Hi Paul
I finish to renovate my new house and ready to go back on my project.
I will stay with p port intake and install turbo but i want to built my
own drive with ford diezel trans 5R110W planet gear system.
the gear system is bigger then the E40D WITH RATIO OF 2.48.-6 pinion
planet system Drum size 5"+
I look on the Slauson catalogue but i found a better price on EBAY

I intend to cruise at 6200 rpm approx and i would like to know the HP at
this rpm for rx-8 pport and turbo.
i will also appreciate your comments


Jean Prudhomme

I think that gear set is overkill and too heavy.
Several people have used the A4OD set with three rotors.
One with a turbo 3 rotor. The ratio is not as good
as it is only 2.48 rather than 2.85.

Send me a dwg of the rest of the gear box.

The HP you get will depend on the boost. The fuel
burn will determine that at cruise. Figure a half pound
of fuel burned for every HP you choose. Fuel weighs
about 6.25 pounds per gallon.

P-port 2 rotors have been easily boosted to 400 HP
or more. Obviously you don't want to burn that much
fuel at cruise.

Paul Lamar

6200 rpm and 13B-MSP 4-port NA ... 140-150 hp? According to dyno curves.

The trouble with 350+ hp and E4OD planet is, that we - still - don't
really know how _long_ it will last.

There's three points to look:

- How much surface pressure on tooths
- How much bending force for tooth
And most important:
- How much force and speed on roller bearings inside planets.

I try to do this "homework" - sometime soon...

If it seems that on eg. 400-500 hp cruise it lasts 150 hours, there is
still a couple of tricks to use:

- Proper gear oils, separated circuit with pump and cooler.
- Surface-treating the planet gear and bearings. Difficult to do
afterwards, but after-treatment compounds (like RVS) could help.

Could be still cheaper than custom gearset. But how much...

Cheers,
Petri

I don't think anybody is going to run it at 350 HP continuous.
175 pounds an hour is 28 gallons an hour.

Paul Lamar