What is T13B?

I have been a lover of the 13B rotary power
since my first Mazda RX4 back in 1979.

My project is one that may interest you!

I Autocross a modified sports car powered by
a 13B (naturally) fitted with a Holley 670 projection TBI
and an Airesearch turbo from an '84 T-bird!

Dial it up from 200 to 350 hp all under 7000rpm!!!
The engine block is highly modified is most every way possible from the half-bridgeported half-street ported intake, to the wide open exhaust ports.
All of the cooling passages have been ribbed for enhanced cooling.
Carbon apex seals (thank heavens for these) make the engine far more
durable and promote less wear on the side housings. Long tooth stationary
gears allow a few more revs near 8500 rpm but the porting design and the
fuel/air delivery make this kind of rpm unnecessary, resulting in a nearly bullet-
proof engine that produces a huge boost to the seat of your pants from 2500-7000
rpm. Boy does it run smoothly, and never misses a beat.

This started out as an E-modified SCCA class machine. Not ever having
the opportunity to see just what one was, I was forced to design the car
from a set of rules that took up two pages in the SCCA rulebook.
It was even my first shot at welding!! I was a virgin all the way!

Not very much to go by. It turns out that the car is illegal for E-mod
since the tube chassis requires it to follow GT guidlines as well. The
problem? Well the motor is shoved too far back! by about 12 inches.

Oh well, its still loads of fun. The car is specifically designed for
autocrossing. Extremely tight courses are sometimes difficult since the
steering box is a standard ratio (2.5 turns lock to lock) instead of a
quick one like you would find on a formula Ford ( 1 turn lock to lock).
A more open course like a road course or airport taxiway is more
suitable to the horsepower. With the tires only 20 inches tall the car
has a top speed of about 100 mph.

The tranny is a stock RX4 4-speed tied to a 3.9 differential solid axle
from the RX4 as well. The the front suspension is a combination of a 1972
Ford pinto and a 1978 mustang II rack. It uses torsion bars from a 1974
datsun pickup instead of coil springs. The rear axle is suspended by a
four-link trailing settup with a panhard bar. Coil springs from the
back of a little Honda civic hold the chassis up.

The body is a Plywood fiberglass composite using epoxy for bonding.
It was scaled from a 1/25 scale model of a 1980 RX7. The modified model
is sitting by the pylons in the title bar of my page. The body is about
15/16 scale as near as I could get is from such a little model. I
didn't own a real one at the time to copy.

I have said these things times. E-mail me if you are interested!