adz_sportif_turbo Posted September 21, 2009 Share Posted September 21, 2009 I've read that stock fuel pressure is between 2.4 and 2.5 bar...but is that with the vac line on or off??also what boost does the car hit fuel cut...and can i run jus below it and still fuel fine??basically what is the max boost i can run with no mods??sorry for asking so many questions...jus i go back home soon after 3 months away and i can get my hands back on it!! Quote Link to post Share on other sites
StarletRick Posted September 21, 2009 Share Posted September 21, 2009 stock pressure is 33psi with the vac line off. without touching the engine, i wouldnt run anymore than 0.8bar. Quote Link to post Share on other sites
Sparky Posted September 21, 2009 Share Posted September 21, 2009 You wont be able to run more than .85bar without a fuel cut defender and supporting mods like a uprated manifold as there is a restriction in port 3 which would put extra strain on the 3rd piston.So basically dont go upping the boost without teh correct mods!! All the info you need is on this site Quote Link to post Share on other sites
adz_sportif_turbo Posted September 21, 2009 Author Share Posted September 21, 2009 ahh pefect guys !! Quote Link to post Share on other sites
adz_sportif_turbo Posted September 21, 2009 Author Share Posted September 21, 2009 i posted the same question on tgtt earlier...and look at the reply i got!! :Sim not sure about that site anymore!!! Quote Link to post Share on other sites
adz_sportif_turbo Posted September 21, 2009 Author Share Posted September 21, 2009 stock pressure is 33psi with the vac line off. without touching the engine, i wouldnt run anymore than 0.8bar.so when i test the pressure...i should have the engine idling with the vac line off...and should get that pressure reading?? i believe you leave it off as its atmospheric and get a more stable reading yes?? Quote Link to post Share on other sites
StarletRick Posted September 21, 2009 Share Posted September 21, 2009 it isnt that its more stable. its that its reading it at atmospheric pressure. in reality, it makes hardly any difference if you take the pipe on or off. i just do it as a habit. as long as its reading 33 psi, you should be good to go. Quote Link to post Share on other sites
adz_sportif_turbo Posted September 22, 2009 Author Share Posted September 22, 2009 ok mate cheers... Quote Link to post Share on other sites
TBDevelopments Posted October 31, 2009 Share Posted October 31, 2009 the correct way to set fuel pressure on an adjustable regulator is to do it at atmospheric pressure, so turn the ignition on and birdge FP and +B on the diagnostic port. this means you can set the base fuel pressure without having the engine running.TimTB Developments Quote Link to post Share on other sites
scot-ish Posted November 1, 2009 Share Posted November 1, 2009 it isnt that its more stable. its that its reading it at atmospheric pressure. in reality, it makes hardly any difference if you take the pipe on or off. i just do it as a habit. as long as its reading 33 psi, you should be good to go.yeh only 10psi of a difference, so hardly any difference there lol Quote Link to post Share on other sites
TBDevelopments Posted November 1, 2009 Share Posted November 1, 2009 yeah best to do it without the engine running, as being a raising rate it will also reduce fuel pressure when its seeing a vaccum line idle.so if you set it to 33psi with a vacuum and the difference is 10psi like scot-ish says then your true base fuel pressure will be 43psi not 33psi.TimTB Developments Quote Link to post Share on other sites
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