I know a lot of you all simply cant leave stuff alone (like me).
What sort of boost levels are you running and with what supporting mods?
If you dont want to release your secrets, that is cool too - I appreciate any info.
I just wanna know what are the safe levels of boost to run on stock turbo+internals, but aftermarket ECU+breathing mods.
thanks guys
Just thought I'd throw something out here (mods not withstanding)....but I'm sure you'd know this already.
I know it does not answer your questions directly, but I hope it will provide some help anyways
Power = air flow, not boost pressure.
The thing about choosing your boost level is that it's not just dependent on mods you have, and what the tuner says, but what the turbo is actually capable of.
At higher boost levels, you can actually lose compressor efficiency, or at a minimum, have a lot of heat transfer across the compressor itself (yeah....we had to look at compressor curves back in mih class days).
So, sure, a WRX turbo can run as high as 21 psi theoretically, but you'd probably make less hp than at say...16 psi, as the efficiency has dropped off, the flow might have tapered a bit (according to the compressor map, by about 15 or so cfm), both of which will limit your hp.
So in short, for a WRX stocker turbo at that level, it's really nothing more than a fancy heater thats gonna probably live a shorter life (maybe...maybe not).
IMHO, short of asking your tuner for advice and going on a dyno and experiementing yourself with different boost levels, take the time to look at some compressor maps.....it can only help you make a better decision as to what level of boost to run, and how to squeeze the best out of your setup.
Most times (but not all!!!), the stock boost level gives a good compromise between air flow and efficiency...so that's something to think about.
There should be a few compressor maps/curves floating around on TSOC (
is the LGT turbo a VF37??? i can't recall), and if not, nasioc or other legacy owners forums might have a couple. Check
16 cycles also...he can better explain this than I can, and should be able to help find a com,p. curve as well.
If the compressor maps/curves aren't available, then, you'd have to rely on the tuner's advice,
and in most cases, this probably is the best option anyways.
My 2c.
