I’ve watched a few videos of different guys trying to explain this. What I discovered, that I don’t think a lot of people hear from the videos, is that being in your efficiency island, is also dependant on the RPM of the engine. A prime example of this, is my truck, with the old turbo, and all the flow mods I did (intercooler, intercooler piping, exhaust, and steed speed manifold) I would get compressor surge in the middle of the RPM range, at about 10-13 psi, while excellerating. The turbo did not do this before I did all the intercooler piping and intercooler. I increased the flow enough, that the turbo couldn’t keep up, and it would surge in that particular rpm range, with that amount of PSI. As soon as I got out of that spot, it would return to its efficiency island and build to 23psi boost, because the engine had enough rpm to deal with the flow the turbo could provide. There’s a relationship between the strength of a turbo and what the engine can take. Sometimes the engine can take more but the turbo compressor can’t handle it. I replaced the turbo with one that had the same size turbine wheel but smaller housing, and a 2mm bigger compressor wheel, and a better flowing compressor, and the surge went away entirely. I find this stuff so fascinating! Thanks for the Video
Boost has nothing to do with calories. You just needed to say that boost is actually a measure of restriction. Your turbo flowing into a garage will be 0psi, your turbo flowing into a 2L bottle of sofa will be much higher in restriction.
And then there is the issue of not every setup as far as this was done or that was done to the fuel pump, the head('s) the rest of the exhaust, no 2 setups are indentical. You can get a ball park range. You choose and use what someone says gave them a specific result and put that together on your setup and what the heck, I'm not getting the numbers you said I would get, or on the other hand, your setup surpassed those numbers and you feel great. Desktop dyno and spread sheet engine building ! LOL.
What turbo would you recommend cat c15 bxs accert 18:1 compression ratio converted into single turbo 550hp tune 6nz engine wiring harness & file tune as well.
I have a question, I have a 2014 f150 3.5 ecoboost, one of the turbos seems t9 be releasing the boost pressure before i let off of the gas, what could be causing this issue? Someone, anyone? Pl3ase helps
How much PSI is necessary to make 80 lb•ft more torque on a 4.0 Liter V8 that produces 320 lb•ft of torque. 320 lb•ft NA engine + 80 lb•ft boost = 400 lb•ft. Would 3.63 PSI be enough? 80.0204082 lb•ft = (320 lb•ft X 3.63/14.7 + 1)
