Zhé

iTrader: (2)

i been tryin to figure out and understand the whole boost concept, i was on track till out of no where i got confused, now my brains just keeps throwin questions to my self.
anyways, questions like
if my electronic value controller is at .85 bar, that means my car is runnin at 12 PSI?
im runnin full non seq with 3" full exahust, dp, mp, i believe i have a pre cat,
i got a PFC which was tuned for 10 PSI, but my car is set to 8 PSI,
i just keep generatin PSI and boost numbers im so damn confused.
so at WOT, my boost gauge shows that i go up to 12 PSI and stay at 12 psi till i let off throttle.
if the boost guage shows im at 12 psi MAX, does that mean my car is set to 12 PSI and not 8 PSI?
what the *#^*# i just confused my self even more
help this alocholic out! thanks!
also, one of my controllers / gauges has this constant beep sound when i hit 12 psi and beeps until i let off
is that warnin me im at peak boost or im over doin it

Sideo

Your post is kind of confusing. You mean you are set at 10 psi but at WOT you get to 12 psi? you probably will get boost creep unless you have a ported wastegate with the full exhaust

nvmyre

yes you are running 12 psi if your boost controller is set to .85 bar you are telling it to boost to 12psi your computer might be tuned to 10psi but you are running 12psi ....
i dont thinnk there is a real problem as you will also find different boost levels at night and in cooler air the boost level might spike
here is a useful conversion table for you though.
http://www.unitconversion.org/unit_c...essure-ex.html

Zhé

iTrader: (2)

well pfc base map can handle 12 psi right?
i do have full 3" exhaust
when the boost reachs 12 PSI, it stays steady
so that means im fine BUT i should get it tuned for 12 PSI or lower it to 10 right?
i swear it was set at 8 psi, maybe the shop turned it up after maintence
also, if i were to turn off the boost controller, does that mean i go back to stock lvls the PFC is set to?
thanks for the nice chart and info guys!

cptpain

iTrader: (1)

if you turn off the boost controller, your boost levels will be at wastegate pressure, and given you're non-sequential, it means you'd be around the 7-8psi level with the BC off.

i always recommend that once they get a programmable ECU, regardless if it has a base map, to always get a tune.

i have seen instances where a base map for an ECU ran so rich, that it washed out the cylinder walls of any oil film causing the piston rings to prematurely fail.
of course on the FC/FDs with PFC i have not seen this happen, but it never hurts to get a real tune and enjoy the fruits of your labor

Zhé

iTrader: (2)

hm just went for a test, with boost controller on, boost his 12 psi for 2 seconds then BOV vents, resettin PSI to about 7 and raises again.
boost controller off, max boost is only 5 PSI
dont think im that confused anymore, thanks alot guys!

moconnor

iTrader: (14)

I'm still confused.


And you claim to be running full not sequential but you are getting a 12-7-12 boost pattern?

You also claim to be running a full 3" exhaust yet may have a stock downpipe? So is it or is it not a full 3" exhaust?

The PFC base mod map may not handle a mid pipe - you should get a wideband to check your AFRs.

Zhé

iTrader: (2)

3" full exhaust includin 3" dp
high flow cat
my boost hits 12 at around 4.5k, then bov comes out, reset to 7 and goes back up as if it wants to pass 12 but boost controller wouldnt let it, so instead of stayin steady at 12, it resets
anywyas, boost controller, off, went for another run, seems to be goin 6 PSI now
no longer really confused,