Scangauge question?

[Kason23]

How accurate is the aeroforce scangauge when it comes to the HP reading? Does it do flywheel?

Mine just said 490hp at about 5500 in the top of 4th. How much is our drivetrain loss?

[apexcrazy]

I believe it is roughly 10%-15% higher than whats at the wheel on a completley STOCK setup .
If I had to guess it is based on the torque target number that the ECU is constantly calculating for wastegate control purposes . That number is an extrapolation based on all sorts of data such as boost , injector flow , ect .
When you consider that the ECUs calculations are probably meant to reflect flywheel HP , then the 10% or so error on the high side makes sense .
I think that most interceptors have a correction factor setting in the gauge that will allow you to syncronize your readings to reality if you wish . This can be accomplished by comparing actual dyno results to gauge readings . if the dyno says you are making 300 , but the gauge says you are running 330 , then set the correction factor to 0.91 . at that point your guage may not be absolutely perfect , but it will be very close to actual HP in most of the range .
Of course , changing things like volumetric efficiency (porting), bigger injectors , different turbo , map clamps/piggybacks will all have an effect on the calculations accuracy .
Even though my gauge is not spot on . it is still very usefull data in a relativistic way , that is , if I make a change in my tune I can see the difference between the before & after pulls . If I see a 10 HP increase , I know that may not be the exact increase , but I know Im on the right track . If I make a change that nets me nothing , or reduces HP reading by 2-3 HP , then I know not to go that direction . Get what I mean ? Its a tool , not a certified mini-dyno .

[Kason23]

Well my sensors and injectors are indeed scaled correctly using the dsp. Im just wondering because the car seems to pull harder now that its gotten cold. 40 degrees compared to 90. I had to add my fuel back in so im at a 11.3ish AFR on 25-26psi,30* of timing and no knock in 40 degree weather.

I will have to dial it in on the dyno next time I go I suppose

[apexcrazy]

Im not certain that just because a set of injectors are rescaled absolutley perfectly , that the rescale wont pull the HP "modeling" of a little . Remember , all the calculations/extrapolation going on assumes you are using the injectors supplied by Mopar . That and your big turbo no doubt flows much more air at a given PSI than a stock turbo .

But I am beginning to start talking out of my ass here .

Since there is no "owners manual" with flow-charts for this ECU , its anybodys guess exactly how the ECU thinks & does its math . The only person I know of that had a concrete grasp of this ECU is Blackbird RT . There are many on here that that know a lot more than me , but he seemed to know the most . Wonder how he is doing ? Havent seen him post in a long time .

[Kason23]

Me ether..You used to see his post all the time in very detailed explanation...

I just got this gauge mostly to use as a boost gauge and it is dead on with the readings my DSP gives me along with what my mechanical was showing. I like it ALOT better then trying to watch a needle.

Also do you know how to set the warning light to go off if knock shows up? can that be done?

[apexcrazy]

Yes the later versions (interceptor pro) have the ability to light the two red leds when a programmable setting is reached on any parameter of your choice , or trigger a output signal to control other equipment . My guage is an older version so i dont have that feature unless I send it in for a software update . Therefore I dont know how to set it .