With INtake, SMIC, MP, DP, CB and clipped, ceramic coated turbos?

Will teh power fc be able to handle 14.7 psi safely without a ported wastegate????

 

If your turbos are only coated and not clipped etc then the boost patterns/flow rates etc should be "normal" correct? And isn't boost creep usually a problem when trying to keep the boost low? I think if you have the fuel mods to run higher boost then simply running it is a way to prevent boost creep because you're not trying to force so much throught the wastgate to start. That's what I think, but await more responses as I'm sure you will. Later~

Alex

 

yeah you are fine up to one bar

 

i HEARD THAT AFTER 17 PSI THE PFC DOESN'T KNOW WHAT TO DO AND THAT COULD MEAN KABOOM....

 

Well, think about it... the stock MAP sensor is a 1.2 kg/cm^2 pressure sensor (PFC manual, page 28). That's 17 psi, so that would be the limit when using the PFC as a boost controller. If you want more boost, go with an aftermarket boost controller that comes with it's own 3 bar map sensor.

-Scott

 

Is very dangerous to run +0,85bar with fuel from gas station.

 

My stock MAP sensor never reads above 1.15 kg/cm^2 no matter how high the boost goes, so that is the controllable limit on my car. That is close to the claimed 1.2 limit for the stock MAP sensor.

It isn't just a matter of boost control, but rather the problem is that the PowerFC won't know to supply more fuel if you boost above that pressure, so you can't really do it safely -- there is no good way to tune the car to run more boost than the sensor will read.

-Max

 

Hell no

That is seriously way too much boost without upgrading your fuel system. If you want to run that much boost, I strongly suggest getting 1300cc secondary inj and upgrading your fuel pump. Also, some tuning will be needed too.

 

Is that with or without straight pipe?

I heard that with straight pipe I'll get about 2 psi of boost creep and KABOOM.

If I retain the Main Cat i should be OK?

even better with ported wastegate....

 

I road race my ported fd with 14 lbs. boost and have yet to have a problem (850cc secondaries). For some people the1300cc's are a waste of money.I run stock turbos and downpipw and 3.5 inch exhaust. Anyone selse do this????

 

at 14 psi, should your injectors be maxing out? That's DANGEROUS...

 

That should be safe but on the ragged edge. Boost creep and ur in for it.

i know 4 people running ur setup and they are ok.

the main-cat will keep boost levels relatively constant.

 

If you want to use a MAP sensor that can read more than 17psi with a Power FC, you can purchase a 3 bar MAP from APEXi, it's included in the boost control kit for the Power FC, OR if you don't wanna spend all that money and don't need a boost controller, just go out and purchase any GM 3 bar MAP sensor, when installing it all you have to do is choose a different option on the Power FC, and make sure that the PIM voltage is adjusted properly, you can even adjust that to make it read the proper boost and vaccum.

 

If you want to use a MAP sensor that can read more than 17psi, you can purchase a 3 bar MAP from APEXi, it's included in the boost control kit for the Power FC, OR if you don't wanna spend all that money and don't need a boost controller, just go out and purchase any GM 3 bar MAP sensor, when installing it all you have to do is choose a different option on the Power FC for the boost sensor, and make sure that the PIM voltage for the boost sensor is adjusted properly, you can even adjust that to make it read the proper boost and vaccum(that's easily checked by comparing it with a boost guage).

Sorry I had meant for it to read like this to include additional info.

 

THE PFC HAS BOOST CONTROL.

SO WHY WOULD I NEED AN ADDITIONAL ONE?

 

The power FC controls the sequential turbos, but will not control a single turbo kit. For that you need the boost control kit from apexi that includes the same solenoid as the AVC-R.

eric

 

ok... well i am keeping SS setup.

 

Off hand, anyone know what the GReddy Profec-B
is capable of?

 

Profec-B - 30psi? I don't know, but that isn't the issue. The fuel computer needs to know how much boost the engine is seeing to supply the correct amount of fuel. So, you MUST get a MAP sensor for the PowerFC that can read more than 17 psi if you want to have control over the fuel supply at those pressures. The ability to control boost is secondary.

-Max

 

1 Bar is 14.5 psi

 

i thought it was 14.7psi

 

The higher I set my boost on the PFC, the ******* it gets at controlling it.

I set my boost at .80, it maxes at .83 constantly. I set my boost at .90, and I see .99 or 1.1 on a regular basis.

Soon as I get the more necessary stuff, profec b here I come...

 

Max, what does your Commander read for atmospheric pressure static with the the engine off? If it's low then that could be the cause for the lost upper range headroom.

Mine was low & I had to adjust the offset to zero it out. I haven't tested the upper limit to my boost sensor though since I've only got ~560 miles on my new engine...

 

I thought 1 bar = 14.7 psi

 

1 bar = 14.5 psi =29.53 in hg=750.1mm hg=1.02 kilogram per square meter (kgf/cm2) etc etc etc


For all your conversion needs see:
http://www.convert-me.com/en/convert/pressure