Split Second PSC1

[AznTwins]

Does anyone have any experience with tuning the PSC1 or using the R4 software from Split Second. Any help would be really apreciated. www.splitsec.com

[mrtomcat]

It's fairly straightforward and there are not many options which is good and bad, good because it's easy to learn, bad because you're very limited.

If you start from scratch you need to create a new customer and set a few settings.
Under options select system and then set Vacuum/Pressure and Program Signal Calibrator under Engine Settings set 4 cylinder and 4 stroke
under Output:
pwm Pressure 0 to 30 psi
output a Aux Fuel pump with abortive start time
output b Over Pressure
over rpm 100
Fuel pump start -0.5
over pressure 0
Fuel pump run time 3
over inj % 20
fuel pump start time 120
then connect to your psci by setting the correct com port

Under the fuel maps you'll see rpm and boost
10 is neutral (factory ecu)
below 10 is take out fuel above add fuel
in our case we left anything below 0 boost at 10
Using the buttons at the top you can increase by percentage or fill multiple cells and so on.
In order to save to the psc1 you need to have the engine off and the ignition to on and click the write to ecu button at the top screen.

Hope this helps a bit,
be conservative and use a dyno with a good wideband

[AznTwins]

Ok here are the settings i have that are different than yours. I don't understand why its off by so much. Thanks for the help.

Output C Inj A and B over/latched
Over RPM 6000
Fuel Pump start pressure Psi -1
Over pressure -2.99
Over INJ% 90

[mrtomcat]

The first value (output c) I got the same, I just forgot to list it.
Since we both have Output b set to Over Pressure the Over RPM value is not used.
The Over Pressure value based on my interpretation of the manual should be set to value next to our maximum set boost, in my case 11.5 - if my pressure goes above 11.5 drop boost.
<from the manual>
If you select "Over Pressure" the output will pull to GND when the manifold pressure is above the value entered in "Over Pressure Psi". The output will return high when the manifold pressure drops back below the value entered in "Over Pressure Psi".
<end manual>
The Fuel Pump start pressure range is between -2 and 12 PSI
some people had issue on cold starts and I solved mine by leaving the ignition in the on position for about a minute before starting the engine. Someone else posted that splitsec said to increase the Fuel at idle by 3% - that might be where -
Stafford told me that he might have to set the Fuel Pressure higher on start up but we never got to it....I bet cha that's where that takes place. If you're having the same issue you might want to increase this value a bit (mine is at -0.5 I'm going to try 1.0)

the Over Inj% I just simply don't understand here's the excerpt from the manual:
If you select "Inj A over /Latched" the output will pull to GND if the injector time for Map A is over the duty cycle entered in the "Over Inj %" filed. Once this output is activated it will stay activated until power to the controller is removed.
If you select "Inj B over /Latched" the output will pull to GND if the injector time for Map B is over the duty cycle entered in the "Over Inj %" filed. Once this output is activated it will stay activated until power to the controller is removed.

Select "Inj A and B over /latched" if you want the output to trigger for both "Inj A over /Latched" and "Inj B over /Latched" modes.
You can use this to help determine if you have exceeded the duty cycle time of an injector.
Due to the limited current available from this output you should drive a relay. This output pulls to GND when active.
<end manual>

just my few thoughts

[Boosted2.0]

AZN,

I've had a bit of tuning time on the SS unit now, and I can tell you thats its pretty easy to work with, but its kind of a pain for a few reasons.

1 - fuel pressure is not static because of the rising pressure regulator because of this changes you make may make a bigger or lesser difference at different and RPM points (0.1 change at 7PSI at 6500 RPM may make more or less difference than a 0.1 change at a diferent rpm)

2 - smoothing the A/F curve is a PITA. The PSI makes decent power on the map stafford sends but the AFs are a bit peakish. smoothing it is possible but it takes quite some time.

3 -when tuning itthe thing to keep in mind is that the reference points it lists are the END of the block not the beginning. For instance one might think the setting for 5000 RPM and 6 PSI would encompass anything from 5000-5500 and 6 PSI to 6.5 PSI but you would be wrong. It drove me crazy till I figured it out, but the points it lists are actually the UPPER limit of that load block not the lower. so the 5000 rpm 6 psi block is actually 4501-5000 rpm and 5.6 - 6 PSI. As soon as your rpm hits 5001 you would move to the 5500 6PSI rpm block and as soon as the boost went to 6.1 you would wind up in the 5000 rpm 6.5 psi block.

Hope that helps or makes sense. I'm going to try and work with Thomas to see if we can figure a way to so some street tuning for teh A/Fs using his wideband. If we do I'll try to post some advice on that.

[AznTwins]

Ok thanks for the help.

[mrtomcat]

yeah boosted rocks!!!

[mrtomcat]

I just had a bad experience yesterday.
I wanted to upload the fuel pressure start up changes but accidently hit the download FROM ecu button, even though that should have worked my car started bogging like hell and I got Cels up the yin yang. I had to restore the map from a backup.
So make sure you ALWAYS have a backup of your working map before making any changes and I don't why the dowload from does not work right.
Scared the hell out of me