Engine is a 89 turbo II with no significant porting.  The turbo

rotors were

replaced with 89 - 91 normally aspirated rotors (9.7 - 1 CR) for

better BSFC

in non-turbo service.  The oil pump is also a non turbo unit (for

better

fuel economy, every bit helps).  EC2 engine management system and

RD-1A

redrive are used.

"Kevin R. Walsh" wrote:

This may have been covered before, but what is the advantage to using
the turbo core if you are going to install the NA rotors?  I'm only
asking because the time for me to start buying parts is coming soon,
and I thought I'd double check.

Also, if I decide to use a Peripheral port (which I think I will), I'll
be replacing the rotor housings anyway, so what would be the best core
to use then.  I'm aware of the year differences, so that much (at
least) is clear....

Kevin

Some think the NA four port breathes better than a modified six port. I don't agree.
After all the new RX8 engine will be a NA six port and it is getting
280 to 290 HP at 9000 RPM. That takes breathing.

I am trying to get someone to try grinding out the partition between
the two ports on the six port end housing. (Mine is a turbo engine
so I can just up the boost.)

The 93 and later turbo engines have stronger end housings as I understand it.

Paul Lamar
 
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