Jims5543

Mazdadrifter is right I think all you want to do is argue to virtues of a v-8 in a RX-7.



rfreeman27 is right 350tq as soon as you hit the gas = tire smoke



My mustang with 300tq would smoke the life out of my 225/24/17 hoosier slicks. My steet tires 275/35/18 Kumho Ecsta's would not stand up to the job either.



You asked about torque. I gave you a real world experiance not only from my driving experiance but also in competition against more powerful lighter cars. My Rotary wins.

mazdadrifter

sell me your fd block first!!! jims already has one!!! Seriously they suck anyways, they obviously can't make any power, I'm living a pipe dream, but I think they're prettier than a 13bt so I'll pay every penny of 500 dollars for your low milage fd block.



I can't afford tires so I have to stick with the rotary.

Jims5543

O.K here are 2 REAL dyno sheets one is a 2004 Z-06 the other is my FD powered FC.



Got the Z-06 one from here.



http://forums.corvetteforum.com/zerothread?id=663241





My dyno run:

mazdadrifter

jim's motor is a freak of nature tho, all other fd blocks suck, 500 dollars in your pocket



seriously the excel graph is way more accurate, v8 is the way to go

Jims5543

FYI - My car is run with a Motec M-4. It has 2 hours of dyno tuning on it. Obviuosly it needs more tuning. Right now I am content because it is real rich and strong and will last until I have time to tune it correctly.



Anyone who knows anything about 13B-rew can tell you I should be seeing close to 375RWHP.

94touring

Torque = low end power

Horsepower = top end power



The torque curve and horsepower curve will cross over each other at a certain rpm (5500 on a rotary I believe). Torque is what makes the wheels spin as a result of the thrust/force which the combustion of fuel/air in the engine produces. Stock V8's typically make more torque than most stock to mildly modified 2 rotors. Why is this? I'm guessing its the way they deliver the energy to the crankshaft.

mazdadrifter

probably has somethign to do with haveing 4 times the displacement too, and about 3 times as much moving mass



a more accurate comparison would be a 4 rotor (technically a 5.2 liter) vs a v8 5.7 liter

94touring

Well I guess if you go by a 4rotor to v8 comparison using displacement, the rotary is much more effiecient and will dominate a piston engine of the same size or larger.....wether you consider it 5.2 litre or 2.6.



Edit: NA engines of course.

Srce

My opinion is a bit swayed I admit. I love the rotary, but sometimes I hesitate to accept its disadvantages. I love the low end kick of a Cobra, and the 8K shifting point of a modded FD, but I'd chose a rotary of a comparable V8 any day. It depends on your driving and driving preferance like Jim said. He can probably offer you a less biast opinion, sorry I couldn't be of more help.

rfreeman27

One good thing about the rotary i (in a mild form) is you can point and plant. This is similar with cars with high amounts of lag. You might not start blazingly fast, but you will not have to worry about spinning.