Anyone know of deffo, 100%, limits on certain items?
Or even how on earth to work out if there is a way without just trying?
Maybe a thread with a list might be a good idea...

Is there a certain limit on power thru a certain bore pipework?
Does boost pressure have an effect, or purely flow/backpressure?

What about dumpvalves, say the usual on most people use, the "GrpA" one, when does that stop being innefective that dumping enough air to not cause turbo stall severe enough to fuck a turbo?

Im using 75mm pipework from turbo to throttle (75mm too) and i dunno what exactly power thats good for, just pretty sure itl be enough, lol.

Same with dump valve n and cone filter, didnt think one will do so i got 2 of each Cossie "GrpA" jobs.

Anyone know any facts for certain parts, scientific or just tested on a car?

A big PF list im sure would be dead helpful to people...