Link to comment Share on other sites More sharing options...
Alex Posted October 24, 2007 Share Posted October 24, 2007 Sort the over boosting, not the fuel cut. Fitting a "restrictor ring" will help. Quote Link to comment Share on other sites More sharing options...
DaveSupTT Posted October 24, 2007 Share Posted October 24, 2007 Sort the over boosting, not the fuel cut. Fitting a "restrictor ring" will help. Apparently it has a restrictor ring and its set to 1.2 bar? Quote Link to comment Share on other sites More sharing options...
amigo5 Posted October 24, 2007 Share Posted October 24, 2007 BCC and FCD i think their work is one but different brand shall it's make a differ if i install BCC since nothing talk about it here any one may attach any manuals for the both?? note: mine is a J spec 2jz Quote Link to comment Share on other sites More sharing options...
DaveSupTT Posted October 24, 2007 Share Posted October 24, 2007 whats BCC? Boost Control C.....??? Quote Link to comment Share on other sites More sharing options...
amigo5 Posted October 26, 2007 Share Posted October 26, 2007 yeab BCC is the greddy Boost Cut Control my plan know is to go over 15 psi and using one of these units any answer for my last question? Quote Link to comment Share on other sites More sharing options...
Guest Nizam Posted June 14, 2008 Share Posted June 14, 2008 hi i need fuel cut denfender. im looking for to buy one. please if anyone got sechand or new let me know. im intresting! add me [email protected] Quote Link to comment Share on other sites More sharing options...
Guest Nizam Posted June 15, 2008 Share Posted June 15, 2008 hi im still looking for greddy fuel cut denfender. please let me know i heard Hks is not good made for FCD. Quote Link to comment Share on other sites More sharing options...
absz Posted June 15, 2008 Share Posted June 15, 2008 hi im still looking for greddy fuel cut denfender. please let me know i heard Hks is not good made for FCD. Trying posting on the WANTED section. Quote Link to comment Share on other sites More sharing options...
grumps2JZ Posted July 16, 2012 Share Posted July 16, 2012 hey guys i have purchased a second hand greddy boost cut befender for a 3SGTE (SW20).... but according to the person i bought it off it was removed from a working supra. anybody had any experiences using this? (jdm) Quote Link to comment Share on other sites More sharing options...
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