Originally Posted by SouthFloridaBoy7.3
I don't need to brag about anything? you are the one with the 40psi boost picture which would make you a brager indeed?.....I don't see why more boost is a bad thing isn't that why we all buy these performance parts. To make our trucks run better and longer? Seeing that you have more knowledge than me I wouldn't mind knowing what is safe range for my turbo to be set at since ive heard it can handle up to 35psi. The main problem I'm haven't is my truck starts to blow off very early now with my dp tuner and ocr and it seems pointless to be making all the boost if its just blowing off. I'm just here for answers and advice help would be appreciated!
The picture is of the gauge, of the Peak recall function and warning lights that the Isspro gauges offer. I top out at about 50-52psi...
Boost is a measure of restriction. Boost has nothing to do with HP. That’s what the performance parts are for, increased HP.
The stock turbo looses efficiency at about 25psi. After that the boost to back pressure ratio goes thru the roof. The aftermarket compressor wheels help, as does larger exhaust housings.
Ideally you want a 1 to 1 ratio, for every 1# of boost, you have 1# of back pressure.
For example, my 66cm H2e- at 40# boost I am at 40-44# back pressure. At 50psi I am at about 60-62psi back pressure.
At 30# on a stock turbo you will be at 40-45psi back pressure. The main issue with this is side loading on the center section, which over time causes the turbo to fail.
Your turbo is not blowing off pressure, your turbo is surging. You will NEVER hear the waste gate open on a 7.3 turbo. Never. Not even if you put your ear down there.
Your hearing surge, and to some extent stall.
Again, you’re not blowing off any boost, at least not that your hearing. The waste gate could be weak, but you would never notice it.
01 F-250 SC PSD,320k,16 Isspro Gauges, AFE-2,CCV Mod,IAH delete,map reg,Modded H2e, 6.0 IC, 230/100 from P.I.S, Studs, 910 springs, Forged rods, Water injection,Hydra chip-No Limit/Gearhead tuning, Swamps HVHF IDM, MBRP 4" dual's, Aero, 6" tip's, 4" Revtek lift, 37/12.5/16.5 MT's
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