Ve tables after bigger injectors.

[Thmpar]

Hello everyone,
The VQ has been alive for a bit and tuning has been good fun,
But the blue top injectors maxed out quickly as suspected but that was the
Budget at the time.
Now have 60 lb Siemens fitted, so an increase of just over 50%.
Am I correct in thinking once I change the kinjiflow numbers
And knock all the VE tables back by about 50% I should be pretty
Close to where I am now in the tune.
Only want it to be close again before I go and dyno it.

[VL400]

You only need to adjust the kinjflow value and the injector opening tables. The VE table stays as is. This assumes the injector opening table was setup with the blue tops. If it was left as default then the VE will be out a bit, but should be close enough to get it to start and run.

Other things to tweak are the cranking fuel tables, will need to pretty much halve them.

Might also be worth setting up single fire at low load. Make sure to leave the double fire flag cleared (Map X: set=Single fire option, clear=Double fire option), then set "Run A/F Param - Minimum BPW for sync double fire fuel delivery (Upper Value)" and "Run A/F Param - Minimum BPW for sync double fire fuel delivery (Min Value)" scalars to around 2.5 and 2 ms respectively. This will switch to single fire at idle at light loads, and back to double fire under load.

[Thmpar]

Thanx VL, once I get it back together i shall change all that
Before starting it.

[antus]

Just some extra info to explain further - the VE table is the main way the computer models how much air ends up in the cylinder at given pressure and rpm. The injector rate allows the computer to know how quick the fuel streams out the injector once its open, and the opening times/dead times (whatever you like to call them) represent how long the injector take to open once the computer triggers them (and at given battery voltage). This makes the most difference at idle where a high flow injector might take say 2ms to open, then only need to be open for 0.5 (thus the computer needs to use 2.5ms. If your opening times are set for say 1.75ms, then the ecu will trigger them for 1.75+0.5=2.25ms, so in reality the idle fueling will be out by half. Dekas are good as the proper opening times are available.

[Thmpar]

Thanx Antus,
I believe I have just pulled the info needed from the Siemens website,
Will look into all this one night soon I hope.
I never set the injector opening pages so will start there and progress through.

[antus]

See the data Holden202T has put together here:

http://pcmhacking.net/forums/viewtopic. ... 868#p32885