[Tom DeArmond]

I say 180+ It's been years but I think I did 165mph in 300Z TT before fuel shut down by computer. Only a 300hp 5sp manual. I'am sticking with 180+.

[BoostedInPhx]

I have attached a zip file with an Excel spreedsheet that allows you to calculate the speed in each gear for an engine speed. On the left you can enter 3 different engine speeds in RPM. It will then show the speed in each gear for those 3 engine speeds. It has the gearing for both the 328 and 335 transmissions (automatic and manual). As can be seen the 335 auto has taller 5th and 6th gears. You can also change the revolutions per mile based on the tire size. This info can be found on the tire manufacture's site for each tire. The number shown is for the 255/35/18 RE50 RFT (833 revs per mile). Hope this helps in your speed guess.

[andrew20195]

Originally Posted by leftcoastman

Hmm, I could be wrong, but I thought it was the opposite. Torque is twisting force while HP is rate of change of twisting speed.

My thinking was that a diesel truck with a relatively large amount of torque can maintain speed up a steep incline better than the high revving HP-heavy, torque-deficient rice rocket.

But the rice rocket, with it's HP advantage can get up to speed faster. Is this not correct?

The simple answer (because I don't remember all the math behind it), is that area under the torque curve (at the wheels, after torque multiplication in the transmission) determines the acceleration characteristics of a vehicle. Of course, weight is also a factor. Horsepower is what opposes high speed wind resistance. If there are any engineers here, I'm sure one of them can bust out the formulas.

With the right gearing, and a high enough torque/weight ratio, and enough traction, a diesel should theoretically be able to out accelerate a rice rocket. The biggest problem with this is that diesels often have a narrower powerband, due to the limited engine speed, so they would lose more acceleration to shifting.

[CarbonE39m5]

i hit the 155 limiter in 5th gear at 6000rpms.. i didnt even shift into 6th.. i put 176 bcuz i think this car can do 170 stock..
this is what i did that night, just wanted to see how fast i could go in each gear.. keep in mind i have an AT
1st gear 25mph
2nd gear 60mph
3rd gear 100mph
4th gear 135mph
5th gear 155mph @ 6000 rpms

this is the complete truth i did it one night on my way home late at night. i let it redline all the way till it the computer shifted on it its own, 7000rpms.

[Carnage]

Originally Posted by ZCulture

Stock 335i manual: 165 MPH
XEDE Stage I 335i manual: 177 MPH

Calculated from http://vlsicad.ucsd.edu/~sharma/Potp...est_intro.html

This accounts for air drag, gearing, torque etc. Both speeds are air drag limited.

This is the best model I've seen yet. With it's air drag and figuring the 6th will max at 6000 RPM, the figure is somewhere between 170-177 (Xede model) on various calculators.

[Rob66]

Thats really the best calculator I have seen until now!

For the 335i with Xede and 19 inch wheels you get 179 mph!!!


Greetings Robert

[stressdoc]

The new Alpina B3 reportedly does 285 kph or about 178 mph. That should be very close to the PROcede equipped 335.

[aris214]

i was in my friend's 350z and we did a highway run. it took a long time to go from 140-150 (his car is lowered with a front lip and rear deck spoiler). even with good aerodynamics, wind resistance still goes up exponentially . since the procede 335i has about 400 bhp, i would guess mid 170's.

[Snakeii]

over 175 easy ive done 173 in a 330i so piss easy will be faster

[Jaws]

Originally Posted by Snakeii

over 175 easy ive done 173 in a 330i so piss easy will be faster

No chance that a 330 can do 173.

[Ryan(e92)]

Originally Posted by Jaws

No chance that a 330 can do 173.

agreed. Not anywhere near stock anyway.

[BavDom]

Originally Posted by andrew20195

The simple answer (because I don't remember all the math behind it), is that area under the torque curve (at the wheels, after torque multiplication in the transmission) determines the acceleration characteristics of a vehicle. Of course, weight is also a factor. Horsepower is what opposes high speed wind resistance. If there are any engineers here, I'm sure one of them can bust out the formulas.

With the right gearing, and a high enough torque/weight ratio, and enough traction, a diesel should theoretically be able to out accelerate a rice rocket. The biggest problem with this is that diesels often have a narrower powerband, due to the limited engine speed, so they would lose more acceleration to shifting.

Close enough torque is what in physics is referred to as an angular force. The definition of Torque (formula) is T(greek letter tau)= r x F. r is the position of the vector and F is the linear force acting on it. When you slam your car's throttle, the initial force you feel from the pull is dependent on the torque of the car.

[e36jakeo]

My 280 HP cammed E36 M3 can go 160 HP (redline in 5th gear). Even if I did not hit redline it would not have much more to go. A 255 HP 335i with more frontal area would not go faster than 160.

A 335i stock with 320 HP or so would probably go 165. An extra 60 WHP from the PROcede should bring to very close to 180 MPH at about 6300 RPMs (after which the power starts to taper off precipitously.

[y2b3k]

I voted for 176mph, but I think the 335i /w Procede can hit 178-179mph =D

Hope i get really close to the actual number

[DIVINE335]

Considering I can go 160 in my Stage 3 VW GTI with 310 WHP on stock gears, I hope this car can make the mark of 175+. If not, there are going to be a lot of pissed off 335I owners when I smoke'em with a hatchback VW.

[bnj]

Originally Posted by andrew20195

The simple answer (because I don't remember all the math behind it), is that area under the torque curve (at the wheels, after torque multiplication in the transmission) determines the acceleration characteristics of a vehicle. Of course, weight is also a factor. Horsepower is what opposes high speed wind resistance. If there are any engineers here, I'm sure one of them can bust out the formulas.

With the right gearing, and a high enough torque/weight ratio, and enough traction, a diesel should theoretically be able to out accelerate a rice rocket. The biggest problem with this is that diesels often have a narrower powerband, due to the limited engine speed, so they would lose more acceleration to shifting.

Torque means nice acceleration if you measure some 50-80 at the highest gear.
Horsepower determines acceleration, and that's why diesels are slower when compared to the respective gasoline models.
When you talk about losing more time in shifting, however, the number of shifts is basically the same and they take the same time... but when you talk about narrow powerband of diesels, yes its about POWERband not about torque. (btw the powerband/torqueband is not too narrow, it's just too low) Horsepower determines both the acceleration and top speed. That's because you keep the revs at around the peak power area by changing gears accordingly and by the way of using your peak hp-area you turn the most torque at the wheels. You do not have good acceleration at highest engine torque area shifting up at 3500-4000 rpm.

[Italteen3]

I'm guessing 172mph actual speed. Speedometer might read higher.

[stressdoc]

Originally Posted by Italteen3

I'm guessing 172mph actual speed. Speedometer might read higher.

No doubt the speedo would read higher -- if only it could. Anyone know if the 'real speed' readout can go above 160 mph?

[oilcrankinject]

back from the dead!!!

Has anyone confirmed this?

[v2bling]

Ive done 160 two times and 165 once. The 165 or under was with 4 people That was with the procede 11-15 maps stage 0. I get to 120 just like that with the new demo maps shiv posted! Way quicker then before

I think my mtech kit helps alot and so does the drop. I also have a oem wing on the rear that prob pushs me down more. Cause when im going 160 the car is smoother there then it is at 80.. It gets so quiet up top its crazy ! The 5 series is super stable from the looks of it. I took out my rear spare tire..

[RiXst3r]

wow, way too fast for me, lol... but its nice to know its there just incase you find yourself on the autobahn

[v2bling]

Originally Posted by RiXst3r

wow, way too fast for me, lol... but its nice to know its there just incase you find yourself on the autobahn

It doesnt take very long to go from 110 to 150.. Its quicker than going from like 60-110.. Trust me it doesnt take much road to get to that speed haha. I did it almost within a exit or two on the hwy...