JAG Posted February 11, 2003 Share Posted February 11, 2003 Just out of interest; what fuel pressure does a fuel injected K series engine use? Justin Link to comment Share on other sites More sharing options...
V7 SLR Posted February 11, 2003 Share Posted February 11, 2003 Think I've seen 3 bar somewhere... Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
Cat_man Posted February 11, 2003 Share Posted February 11, 2003 3.0 Bar *eek* The pessure for a electronic fuel pump is 2.5-3.0 PSI (road) For Competition this pressure is ~ 7 - 8 Psi...... never 3.0 BAR Remember : 1 Bar = 14.5 PSI Link to comment Share on other sites More sharing options...
Jason Plato Posted February 12, 2003 Share Posted February 12, 2003 The standard K series fuel rail has a 3 Bar regulator . This with std "white" injectors has sufficient feed for 210 bhp . Dave Link to comment Share on other sites More sharing options...
Peter Carmichael Posted February 12, 2003 Share Posted February 12, 2003 I hope Cat_man doesn't think he is just being ignored, but all other contributors are correct in this instance. For K-series injection engines, 3 Bar is correct. All fuel injection pressures are much higher than the feed pressure to a carb float chamber. On my big engine, the fuel pressure was set to 57psi in order to meet flow requirements. Link to comment Share on other sites More sharing options...
stevefoster Posted February 12, 2003 Share Posted February 12, 2003 My regulator is set at 54psi at the moment. The pump is quite happy achieving this pressure in the rail. Not looked to see what happened to the pressure when one of the injectors was on full open while we did the bench flow test. 54psi = 3.7 bar. Not sure if I have the standard Rover pump as it is the pump/tank off Arnie's car. My racing pics, 7 DIY, race prep. Updated often here Photo's of the year here Hants (North) and Berkshire Area club site here Link to comment Share on other sites More sharing options...
Peter Carmichael Posted February 12, 2003 Share Posted February 12, 2003 It is the combination of pressure and flow that is important. Arnie had a problem where his fuel pressure regulator wasn't big enough to vent excess fuel at idle because he had uprated his fuel pump. The more usual scenario is that the pump doesn't have enough oomph to sustain pressure when the injectors are delivering fuel at maximum power. This is a very bad scenario as it leads to lean mixtures just when you don't want them. Link to comment Share on other sites More sharing options...
stevefoster Posted February 12, 2003 Share Posted February 12, 2003 I've got a big pressure reg. Not sure if I have his uprated pump or the normal one. Was that on the bag tank installation or ali tank? My racing pics, 7 DIY, race prep. Updated often here Photo's of the year here Hants (North) and Berkshire Area club site here Edited by - stevefoster on 12 Feb 2003 10:56:14 Link to comment Share on other sites More sharing options...
Peter Carmichael Posted February 12, 2003 Share Posted February 12, 2003 I was referring to when Arnie upgraded his bag tank and put a super-dooper fuel pump in. I think the tank you have will probably have the JPE-spec pump (originally from the 220 Tomcat Rover?). I am currently using this with a standard K-series fuel rail, so I very much doubt it would cause problems if you have a sensibly specced FPR. Link to comment Share on other sites More sharing options...
V7 SLR Posted February 12, 2003 Share Posted February 12, 2003 I've asked around and have been led to believe that mine has the JPE spec fuel pump too. I'm also running with the standard rail and FPR. So far, no other component has complained when I up-sized the injectors. I'd still like to know what fuel pressure I'm seeing through the different load/speed sites but I'm encouraged that my injector duration decreased when I up-sized the injectors. I'm waiting for Spa to bring out a fuel level/fuel pressure gauge. I might be old before this happens though. Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
JAG Posted February 12, 2003 Author Share Posted February 12, 2003 Thanks for all the info guys. If you wanted to monitor fuel pressure I think you could use a capilliary type oil pressure guage tapped into the fuel line between the pump and fuel rail. It should have the correct range and be suitable for continuos use with petrol. Justin Link to comment Share on other sites More sharing options...
V7 SLR Posted February 12, 2003 Share Posted February 12, 2003 JAG, that's certainly one way, thanks but I don't really want to drill another 52mm hole in my dash to accommodate such if one day [sigh] Spa 🙆🏻 would produce what I want which would fit in the fuel level gauge hole already in use. Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
stevefoster Posted February 12, 2003 Share Posted February 12, 2003 Peter, That figures as the thing has a Rover sitcker on it. I bought the little SBD sold oil filled pressure gauge. You get need a little ali inline adaptor that the gauge screws into. Set it up and then remove it and plug the hole with the supplied bung. 2 min job to test the pressure in the future that way. Bill S of mailing list fame said you could set the or test the pressure reg using an airline and seeing what pressure air started pushing past. Not tried this so cannot confirm. My racing pics, 7 DIY, race prep. Updated often here Photo's of the year here Hants (North) and Berkshire Area club site here Link to comment Share on other sites More sharing options...
Peter Carmichael Posted February 12, 2003 Share Posted February 12, 2003 I set mine by running a bypass feed to the fuel pump with an oil pressure sender linked into the line and feeding the stack dash. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now