Torque and HP for 20B
Senior Member
Joined: Dec 2002
Posts: 556
Likes: 1
From: singapore
Re: Torque and HP for 20B
Originally posted by inis
Who has HP and Torques specs for the 20B, is it really that much more powerful than the 13B?
Who has HP and Torques specs for the 20B, is it really that much more powerful than the 13B?
check out this webby
http://www.monito.com/wankel/cosmo20b.html
Senior Member
Joined: Jan 2003
Posts: 587
Likes: 2
From: Sydney, Australia
Here is a paragraph taken from my web site talking about the engine power. The way it "came-on" etc......
Mazda?s famous rotary engine has been steadily improving since their original L10 Cosmo from the 60?s. The Cosmo?s heart has been enlarged from the well known 2-rotor 13B to the 3-rotor 20B which shines as the ultimate example of a production rotary engine. It?s the worlds first series production engine employing a twin ?sequential? turbo system & has resulted in an amazing level of torque from it?s 1962 cc capacity. With over 390 nm available from as little as 2200 rpm, the 402 nm (300ft/Lb) peak at 3000 rpm drops by less than 10% at the 7000 rpm Redline. Mazda?s rated power of 206 kW is at the Japanese "gentlemens agreement" power limit, but it is well known that this is not actually the case. The real figure being around the 220 kW (300hp)mark. How does the twin turbo's work ? The primary turbocharger receives the full benefits of exhaust gas from all the rotors to spool faster, thus improving low speed torque & eliminating lag. The 2nd turbo starts to spin as the primary turbo dumps exhaust into it to regulate its own boost. At a pre-determined speed of 3500rpm the 2nd turbo comes ?on-line? to assist in maintaining flow & boost as the primary turbo struggles with the full load of exhaust gases. With both turbo's on-line, flow is maintained & the result is effortless performance combined with the rotaries natural smoothness & flexibility.
You can read the complete story at DMRH
Got a few good pics in there of the 20B engine too. Click on the "JC Cosmo" page once there.
REgards
Mazda?s famous rotary engine has been steadily improving since their original L10 Cosmo from the 60?s. The Cosmo?s heart has been enlarged from the well known 2-rotor 13B to the 3-rotor 20B which shines as the ultimate example of a production rotary engine. It?s the worlds first series production engine employing a twin ?sequential? turbo system & has resulted in an amazing level of torque from it?s 1962 cc capacity. With over 390 nm available from as little as 2200 rpm, the 402 nm (300ft/Lb) peak at 3000 rpm drops by less than 10% at the 7000 rpm Redline. Mazda?s rated power of 206 kW is at the Japanese "gentlemens agreement" power limit, but it is well known that this is not actually the case. The real figure being around the 220 kW (300hp)mark. How does the twin turbo's work ? The primary turbocharger receives the full benefits of exhaust gas from all the rotors to spool faster, thus improving low speed torque & eliminating lag. The 2nd turbo starts to spin as the primary turbo dumps exhaust into it to regulate its own boost. At a pre-determined speed of 3500rpm the 2nd turbo comes ?on-line? to assist in maintaining flow & boost as the primary turbo struggles with the full load of exhaust gases. With both turbo's on-line, flow is maintained & the result is effortless performance combined with the rotaries natural smoothness & flexibility.
You can read the complete story at DMRH
Got a few good pics in there of the 20B engine too. Click on the "JC Cosmo" page once there.
REgards
