Jellybean Posted September 29, 2016 Author Share Posted September 29, 2016 3Bar static is a good starting point, an injectors spray pattern is affected by pressure so when using aftermarket units it would be good to check with the manufacturer what pressure they recommend, also the flow rating of the injector would be quoted for a certain pressure too as you can see on the injector sheet I posted below http://www.mkivsupra.net/vbb/attachment.php?attachmentid=211964&d=1463509494 Wez , How would I read the above sheet running BPU , what pressure should I set it at? Quote Link to comment Share on other sites More sharing options...
Jellybean Posted September 29, 2016 Author Share Posted September 29, 2016 Not wanting to sell these, they are too useful to me, sorry. But go here for Bosch Motorsport parts: http://www.motorsport-systems.co.uk/ Thanks Chris , Rich got back and I asked Bosch , The unit does not have a Pulsation damper built in Fuel Pressure Regulator Mini A Pressure Range 2.2 to 3.5 bar B 280 550 340-03 -- 148.44 +VAT FPR Adaptor Commercial Type No.: F 02U V00 735-02 153.78 + VAT Quote Link to comment Share on other sites More sharing options...
Wez Posted September 29, 2016 Share Posted September 29, 2016 Wez , How would I read the above sheet running BPU , what pressure should I set it at? Not sure I follow, your fuel pressure has no baring on running BPU, stock or single. A cheap fix for getting more out of your injectors is to increase the static pressure using an upgraded or adjustable FPR, for example my 996 currently runs a 5bar FPR, I plan to reduce this and install bigger injectors The sheet is saying that the 900cc injectors are rated / tested at 900cc with 3bar pressure, which happens to be a common static pressure hence calling them 900cc, at 3.8bar they flow over 1000cc. Quote Link to comment Share on other sites More sharing options...
Jellybean Posted September 29, 2016 Author Share Posted September 29, 2016 (edited) Not sure I follow, your fuel pressure has no baring on running BPU, stock or single. A cheap fix for getting more out of your injectors is to increase the static pressure using an upgraded or adjustable FPR, for example my 996 currently runs a 5bar FPR, I plan to reduce this and install bigger injectors The sheet is saying that the 900cc injectors are rated / tested at 900cc with 3bar pressure, which happens to be a common static pressure hence calling them 900cc, at 3.8bar they flow over 1000cc. Sorry , I must be misinterpreting what I am reading I taught Fuel pressure has a bearing on AFR's Rate of flow is tied in with power levels / BHP / engine efficiency Spray pattern You set it accordingly , I am not too sure what pressure it is running (need to check with a gauge ); when I asked my mapper they indicated removing the pulsation damper will not affect it I will throw up some logs But AFR's look good but to me a little rich on idle I am a little confused why the mapper said to run them at oem pressure as opposed to Siemens 3 bar ? I taught it was do to my power levels , oem pressure is sufficient for bpu Just curious if it has a bearing on the ticking noise I hear or is it just down to lack of a damper Edited September 29, 2016 by Jellybean (see edit history) Quote Link to comment Share on other sites More sharing options...
Jellybean Posted September 29, 2016 Author Share Posted September 29, 2016 Motec log file https://1drv.ms/u/s!Ao-FTTt3GMhrg4RF72PNqQPeKitomQ Analysis software http://www.motec.com/i2/i2downloads/ You will need to use m1 channels , by default it's mxxx series M1 channel names New Name (possible old name) Engine Speed (Engine RPM) Ambient Pressure (Baro Pres) Inlet Manifold Pressure (Manifold Pressure) Inlet Air Temperature (Air Temp Inlet) Coolant Temperature (Engine Temp) Ignition Timing (Ign Advance) Exhaust Lambda (Lambda 1 or LA 1) BTW, you can drag channels onto some of those graphic panels as well (so to change EngineRPM to show EngineSpeed). Click on the graph to locate the data cursor (the value list on the right will show all the channels at that point in time). You can use the up and down arrow keys on your keyboard (or the scroll wheel on your mouse) to zoom in and out on the data. A short cut to zoom out to everything is "F2". I Quote Link to comment Share on other sites More sharing options...
Wez Posted September 29, 2016 Share Posted September 29, 2016 I am a little confused why the mapper said to run them at oem pressure as opposed to Siemens 3 bar ? I taught it was do to my power levels , oem pressure is sufficient for bpu Have you confirmed what the OEM pressure is, its prob around 3Bar What are you calling a little rich at idle? When cold it will run rich, as things warm up it can be leaned off and should idle nicely at around 14.7 to 15.0, this is for straight petrol, when you start adding meth etc the AFRs could be affected. FWIW I still run stock reg, so stock pressures on my single with 650cc drop-ins with fuel pulsation dampener stock lines and a single Bosch 044 pump in tank Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted September 29, 2016 Share Posted September 29, 2016 Just listen to your mapper, sounds like he's on the right lines. You really shouldn't need to tamper with fuel pressure settings on a BPU. If it's a bit rich on idle then get him to adjust your cold start and fuel map. Just remember that as weather gets colder/warmer it will always throw the tune off a bit Quote Link to comment Share on other sites More sharing options...
Jellybean Posted September 29, 2016 Author Share Posted September 29, 2016 Have you confirmed what the OEM pressure is, its prob around 3Bar What are you calling a little rich at idle? When cold it will run rich, as things warm up it can be leaned off and should idle nicely at around 14.7 to 15.0, this is for straight petrol, when you start adding meth etc the AFRs could be affected. FWIW I still run stock reg, so stock pressures on my single with 650cc drop-ins with fuel pulsation dampener stock lines and a single Bosch 044 pump in tank Spot on Wez , I think some of those rich readings are from cold , I am just doing some analysis on the data the last few days , just getting up to speed what I am looking at I ordered up the Bosch unit , should be a reliable I might put the OEM pulsation damper back in I have the OEM readings in the thread, top end is 2.8 bar Toyota GTE Service Specs... Fuel Pressure at Idle w/vacuum hose disconnected is 33-40psi (2.3 - 2.8 kgf/cm) Fuel Pressure at Idle w/vacuum hose connected is 24-31psi (1.7 - 2.2 kgf/cm) Quote Link to comment Share on other sites More sharing options...
Jellybean Posted October 3, 2016 Author Share Posted October 3, 2016 Off Topic , Chris do you know Ian Anderson ? , chief mechanic ’79 Williams F1 working in the prototype department developing semi-automatic gearbox http://www.racecar-engineering.com/technology-explained/formula-1-sequential-gearboxes/# Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 4, 2016 Share Posted October 4, 2016 Off Topic , Chris do you know Ian Anderson ? , chief mechanic ’79 Williams F1 working in the prototype department developing semi-automatic gearbox http://www.racecar-engineering.com/technology-explained/formula-1-sequential-gearboxes/# No, sorry, heard his name many times, never knowingly met him. I think he worked on the Metro 6R4 rally car project, didn't he? Quote Link to comment Share on other sites More sharing options...
Jellybean Posted October 4, 2016 Author Share Posted October 4, 2016 He lives 40 mins away from me , I think he worked on a few interesting engineering projects Taught you may of met him , was also told he has aryton Sienna's old f1 Honda chassis bolted to the garage wall , he makes a few things for my friends supra Quote Link to comment Share on other sites More sharing options...
Jellybean Posted October 13, 2016 Author Share Posted October 13, 2016 The Bosch Motorsports Fuel regulator arrived , very well built as you would expect from Bosch and Mini is one word to describe it Quote Link to comment Share on other sites More sharing options...
Jellybean Posted October 13, 2016 Author Share Posted October 13, 2016 For fitment , I remove the two E-Clips from the Adapter , insert the Regulator, refit e-clips ? To set pressure I turn the top shaft on the regulator , once set , lock down the 8 mm nut down Quote Link to comment Share on other sites More sharing options...
Jellybean Posted October 13, 2016 Author Share Posted October 13, 2016 Would you get away with M14X1.5 to dash 6, I dont think it will seal? Quote Link to comment Share on other sites More sharing options...
Jellybean Posted October 15, 2016 Author Share Posted October 15, 2016 Just for anybody else who wants to install one To fit the Reg, ***Buy /Borrow a Circlip pliers with the ability to fit them Internal Remove the two E-Clips from the Adapter , Oil regulator seals, Insert the Regulator until it clicks into place, You only need to refit the retaining e-clip but you can fit the second clip , incase you ever needed it again Still between two minds to remove the M14 IN male fittings ,they are on there tight, not too keen on using a vice to hold it !! the OUT fitting is cast in there , cylinder runs though it , I think you will damage it trying to remove the OUT fitting Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.