Thomas.B Posted July 5, 2011 Share Posted July 5, 2011 So I guess the next step in my quest to normal fuel consumption is to change the FPR (or measure it). Was looking on Ebay and there are really cheap ones (25-40£) with gauges, might be something to try? Has anybody on here bought a cheap one that was good? A cheap one doesnt cost much more then a pressure gauge so thats why I was thinking of changing the whole thing first. Any links to some ok ones that have gauges? A couple of the cheap ones on Ebay, would they work? http://cgi.ebay.co.uk/Toyota-Supra-Soarer-Fuel-Pressure-Regulator-Gauge-/180677821277?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2a113cc35d http://cgi.ebay.co.uk/Fuel-Pressure-Regulator-Toyota-Starlet-Celica-Supra-/250848697665?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3a67bf5d41 http://cgi.ebay.co.uk/NEW-TOYOTA-MR2-CELICA-GT4-SUPRA-FUEL-PRESSURE-REGULATOR-/380081142725?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item587e99fbc5 http://cgi.ebay.co.uk/FUEL-PRESSURE-REGULATOR-BRAIDED-HOSE-SUPRA-STARLET-/130541479254?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item1e64e0e556 cheers Quote Link to comment Share on other sites More sharing options...
Thomas.B Posted July 5, 2011 Author Share Posted July 5, 2011 Also, what should the fuel pressure be for a fully BPU'd car? Quote Link to comment Share on other sites More sharing options...
JamieP Posted July 5, 2011 Share Posted July 5, 2011 I would take it to a decent dyno or tuner that has afr reading equipment and see whats going on with the fueling before trying anything else. Quote Link to comment Share on other sites More sharing options...
Thomas.B Posted July 5, 2011 Author Share Posted July 5, 2011 I dont know of any that are close to me, thats why I thought I could just change it and set it to the correct psi and see if it helps....? They are dirt cheap the universal ones that "should" be good for 140psi so it should work I am hoping... atleast it'll work long enough for me to find out if thats whats wrong. If its not the FPR then the only thing I can think of that's messing with me is the ECU. Quote Link to comment Share on other sites More sharing options...
Hellstrom Posted July 5, 2011 Share Posted July 5, 2011 well the supra base fuel pressure is 42 psi so thats 2.9bar if you have higher readings then that during idle its a faulty FPR. the stock FPR is linear aswell, adding 1bar of boost will raise the fuelpressure to 3.9bar. i would't buy cheap stuff. in general that meens buy the first set and discover that its crap and then buy the other. Quote Link to comment Share on other sites More sharing options...
SimonB Posted July 5, 2011 Share Posted July 5, 2011 (edited) well the supra base fuel pressure is 42 psi so thats 2.9bar if you have higher readings then that during idle its a faulty FPR. the stock FPR is linear aswell, adding 1bar of boost will raise the fuelpressure to 3.9bar. i would't buy cheap stuff. in general that meens buy the first set and discover that its crap and then buy the other. It's not actually. Not on a TT anyway. Stock static fuel pressure (i.e. with the engine off) should be 33-40psi. So basically 36psi. I've seen loads of people saying it's 42 but that's incorrect. It's different for the NA, that should be 38-44psi which is I think where the mistake comes from. There's no way I would buy a cheapo unknown component that could easily destroy your engine if it fails. That's completely bonkers. Edited July 5, 2011 by SimonB (see edit history) Quote Link to comment Share on other sites More sharing options...
Thomas.B Posted July 6, 2011 Author Share Posted July 6, 2011 Do you have any other that I can look into? Am trying to get a used standard one to try. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 6, 2011 Share Posted July 6, 2011 Measure the fuel pressure you have, the stock FPR is very very reliable and good, never seen an issue with one in years. The only aftermarket ones I will even think of using are Bosch Motorsport ones. You will need to adapt the pipework to use one though, and you certainly don't need one. Any decent garage should be able to check the fuel pressure. Quote Link to comment Share on other sites More sharing options...
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