browney

Hi,
Is it possible to use NA 13b rotors from a 2nd gen in a motor from a TII?

rotary emotions

possible it is, wether it's wise is something else...
You'd get higher compression, so you will have to pay extra attention to getting enough fuel in under boost. I believe you want to build a TII engine,but use NA rotors? Or do you want an NA, but use TII housings? The later would work fine, the first is a risk. Also make sure the balance is right. Try mazdatrix site to see the weight differences. As far as I know (but I guess others should either confirm or deny this, as I'm not too sure) you can use parts if they're from the same series (4 or 5). So you could use NA rotors in a TII engine, or vice versa. But they must be the same series. Otherway the balance would be gone, and the rotors would either be to heavy or to light for the E-shaft and flywheel rotation weight. But again: it's nothing I'm too sure off.

browney

I have a TII engine with TII rotors and am running it NA with a carbie. I wan't to use high compression rotors. Would this be an expensive/difficult swap to do?

Kill No Cone

iTrader: (6)

Browney, you would want to port it then too, because the TII ports are small.

browney

How much lower (psi) are the lower compression rotors?

SoRRoW

S4 ENGINES

Engine Specifications (Normally Aspirated) Engine Type: Twin Rotor 13B
Displacement: 1308cc/80ci
Compression Ratio: 9.4:1
Output(hp): 146bhp @ 6500 rpm
Torque: 138lb-ft @ 3500 rpm
Fuel Supply: Electronic Fuel Injection

Engine Specifications (TurboII Model) Engine Type: Twin Rotor 13B Turbocharged
Displacement: 1308cc/80ci
Compression Ratio: 8.5:1
Output(hp): 182bhp @ 6500 rpm
Torque: 183lb-ft @ 3500 rpm
Fuel Supply: Electronic Fuel Injection



S5 ENGINES
Engine Specifications (Normally Aspirated) Engine Type: Twin Rotor 13B
Displacement: 1308cc/80ci
Compression Ratio: 9.7:1
Output(hp): 160bhp @ 7000 rpm
Torque: 140lb-ft @ 4000 rpm
Fuel Supply: Electronic Fuel Injection

Engine Specifications (TurboII Model) Engine Type: Twin Rotor 13B Turbocharged
Displacement: 1308cc/80ci
Compression Ratio: 9.0:1
Output(hp): 200bhp @ 6500 rpm
Torque: 196lb-ft @ 3500 rpm
Fuel Supply: Electronic Fuel Injection

THESE ARE STOCK SPECS OF USA ENGINES..