snips..

IO = Intake opens
IC = Intake closes
EO = Exhaust opens
EC = Exhaust closes

US Model First Generation RX-7

IO 32° ATDC
IC 40° ABDC
EO 75° BBDC
EC 38° ATDC

European Model Model First Generation RX-7

IO 32° ATDC
IC 50° ABDC
EO 75° BBDC
EC 48° ATDC

First and Second Generation 6-Port 13B

Primary intake (Part throttle/cruise)
IO 32° ATDC
IC 40° ABDC
Secondary intake (Part to full throttle)
IO 32° ATDC
IC 30° ABDC
Auxiliary high speed ports (Full throttle above approximately 4000
rpm)
IO 45° ATDC
IC 70° ABDC
EO 71° BBDC
EC 48° ATDC

Second and Third Generation Turbo 13B

IO 32° ATDC
IC 50° ABDC
EO 71° BBDC
EC 48° ATDC

Racing Beat "Street Port"

IO 25° ATDC
IC 60° ABDC
EO 84° BBDC
EC 48° ATDC

Racing Beat "J-Bridge Port"

IO 115° BTDC
IC 72° ABDC
EO 88° BBDC
EC 57° ATDC

Mazda Factory Peripheral Port

IO 86° BTDC
IC 75° ABDC
EO 73° BBDC
EC 65° ATDC

We are missing the timing for the Racing Beat Turbo PP?  They make

two

diffent PP housings...

Hans

Looking at the pictures, I am surprised that the ports are horizontal
instead of perpendicular to the housing.       jerry

That is more closely aligned with the actual air flow.

Paul

John Gibbons wrote:

Okay, am I just dim or what ?  These measures are quite precise ( 1
degree ), so when you have your rotor housing on the bench, how do find TDC
within 1 degree ? When you answer I'm sure I'll say yeah, duh.

Check Paul Yaw's web site. He has some pictures on there on how to
do it within one degree. He uses a degree wheel on the nose of the
e-shaft.  http://personal.riverusers.com/~yawpower/

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site. Copyright 1998-2002 All world wide rights reserved.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org