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It well might be. Taking that flow chart and trying to back engineer the
engine operating parameters here is what I get
ratio
Boost psi
lbm
CFM
RPM
1.5
7.35
10
87.7193
1894.736842
1.7
10.29
20
175.4386
3789.473684
1.8
11.76
26
228.0702
4926.315789
as possible operating parameters for the RX-7 engine (single turbo pre 1993
Rx-7). We know throught SAE papers that the Mazda engineers tailored the
post 1987 turbos to boost performance at the lower rpms. So this might well
be a close match to the compressor map for the Ht 18. Do these boost rpm
parameters look close to any of your turbo Rx-7 drivers with models between
1987 and 1993???? Looks like you would get lots of boost at fairly low
rpms with this turbo on a rotary.
Ed Anderson
A discussion of john's turbo failure, along with pictures, is occurring at
http://canardaviationforum.dmt.net/showthread.php?t=5
I thought to mention to this group that I have been told the Hitachi ht-18
(john's)turbo is very close to a garret t3 50 trim.
Can any one verify or rebut this?
I include a copy of the compressor map for your edification.
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