Some M45 kills!!! I love this car!

[mahmudb]

Owning a 740il and a M45 I can say that the M45 is definitely quicker off the line. But the handling of the Bmw is a little better in my opinion. But I still love my M45. Good job on the kills.

[GJEMD]

last July I kissed 140 mph between Charleston SC and Myrtle Beach SC.Long lonesome costal highway with several 4 mile straightaways.

[szh]

Hi, guys!

It is indeed fun to do high speeds on the M - as long as you do it in safe locations (like Highway 5 in California on weekdays ). I have done so in my previous Q's and the M I now drive.

But, I would like to caution you all bit to be safe:

1. Please make sure that your tires are over-inflated for the run - up to 4 psi higher than normal for any sustained speeds over 100mph and 7 psi higher for speeds over 125 mph. Otherwise, the sidewall flexing and resulting heat build-up can damage the tire sidewalls in a hurry - at those speeds, the resulting accident will be quite fatal!

2. Please never exceed 100mph on any tire that has had a flat or puncture and been patched - the speed rating is instantly lowered on these tires due to the internal patch.

Thanks!

Z

[Mark Linkous]

Hello,Good old Hwy 17. I lived in Charleston for 5 years. That is crazy speed given all the deer. Must have been fun. Crazy, but...Cheers,M.L

[NBP45]

I beat a McLaren F1 with my 2008 M45 Sport...

[nmgoodthing]

Leave your matchbox cars at home.

[Double E]

Thanks Szho...

Thinking back, I've probably flirted with disaster more times than reasonable based on that advice.

I'll take your suggestions under advisement.

I am curious though about the source of that information.... can you give details?

[szh]

Thinking back, I've probably flirted with disaster more times than reasonable based on that advice.

I'll take your suggestions under advisement.

Thanks, and good!

I am curious though about the source of that information.... can you give details?

I have spent time reading about tires and tire technology in the past few years. Many possible locations for similar info. For example, this page will give you some details about increasing tire pressure at high-speeds (although they do not use the same speed/psi increase factors I said - I forget where I got those): http://www.tirerack.com/tires-techpage-1/72.shtml.

The "Year Book" of the Tire and Rim Association here: http://www.us-tra.org/traPubs.html has a lot of good information too. Costs $80 though! Here is the order form: http://www.us-tra.org/document...m.pdf for the Year Book.

Other interesting reads (if you have the time ):

http://www.unece.org/trans/doc...e.pdfh ... le....html

This one shows you why I would avoid Hankook tires:http://a257.g.akamaitech.net/7...6.pdf

The FMVSS No. 109 summarized here (you have to order the standard): http://www.nhtsa.gov/cars/rule...9.htm is the gold standard for what is allowed in the US for car tires.

This is the testing done for 109: http://www.nhtsa.dot.gov/stati...9.pdf. This also sorta shows you why I think that people who do "VIP tire stretches" (either too wide a tire, or too wide a wheel) are idiots and seriously compromising their safety on the road. Bead failure at speed can lead to catastrophic outcomes.

Want more?

Z