load / boost question I cant answer

[USOPHUNKE]

changed to a lightened flywheel and is getting lower boost pressure but is as i thought would happen hitting full booost at a lower rpm...why is this...I was thinking a boost leak...but does load have a direct effect on how much pressure a turbo air a turbo will put out....i think not but dont wanna give bad info..





he does spool up faster, its actually kinda wild how much faster, but the max boost is in fact less.

another question i have is that boost pressure is somewhat related to load on the vehicle, right? I really noticed this most when i had the t3 super-60 on the corrado. when in neutral, if i stomped on it... it would barely boost AT ALL all the way to redline. however, all the way up through 5th, the car would see around 12psi above 3500rpm. i would attribute the boost "problem" that brandin is having to the fact that the lighter flywheel is less load, however the load on the whole system (flywheel, tranny, wheels, and car) is still the same (or marginally lower).

taking all of that into account.... i don't understand how a car can make any boost on a traditional dyno. a mustang dyno adds loas, but a standard dyno fails to do that.

if im completely wrong about all this... just say "no"

[turbosnow]

Load over time should have an effect, thus why you often do not reach full boost in 1st gear. If the engine is revving up faster due to the flywheel the turbo would spool faster in each gear but it may not have enough time to hit full boost in lower gears. In the upper gears this should nto be a factor. In neutral when you rev the engine you are not pushing enough exahust gas to spool the trubo there are "stutter boxes" that modify timing and fual curves to allow you to build boost when revving in neutral . All dynos put load on the driven wheels IIRC.

[USOPHUNKE]

thanks