I have had no such problems. I've only had one of those little plastic check valves in front of the UIM split apart, which happened at a drag racing event where I should have won $200 cause I easily had the fastest car in the 6 cyl. class until the final round when I got that boost leak. And a couple of times a vacuum hose came off that black plastic pressure chamber in front of the UIM, I put a zip tie on that one hose and neither has come off recently.

 

The thing With the BNR's is that you can run 18 psi with them all day unlike the stockers who honestly start to shed to **** after 15 psi. Even though you said you've been running yours on 15 psi which good but just like you said they wont last for long. Its just reliability if you ask me. Your forcing the stock twins. With the BNR's your not forcing them, they want to spin at 18 psi Countless stockers have bee blown up, **** i just blew mine up but i dont ever remember hearing a set of stage 3's seq or non seq blowing up.

 

Since the BNRs are 20% larger, I'm sure they will make more airflow at the same boost level as the stocks, so more hp, that's one reason I've been thinking I may want those instead of a single in the future. I like the sequential twins for street driving, although I haven't driven a single turbo. I don't like how they feel when non-sequential, like when you boost past 5k, then let off the gas but don't let the revs drop below 3k, and then floor it, more boost lag that way.

How or why did yours blow up, any reason?

 

u can get they same or close to the same performance from the stockers. albeit u can run the bnrs daily at higher boost though. but u dont need a 18/19psi setting on any turbo all the time in my opinion.

also....lets see....spend 2500 bucks for 20 rwhp with the bnrs or spend 4k for 150rwhp from a single. no brainer. you have ur opinbion and i have mine.

 

no cat and also have a m2 ic.

my wastegate is stock..no need to port it for me too.

my power fc controls my boost...i have a 12 psi setting and a 15psi setting. it controls boost perfectly. why it cant make more boost i have no clue buit i9 doubt its the pfc boost controllers fault. if it was then i wouldnt be able to change from 12 to 15 or whatever.its making more then 15psi thats the problem.

Does anyone have a power fc and is running more then 15 psi..if so post up your boost settings.

 

the rules you read are lies...point blank. i been running 15psi for 5yrs. tomrx7 has run more then that on a higher milegae car for a long epriod of time.

crank up the boost....just make sure u have enough fuel.

 

did u upgrade your map sensor to run 18-19psi?

 

what are u talking about?

 

the bnrs in sequential mode arent making more power then the twins at 15psi...maybe 15-20rwhp as i psoted.

i like sequential too for the street. but from what i have read over the past 2-3yrs is that the bnrs have only done some impressive stuff in non seq mode. people are getting 360-380 in seq on the bnrs....and as we know tons of guys make 360 on the twins at 15psi...i am one for for 5 yrs.

anyways screw the bnrs lets get back on subject....i;de like to hear from some others who run high boost on the stockers....is jodeny around or mrrx7tt.....anyone??

i am going for a ride....gonna try to crank the boost in this cooler weather....will be back soon. hehhe....she gonna blow...lol?

 

Nope. My last run at the track I turned up the boost a little, when I was in 4th gear I looked and the boost gauge was at 20, I looked at my wideband and it said 11.4 AFR, and my greddy boost controller said the max boost was 20.2. And I had the PFC on map tracer and I was in the 2nd to last row at the bottom. And at 17-19psi I always see 11.1 to 11.4 AFR..

So it does confuse me a little that I was able to run that much boost without leaning out, when people say the map sensor is good up to 17 psi. Maybe the turbos are not pushing much more air at 20 compared to 18psi.

 

Do you get more boost in 3rd and 4th gear? I do, I think I get like 1psi lower in 2nd gear compared to 3rd and 4th. that should be normal though.

 

My PowerFC boost settings are 1.30 and 20% Maybe try adjusting the % number also.

And my PIM volt value for 4.5 volts is 103.1%, 4v is 101.9%

PIM 8k and 7k rpms is 107%

That's so there is more fuel injected at those higher boost levels so I don't lean out. And the INJ map numbers were increased too.

 

you ain't lying... I overboosted to 23 psi (on stock twins) when my wastegate hose came off

 

Cool, now I know I can go up to 23psi and possibly run a 10.9 ET when I get my apexi 3 bar map sensor (ordered last night), my AEM Methanol/water injection kit (ordered last night), 99 spec y-pipe, and I think I will run some sunoco race gas. Might need some 4.30 gears to do it

 

What fuel are running @ 19 psi? I run at least 50/50 mix of 100 and 93 when boosting 16-17 psi. That's what we tuned it w/ as well. G

 

93 pump gas. I'm getting the water/methanol inj. for detonation safety and hopefully some more hp. The race gas I used a couple of times killed my wideband 02 sensors, but I think I found a sunoco that has unleaded race gas that doesn't hurt the sensors, so I may start using some of that too. Mine is tuned for pump gas.

 

nope 2nd gear gets same. maybe slightly lower.its normal to get lower boost in lower gears as u said.

i just tried to raise it again to 1.15 and 88% (i use pfc to control boost thats why % is alot higher) and still see only 1.03 peak. i see about 1.03 as peak even when its set to 1.05 and 78% or 80%. something is limiting me. even a couple yrs back when i tried to raise it i couldnt. this is annoying.

curious quest....does your power fc and profec b both read the same as far as peak is concerned?

 

another guy running more then 15....jeeze now i am fustrated!

what are u using to control boost?

did u have trouble gettign mroe then 15psi?

what is your peak boost value on the power fc?

 

I don't understand how you guys are running more than 17psi on the stock map sensor with out blowing up your motors. The Power FC has to be tuned and mapped for boost above 16/17psi and unless you did and have a 3 bar map sensor then you should be fine. Its a well known fact that the factory map sensor is in accurate above 16/17 psi. Maybe someone else can chime in and explain this phenominon to me.

R.K.

 

the power fc should be tuned for any boost level. 16/17 is no magic number. not following u there.

Yeah i thought u needed a 3 bar map sensor to run that kind of boost too.

 

I know you can tune it for any boost level but out of the box it is limited and usually mapped to the factory map sensor max psi which in this case is 17psi.

R.K.

 

i run 15.5psi on my stockers....but occasionally see over 16 when feelin frisky..

....i run the Blitz SBC-iD.....and a stock ECU...FCD, with AIC and 2x720's...supra pump....

 

What happens if you try a low % number? I don't know maybe try that.

I went out today, 19 max psi on my Greddy profec b and it read 1.18 max on the power fc.

Remember the Power FC is not accurate and reads lower than the actual boost pressure, so maybe I can run 19psi because the map sensor or Power FC thinks that is about 17psi, so any boost levels above that and it will read the same amount, this is why I don't want to go any higher than 19 or 20 without the 3 bar map sensor. I forgot to do the sensor check and see what the voltage was when I was under full boost, I should do that and see what it reads.

 

And if I run around 17psi, in map tracer mode it is on the P18 row, 2 rows from the bottom. When I run 19 psi, the map goes down to the P19 row. This is how I know the map sensor is reading more boost than 17 psi, so the PowerFC does know the pressure is increasing so it does add more fuel according to the P19 row in the Inj map. 19 psi as shown on the profec b and boost gauge is actually like only 17psi according to the Power FC (it doesn't read the correct actual pressure). This is probably why I am able to run 19-20 psi without a problem. Now I can see how anything above actual 20 psi would be a problem, the stock map sensor probably won't read any pressure higher than what I'm currently running.

 

BNR are my future turbos