alright so i believe the srt6 will do 0-60 in around 4.8 or so. what i don't get is how these bmw 335i owners are claiming 0-60 times around 4.5-4.7 when they have less power and weigh 500 lbs more. the numbers just dont add up. are these bmw owners full of it?

 

Those 60 times seem realistic.

A gentlemen I work with owns a 2003 540i. With the limited knowledge/statistics I know about these vehicles, from what I've gathered just knowing this individual overcome years, BMW puts down a very fine tuned machine. Liquid cooled alternaters, O2 sensors swapped on routine schedule, or just adding aftermarket headers, swapping different series intake manifolds, all contribute to serious performance numbers, more so then your typical small block V8.

Of course my knowledge is limited, but as I mentioned those numbers likely are very realistic.

 

My 335i pulled 0-60 off in high 4's stock, but not mid 4's. However, I never tried lauching in 2nd gear until I had a tune and downpipes. The HP/TQ numbers are a bit underrated for the BMW too by the way.


My highly modified SRT6 would pull a 3.9 only after these mods on street tires, which probably costs around 6K.

- Stacked pulleys
- NW sheet metal intake manifolds
- Wavetrac
- Rear-end gear swap with TCU
- NW single
- Fuel mods galore to support the boost


My 335i has run 3.9 second 0-60 on the street with the following mods, with maybe $1,025 spent. I could have spent $500 less, but didn't realize it until recently.

- $100 intake
- $625 Cobb V3 tuner (could have done this part for $100)
- $300 downpipes

Here's the video:

https://youtu.be/ScpFqaJL5Ws

I suggest you not bet any money on a race with a modified 335 unless you're at the track with good drag radials, as that's where the SRT6 really shines.

 

i hear what you are saying about how finely tuned they are but the fact remains that the srt6 is much lighter and produces more power but is still slower according to the numbers these 335i owners are touting. i just dont see how.

 

grip grip: it looks like the 335i has way more potential lol. i was just talking stock for stock though. a 3.9 with just that is crazy! thats quicker than an m3. sounds like your 335 would make some v8 amg's look bad.

 

I'm very surprised at how quickly the 335i has become an animal. I recently trapped 116 mph in the 1/4 back to back in 2,300' DA, when my highly modified SRT6 would die off after one run and only hit 116 and 117 in very low DA.


I'm not trying to bash the SRT6, but the 335 is capable of 500WHP with just bolt-on's on stock turbo's. There are guys with 3K in turbo's hitting well over 550WHP, and single turbo guys at over 700WHP with no internal mods. Just saying.

Keep in mind, I'll be posting over on the BMW site that they better watch out for the SRT6 at the track, so I hope you understand I'm neutral and plan to own as many interesting cars as I can experience in my lifetime.

 

Well a 65 Pontiac turned 3.8 thanks to Jan Norbye's magic stopwatch.

 

How about gearing? SRT came with 3.07, not a performance gear at all. Many imports come with 3.90 or lower(higher numerically) and gears can make a big difference.

 

Newer technology. V6 twin turbo vs a dated supercharged V6. N54 has way more potential when it comes to mods and gaining a ton of power with little mods. Turbo for the win all the time on smaller motors. The N54 could have 306-335hp STOCK 295-330ft lbs stock too. There are so many BMW models and trims it makes my head spin haha.

Luckily I believe that is an easy fix and I am sure they have fixed the issues with the pumps. Other than that, very stout cars. Direct Injection is pretty scary though when you think about it. so much fuel pressure and a dirty burning engine.

http://www.autoguide.com/auto-news/2...engines-.html]

As for launching goes, I have a SRT-6 with the DCAI and that is it. Always leave TCS off when at the track and on the street for best performance?

 

How "fast" a car is depends on a lot of things and not just how much "power" it makes.

You have to consider many things (I'm more interested in the gearing and the area under the torque curve than maxes.

Back in the early '60s there was a group called the "RamChargers" and despite somewhat archaeic running gear dominated SS Drag racing. Mainly because they made a science out of weight tranfer. Coming off the line it looked like the car was rising stright up and level. Didn't look like anything else but came off the line faster and that was what counted.

One of the issues with the Crossfire is that the CG is too low for maximum transfer. Once people started understnding transfer you began to see cars jaked up in the back and low in the front.

The idea was to maximise the torque arm on launch so the car would initially rotate on the back axle and raise the front do the car was level (maximum weight transfer while using 90-10 shocks to keep the front trires on the ground and avoid a red light.

Toward the end of the 60s, really fast cars look twisted and tilted at rest but off the line everything would straigten out and go in a straight line despite having no weight on the front tires for the first 100 yards or so.

So yes, the Crossie is at a disadvantage in weght transfer compared to the taller BMW and that is critical when all you care about is straight line acceleration from a stop. The dynamics are entirely different from road racing with a rolling start.

Trivia: anyone know what the dime was for & what was in the float bowl in a LeMans start ?

 

My 2003 A6 2.7T has a smaller engine than both, but with the stock twin turbos and a chip puts out 318hp. That's stage 1. The stage 3s are up in the 400-500 range. Unfortunately, my little piglet weighs almost two tons so she is not quick, but she is very comfortable cruising at 90+ all day. My stock SRT6 has more than kept even with some Corvettes and a Rousch Mustang. She be fast enough for me as is. :-)

 

Mine is not stock and I have a bumper sticker that says I like Corvettes
they taste like chicken!

 

LMAO! Too funny!




.

 

Ramchargers, 426 wedge.

Back in 1970 there were a could of cars, similar in weight, both made by GM.
1. Car #1 was a Chevelle SS 454 with an LS-5 454 making 450P.
2. Car #2 was a Buick GS with a Stage 1 455 making 360HP. The Buick beat the poor Chevy. Go figure. In fact the Buick was the quickest muscle car motor Trend tested in 1970. That 455 made 510lbs/ft of torque at 2800rpm. I will guess the Chevy made 460lbs/ft at 4000rpm. By the time the Chevelle "turned on" the Buick was long gone" That same year Buick made a Stage 2 that came with the parts in the trunk. the heads alone were nothing short of brilliant. The exhaust port was almost non-existant with VERY short ports emptying into Custom headers as no exhaust manifolds were made for those heads.
Back to the regular stage 1 it came with a rather mild 3.64 rear gear. In the '80's the Buick GS of one Richard Lassiter of Georgia went against many a 426 HEMI MOPAR only to leave the HEMI way back. Torque is what moves the cars. The HEMI's ran 14.0 in most cases with their stock 3.54 gears. Go with a 4.10 or a 4.30 and they had a chance. that year, 1970, the Buick tested by motor Trend ran a 13.38 at 105.xx, not bad for a 4000lb. car.
Many factors come into play as on paper the Chevelle should have crushed the Buick not the other way around.
This why the "tweaked intakes" for our car are worth it, all the low end torque they add. yeah, I'm a Buick guy fom way back. First muscle car was a 1966 Buick Skylark gran Sport with the 401 nailhead motor. Had a 1.87 intake valve and a 1.5" exhaust, less than a Camaro Z-28 with a 302 cube motor that came with 3.73 geaars that were often changed to a 4.10 becuse those motors were not much good under 5000rpm. Enough.

 

I could not persuade my dad (a teacher) to buy a Skylark GS back in '66. He got the plain-jane in white with the Fireball 340 V8. It was probably just as well as I ended up with that car in 1972 (my junior year in college) and with total lack of regard for safety, I would have killed myself if it had any more power. But here's to white 1966 Buick Skylarks!!!

 

In 1970 when I returned from SEA I bought a GS with full gauges (could swap the speedoand the tach) four speed, posi (3.42 12 bolt), power everything, and AC (had to special order) & used to tear up Z28s in autocrosses (same class). Was a real sleeper and the Hurst shifted Muncie was one of the fastest shifting cars I've ever had (3-4 in the Crossie isn't bad but need to use the clutch).

Being a GMI student in Flint I was able to acquire an unchromed front bumper which I had painted body color. One nice car.

Pictured with the other toy - FI split window with funny brakes.