Just thought all you guys that say it can handle only 7-8 PSI would like to see this. here is the e-mail I sent greddy and their reply

> I have the the minor change version of the turbo kit on my 93 Si and have a
> question about the included FCU. what is the max PSI the fcu can handle?
> Also what is the highest rpm the FCU can handle.
>
> thanks,
> David Eriquez

The unit is only limited to your factory MAP sensor and ECU settings. Since
your factory MAP sensor is maxed out at 11-12psi the FCU is limited to fuel
control to that point. And because to change the factory rev limiter you
need to reprogram the ECU, the FCU is not guaranteed since it was designed
for use on a stock ECU.

----well i feel better about running 10 PSI for the last year on it. but i have been running a 7600 rpm redline. I guess I'll use my shogun hypertuner to richen the mixture after 7200 to make sure i'm still ok after the factory rev limiter.

 

what injectors would I need to run 10 lbs. with the blue box?

 

use 310's, but i ran 10 psi on a FMU and check valves....no problems.

blue box better than fish tank parts IMO

 

440cc

 

one person says 310cc's for 10 psi.
another says 440cc's.
too much conflicting info. on this site

WHO'S <U>RUNNING</U> MORE THAN 8 LBS. ON THE BLUE BOX?
WHAT INJECTORS ARE YOU USING?

 

too many cooks....you know the rest.

 

I see where you're going with that, but I honestly forgot the rest of the phrase

 

if you are going to run bigger inj you need to recal. the fmu (in case you didn't know)

310's and a 8:1 disk would handle 10 psi, I'm sure 12 too

 

im running 10psi on stock injectors....have been for 1.5 years

 

im guessing this goes for ALL blue boxes?? and does anyone know if i need new injectors AND a new pump?

 

My brother had my kit before me and he chose to run the damn thing at 10 psi everyday with stock injectors and timing. He had a dsm SMIC, 255 fuel pump, and upped the fuel pressure a bit. Worked fine for him but I'm going to go with the hack instead. I don't trust it.

93TurboSi, have any numbers at the track yet?


Modified by boostsohfast at 2:58 AM 5/26/2003

 

9-10 psi run 310 not 440 u wont idle without something to control those injectors...the stock 240cc technically wouldnt support 180whp safely on aboosted car...upgrade and play it safe...

 

hmmm, id say just get hondata in there

 

I could not run 8+ psi! I would start to hear the marbles in a can and would back off. After all of my overheating problems and dissapearing coolant, a closer inspection revealed It blew my head gasket.

 

Cost of blue box: $0 (included with kit)

Cost of Hondata: Let me break it down -
OBDII-OBDI - 200
P28 ECU - 200
re-socketing - 60
S100 w/boost - 450
Dyno tuning - 300
Total (probably stuff I forgot) ~ $1,200

For low boost, no thank you
Blue box for low boost

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18bturbo &raquo;</TD></TR><TR><TD CLASS="quote">440cc </TD></TR></TABLE>

hes using the bluebox..from what people who have tried it say..it does not like that big injectors..youll run REALLY rich..

 

thats funny. I emailed greddy when I had my blue box and they told me it was only good for the stock wastegate settings.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOLDBERG &raquo;</TD></TR><TR><TD CLASS="quote">
hes using the bluebox..from what people who have tried it say..it does not like that big injectors..youll run REALLY rich..</TD></TR></TABLE>
Exactly. If you are keeping the blue box you have to keep the 310cc that is what the fuel maps in the blue box are designed for. Unless you get something else to control the fuel you wont be able to use larger injectors.

 

my friends ek hatch gsr swap with greddy kit has been running 10 pounds for a year now with no probs and the greddy 310's with a profec b

 

bump...this is a good thread for those looking to get the most out of the blue box

 

can somebody explain how to recalibrate the blue box if i upgrade injectors? right now im running stock with 5.5 lbs boost but i want to turn it up to 7 or 8 when i get my intercooler in.

 

is this really true? blue box with 10/11 psi?.. id need more then just an email from some greddy personal that sells the item from there warehouse...was this a tech guy you emailed?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by skierGT &raquo;</TD></TR><TR><TD CLASS="quote">can somebody explain how to recalibrate the blue box if i upgrade injectors? right now im running stock with 5.5 lbs boost but i want to turn it up to 7 or 8 when i get my intercooler in.</TD></TR></TABLE>
You cant. You can use a VAFC to adjust the fuel maps some.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by romeo619romeo &raquo;</TD></TR><TR><TD CLASS="quote">is this really true? blue box with 10/11 psi?.. id need more then just an email from some greddy personal that sells the item from there warehouse...was this a tech guy you emailed?</TD></TR></TABLE>
I dont know if I would run 10-11psi on the bluebox. The blue box is written for 5.5-7psi I would not push it and run 10+psi on it. Why risk it? You fuel maps change drastically from 5 psi to 10 psi. You might run rich in one area and lean in another.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by romeo619romeo &raquo;</TD></TR><TR><TD CLASS="quote">is this really true? blue box with 10/11 psi?.. id need more then just an email from some greddy personal that sells the item from there warehouse...was this a tech guy you emailed?</TD></TR></TABLE>

yes, true.....i've run ~10psi on stock fuel (minus 255 high pressure intank fuel pump) for almost 2 years and 50,000 miles. try it on a dyno, if you don't like the numbers it puts up (a/f), then you'll have your own personal proof of running a certain amount of boost.

 

OK, This is the best opportunity I have to finally show blue box users what actually happens. (In other words Im too afraid to post my own thread about this.)
In testing I used the newest Honda PGM tester that we have received about a month ago. This is what I found......
The blue box has predetermined tables for boost with 310cc injectors and the Greddy turbo kit right.....????? WRONG!
As a matter of fact it only has two functions.
One: Block a positive pressure signal from your MAP/Baro sensor by intercepting it and reconfiguring the signal to Honda's acceptable signal voltage for WOT.
Two: Idle your car with 310cc injectors at a respectable A/F ratio. (I said respectable, not perfect)
Soooo, after you break out of idle the Honda computer takes over and your right back to your original Honda tuning map. The way I worked this experiment was to test my car and take snapshots of my OBD-II data-list in different situations (eg. WOT, idle, partial). Then using the same car (99' Civic Si) without any modifications did the same. What I found was interesting to say the least. At idle, on my car injector duty cycle was much lower that the stock car, OK. But at WOT and partial...the exact same reading with extremely slight differences due to changing conditions like temperature and barometric pressure.
So, in closing I would like to say to all those who blame the dreaded blue box for the death of their engine...don't blame the box....blame Honda or yourself for over-boosting. Hope this adds a little enlightenment to all.