using low impendance injectors
6 posts • Page 1 of 1
using low impendance injectors
If you wanna use low impedance injectors i found this little bit of info that could be helpful
http://www.lextreme.com/R&D%20Injector.htm
now you can fit those low impedance injectors without much hassle.
can a mod sticky this as its always being asked
http://www.lextreme.com/R&D%20Injector.htm
now you can fit those low impedance injectors without much hassle.
can a mod sticky this as its always being asked
- Ruishy1
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Re: using low impendance injectors
Ruishy1 :If you wanna use low impedance injectors i found this little bit of info that could be helpful
http://www.lextreme.com/R&D%20Injector.htm
now you can fit those low impedance injectors without much hassle.
can a mod sticky this as its always being asked
i would just buy low impedance injectors .in fact i have just ordered 16 750cc low impedance injectors from the states
- crazycage
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Re: using low impendance injectors
but not evryone has cash to throw arouind
- Ruishy1
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- Location: Sunny Kilmarnock
Re: using low impendance injectors
Ruishy1 :but not evryone has cash to throw arouind
there not expensive a set of four 750cc from the usa is only £130.
- crazycage
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Re: using low impendance injectors
You cannot use non-saturated injectors, the Impedance is completely wrong guys, you need to match to impedance not just the resistance. This is not an easy matter though as the impedance of the injector will change over the frequency range.
i.e. Impedance(Z) = XL + XC + R
Where XL = 2.pie.f.L
and XC = 1/(2.pie.f.C)
therefore
Z = 1/(2.pie.f.C) + (2.pie.f.L) + R
At low engine revs, the inductance(L) of the injector controls the value of the impedance as the capacitance will be negigable BUT as the frequency(f) increases the inductance(L) reduces and the capacitance(C) increases to a point where the capacitance will control the impedance. The resistance stays the same. The trick is to balance to characteristic L and C values with external Inductors and capacitors so that the impedance stays at the desired constant value throughout the operating frequency range (1000 to 7000 Hz).
It's really not worth it with EEC-IV. It's different if it's been live mapped with them. Peak & Hold's are really old hat nowadays. There are plenty of sensible saturated options available at decent prices these days.
Steve
i.e. Impedance(Z) = XL + XC + R
Where XL = 2.pie.f.L
and XC = 1/(2.pie.f.C)
therefore
Z = 1/(2.pie.f.C) + (2.pie.f.L) + R
At low engine revs, the inductance(L) of the injector controls the value of the impedance as the capacitance will be negigable BUT as the frequency(f) increases the inductance(L) reduces and the capacitance(C) increases to a point where the capacitance will control the impedance. The resistance stays the same. The trick is to balance to characteristic L and C values with external Inductors and capacitors so that the impedance stays at the desired constant value throughout the operating frequency range (1000 to 7000 Hz).
It's really not worth it with EEC-IV. It's different if it's been live mapped with them. Peak & Hold's are really old hat nowadays. There are plenty of sensible saturated options available at decent prices these days.
Steve
- Captain Tightpants
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- Location: Somerset
Re: using low impendance injectors
well thats me told
just found that and people were always asking bout it so thought it stick it there
just found that and people were always asking bout it so thought it stick it there
- Ruishy1
- Elite Post Master
- Posts: 4006
- Joined: Thu Mar 25, 2004 8:43 pm
- Location: Sunny Kilmarnock
6 posts • Page 1 of 1
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