I just installed a deck and I had to disconnect the battery which lost all settings on my boost controller and now I do not know what settings I should set. I have a stock ecu and want to run on stock boost. Here are the mods.

MODS

-Power/Drivetrain-

*Greddy Intakes
*PFS Intercooler
*HKS Mild Steel DP
*Racing Beat Dual Tip Exhaust
*RPS Performance clutch (street disc with a sport pressure plate)
*Unorthodox Racing Underdrive Pulleys, anodized blue

-Cooling-

*M2 Radiator
*Aluminum AST

-Guages/Electronics-

*Greddy Profec B spec ii in a custom akiratdk din plate
*Greddy turbo timer
*Blitz boost guage in a RE-A steering column pod
*White faced gauges, reverse glow with dead needles

-Suspension/Misc-

*51R Battery Tray
*Ebay Torque Brace
*Ebay Strut Tower Bar
*Tokico Struts
*SO-3 Pole Position tires w/80% tread
*HKS blowoff valve
*Fan switch mod
*California Car Cover, custom fit cover

-Exterior/Appearance-

*Efini emblems
*Painted R1 lip
*Feed headlight cover
*Intake piping, UIM, battery tie downs, and AST have been powder coated wrinkle black
*Glossy black interior panels
*RE-Amemiya replica carbonfiber tail light cover
*Custom license plate frame “I love my zoom! zoom!”

 

Every car is different, you have to come up with your own settings....lots of tuning write-ups on the forum....just get out there and tune it.

Did you even try to search first:

https://www.rx7club.com/search.php?searchid=1531195

 

do u really lose the settings?? i havnt noticed because its usually been off and it needs to be retuned anyway...that could screw me over because i disconnect the battery cuz it likes to die!!

anyway...every car is different. just go and retune it. maybe keep track of what settings u end up with. if i was smart i would have done that.

 

I did some searches and tweeked the settings a little and this is what I have so far

Set:37
Gain:7%
Set Gain: 90
Warning: 105
Warning L: 99%
Peak: 104

So I did some runs and it seemed to be fine I guess. Boost is held at 10, my warning beeps never went off. I checked what my peak boost was after a couple runs on the freeway and it was at 104. Does this seem about right?

 

Bump for answers

 

Bump for answers please!

 

https://www.rx7club.com/forum/showth...t=profec+boost

 

https://www.rx7club.com/forum/showth...t=profec+boost

 

Ok, I went ahead and drove the car a little today to see how the settings were and this is what I got out of it.

Everytime I got on the acceleration my boost would hit the 10.5 and then go down to 7-8psi because I set my Warning L to 99% which means when it hits my Warning of 105 it will kill the boost and go down to 7-8. I need to find a way to basically have it be able to reach 10psi and hold that but I'm scared of changing my Warning L to less than 99% and it spiking a blowing my engine. Since it seems to always be reaching 10.5psi, how much should I drop the Warning L in able for it to hold that?

Second thing I noticed is that my second turbo didn't seem to feel as if anything was kicking in, it seemed when I was in the higher RPM's it would stay around 6-7psi for a while while the rpms grew and then finally went up and hit my peak setting and back down the 7-8psi because of having my Warning L set at 99%.

I think I just need to find a % that will lower my boost just a little whenever I hit my peak so I don't drop all the way down to 7-8psi.

 

if boost is falling off at high rpm you need to increase the gain.

 

I thought I read in the book though if the boost is spiking that you should lower the gain by 2. I'm just scared that by raising the gain, it will make the boost even higher.

So that would be a fix for the higher rpm range, but how about for the lower where I keep hitting my peak psi and I want the boost controller just to drop it a little like I have my peak set at 10.5 I believe, and whenever it hits that I have it set so it turns off boost (goes to 7-8psi) so how can I make it so it just drops to 10psi? Lower the 99% to around what?

 

Dude, you just have to lower the target/start boost level setting!

 

What? As you can see I'm new to all of this, sorry :-(

 

Have you actually read the manual? Everything you need to know is on pages 16-17. All you have to do is raise or lower the "Set" level to raise and lower boost. The Gain will change the sharpness of the response. The higher the Gain, the better, up to the point the boost becomes unstable. Setting the Start Boost level close to the Set level will result in quick spool but may result in spiking.

All you have to do is read the manual, man.

 

I did read the booklet, I just get confused with everything. Not only that, I'm just worried about messing with the wrong thing and that one time where I go and try to test it out is where I spike and blow the engine or something goes wrong. So I should lower my set since boost is reaching my peak every single time?

With gain you say higher the gain, the better? My gain is only set at 7%...

Is the start boost level the "set gain"?