Engine help.
 

I have a 1st gen rx7 and I am completely redoing it. I am looking to get approx 450hp (hopefully at the wheels) from it using carbs and it must be streatable. I don't really care about emmissions.
Help. Any sugestions on an engine? does anyone have a similar set up in a 1st gen? I have even looked at the 13b Cosmos engine. However cost is a factor. I am trying to do it as cheap as possible. I would not have to pay any labor cost for anything....not even porting work. I can call in a few favours on labour charges. Can I get 450hp normally without a turbo or nos?

Ryad

I believe it's possible but not very streetable.

Try "search" :-)


Also, there's another thread currently in the top of the list talking about horsepower and such.... It was mentioned in there that ~300rwhp is useful, but more gets to be a bit much on the road (to paraphrase DirectFreak)

Cheers

are you considering porting? that is the only way you will get there without forced induction.

Streetported 12a or 13b turbo. No way you'll get there n/a.

I've seen around 300 hp from an n/a 12a pp. That is around the highest possible without a turbo. 450 hp and cheap should not be used in the same paragraph. Look at directfreaks setup, it is very nicely done and he is around 370 hp i believe.

Or you could always swap in a v8, but don't expect anybody here to support you.

-Maarques

I think you will need some NOS, porting, or a huge turbo.


Good luck!!

Thanks guys. I will let you know what I come up with.

Ryad.

Can the power in a rotary be made as with a piston engine where you build a smaller dislpacement motor, but balance it perfectly and spin it to 14 or 15 thou? A la F1 and CART.

My limited understanding of rotaries isthis. You can build alot of power from them, however, converting that power to the wheels can be a challange at times. One theory is that unlike a piston engine with a crank, a rotary engine does not produce the momentum required to assist in transfering the power to the rear end. To compensate, a counter balance for the fly wheel is used. Dispite that, I prefer rotaries anyday. By changing your tire size, gear ratio, counterbalance and flywheel you can help in getting hp to the rear wheels. Also, you can get rotaries to rev at 14 or 15 grand (RPM). Hoever, what's more important is power generated within a certain power band. If you building power beteen 9-13 grand then you would not have much low end speed. (Light to light you would be slow).
Anyone, if I am wrong about any of the above, then let me know.

^I think you are getting power and force (torque) confused a little bit.

Uh, no. The counter weight is there to offset the mass of the rotor itself. It's not there to help push the rear wheels or whatever you thought it does. Sorry for the dumb-sounding explanation, but how many counterwights do you think a 20B (three rotor) has?

Thanks for the info.

It only has two counterweights for three rotors.

450 HP. thats freakin nuts.