top end set

[Rawze]

(07-22-2018 )Unilevers Wrote:  isx valves tighten, anyone who works on them would know this. As for the 45 punds booost, people are so stuck on this dam boost number. its about flow and physical amount of air through the engine. If i had 2 turbos that put 80lbs of air a minute through a engine, one did it at 50 psi and one did it at 25 psi the 50 psi turbo would blow the engine up and the 25 psi turbo would be awsome. yet everywhere you would go everyone would tell you your boost is too low. ITS ABOUT FUCKING FLOW, NOT BOOST PRESSURE WORLD GET YOUR shi#t STRAIGHT.

sry bout my rant just had to many dumb conversations lately about boost.

Very well said. I think a lot of people also don't realize that it can take as much as 10% less boost pressure on some engines to make the same power/torque when an engine has been de-mandated. This is due to more oxygen getting into the cylinders. Combine that with a higher AR ratio because there is now no flow being bypassed between the exhaust to the intake(egr blocked), and things can sometimes need to be lowered by quite a bit.

The recommendations that I myself make on this forum about boost pressure are based on factory Holset VG turbochargers, lots and lots of testing, and seeing literally hundreds of failed engines by bad programming that has been done by the so-called "experts" off those various auto tuning forums, social media sites, and the hundreds of various butcher shops doing sich things across the country. I have seen my share of damaged engines because of stupid people out there doing stupid things and giving bad advice. Most of these "experts" simply don't understand how these engine actually even work.