Quote:
Originally Posted by axsaxoman
If you waste actuator is 8psi --then that is the boost you will get if you have no other control system -- but be ware unless you have an actuator with pressure take offs on both sides of the diaphragm --then no matter what controller you use you will never be able to have less than its value once you get to its spooling up RPM
you want proper control across a bigger boost range --then you need more complex actuator and boost controller
actuator spring value is lowest boost you can control down to
which is why up todate OEM turbo,s use a waste gate that is naturally open --not shut and can then control boost properly ,which is why modern turbo,s you don,t have big lag and the units are small so they spin up even at low engine rpm and can give boost from 1000rpm under total ECU control
bottom line is you don,t need a turbo the size of a dustbin on a 1.6 engine to get good boost --al that does is mean its high up engine rpm before it is fully spooled up because of the volume of EX gas needed to drive it .also large turbines respond slower both to speed increase +decrease
you have to remember that the reason people picked the gt 28 unit years ago was it was cheap + looked "cool"
take a look, at modern turbo
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I think, although not confirmed, but I'm claiming it.....a world first.
I'll be the first to run a GT22 (variant) on the J4. Maybe go as far to say on the JP4 as well.
I'd like a certificate from an official body, but there isn't one. So if you could mock me one up John...
The disco potato is too late in the range for my liking. Youtube confirms it, like you say and the GT25 wasn't attainable when I was searching, the 2259 fits the bill, I hope. Lets see.