Mazda RX-7 FD3S sequential turbo boost curve

[rotor13]

nothing is wrong with the car..... this is the factory boost pattern with raised boost.

[Slidingmy240sx]

i have that same guage......lol. i was pushing 8psi...and it only read up to 5 lol

[pallymeat]

Its an autometer, prolly mechanical. So yea, its likely a piece, but if that is accurate the spikey is no good.

[gogugogu]

whats the MPG ?

[6969DUCCIO6969]

Mine goes to 12 real quick, then back down to 5-6 then works its way back up to 12ish...is mine fucked too?

[nofuknidea]

Maybe Leaking BoosT?

[70mmRX7]

Your secondary turbo may not be at full spool upon opening the flapper. The 2nd turbo is spun prior to use, but the pressure created is held in, until 4500rpm. Check the exhaust flapper valve beween the turbos on the exhaust manifold for looseness. Stock pattern is 10-8-10. Basically the 2nd turbo is going too slow when the system releases the built up pressure.

[BeemerKyle]

boost spike for sure probly running a fmic and a down pipe with no boost controller or his gauge is a piece

[savasianz]

i have the same problem, any idea what it could be?

[twirliegirl28]

I have a 1995 FD3S stock twin turbo, mine boosts about 8, then immediately 14 when the second turbo spools. My second turbo kicks in around 4,200 RPM at wide open throttle. Right now im having some troubly, im only boosting exactly 5psi, it wont go any higher....suggestions??

[HHHeeeyy]

yes, go non-seq

[SpideyFan6010]

I agree. Twin Turbos can yield better results but all those vacuum lines just get in the way and make freeing horsepower seem like pulling teeth. Single turbo is the best way to get more power with less complications

[84gsl]

hmm, im thinking massive boost leak a or problem with the boost controller opening or leaving open the wastegate. I have a first gen, so i dont know much about the third gen setup, but i do recall their computers did have some issues.

[billmfd3]

stock boost is 10-8-10 either your gauge is off, its not stock or there is a problem

[itbegan01102004]

boost spike!!!no good

[tomtom209]

So hits 15psi then backs off to 11psi! Wow 4psi lost in what stage of tune?

[Zomgdevil]

no it hits 11ish drops down to 9ish then hits about 13ish

[jdmfreak1992]

how can you tell he is running lean

[AnimeMaster2]

because if he is tuned for lets say 12 psi and you go past that your not getting enough fuel to the engine, hence running lean.. unless the tuner compisated for it and tuned it that way

[AnimeMaster2]

can you say running lean? if you dont have the proper mods and boosting that high, say bye bye engine

[TooManySnakes]

Are you "ass-u-meing" he's running lean because of big boost?