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How much horsepower and/or speed is enough for the RX-8?

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Old 10-18-2006, 08:00 AM
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NA id say 240 250... with all the tuning and mods. and ya 350 whp is a good number for the 8. the other contributing factor of the 8 is traction with a turbo. I know that PTP have developed a wicked kit but their 0-60 is not all that impressive for the 390 hp they claimed. NOT KNOCKING PTP. but i do say that there is a problem with the 0-60. why is it that some cars go 0-60 in 4 or 5 seconds on a regular basis? we dont do that. and you would be hard pressed to find one. (besides PR's 20B which is a freak of mechanics) anyways ya. if you wanna see those 0-60 numbers drop... i have your solution. Turbo and a custom set up that will let you run with 355 tires. a 355 would have so much hook you wouldnt even leave a tread mark.

b
Old 10-18-2006, 08:12 AM
  #27  
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Originally Posted by shawn81
Nice so you are coming to the DARK side .... i have to say welcome and you will see boost make it much more fun... let us know how it went.
I ve been running Nitrous for a while, so got bored with it and desided to switch to turbo. Here is My progress if interested: https://www.rx8club.com/series-i-major-horsepower-upgrades-93/oh-well-here-comes-another-turbo-97855/
Old 10-18-2006, 08:48 AM
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I know a guy, near where I live, that his FD RX-7 can put 400whp with his stock 13b....the only thing he did he changed his turbo, injectors got an well tunned apexi computer by Steve Kan himself(GothamRacing.com)

So with that said, I cannot understand why the renesis could not be able to put 400whp either....so to my point of view 400 whp would my goal

And by the way a friend and I have in hand a 20B that need to be rebuilt (begin the rebuilt this winter) and our goal is around 500 hp

Frank

Last edited by rx8frank; 10-18-2006 at 08:54 AM.
Old 10-18-2006, 08:50 AM
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300 at rear wheels with enough reliability for 50k miles before a rebuild. In stock form the car simply doesn't have enough power on the straights on the track.
Old 10-18-2006, 08:59 AM
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Originally Posted by Umbra
In stock form the car simply doesn't have enough power on the straights on the track.
100% agree, if it is a high speed course.

A lbs/hp ratio of ~8:1 would do nicely, I think. That's about 375bhp.
Old 10-18-2006, 04:34 PM
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Are we assuming a peaky HP number or nice, flat torque?

300 WHP, flat torque, reliable, for $4000. My wallet is waiting.
Old 10-18-2006, 10:45 PM
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Originally Posted by silverwolf
NA id say 240 250... with all the tuning and mods. and ya 350 whp is a good number for the 8. the other contributing factor of the 8 is traction with a turbo. I know that PTP have developed a wicked kit but their 0-60 is not all that impressive for the 390 hp they claimed. NOT KNOCKING PTP. but i do say that there is a problem with the 0-60. why is it that some cars go 0-60 in 4 or 5 seconds on a regular basis? we dont do that. and you would be hard pressed to find one. (besides PR's 20B which is a freak of mechanics) anyways ya. if you wanna see those 0-60 numbers drop... i have your solution. Turbo and a custom set up that will let you run with 355 tires. a 355 would have so much hook you wouldnt even leave a tread mark.

b
I was going to mention that PTP RX-8...I have that issue of Car & Driver! The numbers it put up were about stock Evo 8 numbers yet this car should weigh less and was claimed to have more than 100 more HP! I do have to agree something had to be wrong!

As far as the topic at hand...I think I would be happy with a minimum of 300-350whp!
Old 10-19-2006, 12:20 AM
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Come on now. Is it ever really enough? I remeber when my 8 was stock I used to say 300whp would be more than enough for me. Now that I have that, I still want more. In fact, just today I was drooling over a video of a 600whp rx7.
Old 10-19-2006, 12:40 AM
  #34  
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Originally Posted by rkostolni
Come on now. Is it ever really enough? I remeber when my 8 was stock I used to say 300whp would be more than enough for me. Now that I have that, I still want more. In fact, just today I was drooling over a video of a 600whp rx7.
My sentiments exactly. You get some and want more, Plain and simple
Old 10-19-2006, 12:44 AM
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350 to the wheels reliably......
Old 10-19-2006, 06:36 AM
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Originally Posted by mike1324a
You get some and want more, Plain and simple
Does that remind anyone of anything else?

BTW in terms of HP a little more is all I require plus some low end torque.

if hi power is 230 (ha!) then I would like around 280 and good reliablity + drivability + reasonable price.
Old 10-19-2006, 08:26 AM
  #37  
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Rotary Engine
The crankshaft is fixed and the crankcase, pistons and cylinders rotate with the propeller.
Rotary engines were used extensively in early aircraft.
Now here is your torque monster.
Attached Thumbnails How much horsepower and/or speed is enough for the RX-8?-9cyl-rotary-001.jpg  
Old 10-19-2006, 08:50 AM
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mazdaspeed RX-8 300 hp = 260 rwhp
normal rx-8 247 hp = 215 rwhp

and the world would be perfect
Old 10-19-2006, 08:51 AM
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Originally Posted by Boris and Natasha
Rotary Engine
The crankshaft is fixed and the crankcase, pistons and cylinders rotate with the propeller.
Rotary engines were used extensively in early aircraft.
Now here is your torque monster.
thats a radial not a rotary
Old 10-19-2006, 09:36 AM
  #40  
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Would the correct answer be "100 more than I have"?
Old 10-19-2006, 09:54 AM
  #41  
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The car would be really nice with a 3 rotor, so I'd say 50% more power...but nice and broad, not peaky. I think 270 rwhp from a screwcharger would do the trick pretty nicely since 180 is about stock. It wouldn't make the 8 the most dominating sports car ever, but at least the motor would be on par with the handling and styling and everything else, and you wouldn't feel yourself struggling to pass your average Camry/Accord/etc.
Old 10-19-2006, 10:01 AM
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I have 2 feet and its pushing a 240 lb body moving forward at about 2.5 mph an hour. Reverse might be slower, about 0.5 mph.

I have more than enough hp for myself.
Old 10-19-2006, 11:07 AM
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Gotta agree with MaxxDamigz - 100 more than I have.

Give me 215whp, I want 315.

Give me 315, I want 415.

Etc.

Having said that, I would truly love to see my RX with 315-350whp. That would definitely reduce the number of excuses that would need to be made...

(As fast around the track as a 350z, but not as much oomph down the straight stretches, per Top Gear comparisons).

From previous posts that actually state a number, it sounds like the sweet zone is in that 300-350 range. Enuf said.
Old 10-19-2006, 11:23 AM
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Originally Posted by rotary crazy
thats a radial not a rotary

Sorry, that is a rotary, not a radial.

On a rotary the prop is bolted to the engine and the crankshaft is stationary.
On a radial the engine is stationary and the prop is bolted the crankshaft.
Old 10-19-2006, 11:37 AM
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put it has pistons, so it is a rotary piston engine not a wankel
Old 10-19-2006, 12:49 PM
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Originally Posted by rotary crazy
put it has pistons, so it is a rotary piston engine not a wankel
http://en.wikipedia.org/wiki/Rotary_engine
http://en.wikipedia.org/wiki/Radial_engine
Old 10-19-2006, 12:55 PM
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This article is about a type of piston engine

It is a standard Otto cycle engine, but instead of having an orthodox fixed cylinder block with rotating crankshaft, the crankshaft remains stationary and the entire cylinder block rotates around it.

rotary piston engines typically had a power-to-weight ratio advantage over more conventional engines.

as I said it is a rotary piston engine
Old 10-19-2006, 01:13 PM
  #48  
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My Jedi Powers have told me the correct answer without having to read everyone's posts.

581 hp! That would put it at one more then the Lamborghini Murcielago which would then make the RX-8 my all-time favorite car in the world.


okay okay, all kidding aside: I would say a tad over 300 whp would be mind blowing in an RX-8 and it would have the looks AND the power to compete with it's closest rivals.
Old 10-19-2006, 01:28 PM
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not for long! the murcielago is goin to have 640 for next year
Old 10-19-2006, 01:30 PM
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Originally Posted by rotary crazy
not for long! the murcielago is goin to have 640 for next year

That does it, I'm waiting till next year to buy mine...


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