Indeed the BMW 335 will be a formidable opponent for the G37, but not because of torque. It'll be the shear power (that's horsepower) advantage of the 335 for the win.

Automobile magazine's dyno results have already demonstrated that the power output of a given turbocharged 335 can vary by more than 30hp from a day to day basis. If the condition allows, the 335 engine management allows it to bang out in excess of 350hp. Good luck to the G37 on "that" day!

 

where is everyone getting these power ratings on the 335 from?
when has a stock 335i dyno'd the equiv of sae/std,dynojet 290+whp?
thats what it would take to have more power than the g37.

yes, i know about power under the curve, etc. look at the 335 dyno, boost is cut near redline stock.
the g37 just holds it power pretty much straight to fuel cut.

i guess bmw's marketing strategy is paying off
i really wish infiniti would have rated the g37 at 200hp.
then maybe people would think japanese engineering is somehow magical

 

hahha you should. The new G is badass, even though it doesn't look as agressive as most would like it to.

 

The source of all speculations, if you can call it that, originates from Automobile magazine's latest evaluations of the 335i and G37. Have a look yourself.

08' G37 article, 287hp
http://www.automobilemag.com/feature...niti_g37_dyno/
http://www.automobilemag.com/reviews...7_dyno_charts/


'07 335i article 1, 275hp:
http://www.automobilemag.com/feature...ter/index.html
http://www.automobilemag.com/feature...ter/index.html


'07 335i article 2, 284hp, peak result 300hp (last two paragraphs):
http://www.automobilemag.com/feature...sed/index.html
http://www.automobilemag.com/feature..._335i_dyno.jpg

 

again i repeat:
a boost spike doesnt count.. mathematically, that would amount to a momentary spike that has no bearing on total engine output (since the area of a spike = 0).

 

Have you not read the article to it's entirety?

Only the one 300hp take was suspected of a boost spike. The nominal results were: 276, 280, 280, 283, 285, 282, and 287 hp respectively.

 

So this is making LS1 power with a little less torque.

 

gotta get one on our dyno for sure =)

 

Well i heard something different from corporate, but this was a few months ago.

I know Mike and while he had input on a few things dealing with the 2003 model, he did not design it. The lead designer's name was AJ. That does not discredit Mike one bit, he is as tight as it gets with Nissan and the Z team.

 

yeah i know, and yes i read it...i think i mistook you- i thought you were saying that the boost spike made it somehow valid, (ie that the 335 dynos 290whp+)....my apologies.

anyway i already posted my thoughts but im going to try to calculate this out and see what the #s say.... im almost done, i will be charting it out and posting shortly.

 

I never trust dyno #'s . I figure that the best way to calculate hp is by trap speed and ET.


So I looked up a drag time for a 2007 335i.

http://www.dragtimes.com/BMW-335i-Timeslip-10490.html

Notice if you plug his trap speed into the calculator you get 371@flywheel, and 314@ rw. If you plug his ET in then you get 358@flywheel and 303@rw...very close to the articles estimates. However, his dynojet results say much differently....270 and 265<<17%drivetrain loss of 330flywheel would/should give you 273.9.

HP calculator>>>http://www.speedworldmotorplex.com/calc.htm

***Forgot to mention that on BWM's website the unladen weight of the 335i is 3571lbs.***

 

i tried to calculate the hp @ every rpm, and picked gears based on gearing and looking at the dyno. i assumed that you'd want to hold each gear to redline. in the case of the 335i, that might not be the best move because the power drops at upper rpms...but i didnt do any sort of analysis to figure out if the power loss at lower rpms was small enough to justify the gains of short shifting. in the case of the g, that definitely seems to be the way to go.

anyway here's what i found:


the 335i data is roughly estimated as i came up with a more accurate way to calculate the whp on the g after i had already put in the 335i data. (i will go back and redo the 335 data tomorrow)

i tried to remove bias from the #s and rounded up if i was in doubt (on the 335). i think the #s there are accurate +/-5whp or less...but either way i think it gives a fair idea of what's going on. what i took from this is that:

1. its a close race, especially when you consider the 335 is ~100lbs lighter
2. if a g37 driver wants to have max advantage, he should start at 55mph or so....
3. if a 335i driver wanted to have max advantage, he should start as slow as possible, find out if its a good idea to short shift, but most preferably get chipped.
4. an average 335 driver could be a problem for an average g37 driver because the 335 doesnt seem to be as sensitive to shifting mistakes as the g...for instance, short shifting in the g carries a large penalty while in the 335 the engine makes good hp and tq lower down. obviously you wouldnt want to make the mistake in either car, but at a glance that's what it looks like...i could be wrong here though

oh and imo the g37 should have had a 3.9FD. they probably didnt do it for fuel economy. i think that g37 with that FD would move through the gears as quick as a nonrevup 6mt G...which isnt bad at all, especially considering the gains.

finally someone correct me/question me if im wrong (or you think i am)!

 

he'll probably be there - his car is in body shop from a ludicrous crunch (details another time) - if he doesn’t bring his car, he'll come with Dee Dee - she has an MT coupe that should hang!

 

I could have sworn I read an article saying the G37 was faster than the 335i...Doesnt matter Im sure the Z with this motor will edge out the 335 though its not its competitor...

 

The suggestion wasn't that the G37 will lose to a 335 necessarily. Instead don't be alarmed if the 335 is able to keep up or even edge it out on a given day (based on the early empirical data we have). That has always been my sentiment at the very least.

 

No worries. As long as we're all on the same page now.

Nice chart you posted there. The whp-to-speed ratio is askewed, but the idea is there. Also those are "static" data sets. That is they are only for showing which platform has the "initial " advantage at a given speed (ie. start the race @ xxx mph). A "dynamic" chart is needed to better illustrate the differences between the two during the "race".

 

Looking at what 335i's are making when chipped makes all these G37 figures seem meaningless.

This is what the latest software update + exhaust is making at the wheels.

http://i112.photobucket.com/albums/n...oStg193oct.jpg

 

One word. . . wow. In a year, Im pretty much dead stuck on picking up that car. I talked to my dealer about european delivery already, I dont want to seem like a sellout, but the numbers dont lie, I spent way too much on my car and got way too little out of it. 335i is a total package I think and residual value is amazing. Couple that with price of european delivery and the deal is a very good one. If all is goes well, Ill use the saved money to actually drive the car through a nice euro tour for two weeks before i ship it out. Granted Ill do this unless the 09 Z can make my blood boil again.

 

Yeah pretty sweet huh!

It's a whole 'nother ball game when one's capable of tweaking with boost. This reminds me a lot like the last gen Audi S4 TTs - instant chump to champ, except the E90 isn't exactly a chump to begin with.

 

Those numbers for the PROcede 335i is impressive, but I've read some people have numerous problems after the upgrade. Personally, I wouldn't want to sacrifice daily drivability in search of power in plushy coupes/sedans like G37 and 335i.