330 ZHP vs Z3 M coupe

[gpoints]

The other 5 hp. is an actual difference based on exhaust/emissions.)

I disagree with this item. From my readings, there is no true difference in hp between the Euro Spec and US spec E46 M3. The difference is caused by the difference in how bhp is measured VS how sae hp is measured. [???1]

BTW, I'm not picking a fight, I feel you are one of the more Knowledgeable individuals on this board

FWIW - Here's where I was getting my info:

http://www.fact-index.com/h/ho/horsepower.html

bhp
Brake horsepower was a term commonly used before the 1970s in the USA, and is still common in the UK. It indicates the brake, the device for measuring the true power of the engine. Stating power in 'bhp' gives some indication this is a true reading, rather than a calculated or predicted one. However, several manufacturers started to strip their engines of essential ancilliaries for the purposes of getting a high horsepower figure to use in marketing the car.

In the USA the term fell into disuse after the American Society of Automotive Engineers (SAE) recommended manufacturers use "hp (SAE)" to indicate the power of the engine, given that particular car's complete engine installation. The British market seemed not to need the correction.

 

[brahtw8]

I disagree with this item. From my readings, there is no true difference in hp between the Euro Spec and US spec E46 M3. The difference is caused by the difference in how bhp is measured VS how sae hp is measured. [???1]

BTW, I'm not picking a fight, I feel you are one of the more Knowledgeable individuals on this board

[/I]

I have seen many sources that confirm the actual power difference of 5 hp.

I would be interested in seeing what sources claim there is no difference.

In any event, the answer can be verified without a google search. The answer is in the math for converting DIN to SAE:

The Euro M3 is rated at 343 DIN hp. The US M3 is rated at 333 SAE hp.

343 x .98629 = 338.29

The missing 5 hp. is emissions/exhaust related and actual, not simply a different measure.

This is also why the E39 M5 is often stated to have 400 hp (DIN) when it is rated at 394 (SAE) US.

400 x .98629 = 394.51 hp.

 

[gpoints]

I understand the conversion difference (DIN/SAE HP). However the # you are using for your conversion is bhp and bhp will inherently be greater.

In short, I think the #'s are different because of the conversion and bhp vs. sae.

I could be (and probably am) wrong.

 

[brahtw8]

http://www.bmwcca.org/Roundel/2000/1100fea.htm


The engine, of course, is the heart of the. M3. By now you know the. basics: a huge. boost in horsepower and a substantial boost in torque. The. European horsepower rating is 343 DIN, the U.S. engine 333 SAE. The two rating systems are. different; 343 DIN equals 338 SAE. The remaining five horses -- the. only real difference between the U.S.-spe.c cars and the Euro version -- is accounted for by the. placement of the. catalytic converters in U.S. models. In order to achieve the. rapid heating required to pass start-up emission standards, the cats are. moved closer to the exhaust manifold on the U.S. cars. The exhaust is so highly tuned for this engine that five horsepower is lost by this relatively minor move.

 

[MrElussive]

This is a worthless post from me but, why are you all getting drunk???? Wait for me !!!!!!!!!!!!!!

 

[kjs862]

Anyone know how the 315hp m z3 stacks up against a e46 m3 ? You see I'm getting rid of my 05 zhp and need to start looking for someting soon. I def want something faster. I'm also considering a 1999+ porsche 911, but the ones that are in my price range are the 3.4 litre not the 3.6.

Comments appreciated.

Thanks,
Ken

 

[JGM3E3632]

my dad just bought a 2001 M Roadster. I just installed a Jim C chip. The car is very nice. I prefer my E36 M3 when it comes to handling. His is very fast though. With all the mods to my car(E36 m3), the M roadster (315hp stock) apporx. 325 with the Jim C injector. The two of them seem equal in a straight line. I have tried to get him to race me. He never wants to race. I think I would beat him because I am a better driver. He bought it on ebay. The car was located in CA. The car has 21000 miles, paint and body look new. He paid 32,000 plus shipping to GA. Approx. 1400.00.

 

[gpoints]

This is a worthless post from me but, why are you all getting drunk???? Wait for me !!!!!!!!!!!!!!

If you hurry, you can still make it.


brahtw8, good find!

Looks like my logic was flawed.

 

[kjs862]

Its ashame that some of the guys on this board consider helping others a waste of time. The point of this forum is for people to communicate and help others.