What the... '07 Mz5 loses 4hp?!

[jandree22]

What the flip?! According to Mazda's 06 and 07 published information...

2006 Mazda5
157hp @ 6500 rpm
148lb/ft @ 3500 rpm

2007 Mazda5
153hp @ 6500 rpm
148lb/ft @ 4500 rpm

Discuss (ughdance)

[bumpin_p5]

Not much difference. Four horsepower? you won't be able to tell between the two if you drove them one after another. put a cold air intake and exhaust system on the 07 and you might add four horsepower. to get back up there with the '06. think of it that way. lol.

[Rotary_Powered]

I'm more concerned by the change the rev/torque band.

[bumpin_p5]

I'm more concerned by the change the rev/torque band.
Yeah I just noticed that. seems like a lot less torque. That is rather odd. four horsepower dropped and no telling how much torque, but a hell of alot more than 4 lbs/ft. lol

[JDM Sam]

Mazda may have adapted the new SAE method of hp/tq measurement

[jandree22]

2006 was SAE, too. Have the SAE specs changed? Not quite sure how SAE works...

But I agree, 4hp is negligible and not a big deal... I'm honestly happy with the zoom I get from my 5. I'm mostly concerned with the how and why?

[jandree22]

Nevermind I guess... pretty much the same thing happened to the MX-5 and both engines in the 6. Looks like the SAE strikes again.

[Zoom5Zoom]

Mazda may have adapted the new SAE method of hp/tq measurement. We have not changed the engine performance in anyway. It is just that simple the hp is measured at 4500 RPM.
153 HP is the rating for the 2007 end of story

You will see "ALL" manufacurers following suit for 2007

[jandree22]

Funny... SAE is all about making everybody uniform among hp measurement standards... except for the same exact car from one year to the next! Seems kinda goofy (flash)

[Wytchdctr]

Mazda may have adapted the new SAE method of hp/tq measurement. We have not changed the engine performance in anyway. It is just that simple the hp is measured at 4500 RPM.
153 HP is the rating for the 2007 end of story

You will see "ALL" manufacurers following suit for 2007

http://en.wikipedia.org/wiki/Horsepower
SAE changed there system in 2005, but I couldn't find any data about when Mazda made there changes. If thats the case then its the exact same motor and it really didn't loose anything.... but

What gets me is the 4500 thing. Thats not where they measured the hp, thats where the peak torque value was measured out of the entire rev range. The 2006 atleast had a diffrent cam timing/fuel/spark map that gave it a bit more torque than say a 2.3 in a 3. Thats why it lacks a few hp at peak when compared to the same 2.3 powerplant. The new SAE changes shouldn't have affected where the peaks in the power curve occur at just there values. Id honestly say it probably has more to do with changes made to the ecm, maybe to solve some of the odd ecm issues people have complained about or an emitions deal.

[JDM Sam]

Another possibility is they could have changed intake manifold design or cam profile. The fuel timing map is also a possibility.

[the_saint]

Another possibility is they could have changed intake manifold design or cam profile. The fuel timing map is also a possibility.
I bet it's the new "non-flammable" exhaust system.

[jandree22]

I bet it's the new "non-flammable" exhaust system.
As funny as that is, it could very well be true (lol2)

[P_bouchr]

FYI, Mazda has adapted to the new SAE system. Just read it this weekend in our annual auto guide (was checking if the 5 was quoted as well as last year, where it won the car of the year award).

So don't worry, it's the same engine.

The author was also talking about an eventual possibility for mazda to port the CX-7 turbo engine to the Mz5... mmmm, that's be interesting :).

[zoomzoom mazda5]

Stop by the dealer and ask them about this and all i got was this(dunno), Also got on the list for a mazdaspeed3 for the wife, and one won't even notice the differance on the power between the 06 and 07. Also Jandree22 how is your mazda5 , the picture you have of it at night is great!!!!!!! angelo

[Wuster]

Could it be Mazda tweaked the engine to run on E15 or E85?

[zoomzoom mazda5]

Good question.But who knows?

[the_saint]

Could it be Mazda tweaked the engine to run on E15 or E85?
Is there a sticker inside the fuel door that claims E85 compatibility?

[jandree22]

Also Jandree22 how is your mazda5 , the picture you have of it at night is great!!!!!!! angelo
Beyond loving it... It's so usable, high build quality, and most importantly, Zoom Zoom!!! It's so fun, contrary to me starting this topic, I'm VERY surprised with how nicely that lil 2.3 pulls. And family, co-workers, friends have been complimenting it after they get over the initial "WTF is that?!" reaction ;) Actually, one co-worker just bought a 3 over this summer, so of course he was all excited to see my purchase... we usually park close together anyways.

[zoomzoom mazda5]

Great to hear that, i love mine too, when i get or buy new camera i will post some pic's of mine with some of the ext. mods, will be working on a few int. ones soon (need to save money first). Enjoy! zoomzoom mazda5(drive2)

[Wuster]

Is there a sticker inside the fuel door that claims E85 compatibility?

Not in the 06. Any of you 07 owners have sticker inside your fuel door?

[jandree22]

Not in the 06. Any of you 07 owners have sticker inside your fuel door?
I think all cars (late model anyways) can handle like E10, whatever the low dose is set at. E85 requires more than a tweak, for starters you need an entirely new fuel system to resist corrosion from the additional O2 concentration. The 2007 owners manual does specifically state nothing more than E10. Bummer :p

[fam]

They probably tweaked the motor again to give more tq lower on the band, which reduces hp numbers but makes for a zippier entrance.

[Wytchdctr]

actually the peak torque shifted up, not down.

[jandree22]

I think it was mentioned earlier in this topic, but MazdaUSA got back in touch with me about this and they said it was a result of SAE changes.

[fam]

those tree huggin hippies.

[Mazda5wannabe]

The Society of Automotive Engineers are tree-hugging hippies?

[jandree22]

The Society of Automotive Engineers are tree-hugging hippies?
lol, why not! (hippy)

[Wytchdctr]

Ok I understand the new testing made alot of cars loose a horsepower or two, but the XXX@XXXX shows where the peak in its power curve was... why did the new tests show the peak 1k rpm later?

[fam]

hippies eat pot brownies.

[Wytchdctr]

how can you tell when a topic sails over someones head? ^^

[fam]

When a kind individual posts "how can you tell when a topic sails over someone's head?""

[jandree22]

Well I know I'm lost (boom03)

[Wytchdctr]

When a kind individual posts "how can you tell when a topic sails over someone's head?""

LOL, I am not the one who thinks the SAE are some liberal nuts. They just keep every one on a level playing field, your thinking of the EPA.

To clear things up, fam was making hippy references to the SAE because they changed the rules on how an engine must be setup to get an official hp rating. After the second silly comment I made my own comment trying to point out hippies had nothing to do with that change and that fam has no idea what they /we are talking about in this thread.

[fam]

fanny pack wearin hippies.

Im just makin light of the situation and saying dumb things, its up to the person to figure out if what im saying is real or made up. :-)