Atilla

iTrader: (1)

dozer

iTrader: (3)

9krpmrx8

iTrader: (46)

That's what I thought. I guess that shuts up the nay sayers. You could get manual cut out for even cheaper but they will be a PIA.

trustbuddy

iTrader: (3)

yep, you got to get under the car and manually remove the blocking plate- definite PITA.

9krpmrx8

iTrader: (46)

Yeah, if its only for track duty it would be cool but I'm going for the electronic.

I wonder what your dyno sheet would say if it was mounted before the cat or in a straight midpipe. But then you would need to flame proof your undercarriage, haha!

RX8-Frontier

RG... Not to stir up the pot, but you're wrong... Horsepower is NOT Work. (Neither is Torque, but hey, sometimes we have to share and everybody be wrong...)

POWER is a function of the amount of WORK done over a period of time, it is NOT a measurement of the WORK...

In other words, Horsepower is how fast we can do the WORK; WORK is the total amount of energy spent...

And if you follow the units...

1 Horsepower (Power) is 550 lb-ft / second.

Work is sum of the horsepower (power) per time, so lb-ft/s * s = lb-ft.

Torque, as ya' know, is lb-ft...

Units are the SAME for Work and for Torque... Hmm...

But before someone gets too frisky...no, they are NOT the interchangeable terms, as torque is just an instantaneous measurement, whereas Work is the summation of all the horsepower been done over time.

(If someone is REALLY being a nerd... Work can be found by taking the integral of the horsepower curve over the time, which is equal to the area under the curve. For your own sanity, please don't do this; THIS is a worthless number to compare acceleration of cars!!! This is only gonna' be done when you're finding the efficiency of an engine, 'cause you'll find the energy used verses the amount of energy dumped in (fuel). Means nothin' to us... Gawd I hate math...)

The three things are related, but the kicker is, only torque, revolutions, and time are measureable. Everything else has to be derived. What's that mean for us? Welp, a whole lot of nothin', for the most part...

And since torque curves aren't perfectly flat, in all honestly, NONE of the absolute values are useful to compare one car to another, 'cause the MAX HP comparison is just about as useless as a MAX TORQUE comparison... RELATIVE changes are what's significant; without having taking it all into context (RPMs, gears, etc.), a single value is good only to put on a marketing brochure to compare ***** sizes of two cars... Nothing more, nothing less.

Hated to call you on this, but you basically begged to be corrected with your last sentence...

staticlag

Units aren't the same for work and torque, work is ft-lb/sec, torque is just ft-lbs

05rex8

iTrader: (7)

Hmm....+10HP with **** sounding exhaust....pass. Where's the class? A sexy car deserves a sexy exhaust note and some nice tips to go with it. If this was on a 1987 camaro, then that would make sense. 10 HP is not worth that to me. My opinion of course.

9krpmrx8

iTrader: (46)

Hmmm.... +5HP and $1,000.00 poorer.......pass. Class? So spending $1,000.00 on a an exhaust just for sound and looks is classy? That's hilarious. How do you know what it sounds like? Who gives a **** what it sounds like at the track anyway? This mod could be done while retaining a nice sounding exhaust for cruising. My opinion of course.

RX8-Frontier

No, it's not.

W=F x (delta)d. That's Work = Force x Change in Distance. That's lb-ft, in this case.

A quick google and you'll find this at the top:

http://tutor4physics.com/unitsofwork.htm

Power is Work divided by time, aka, P = W/t, aka: lb-ft/s. 1 hp = 550 lb-ft/s.

Power and Work are NOT the same thing. Sorry, but thanks for playin'!

staticlag

Dude! you are silly! Look on that link you posted me Your forgetting that work & force are both vectors and need an acceleration. a Newton is kg-m/s^2.

Check your units.

No, Thank YOU! for playing

9krpmrx8

iTrader: (46)

If you work hard you have the power!!! Muahahahah!!!

RX8-Frontier

Aye carumba...

Ok...

Edit:

I had a long drawn out explanation, but I figure I may as well start adopting the "terms" around here... You can SEARCH if you want more explanation...

But essentially... You're confusing lbs of weight with lbs of force... Torque is pounds (of force) times a distance. Work is pounds (of force) times a distance. The units are the SAME: lb-ft in English, and N-m in SI (these are forces times a distance, not masses times a distance... A lb is NOT a mass; neither is a Newton (which you already recognized)).

If you want to talk about them in terms of mass & acceleration, then it's (slugs*ft/s^2)-ft in English, and (kg*m/s^2)-m in SI. But why would you want to do that? There's a reason why we're talking in force, and not in mass x acceleration... It's just simplier language. But you can convert units all day long, and at the end of the day, Torque and Work have the same units, but they're different things. And Horsepower is different from both of them, which was my point in the first place.

Do we get to go for round 3, yet? Or have you learned anything, yet...?

9krpmrx8

iTrader: (46)

Okay, enough with the physics class, the Dyno charts are posted. I wonder what the gain in torque was?

rotary.enthusiast

~5 ft-lbs from 5500 RPM to redline, which is about a 4% increase in output. On a dedicated track car that races in a class that has no decibel limit it might be a good idea, but I wouldn't do it to my car.

9krpmrx8

iTrader: (46)

I wanna hear that banshee!!! Too bad it can't sound like a cammed LS6.

trustbuddy

iTrader: (3)

according to Fast Freddy's my 8's torque topped out at 129.
i don't know what the difference was.
sadly the chart was all broken up because supposedly i have bad spark plug wires or spark plugs.

05rex8

iTrader: (7)

ok, I didn't spend 1,000 dollars for my exhaust, nor did I buy it for power. I bought a turbo for that.

And no a catback will not give you much power, it's the catless midpipe that will, btw.

newguy

someone needs to make a $300 aluminized midpipe/catback vs. the $600 systems available now. Makes sense since the resale is half price now

this cutout makes sense if you want to keep a quiet ride and hit the track occasionally. Not what Id use if I went turbo. This is definately a fun car but sometimes life at 40 makes you a bit rediculous pulling up buzzing like a bee depending on the situation. Dont get me wrong I hear the differance between a fart canned honda and the 8 w/ an Agency Power or HKS but 95% of humanity doesnt.

The high$/hp ratio makes the MM/cobb ap and test pipe my 1st and maybe only mods unless I decide to drag it then maybe some nitrous

nelsoncs

This is thread should be made into a soap opera. My opinion, of course.

trustbuddy

iTrader: (3)

yes it certainly does.

ninjatrader

iTrader: (1)

Or scare the bejeezus out of some ricer reving up next to you when you're crusin in stock mode.

Renesis07

iTrader: (1)

I wonder what I gained with my midpipe lol. I never dynoed before but Im at 192whp now.

9krpmrx8

iTrader: (46)

Turbo Smurbo. Been there done that. It makes sense on some cars but not the 8 unless you have money to burn. Oh, and the Agency Power catback retails for over $700.00. It might be worth it since you are blown but on a NA RX-8 it would be a waste IMO. Fact is, this mod produces decent HP at a low price. If your not feeling it thats cool, thats why I like forums, we can discuss things and express on our opinions. hell part of modding cars is learning from mistakes. I think most of us have done mods on our cars that we regret. We learn from our experiences.

At a track day I could care less what it sounds like since there are a large number of loud *** track cars buzzing around. There was a black Turbo 8 here in San Antonio that ran mid 13's in the 1/4. He came out to an AutoX and got owned by our local stig who drives a WB RX8. He was disappointed so he asked the owner of the WB to drive his car for two runs and while the owner of the WB was faster in the turbo car than its owner was, his runs were not as quick as they were in his NA RX8. He said the turbo cars power band was all over the place and power was hard to predict. Cars should be built for purpose and I would rather have a slower car that is good all around than a car that is fast in only one thing.

05rex8

iTrader: (7)

^you are right about the price, but it comes with a midpipe, so cut that price in half or so I sold the midpipe too btw

it's all good, to each their own, just not my taste

as far as the turbo 8 getting owned by a n/a one...I'm sure with a bit more experience and practice, the turbo 8 would walk all over the N/A one