pennetta

M630,

Also you don't use the full power as much as you would think. As a percentage of driving time, I use the full power of the car only less than 1% of the time. For every hour and a half to two hours of driving (let's say 100 minutes), I probably floor it once. Maybe even less than that because the cars are so fast now; you can't floor it for a minutes straight (a quarter mile go by in 13 secs).

sdg1871

Whatever Dinan and other tuners end up doing, I am thinking that some of the tunes will really turn the F10 550 into a rocket with well over 500 bhp. I agree that being one of the early adapters of the tunes could be a little risky.

m630

thanks for all the useful info guys, I know Dinan does their homework, I just think in this case with all the other issues we've seen with the turbo engines, ie the HPFP, there is some cause for concern that problems may occur later rather than sooner...as with the HPFP, im sure the long term testing did not uncover this issue, but we can unfortunately see the results all over the place...the one thing that BMW along with M, and other tuners such as Alpina are doing whenever they increase the turbo power towards the 500hp range is increasing the cooling both via radiators and oil coolers, i just dont trust the water pump to make up for the increased boost.

id probably agree we would not have a problem for the daily grind (at least in NY where it dont get too hot in the summer!), but its on those occasions when we really get on them for more than an hour that Id be concerned, ie our runs to Bear Mtn (oh Scott get ready!) where id spend hours in low gears revving up and down in my M...if this upgrade cannot handle that abuse the way that a factory upgrade can, well then its not worth the risk, as this would be the only time you'd exploit the additionaly power in any case...i dont know what i'll do, i dont like turbo at all, and im not sure how safe it will be to upgrade the turbo engines without specifically addressing the cooling issues...it may just make more sense to again go for the M and be done with it, though id hate to pay for the trunk emblem when the engine is based on the same block as the non-Ms

im lucky i guess in that I have atleast 2 years to watch how this all works out, and see where the M comes out as compared to the non-M TT V8 in the 550 or 650...i know i dont need 600 hp, so the 550/650 would be perfect if i can get them to output around 500hp with a tune, as long as they're reliable...otherwise, i just may hold on the to almighty S85 for the lenght of the extended warranty ...

pennetta

M630,

I appreciate your concerns about heat, but I think the guys at Dinan are more qualified than either you or I about passing judgement that there may be too much heat. Also the HPFP issues are on certain stock cars and has nothing to do with Dinan upgrades.
The reason to go to Dinan is because of the research and the only warranty in the business, including consequential damages.
BMW had a created a tough time for the 550 purchasers even when the 535 was rated at 300 hp. BMW could have gotten more out of the engine but already people (myself included) were questioning why get the 550?
There are a lot of things that are done to keep the engine running at the correct temperature range. Turbo are very simple in their design.

sdg1871

Yes I sure am looking forward to the next Bear Mountain meet. I know I have a good time when my 550 gets 11 mpg for the day. Frankly, an even tougher day for the car is doing the Pa State Route 125 run with its wild mountain hairpins and roller coaster-like stretches. The stress on the car on that road is extreme. Yes due to my love of the meets, I too need a car that can handle getting the crap beat out of it for hours. The 550 can -- so long as you watch the oil level guage because flogging it does burn oil.

C's Bimmer

What I want to know is what the numbers will be on the TT V8 in the X5M. Stock HP is 555HP. Are we talking at least 650 HP with a Dinan Tune? If so, the new M5 is going to be insane!!! I can't wait!

God, my car is so slow now. What a piece of crap.

Munich77

Tuning the 550 i will be insane. Plus, I am guessing that the new M5 will have a larger intercooler etc. So people should be able to put the M5 cooling system and intercooler on the car for an increased safety margin.

sdg1871

My sense from the car mags is that the F10 M5 is likely to offer a tweaked version of the TT V8 currently found in the X5M and X6M. I would expect it to produce somewhere between 570-600 bhp. I think that 650 bhp will be easily achievable with even a mild tune. I bet a more wild tune will produce 700 bhp. No question that the F10 M5 will make the E60 M5 look slow by comparison (especially from off the line as the TT V8 is a torque monster), albeit without the amazing engine sounds of the NA V10. Of course, regardless of the power bump, the E60 M5 will always be faster than most cars on the road, especially sedans.

Munich77

For those of you interested, the attached link includes an interview with someone by Hamann on tuning the TT V8. It looks like that engine will be a tuner darling - Hamann already has a 670 HP package for the X6 M.

http://www.m5board.com/vbulletin/f10...win-turbo.html

sdg1871

Wow.