Takumi

I'm new to this forum and new to mechanical world. So far I think I understand the torque/hp dealy do dad. 165 does seem low. but When we rev the car to 9000. Is 9000 the absolute max or is it the safest you should rev it up to.

wakeech

ah, my new best bud Taku!! welcome to the forum.
well, the thing about torque is that it isn't the most important number to pay attention to when you're thinking about engine performance. the amount of work an engine can do at a certain RPM (which is area under the graph from the origin up to the RPM you're talking about), and for me and most other enthusiasts, power. this little gem'll be making something in the ballpark of 250 bhp, and that's tons, at least for me.

how new to the mechanical world?? if you've got queries and questions about the intricate innerworkings of a rotary engine, please visit this site:
www.rotaryengineillustrated.com

no, it's not mine nor do i know the guy that's makin' it, but it's the best thing out since sliced bread, no kiddin'!! :D
oh, the last time i checked he was reconstructing/updating the Rotary Engine 101 section, so whenever that's back up, there'll be plenty to see.

now, getting to your quesiotn about RPM: 9K is the expected maximum RPM for the production RENESIS, and there are many many reasons why it's a maximum, and not a suggestion... and ya, i suppose you could say that in the grander scheme of things, it all adds up to "safety", for the engine at least.

there was a thread in the requests section, i think, called "Unlimited RPM" or something, which had me and a couple o' other regulars talking about precisely this issue.

welcome to the board :D

Takumi

cool ty. I'm fairly new. I just started this summer in making my own repairs. I read the article on www.howthingswork.com about how the rotary engines. Thats as far as I know (as much as i can remember about the rotary engine.) but I like how it works. It seems to mee u could flip ( like a barrel roll) and the engine will still work =D.

Sputnik

Hey, ticket fixes in Ohio for RX8s!!!! But seriously, good luck with that!

Quote:

...All these upgrades give it 300 horsepower and 300 foot-pounds of torque. However, the most interesting thing is the distribution of the horsepower and torque. The car makes it's peak horsepower and peak torque at nearly the same RPM (5100 and 4900 respectively). This was designed so that the interceptor, when punched from a dead stop, will supply sufficient power to give one hell of a jump without letting the tires slip. FHM magazine did a story on the NYPD interceptor, and they say it's sufficient power to get the cruiser going while the "bad guys are spinning their tires"....

with this in mind, i think i'd like to see MORE torque in general, not more low end torque. it's all that low end torque that will spin those tires... high end torque, IMO, is better.

IMO, the lack of "spinning tires" thing is a nice side effect that someone is taking out of proportion (depending on what the FHM article said). They are only going by "peak" numbers, which only tell some of the story. IIRC (it's been awhile since I saw numbers of a current Interceptor motor), the change basically opens up the top end, moving the "peak" torque numbers higher. The engine probably has the same appox. torque numbers at lower rpms as the "unimproved" engine, which means that it will actually have the same propensity to spin the rear tires as the other engine (unless they drastically changed the cams too). Tranny and rear-end gearing should have more to do with tire spin than the few simple mods that were done.

As far as the "bad guys are spinning their tires" thing, my turbo Miata should outrun a 300/300 Interceptor (well, top gear might limit it on a 140 mph freeway dash). If a "bad guy" stole it, I doubt that the tires would spin too much under him, unless he was a very bad driver, in which case, I might as well forget getting the car back in one piece...

---jps