How long or what should the max psi on a vf39 in an STi be, i believe then run stock around 15? so im guessing like around 20 would be safe? thanks
I'd start turning up the boost and watch your injector duty cycles.. Make sure it doesn't go over 85% if you want reliability.
Have you ever seen a WRX's IDCs?? Seriously.. every stage 2 car I have ever seen is static up top. STi's are even worse. I bet it goes higher than 85% stock. stage 1 log: Code: 4480 +17.5 4.2 102 90 00 +15.3 83.2 +17.4 +2.9 337.00 4.3 4604 +17.1 4.2 101 90 00 +15.7 84.6 +17.6 +2.7 337.00 4.4 4649 +17.5 4.3 102 100 00 +15.9 89.2 +17.4 +2.7 337.00 4.4 4830 +17.9 4.3 100 100 00 +16.2 92.1 +17.5 +2.1 337.00 4.3 4938 +17.9 4.3 102 100 00 +16.3 87.1 +17.5 +0.7 337.00 4.3 4975 +18.6 4.3 101 90 00 +16.6 91.8 +19.0 -0.1 312.00 4.3 5175 +17.7 4.3 101 90 00 +14.9 87.0 +19.5 -0.1 312.00 4.3 5208 +16.7 4.3 102 80 00 +15.4 90.9 +20.0 -0.2 312.00 4.3 5324 +16.7 4.3 102 80 00 +15.5 90.9 +20.2 +0.0 287.00 4.3 5428 +16.1 4.3 102 90 00 +16.0 88.1 +20.6 -0.1 287.00 4.3 5509 +15.5 4.3 102 80 00 +15.8 90.7 +21.0 +0.4 237.00 4.4 5509 +15.9 4.3 101 80 00 +16.1 91.4 +21.1 +0.4 237.00 4.3
How exactly are you turning it up? Do you have engine management or just a boost controller? Do you have logging capability to keep an eye on IDCs like Steve is cautioning?
well i dont have anything yet, but im just wondering, what tools should i purchacse for max protection/capability? right now im planning on some type of em, havent decided which one yet
Well, you might be able to go up 2-3 psi (might). You need to decide on your em first, and go from there. If you run the afr around 11-11.2 you will pick up a bit of headrom so you don't completely max out your injectors. If you plan on running a tbe you will definitly max out your injectors. Sti's are already runing almost at the limit stock. Russ
let me rephrase that.. Eww, I didn't realize they were that high. Almost makes me want to go buy an AccessPort and some injectors.
False, if you want to see IDC's you need to buy a street tuner. At which point there is no IDC "easy reading" like there is in the UTEC. The accessport requires you to convert injector pulse width into IDCs. It's not built in. The accessport was never designed for someone who wants to see whats "going on". Hell all it can actually do is read inaccurate live boost information. Or you pay another $400 for the street tuner in which case you are well over $200 the price of a used UTEC.
thats fine. But if you want to tune it yourself, I'm not entirely sure if the accesport is the way to go. If you always want to be logging and monitoring I still think the UTEC is the better option. Frankly, after using the streettuner and I'm sure Russ will tell you it's the same with the protuner, the logs generated by the UTEC are wayyy better than the accessport can. It takes forever to get info out of the accessport, you get like 10 lines of the same info because of the lack of bandwidth. If you want to set it and forget it, or have someone else tune it for you and never change it without paying that person again(because 1 pro tuner cant touch anothers maps) = accessport. You want to always be messing with things = UTEC. That was completely offtopic. For the thread starter: I would run 18psi and watch out for the creep.
