pros and cons for 20b or v8

[RyanT]

Ha ha I won\'t worry then.

[re japi]

How heavy 20B is anyways? And that v8? My Beemers v12 is 240kg(aluminium), old v8´s are like +350kg....

[bimbleuk]

How heavy 20B is anyways? And that v8? My Beemers v12 is 240kg(aluminium), old v8´s are like +350kg....

If I remember correctly they are just over 210 kgs with ancilliaries and cast iron manifolds (no one reuses them as they are restrictive and don\'t fit the FD). The T56 gearbox adds quite a bit at 60+ kgs.

[bimbleuk]

wrong comparison mate:rolleyes:. If you see the firewall modification of both cars, you would see that the firewall of the V8 fd has been modified whereas, the firewall of the 13b fd is in a stock position. So No COMPARISON I am afraid
 
Cheers:WaveBye

That\'s the same car before and after the conversion. The firewall is not modified. The lip is cut back so I can remove the plenum without the hassle of removing the map sensor at the back. Not everyone bothers to do that mod.

[BlitzBoy]

Pah you dont even need a 20B to beat a V8 racing car, a little old 12A turbo will do the job!!!

case in point LOL :p

http://www.youtube.com/watch?v=yXjzLaVvhjU

[4packet]

Trying to compare the weight of different engines is difficult. How much of the drivetrain are you including in each figure: manifolds, ancillaries (with or without AC), turbos, intercooler, oil coolers, wiring, plumbing etc. There is very little between a 13b on twins and the V8. As Bimbleuk has mentioned, the major increases in weight is the gearbox which is mounted low and central. This is why the balance is not affected much with the conversion. BTW the Tremec T56 has been mounted to some FD\'s running big rotary power. A typical V8 FD gains about 60kg with a very small shift in weight to the front wheels. This is based on real builds with corner weights pre and post.
 
As an engineer I think the rotary engine is a great piece of engineering and a triumph for Mazda to have developed it as far as they have. I\'ve visited the Mazda museum at the Hiroshima plant, studied it\'s history and been in awe of the 26B in the 787B. It does have it\'s inherent issues so it\'s the emotional choice and proabably why people are so passionate about it. I understand why the rotary is defended on the forums. It\'s just a shame that these topics don\'t stick to the facts and properly discuss the engineering merits of both Rotary and V8.

[600gaz]

I\'ve got a bare 13B engine so i\'ll weigh it tomorrow for you . It seems very small and light and i\'ll guess it\'s about 80 kilos .

[Bobbit]

fduk me dude I need to take you out in mine, then you know what brutal acceleration is lol

I was hoping someone would offer me a ride :yes :Thumbsup!