Recently purchased 13b turbo, would prefer normaly aspirated
  13b.
  Anyone interested in trade? Located in Howell MI, or
trade
  turbo and associated parts and rotors. Made decision that
  my needs don't require turbo after all.
  C. Smith

  What year turbo engine Craig?

  Paul Lamar



Paul, I have yet to take the photo of turbo, for you to
date
the engine. Classes ended yesterday, so I'll try to get
the
photo today after work. Engine is still on the pallet in
the back of my truck.
C. Smith

If it is just one turbo it is somewhere between 1988 and
1992.
It makes a large difference. If it is 1990 to 1992 is
better
as the first ones 88 to 90 cracked a lot.

If it has two turbos it is highly valued 3rd gen RX7 engine
that
has a much more robust construction over all. Designed for
up
to 280 HP.

Paul Lamar


Paul here are some pictures. Please tell me what I have.
If you need a different shot please describe it. I'll
try again.
C. Smith

Hmmm hard to say. Those pics are badly out of focus. If
they were
done under florescent lighting that might be the problem.
Use an incandescent bulb and take the pictures over
again. Either that or use manual focus if your camera has
that
option. Also remove the heat shield from around the turbo
for a better look.

My wild ass guess is it is a 90 to 92.
Some people might be able to tell from the intercooler
but not me :)

Paul Lamar

My apologies about the quality, I was in a rush to get them out, and
didn't look at the final result before sending them. It's cramped in
the back of the truck, tiny screen on camera, and had glasses on that
focus too far out combined to give a bad result.
Will have to wait until I can borrow a friends lift to get the engine
out of the truck.
Is it reasonable to just replace the rotors with NA rotors? Are there
any other differences in the rotors(other than compression ratio),
turbo/non-turbo, and or year to year?
C. Smith


Yes it is possible. 13B 9.7 compression ratio rotors are expensive and hard
to find. With a p-port I think cheaper RX8 10:1 rotors would work.
It will have to be balanced.
For an aircraft I would not mess with side ports. Too hard to get
porting and manifold to work for as little as 200 HP at 7500 RPM.
About 250 HP is possible at sea level with a p-port at 7500 RPM.
You don't need to use all the power at sea level but up
at 12K you will need it.

Paul Lamar