Quote:
Originally Posted by Dalko43
While you may have gotten increased horsepower with the JB4 and catless dp's, whether or not its better performance depends on what your goals are. If you want a horsepower increase without worrying about long-term engine reliability or CO2 emission standards...then go ahead and mod away on the 1M.
If you want to drive the next 50-60k miles without worrying about grenading your engine or failing emissions testing, then the m4 would be a better option.
I also think that selling your 1M, at a premium, and buying a M4 or M3 would make more financial sense than continuing to mod what is inherently a car with less performance.
I misspoke. The S55 has wet sump lubrication...so does the N55 which it is based off of. But according to the tech documents, the S55's oil lubrication is much more developed and optimized for track use, much more so than what the N55 (modified pendulum slide oil pump, 18% increase oil delivery, secondary oil pump, ect.).
Also, where did you read that the M4's camber can't be adjusted?
Correction: The M4 is not a dedicated track car, like the 911 gt3 or Z06, but it was built with track use in mind. Yes it does share many engine components with the N55 and N54, but it also has increased oil lubrication, increased cooling, a 2nd turbo, reinforced internals, ect.
By comparison, the only difference between the 1M's N54 and a regular E9X 335i's N54 is that the 1M received a tune and a secondary radiator and oil cooling unit. The N54 was not designed with track use in mind. Rather after BMW saw the cooling problems in the early N54 engines, they incorporated the additional cooling as a quick "fix."
The S55 is an engine suited for track work, the N54 needs a bit more work and mods to keep it track worthy.
Okay, before you start making baseless claims, can you please provide a link that shows the M4 can't adjust its camber. Can you provide a link that shows this guy destroying his tires after 3 days of VIR. We are trying to have an honest conversation about the 1M vs the M4, not start a flame war.
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Not making claims at all, look over in the track section and speak to a BMW tech.
http://f80.bimmerpost.com/forums/sho....php?t=1019314
So far as the N54 vs S55 on track we know nothing of the S55's longevity yet but with proper cooling they should both be very similar. Not knocking the M4 , at all its a better car than the 1M , its just not really close to being track ready either. That is not BMW's focus anymore unfortunately. My friend just ran a 2:09 on the VIR full course on stock brakes and PSS tires in his bone stock C7 Z51 vette. Another member just posted his best time of 2:15 on the VIR full course with 275 square RA1's and aftermarket pads on a M4. The C7 is a track ready car including a fully adjustable front and rear suspension , the M4 is a great street car that you can take to the track. The advantage of the 1m currently if you want a modern BMW track car is it has a ton of aftermarket parts to make it seriously track capable.