Standard Injector Flow Rates?
Discussion
Hi all,
I'm hoping to fire the car up again this weekend and on my list of things to do before this is the injector re-scaling on my Emerald. I have the flow rates in cc's per minute for the new green injectors but I need the values for the existing ones to put into the software and ammend my fueling map.
If anyone could post them up I would be most grateful
I'm hoping to fire the car up again this weekend and on my list of things to do before this is the injector re-scaling on my Emerald. I have the flow rates in cc's per minute for the new green injectors but I need the values for the existing ones to put into the software and ammend my fueling map.
If anyone could post them up I would be most grateful
Not sure, so if you get any other answers trust them not me!
My originals were D1830GA 0951 with a green band. My DIY flow rig measured approx 240cc/min at 2.5 bar (there's probably a 20% margin of error on the flow rig calibration). I haven't found the spec for these but did find a cross reference to Bosch 0280 150 561 which were apparently 'equivalent'.
The Bosch are rated at 230cc/min or 22 lb/hour at 40 psi.
Hope this helps.
My originals were D1830GA 0951 with a green band. My DIY flow rig measured approx 240cc/min at 2.5 bar (there's probably a 20% margin of error on the flow rig calibration). I haven't found the spec for these but did find a cross reference to Bosch 0280 150 561 which were apparently 'equivalent'.
The Bosch are rated at 230cc/min or 22 lb/hour at 40 psi.
Hope this helps.
Ok so the new injectors come in at 42lbs/hr which I think works out at 441cc/min @ 3.8 bar
And the old ones, which I believe were also black with the green band like yours come out at lets say 230cc/min at 40psi which equates to 230cc/min at about 2.7 bar
So this should be plenty to go on for the software as I think it just requires flow rate in cc/min and pressure in bar. It doesn't need to be exact as the engine will be remapped to the new injectors, but it needs re-scaling just so I don't flood it when I try and fire it up this weekend.
Looking at the figures, the new ones have a fair bit higher flow rate so rescaling is probably a good idea!
And the old ones, which I believe were also black with the green band like yours come out at lets say 230cc/min at 40psi which equates to 230cc/min at about 2.7 bar
So this should be plenty to go on for the software as I think it just requires flow rate in cc/min and pressure in bar. It doesn't need to be exact as the engine will be remapped to the new injectors, but it needs re-scaling just so I don't flood it when I try and fire it up this weekend.
Looking at the figures, the new ones have a fair bit higher flow rate so rescaling is probably a good idea!
If the engine is already a runner, an approach you might consider is to start with roughly half the fuel you think it should need and then increase it by 10% at a time until it starts to fire. You will probably have to increase by about another 50% past that point to get it somewhere right. This saves flooding the engine which introduces yet another unknown you could do without when you're trying to get it going for the first time.
If it's a non-runner and especially if you have a new cam, all bets are off as you can't afford to spend long cranking it over. In that case you'd be better off putting a dizzy and some carbs on it to get it running for the first 30 minutes.
If it's a non-runner and especially if you have a new cam, all bets are off as you can't afford to spend long cranking it over. In that case you'd be better off putting a dizzy and some carbs on it to get it running for the first 30 minutes.
Well it is a runner - sort of. The car was running sweet as a nut, until I took it to V8D and after much deliberation found out that the cam was 17 degrees retarded, but had been running remarkably well due to the Emerald mapping away the problem. So they re-timed it which obviously threw the fuel map out by a country mile, so they took it up the road and re-mapped it so it was at least safe to drive home without running lean anywhere. It was rather lumpy though but did fire up and drive ok.
I've since got it home and fitted a supercharger, new injectors, intercooler and all the other bits and have also to re-set the throttle and install the new fuel pump (though the pressure should remain at 2.5 bar for now). This will likely render the current map pretty useless though I would imagine that it should still fire ok and run well enough to limp to the rolling road (not far). As far as I can tell, all I will need to do is retard the ignition by a few degrees to compensate for the extra air and re-scale the injectors. I only need a fairly stable idle to run in the charger and then won't need more than 2/3k rpm to get it to the rolling road and I'll have a dash mounted AFR gauge so I can tweek it to make sure its about right anyway.
Hopefully though it'll fire first time and idle nicely so I can run in the charger and bleed the charger oil, power steering and coolant whilst checking for any leaks. That would be lovely. Of course it's not going to happen though - it never goes as smoothly as you hope!
I've since got it home and fitted a supercharger, new injectors, intercooler and all the other bits and have also to re-set the throttle and install the new fuel pump (though the pressure should remain at 2.5 bar for now). This will likely render the current map pretty useless though I would imagine that it should still fire ok and run well enough to limp to the rolling road (not far). As far as I can tell, all I will need to do is retard the ignition by a few degrees to compensate for the extra air and re-scale the injectors. I only need a fairly stable idle to run in the charger and then won't need more than 2/3k rpm to get it to the rolling road and I'll have a dash mounted AFR gauge so I can tweek it to make sure its about right anyway.
Hopefully though it'll fire first time and idle nicely so I can run in the charger and bleed the charger oil, power steering and coolant whilst checking for any leaks. That would be lovely. Of course it's not going to happen though - it never goes as smoothly as you hope!
450Nick said:
snippity.........got it home and fitted a supercharger, new injectors, intercooler and all the other bits and have also to re-set the throttle and install the new fuel pump (though the pressure should remain at 2.5 bar for now). This will likely render the current map pretty useless though I would imagine that it should still fire ok and run well enough to limp to the rolling road (not far)..........snip
Oh the days in my dad's mini and I took the air cleaner off, wound the main jet on the SU down three flats and got another 5 mph down the hill outside.........Good old tuning magazine - Cars & Car Conversions!!! (sorry couldn't resist)
Your's enviously.
Trev McM
Edited by K4TRV on Tuesday 9th September 14:20
K4TRV said:
450Nick said:
snippity.........got it home and fitted a supercharger, new injectors, intercooler and all the other bits and have also to re-set the throttle and install the new fuel pump (though the pressure should remain at 2.5 bar for now). This will likely render the current map pretty useless though I would imagine that it should still fire ok and run well enough to limp to the rolling road (not far)..........snip
Oh the days in my dad's mini and I took the air cleaner off, wound the main jet on the SU down three flats and got another 5 mph down the hill outside.........Good old tuning magazine - Cars & Car Conversions!!! (sorry couldn't resist)
Your's enviously.
Trev McM
Edited by K4TRV on Tuesday 9th September 14:20
No problem, I'll be happy to post some up when I'm back home. It's the SC-Power system but the first one run on wasted spark ignition and I'll be running the 500 spec charger. Then I've got a breather catch tank and some other bits as well as a brand new shape nearside ACT decat manifold to fit the existing ACT stuff but fit the charger setup (this will be available through Tim for others as well). - Should be lots of fun
450Nick said:
K4TRV said:
450Nick said:
snippity.........got it home and fitted a supercharger, new injectors, intercooler and all the other bits and have also to re-set the throttle and install the new fuel pump (though the pressure should remain at 2.5 bar for now). This will likely render the current map pretty useless though I would imagine that it should still fire ok and run well enough to limp to the rolling road (not far)..........snip
Oh the days in my dad's mini and I took the air cleaner off, wound the main jet on the SU down three flats and got another 5 mph down the hill outside.........Good old tuning magazine - Cars & Car Conversions!!! (sorry couldn't resist)
Your's enviously.
Trev McM
Edited by K4TRV on Tuesday 9th September 14:20
Trev
Thanks Alan, its going together fine so far and I can't see any sign of problems yet but there will probably be some gremlins when I get it fired up. Mapping this time is going to Paul at Austec I think as Tim at ACT reccommended him. He has a fair bit of experience with Emerald, lots of experience with RV8's and lots of experience with turbos and superchargers so he should be up to the job. He's also mapped lots of exotic stuff recently such as huge turbo yank stuff and a McLaren F1 so my Chim should be no problem
Gassing Station | Chimaera | Top of Page | What's New | My Stuff