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Message
The wastegate on my 89 (S5) RX-7's turbo cracks right around 5.5
PSI.
The higher (than S4, being 86-88) boost is attained with an
ECU
controlled solenoid which bleeds pressure from the signal line
between
the compressor and the wastegate actuator.
Hi
Matt,
You could be
right. Mazda certainly could have used the same actuator pressure on the
S4 and S5, but since they don't list the part numbers for the actuator, I can't
tell. I was just hoping that maybe the earlier version was a slightly
lower spring pressure. I figure the easiest way to tell for sure will be
to get one of each and test them.
Porting the wastegate
will be the big question now. I've read a bunch of RX-7 forum messages
about this. Some folks go so far as to make the ports larger than the
flapper that covers them. Until I really get one apart to examine it, I
won't know quite what I'll try.
Thanks,
Rusty
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