a98pmalcolm Posted October 11, 2009 Share Posted October 11, 2009 Hay all What PSI or Bar does the MKIV TT Jap Spec stock fuel regulator run at, as a matter of interest? Thanks PAul Quote Link to comment Share on other sites More sharing options...
steady_dave Posted October 11, 2009 Share Posted October 11, 2009 0.7? Although I could have just made that up! Quote Link to comment Share on other sites More sharing options...
AndyT Posted October 11, 2009 Share Posted October 11, 2009 About 10 psi. Quote Link to comment Share on other sites More sharing options...
a98pmalcolm Posted October 11, 2009 Author Share Posted October 11, 2009 ok thanks guys Quote Link to comment Share on other sites More sharing options...
Jake Posted October 11, 2009 Share Posted October 11, 2009 0.7? Although I could have just made that up!Huh? About 10 psi. WTF? Paul/Malc, It's 38psi static mate. Quote Link to comment Share on other sites More sharing options...
Steve Posted October 11, 2009 Share Posted October 11, 2009 Stock fuel pressure is around 36-38psi static. Quote Link to comment Share on other sites More sharing options...
AndyT Posted October 11, 2009 Share Posted October 11, 2009 Huh? WTF? Paul/Malc, It's 38psi static mate. Stock fuel pressure is around 36-38psi static. Yep. Our mistake. Auto thought boost pressure. Quote Link to comment Share on other sites More sharing options...
a98pmalcolm Posted October 11, 2009 Author Share Posted October 11, 2009 (edited) ahhhh ok cheers for re answering was thinking 10 psi is kinda low lol if using an adjustable fuel regulator with a BPU+ what would the recomended sitting be? Edited October 11, 2009 by a98pmalcolm (see edit history) Quote Link to comment Share on other sites More sharing options...
robin Posted October 11, 2009 Share Posted October 11, 2009 My reccomendation would be leave the original regulator in. Quote Link to comment Share on other sites More sharing options...
Steve Posted October 11, 2009 Share Posted October 11, 2009 ahhhh ok cheers for re answering was thinking 10 psi is kinda low lol if using an adjustable fuel regulator with a BPU+ what would the recomended sitting be? Same as stock. Quote Link to comment Share on other sites More sharing options...
AndyT Posted October 11, 2009 Share Posted October 11, 2009 Can't find a lopt of info on this. Best bet is to email Mr Whiffin, AFR for advice. All I can find is the upgrading of the pump itself. Twin or single Walbro pumps or go for the Bosch 044 unit. Nothing on the regulator, apart from replacing it, though. Quote Link to comment Share on other sites More sharing options...
Steve Posted October 11, 2009 Share Posted October 11, 2009 There is no point in changing the pressure just like there is no point in changing the stock regulator. Quote Link to comment Share on other sites More sharing options...
Homer Posted October 11, 2009 Share Posted October 11, 2009 It's 33-38 psi according the Toyota service manual. Outside of these limits it says to replace the FPR. It's really not worth swapping the FPR as even at the lower end of the stock fuel pressure limit the injectors will fuel fine even with boost at 1.3 bar. Quote Link to comment Share on other sites More sharing options...
a98pmalcolm Posted October 11, 2009 Author Share Posted October 11, 2009 yer i done the fuel pump. Infact Paul Whiffin did it. I did alot of research about fuel pressure etc and there is next to nothing on it. I gave changing the regulater a go as i had an adjustable one lying around. I have had alot of work recently done by JPS and have been impressed. I asked leon (main guy there) what would be the next thing upgrade? and he said fitting an ajustable fuel regulater would be the next thing and then thats pretty much it with the stock twins. so i thought it give it a go. Its all on now, but if i dont think its any good (being worse) i can always put the stock one back on. Paul Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted October 11, 2009 Share Posted October 11, 2009 afik its 2.2 at idle Quote Link to comment Share on other sites More sharing options...
a98pmalcolm Posted October 11, 2009 Author Share Posted October 11, 2009 2.2 is 31 PSI.... which is less than standard if standard is between 33 - 38 psi?? Quote Link to comment Share on other sites More sharing options...
Lee P Posted October 11, 2009 Share Posted October 11, 2009 yer i done the fuel pump. Infact Paul Whiffin did it. I did alot of research about fuel pressure etc and there is next to nothing on it. I gave changing the regulater a go as i had an adjustable one lying around. I have had alot of work recently done by JPS and have been impressed. I asked leon (main guy there) what would be the next thing upgrade? and he said fitting an ajustable fuel regulater would be the next thing and then thats pretty much it with the stock twins. so i thought it give it a go. Its all on now, but if i dont think its any good (being worse) i can always put the stock one back on. Paul No need to change the stock regulator at all until you run an uprated rail and you dont need that till well over 600hp Quote Link to comment Share on other sites More sharing options...
Lee P Posted October 11, 2009 Share Posted October 11, 2009 2.2 is 31 PSI.... which is less than standard if standard is between 33 - 38 psi?? It should be 2.5 bar Quote Link to comment Share on other sites More sharing options...
Homer Posted October 11, 2009 Share Posted October 11, 2009 2.2 is 31 PSI.... which is less than standard if standard is between 33 - 38 psi?? If it has a stock FPR and it's showing 2.2 bar then it needs replacing (or has a big leak - which is unlikely). Could also be a pump issue, either way it needs looking at. New FPR's are not overly expensive from Toyota. Quote Link to comment Share on other sites More sharing options...
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