Jakespud Posted July 30, 2013 Share Posted July 30, 2013 I had recently done an INVIDIA turboback exhaust and used the cobb tuner accessport "stage 2" map. The map requires at least a highflow cat downpipe and 93/94 octane. I used the boost gauge in the tuner and one of the readings came out kinda high in my opinion. 21psi and the map was set for (i think) 17 psi... Is 21 psi a bit to high for the stock motor? Link to comment Share on other sites More sharing options...
PtPixel Posted July 30, 2013 Share Posted July 30, 2013 Yeah that seems well high to me, if it's stock turbo then that's outside of its efficiency too. Might pay to get an e-tune, the AP maps are nowhere near as good, too generic. Link to comment Share on other sites More sharing options...
rob-2 Posted July 30, 2013 Share Posted July 30, 2013 The stage 2 tune is for 4500 feet, if you're lower you can easily over boost with denser air. Link to comment Share on other sites More sharing options...
prodrifterx Posted July 30, 2013 Share Posted July 30, 2013 ive yet to overboost at sealevel/bay level. im catless in up/dp, spt intake and cobbstg2mt93v300 tune. (file is something along those lines) is the cobb ap and files up to date? Link to comment Share on other sites More sharing options...
rob-2 Posted July 30, 2013 Share Posted July 30, 2013 ive yet to overboost at sealevel/bay level. im catless in up/dp, spt intake and cobbstg2mt93v300 tune. (file is something along those lines) is the cobb ap and files up to date? I did on the weekend Link to comment Share on other sites More sharing options...
Jakespud Posted July 30, 2013 Author Share Posted July 30, 2013 ive yet to overboost at sealevel/bay level. im catless in up/dp, spt intake and cobbstg2mt93v300 tune. (file is something along those lines) is the cobb ap and files up to date? i used the tune you mentioned but i have a highflow catted downpipe. and i connect my AP to my computer weekly to check for updates and look around to see if someone tuned there car with the same installs I have. Link to comment Share on other sites More sharing options...
prodrifterx Posted July 31, 2013 Share Posted July 31, 2013 honestly beats me. could very be a tune issu. but imo a catted pipe vs a catless pipe (hp/power etc aside) would give more backpressure than a catless pipe, and thus less likely to spike i would think, granted downpipe being open bellmouth or like oe or divorced etc may play a significant role i would say. any chance a bad wg or bcs? Link to comment Share on other sites More sharing options...
fysics Posted November 15, 2013 Share Posted November 15, 2013 not to necro this but I'm seeing the same thing after going stage 2 OTS tune (Cobb) post installing my Invidia catless dp. reference is here: https://static.cobbtuning.com/cobbtuningweb/site/maps/subaru/map_notes/SUBA_US_LGT_07-09.pdf for my Spec B the the boost target is 16.7psi +/- 0.8psi on 93 octane (if I read that right), and on your 5EAT it's 17.0psi +/- 0.8 psi. there is a lower wastegate duty cycle version with each map, something to try if you are overboosting, and I'm thinking about loading that. I'm seeing boost at 18.3psi. Link to comment Share on other sites More sharing options...
Nrw Posted November 15, 2013 Share Posted November 15, 2013 Was just going to say, hop on Cobb's site find the low wastegaste duty cycle version of the stage2 map flash that. Link to comment Share on other sites More sharing options...
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