The amount the injectors flow is worked out by the Duty-Cycle.
The ECU has a Duty-Cycle based fuel map.
SO
If you change your injectors from 450cc to 750cc, you would need to reduce your Duty-Cycle by 60%.
I take it both your old and new injectors are LOW impedance.
If not, there is a lot more work to be done because a 450cc LOW impedance injector will flow differently to a 450cc HIGH impedance injector, if given the same duty cycle.
The reason, HIGH impedance injectors take more time to switch on and off.
Cheers.
changing injectors
-
- Posts: 1689
- Joined: Sun Mar 22, 2009 4:12 pm
- Location: Sydney
- amgis_obrut
- Posts: 1742
- Joined: Wed Mar 18, 2009 6:26 pm
- Location: Orient Point NSW
Re: changing injectors
you need about 5.5cc of fuel per hp
to work out injector sizing its
hp divided by number of cylinders x 5.5
eg
300 / 4 x 5.5 = 412cc per cyl
to work out injector sizing its
hp divided by number of cylinders x 5.5
eg
300 / 4 x 5.5 = 412cc per cyl
GH Sigma, 16" Mesh wheels, sports steering wheel and a V8 exhaust