Electronic Boost Controller Setting Help

[Muffins 34]

Have recently installed a Blitz SBC Type S Electronic boost controller into my GT-T. I've blocked the boost sensor line so it will no longer cut but now as I try to increase the boost over 7-8psi (aiming for 12-14psi) I tend to start getting flat spots throughout the rev range. Has anyone had this problem that can help me out?

Cheers in advance.

[MatthewT85]

list your mods first

[Muffins 34]

Oh sorry. Standard 25DET NEO, 3 inch exhaust system, blitz air filter, splitfire coilpacks, and the blitz controller stated.

[Ben C34]

Get car tuned with something (I would go nistune) or you will have a shot result just raising the boost.

The factory ecu is very rich.

[MatthewT85]

yeah to be honest i dont think a boost controller is needed until upgrading turbo ect

[GTSBoy]

You will be well into R&R territory once you're at 12 psi. Once you go over that, it will start to be horrible. Nistune is a must.

Oh, and you won't need to blank out the ECU's boost sensor unless you're aiming for much more boost than that.

[Muffins 34]

Cheers guys. I'll look into a nistune.

[Badgaz]

do you have a fmic?

[Muffins 34]

do you have a fmic?

Nope

[Dose Pipe Sutututu]

leave it alone, good luck getting any more than 0.7bar through the motor with the stock ECU

[Kane_R32]

Guys can someone confirm if R&R is triggered of the AFM voltage? i,e over 4.5v will send it into R&R?

[GTSBoy]

Not by voltage directly. Voltage is used to calculate TP. TP is the load axis on the fuel & ign maps.

So yes, but no. Same voltage on the AFM at different rpm will calculate a different TP.

[Badgaz]

Not by voltage directly. Voltage is used to calculate TP. TP is the load axis on the fuel & ign maps.

So yes, but no. Same voltage on the AFM at different rpm will calculate a different TP.

my tuner has talked about increasing the resolution of my map, i figure its something to do with this calculation....does that sound right?

[GTSBoy]

No. You can arbitrarily set the value (TP or rpm) of any column or row. So, if the max TP that you load up to is, say, 100, but your map has columns up to 160, then you could rescale all the columns so the last one was maybe 110, giving you more resolution. Alternatively, and more commonly, your last column might be 160, but because you've wound up the boost you are working up to loads of 180 or so. Then you might rescale to stretch it out. That would be the opposite of giving it "more resolution" but might be what your tuner meant. It means that you can explicitly tune for the loads you are actually running, instead of running off the end of the map and letting the ECU extrapolate what fuelling or timing you want from the last row (which is what it does by default).

[Badgaz]

i'm only getting to load points of 15-16 and i'm keeping within a 7100rpm rev limit...so maybe he does mean to rescale to get greater resolution. On the current turbo i'm at its limits. 16psi.