Chris Wilson Posted November 25, 2015 Share Posted November 25, 2015 Top quality precision fuel cut defenders (FCD's) Fuel Cut Defenders Since Greddy and TRL stopped doing their very nice and reliable fuel cut defenders I have been wondering about building a sensibly priced alternative. The great thing with the Greddy is it did not clamp the MAP sensor voltage until the pre-set threshold was reached. The HKS one was not so nice and skewed the output from the MAP sensor, thereby also skewing the fuel curve. I have now tooled up to produce my own FCD that leaves the MAP sensor output *totally* unaltered until the voltage clamp threshold is reached, just like the Greddy ones did, when they were still available, but using more modern, closer tolerance components and a slight circuit improvement. It also uses the same colour wires as the Greddy, meaning the excellent on line pictorial fitment instructions at http://mkiv.com/techarticles/bcc/bcc_install/bcc.htm can be used to aid fitting, which is very easy. They come with an earth eyelet ready soldered on, meaning only three other wires to connect. Use the central stud or the main ecu to floor pan for th earth terminal, under the 10mm socket size nut. They come pre set on lab standard equipment,to suit either VVTi or earlier TT models. If you have a VVTi or 1JZ-GTE let me know when ordering. I have 6 ready to ship, the last batch sold out very quickly. They can be programmed for other MAP sensor turbo engines like Mitsubishis, RX7's, Skylines, MR2 turbos, blah blah. If you can mention them on other forums where you may be a member I will be very grateful! Price is £55 plus VAT (£66) with £5.80 plus VAT (£6.96) insured P&P to any UK post code. That's £72.96 grand total. Please ask for a delivery price to other places. Thanks. - - - Updated - - - I can supply wiring schematic for the VVTi if required. Just different ecu pins used, as easy to fit to a VVTi as a none VVTi engine, 4 wires to connect, one being an eyelet terminated ground wire like the none VVTi ones. Link to comment Share on other sites More sharing options...
clay Posted November 25, 2015 Share Posted November 25, 2015 Can i have one please, 1993 jap spec tt i have sent you a email. Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 25, 2015 Author Share Posted November 25, 2015 Sure, just e-mail me at [email protected] and we can sort payment. I have a fresh build of them in stock, thanks. Link to comment Share on other sites More sharing options...
clay Posted November 25, 2015 Share Posted November 25, 2015 email sent. Link to comment Share on other sites More sharing options...
MRX Posted November 25, 2015 Share Posted November 25, 2015 Didn't know you did this sort of thing Chris. Can you make reliable VVTI Speed-delimiters? From what i've read, ones on the market have issues... Thanks Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 25, 2015 Author Share Posted November 25, 2015 No, I am afraid not, I looked at these and to do a proper one would be too costly for the amount I'd be able to sell, they are complex beasties and there's not enough information on the VVTi system to work from. Sorry... Link to comment Share on other sites More sharing options...
wile e coyote Posted November 25, 2015 Share Posted November 25, 2015 No, I am afraid not, I looked at these and to do a proper one would be too costly for the amount I'd be able to sell, they are complex beasties and there's not enough information on the VVTi system to work from. Sorry... Dam Ide still be interested as the only option atm is to buy a syvecs with the gear box control modual Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 25, 2015 Author Share Posted November 25, 2015 I need about 100 or more just like you though Link to comment Share on other sites More sharing options...
cainhead Posted November 25, 2015 Share Posted November 25, 2015 Hi Chris, I'll take a FCD please. Will email you now Cheers Link to comment Share on other sites More sharing options...
Scooter Posted November 25, 2015 Share Posted November 25, 2015 Fitted mine today, replaced an hks one and feels better for it, could be a placebo effect but it's peace of mind for me :-) Link to comment Share on other sites More sharing options...
clay Posted November 25, 2015 Share Posted November 25, 2015 paid Link to comment Share on other sites More sharing options...
shaz2010 Posted November 25, 2015 Share Posted November 25, 2015 Chris I've read the details of this but what does the hks compared to yours effect the car? is it just what said in the fuel curve. Can the hks fcd have a bad effect on the car. Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 26, 2015 Author Share Posted November 26, 2015 Chris I've read the details of this but what does the hks compared to yours effect the car? is it just what said in the fuel curve. Can the hks fcd have a bad effect on the car. I'll try and do an in depth write up soon, if i was more savvy with a PC and camera i would do a video, but basically the HKS one starts to alter the voltage from the MAP sensor starting at idle, and this means the stock fuelling and ignition map is not what Toyota planned. The Greddy one did, and mine does not alter the stock map until the voltage from the MAP sensor reaches a predetermined limit, where mine then stops it rising any further. Until that point the fuelling and ignition remain as Toyota wrote in the ecu memory. I consider the way the HKS works to be incorrect and bizarre. It was discussed on an American MKIV forum at some length, years ago. In testing several HKS units, some new, some used but operative, I also found they varied, even on the same setting. Link to comment Share on other sites More sharing options...
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