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Discussion Starter #1
I was wondering if anyone had a graph of the 2002 330Ci's (stock) performance across the complete rpm range. I'm looking to compare it to another vehicle. A table of the numbers at certain rpms would be greatly appeciated. I was also wonder what the best quarter mile time you have ever seen in a 330Ci on stock tires??? I've seen alot of 14.7 at 96mph, but heard of a few 14.4's and even a 14.1 one time and none clocking over 100mph in the quarter. I'm asking all this because my friend is getting a new Z and he is making 287hp and should pull a 13.9 at 102mph. He's seen articles (I think the new road and track)that show the car runs a 14.3 but clocks 100mph... how could there be a 65hp difference (287-225=62) and be this small of a performance difference? 2-4tens and 4mph. Normally 60-70hp causes a close to 1 second difference in the quarter mile when talking 14s.... Maybe like some say BMW unposts its hp numbers.... maybe the drive in the new Z sucks... maybe I'm seeing a really good bmw drive or the person that posted the 14.1 is lying.....

I'm practically 99% sure the Z is going to surpass my 225hp motor in a race, I was just wondering why its so close. Most mid 14 second cars don't have only 225hp, heck the V8 Mustang (260hp) pulled a mid-15 (well in automatic).......I'm just blabbing on here. If anyone has a graph of stock performance can you please post them here.... I was thinking I might make more low end torque.... I might lose the first race but he doesn't want to meet the rath of the M :bigpimp:
Thanks in Advance!
 

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Discussion Starter #2
Oh I forgot to throw this in the works....

Infiniti G35 BMW 330i
Weight 3470 3340
Horsepower 260 225
Torque 260 214
Final Ratio 3.36:1 2.93:1
1/4 Mile 14.7 95.2mph 14.7 @ 96.3mph

Before I get yelled at the infiniti was an auto and the bmw was a stick... this is straight out of the road and track july 2002

My question again is why practically the same weight 170lb. advantage to the bmw, 35hp advantage for G35, 46ft/lb torque advantage G35, and the drive ratio advantage.. but the bmw gets a quicker trap in the quarter..... something doesn't seem right here.

The new Z uses the same motor but makes 27 more hp....
 

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Rufus330Ci said:
..... something doesn't seem right here.
Repeat after me:

HP = Torque * RPM / 5252

For the G35:

Peak Horsepower 260 @ 6,000 RPM = 228 lb-ft
Peak Torque 260 lb-ft @ 4,800 RPM = 238 hp

For the 330:

Peak Horsepower 225 @ 5,900 = 200 lb-ft
Peak Torque 214 lb-ft @ 3,500 = 143 hp

The 330's advantage is it has about the same torque throughout the upper rev range. The G35 has to shift more often to get the best torque.

The cars are very close.
 

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ObD said:


Repeat after me:

HP = Torque * RPM / 5252

For the G35:

Peak Horsepower 260 @ 6,000 RPM = 228 lb-ft
Peak Torque 260 lb-ft @ 4,800 RPM = 238 hp

For the 330:

Peak Horsepower 225 @ 5,900 = 200 lb-ft
Peak Torque 214 lb-ft @ 3,500 = 143 hp

The 330's advantage is it has about the same torque throughout the upper rev range. The G35 has to shift more often to get the best torque.

The cars are very close.
I repeated many times but still can't understand how the equation and the numbers answer the original question.
I also don't see how they are related to your last statement/conclusion.
 

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Discussion Starter #6
Ok so higher rpms at peak torque I understand to keep in the gearing. But still thats a 28lb/ft difference and the G35 makes that power at a higher rpm 4800 apposed to 3500..

So what your saying is the bmw retains and I think I read this (90%) of its torque from 1500-6000 rpms. Which is a good thing does anyone have a graph of this? I guess its really not neccesary but I was wondering if anyone had some numbers at different rpms of the G35 or new Z that uses the same engine. Maybe they only make 100lb/ft at 1500 where we make close to 200lb/ft..... I still understand this is automatic vs. stick numbers.

Oh I wanna throw another spoon in the mix. My other friend has a Porsche Boxster S. He makes 250hp and the magazines say 14.6 at 94mph for the none turbo and 14.0 at 100 for the turbo. He must be making better torque then me :)
 

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Rufus330Ci said:

Oh I wanna throw another spoon in the mix. My other friend has a Porsche Boxster S. He makes 250hp and the magazines say 14.6 at 94mph for the none turbo and 14.0 at 100 for the turbo. He must be making better torque then me :)
Correction: the Porsche Boxster does NOT have a turbo in either version.
 

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Discussion Starter #8
My bad.... how did they jump from 201 to 250hp?? Is it the same size motor?? Please educate a youngin :O)
 

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Rufus330Ci said:
My bad.... how did they jump from 201 to 250hp?? Is it the same size motor?? Please educate a youngin :O)
Bigger engine

Boxster - 2.7 liter
Boxster S - 3.2 liter
 
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