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Registered User
Joined: Dec 2002
Posts: 162
From: Reston VA (not dead, just reston)
Car Info: '02 WRX TurboXS Stage 4
First off this question has been asked and answered hundreds of times on i-club. Try searching next time. That said I will tell you that with just a boost controller you should set it to no more than 16.5psi because the ecu will retard the timming shortly after that. I think the actual number that timming retardation starts is 16.8psi. I have mine set at 16.3psi.
Registered User
Joined: Dec 2002
Posts: 101
From: MA
Car Info: 2002 WRX/STI 2.5 liter VF22
Originally posted by Andersonwrx
First off this question has been asked and answered hundreds of times on i-club. Try searching next time. That said I will tell you that with just a boost controller you should set it to no more than 16.5psi because the ecu will retard the timming shortly after that. I think the actual number that timming retardation starts is 16.8psi. I have mine set at 16.3psi.
First off this question has been asked and answered hundreds of times on i-club. Try searching next time. That said I will tell you that with just a boost controller you should set it to no more than 16.5psi because the ecu will retard the timming shortly after that. I think the actual number that timming retardation starts is 16.8psi. I have mine set at 16.3psi.
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Joined: Nov 2002
Posts: 3,639
From: Longing for my ol' white '02 WRX :(
Car Info: 2016 Acura RDX ... meh. Um, nice subwoofer?
My advice is to do what I do 
I have a semi-conservative gain set on my EBC with a limit of 108 kPa. My intention is 110 kPa (aka 16.0 PSI) but it can over shoot often, so I set it to 108.
Historically when I've set the boost too high or set the gain too high the timing will retard. (Not to mention boost cut off consistently kneeing me in the grown at 1.23 kPa, 17.8 PSI). So 110 kPa or so saves me all this heartache.
For more scientific data, the compressor maps for the TD04L with a turbine design similar to ours shows boost being worthless not long after 16.0 PSI. This, of course, doesn't count the addition of some sort of charge cooling beyond the stock intercooler, etc. So, beyond what's just safe for your engine, you also preserve the life of your turbo if you keep it from boosting beyond efficiency. There's not need to heat soak it so badly and no need to have it spin so furiously for so long with so much pressure when it really won't do anything for you.
Hope this helps...
jason
p.s. K2Skier - you're a helpful guy
I have a semi-conservative gain set on my EBC with a limit of 108 kPa. My intention is 110 kPa (aka 16.0 PSI) but it can over shoot often, so I set it to 108. Historically when I've set the boost too high or set the gain too high the timing will retard. (Not to mention boost cut off consistently kneeing me in the grown at 1.23 kPa, 17.8 PSI). So 110 kPa or so saves me all this heartache.
For more scientific data, the compressor maps for the TD04L with a turbine design similar to ours shows boost being worthless not long after 16.0 PSI. This, of course, doesn't count the addition of some sort of charge cooling beyond the stock intercooler, etc. So, beyond what's just safe for your engine, you also preserve the life of your turbo if you keep it from boosting beyond efficiency. There's not need to heat soak it so badly and no need to have it spin so furiously for so long with so much pressure when it really won't do anything for you.
Hope this helps...
jason
p.s. K2Skier - you're a helpful guy
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