I know that 400hp can be achieved going 3 rotor NA with PP etc but what sort of figures can be achieved staying with the twin rotor. I mean is say 300hp a possible target with the right porting/tuning.
I know NA tuning is a very expensive way to go fast and im not thinking of going this way but iam interested to know what the NA rotary capabilities are.
I\'d say you could get close to 300bhp with a big Bridge Port on an NA engine, definitely possible with a PP ported block. The power band, smooth though it is, will be moved up the rev range - so peak power will be when the engine is revving it\'s nuts off, but the sound is good ;)
http://www.youtube.com/watch?v=SrAjhimVaU0
Would be pretty boring though :Tongue1
I have built 13b PP\'s that make around 310hp at 8900 rpm.The feel of power is near to what twin turbo FD feels like at revs.
Regards
Carl
That sounds interesting Hayward.
What sort of price are we looking at?
Do you have any dyno sheets so I can view the power band of the 310hp engine?
Cheers
Quote from: CharlieP;700724Would be pretty boring though :Tongue1
A high revving NA is anything but boring! It\'s a joy to work an NA though high revs, and with a throttle response that it\'s nigh on impossible to come close to with a turbo!
The thought of a high 200\'s NA in an FD or better still, in an NA MX5, is hugely appealing!
So why have you got turbos then :p
Quote from: CharlieP;700746So why have you got turbos then :p
Because it\'s a hell of a lot cheaper :D
Here is another one with slightly higher in the revs peak power.
Notice that at 4500rpm it is already 100hp.
regards
Carl
That dyno sheet looks like a great powerband and revving out at 9500 sound like my cup o tea.
I think that would be an amazing sounding and probably very drivable engine.
What would the internal wear and tear be like on an engine like this? i mean would it be in a similar bracket to high power single turbo 13b\'s due to the level of modification and such closer tolerances when getting pushed or would the NA factor reduce this?.