RussVVTi6Speed Posted January 31, 2008 Share Posted January 31, 2008 How complicated is it? I want to fit a Blow off valve to my VVTi TT its a SARD r2d2, where do I start anyone?? Quote Link to comment Share on other sites More sharing options...
chris2o2 Posted January 31, 2008 Share Posted January 31, 2008 Very interested too , my r2d2 should be arriving soon . Quote Link to comment Share on other sites More sharing options...
Digsy Posted January 31, 2008 Share Posted January 31, 2008 Not a good idea on a VVTi as they run MAF, as opposed to speed/density (MAP/MAT) for air metering. If you let air in through the MAF meter and then blow a proportion of it out, the ECU will get confused over how much fuel it should be delivering. This is explained more fully in the link that magically appears every time the words Blow Off Valve occurs in a post Quote Link to comment Share on other sites More sharing options...
foodfreak Posted February 1, 2008 Share Posted February 1, 2008 I ran an R2D2 for two years on my VVTi without any fueling issues, most problems happen with autos / tiptronics. It's a straightforward install if you have the complete R2d2 kit. Quote Link to comment Share on other sites More sharing options...
chris2o2 Posted February 1, 2008 Share Posted February 1, 2008 I dont suppose you have a picture at least of it installed foodfreak that we/i can refer to if need be . This is my first turbo car and although i'm trying to learn as much as i can some write ups are hard to follow if you dont know what each pipe/hose is for/named . Thanks. Quote Link to comment Share on other sites More sharing options...
foodfreak Posted February 1, 2008 Share Posted February 1, 2008 Don't think I have any old pictures left, but I'll have a search. You should have with the kit a large 2ft or so long pipe which connects to where the stock blow off valve is. decide where to bolt the R2d2 ( I had mine on the inner wing) & fit the small vacuum pipe. Quote Link to comment Share on other sites More sharing options...
Nic Posted February 1, 2008 Share Posted February 1, 2008 How complicated is it? I want to fit a Blow off valve to my VVTi TT its a SARD r2d2, where do I start anyone?? Do you have a Supra specific kit or just the universal BOV? If you have the Supra specific kit then it should be fairly straight forward, as the kit includes everything needed for the install. If it is just a universal BOV, then you will also need an aluminium intercooler hard pipe and a boss welded onto the hardpipe to attach the BOV too. Very good advice from Digsy above, fitting a vent to atmosphere BOV on a VVTi is a bad idea, as it WILL cause fueling issues. If you must fit an aftermarket BOV, then make sure it recirculates the air, rather than releasing the air. Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 1, 2008 Share Posted February 1, 2008 It causes the fuelling issues no matter what gearbox you are using - it's just more apparent on the autobox as it is a bigger load on the almost-stalling engine. If you've got an atmo BOV, a MAF system, and a manual box I can guarantee you I can stall your car -Ian Quote Link to comment Share on other sites More sharing options...
Nic Posted February 1, 2008 Share Posted February 1, 2008 There is one other option if you do want to fit a vent to atmosphere BOV on a VVTi. HKS do what the call the EIDS, this is an electronic gizmo that is suppose to fool the ECU on cars with a MAF sensor, to prevent fueling issues. How it works and how effective it is I have no idea. http://www.hks-power.co.jp/products/blow_off/sqv/img/option5.jpg Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 1, 2008 Share Posted February 1, 2008 The E-Manages have a function to do that but it's unfortunately poorly implemented on the Blue - I haven't tried it on the Ultimate. It detects a throttle close and clamps the airflow signal to a user-set value. If you make the value just above the amount of airflow signal you get at idle, it clips the signal at that when you lift off, stopping the ECU seeing a huge airflow signal when the air gets vented, so it fuels for the idle amount instead. Alas it doesn't clip it at that value, it *fixes* it at that value so the car idles like a bag of shite as it sees one constant airflow signal no matter what the engine is up to. What a clanger I'm guessing that's how this HKS one works except it clips instead of fixes. -Ian Quote Link to comment Share on other sites More sharing options...
Wez Posted February 1, 2008 Share Posted February 1, 2008 Best option would be to save your money and not bother with a BOV Quote Link to comment Share on other sites More sharing options...
Nic Posted February 1, 2008 Share Posted February 1, 2008 Dodgy translation of what the EIDS does here. http://translate.google.com/translate?hl=en&sl=ja&u=http://www.hks-power.co.jp/products/blow_off/sqv/option.html&sa=X&oi=translate&resnum=1&ct=result&prev=/search%3Fq%3Dhttp://www.hks-power.co.jp/products/blow_off/sqv/option.html%26hl%3Den%26safe%3Doff%26client%3Dsafari%26rls%3Den-us Quote Link to comment Share on other sites More sharing options...
RussVVTi6Speed Posted February 2, 2008 Author Share Posted February 2, 2008 Right thanks for all the advice guys. I had nop idea it was not advisable on a VVTi. This fueling issue does it do any damage or does it just mean the car will not run as well as it should for acceleration/ Quote Link to comment Share on other sites More sharing options...
Nic Posted February 2, 2008 Share Posted February 2, 2008 This fueling issue does it do any damage or does it just mean the car will not run as well as it should for acceleration/ There is potential for damage on a VVTi/Uk Supra due to the MAF sensor, when the BOV discharges the air it will initially run rich, the ECU will then compensate for this and cause it to run too lean. I'd either leave the stock BOV on or fit a recirculating BOV. Quote Link to comment Share on other sites More sharing options...
RussVVTi6Speed Posted February 4, 2008 Author Share Posted February 4, 2008 Whats an example of a recirculating BOV, and I dont understand why it has one already but fitting an r2d2 instead will damage it, what is the difference betweeen r2d2 and the stock BOV? Cheers Quote Link to comment Share on other sites More sharing options...
Nic Posted February 4, 2008 Share Posted February 4, 2008 Whats an example of a recirculating BOV, and I dont understand why it has one already but fitting an r2d2 instead will damage it, what is the difference betweeen r2d2 and the stock BOV? Cheers The Sard R2D2 BOV vents the pressurised air to atmosphere, a recirculating BOV, recirculates the air back into the intake system. With a MAF (mass air flow) sensor, the ECU knows the amount of air flowing into the engine and so adjusts fueling to suit. If this air is then vented to atmosphere, the ECU thinks there is more air than is actually going into the engine, so you get a rich mixture. The oxygen sensor in the exhaust will then detect this rich mixture and the ECU will lean out the mixture. There is a recirculation attachment available for the HKS SSQV BOV. Quote Link to comment Share on other sites More sharing options...
nigelc Posted February 6, 2008 Share Posted February 6, 2008 Hi Russ, Just to add my bit (this was my old car)... The R2D2 was taken off by Thor as they were tracing a detonation problem and went back to basics. The problem was a fault FCD in the end. The R2D2 made no difference to power, so it wasn't put back on. When it was on the car, there wasn't any stalling issues or other problems that I could say of. It was purely left off as all it gave the car was a (rather large) noise. Foodfreak once described a stock motor with an R2D2 as sounding like a "mouse farting". On BPU, it is more like an elephant! Anyway Russ, I hope you are still enjoying the car as much as I did, it was a pleasure selling her to another enthusiast. Take care and post up some pics in your garage! nigel Quote Link to comment Share on other sites More sharing options...
RussVVTi6Speed Posted February 6, 2008 Author Share Posted February 6, 2008 Thank Nigel!!! I will let you know how it goes!! Quote Link to comment Share on other sites More sharing options...
RussVVTi6Speed Posted February 10, 2008 Author Share Posted February 10, 2008 All went well with installation sounds really good!!!! Quote Link to comment Share on other sites More sharing options...
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