RX8-TX

I was @ a Barnes & Noble store going through some magazines a couple of weeks ago. I was getting ready to get my fix of caffeine & car magazines. I picked up an issue of Turbo Magazine, which was one of the few I hadn't read yet.

I get the magazine, get my coffee and go sit on the patio. An hour later, I was done reading, smoking & drinking. I dropped the mag on the table, when I notice an add on the back. It was a Greddy ad. Upon closer inspection, it was an ad for Greddy's RX-8 bolt-on turbo kit.


Everything was dandy until I read this part


"WTF?!" I thought for a moment. At first I thought these guys were advertising flywheel figures -until I looked at the stock torque rating. Even my punny stock 8 puts down 130 something ft-lbs of torque to the WHEELS. But then, only something like 179whp. My question then, Greddy....did your marketing dpt. got slightly 'confused' while typing up the ad? Would someone care to enlighten me on this one, or is it yet proof that all manufacturers are full of it?

Jedi54

iTrader: (7)

Where's the guy with the "Bullshit" flag?!

202.2 HP? WTF?! That's definitely not the hp claim from Mazda and no way is that the power at the Wheels... Where'd they get that number??

RX8-TX

I am tempted to reply to that....

zoom44

several p[eople have dyno'd 200 at the wheels
does gredy mention the dyno in the add?

wedge357

somebody in this forum did make 200+hp stock and Greddy took that number and ran with it. It is by no means representative of average whp for most people but hey, they can't be accused of making it up now, can they? It does suck when an aftermarket company fluff up their product; just look at k&n intake, it's advertised to give you a guaranteed +9hp but you and I know its horsesh!t...

RX8-TX

I believe you, I know of one from the NE forums -I think!. But those numbers don't quite go hand in hand. It would have to be a motor that breathes extremely well up top to come up @ 202whp @ 8200 w/such a low torque figure. And no, they don't mention dyno, conditions, setup, nothing.

Edit: First on the list: http://www.myrotarycar.com/mazda-rx8_2004_Dynos.asp
Notice the mod list.

NAVILESRX8

iTrader: (1)

Why are you so bent out of shape over this? For one, it would make Greddy look better if they did start with the lower hp numbers that most of you guys have been gettin on dynos. They didn't. Oooohh..."the published figure is 10 lb ft off from my car"

So what?

zoom44

good point. they used a high number to start. i fthey had used 185 instead the increase from thei r turbo would look much beter from a marketing standpoint

zoom44

TX is that Marietta8's dyno?

RX8-TX

I believe so...

RX8-TX

Bent out of shape? Not really gonna lose any sleep over it if that's what you are thinking. I guess I just thought Greddy was different from K&N. That's why...

And its not only 10 lb-ft over my car...its like 20hp higher. Heck, I'll buy their test-mule engine if its still usable -or ever existed....

And besides....c'mon, that ad is pure bs. Are you gonna argue that now?

David_M

Considering that in the major horsepower upgrades section there are more than a few members claiming nearly if not more than 260 WHP, does anyone need to argue. That 260 WHP can be attained with the greddy kit has already been proven, of course your results may differ. Ultimately if you don't believe them or any of the claims on this board it's your privilage to not buy it.

Lock & Load

Here you go us Aussies allways seem to be saying .



B......free
michael

RX8-TX

I question the fact that they seem to have pulled random numbers for their, so called, stock baseline. You can interpret that as: "Well, Billy, you started out at 180....that's why you are so far far far away from 260 ma'boy..."

I never said anything about claims being made on this or any other board. I am not questioning what greddy kit adopters have achieved or not. Like I said, I question the sales strategy....

Icemastr

Do you know how to calculate HP? HP = Torque *RPM / 5252. If MAXIMUM torque is 125.7 and max HP is at 8200 / 5252 = 196 HP. Not quite adding up is it? In fact you would need 125.7 torque at 8450 RPM to reach the 202.2 HP mark. And that is basing off the max torque, which obviously has dropped off just a tad by that point. Not that it is really false advertising because it just makes the difference between the performance gains of the turbo smaller.

RX8-TX

Yes I do...

Icemastr

And you said an RX-8 would have to breath very well up high with that low of a torque figure when I just showed with a maximum torque figure like that it wouldn't make that much HP at 8200 RPM.

RX8-TX

I overlooked the peak power @ rpm. It was supposed to say that: to make that much power, with such low peak torque, you'd nee to rev the heck out of it, and the engine would also need to be able to breathe in enough air. Happy now? See...at least I am not selling you anything...

rotarygod

Since the RX-8 actually does make around 238 hp at the crank, it is safe to assume that it would make power around the 200 hp mark or in the ballpark at the wheels. Greddy's kit is capable of making about 260 rwhp. I don't see the problem. The biggest issue we see everyday is that people believe dyno numbers for a car that alters the engine management system when it's on a dyno. This car does NOT dyno accurately. This still doesn't explain where Greddy got that number but it is a believable number. If they advertised 300+ then we'd know they were lying.

RX8-TX

Problem is they are not believable together......

rotarygod

Why not? It's right in line with what everyone else is gaining from an added horsepower perspective.

RX8-TX

I am not talking about the before and after. Here, take a look at this:

I can't say anything about the torque curve that the turbo version would create, but I know darn well that a stock engine DOES NOT breath all that great after 7K5rpms.
The chart I posted assumes that the engine produces a flat torque curve equal to peak torque. Now, is that realistic on the turbo version? How would I know!
Is that realistic on a stock motor? NO.
Am I questioning the absolute numbers? YES (albeit, we don't know correction, yada yada yada)
Do the stock numbers look fabricated (and badly at that?) YES.

NAVILESRX8

iTrader: (1)

Seriously dude....why are you so hell bent on making a huge deal about this? I don't see the point.....so the Greddy marketing guys picked out some numbers....big deal...we all know how the kit works....geez...relax man....

zoom44

stock hp starts dropping at 8500. turbo should as drop after 7ish since they are dropping the boost off after that

RX8-TX

Dude....I am responding to questions. I answered yours before...I am not losing any sleep over this. Now, just stop repeating yourself.