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Power Strokes
7.3 Aftermarket
Discussion regarding back pressure and boost pressure
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[QUOTE="euroford, post: 1413290, member: 17667"] I've been monitoring my backpressure (after fixing the sensor!) and am kind of curious about discussing its relationship with boost pressure and how that may be impacting the performance on my truck, and maybe coming up with some ideas to optimize it. First off... truck is running great, it just leaves me curious if i'm leaving some performance on the table and really just want a better understanding of the finer points on this thing. I'm running Swamps 200/30 injectors and some other mods along with a stock platform turbo; rebuilt last year with a 360 deg. thrust bearing kit, WW2, 1.0 A/R housing and EBPV ****** along with a disconnected and fully cranked down banks wastegate actuator. obviously i am leaving some performance on the table with that turbo, i'll be doing a 354.5SXE eventually, probably in the spring, but right now, the stoker is what i'm running. running around in my hot street tune i typically see about 23psi max boost, along with that i can see about 39psi of backpressure. In my race tune i can see a touch over 30psi, not sure about backpressure. Basically, that sounds like a lot of backpressure for how much boost i'm making, i'm curious to understand why and to get your thoughts on if i should be seeing more. I was seeing a bit less boost, but i replaced all of my boots and clamps and this helped wake it up a bit more, i also picked up a PSI or two by cleaning my air filter (AFE). any thoughts from you guys? Maybe still have some boost leaks somewhere? Maybe the AFE filter is restrictive? Maybe this is just a factor of being here in CO and doing all over my driving at 5000+ feet? maybe i'm beating the crap out of my turbo and its time to rebuild it again? maybe the stock turbo just can't flow well at that point. I know most guys around here are running much hotter setups, but this has proven to be a very nice street setup. i'm also just a tinkerer so i'm always looking for the little ideas to help optimize it. its also just fun to banter about it here on the forums. [/QUOTE]
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Discussion regarding back pressure and boost pressure
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