Gday all maybe been posted before but anyways what is the max boost (psi) the stock turbos can handle safely with stock internals stock intercoolers someone said 16 psi to me, is that safe? cheers in advance
They will do 16, 12 is a much safer level. Above that you looking at better intercoolers, turbos, etc.
if you get larger injectors and 3" dumps the guys in the US have squeezed 20 plus out of stock manual turbos
Max boost and safely don't really go in the same sentence. As boost goes up, life expectancy goes down. As WazTTed said guys in the US have run 24psi+ with 450whp+ through stock turbos but the life expectancy is low. 15psi seems to be a decent trade off between power and not worrying about the turbo's going bust too quickly, but it also depends on other mods. Cheers
Completely agree, 15 to 16 is what i think is the realistic max. I mucked around with mine up to 18 on the stock turbo's but theres no real point, the power gains inthose upperboost levels dont make it worth while. For a while i had a MBC that would overboost to 18 on acceleration and then hold 16. that was a quick set up
just a general question fot turbo's and boosting that can slightly fall into this topic. when upping the boost, the main saftey problems would first be as people said intercoolers, turbo's, then internals. so (im new to turbo's) im guessing that an intercooler would split when it has to much boost throught it. but im stuffed as why it would kill the turbo, i thought that it would just run out of breath and not be able to do the boost level
intercooler are usually tested to 100psi, so you'll never really bust one. The higher sppeds and temps that the turbo's operate at when the boost is increased is what reduces turbo life
thanks for clearing that up.so i suppose that its more practical to upgrade the intercoolers before then because they get so hot??
yeah its a good idea to upgrade them then, but only if you intend to increase the boost, larger coolers on stock or just off stock boost levels is a waste of time. I did a post a while ago outlining how much power i made on my TT with minimal mods, it made as high as 320rwhp, with just 15.5psi and a 3in catback exhaust, retuned stock computer. later down the track i made a intercooler water spray system out of the rear washer set up which did show an improvement on the arse dyno. but the point i was getting across is that most of the stock gear can see you to 230rwkw, which is what most people chase for the street. My recommendation is a quality cat back exhaust and a good tune, spend as much as u can on these items, boost it up and dont do anything else
