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  #51  
Old 02-20-2018, 11:22 AM
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Quote:
Originally Posted by ard View Post
you are posting testing of two different cars

This is NOT a test of 20s versus non-20s.
Oops it only references the 20s. I'll do some more digging. If an X5M does like .98-g with Adaptive and an 35i Adaptive with only 19s does .87-g, I would think it's safe to assume Adaptive with 20s falls in between both (definitely not less).
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  #52  
Old 02-20-2018, 11:29 AM
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Quote:
Originally Posted by BGM View Post
In some aspects, 20s will not perform better than the 19s because of weight but not in terms of stopping feet and skidpad tests (below). Stopping feet is an every day driving occurrence and so is handling (skidpad more related to higher speeds).

Car and Driver:

X5 non-20s:
Braking, 70-0 mph: 169 ft
Roadholding, 200-ft-dia skidpad: 0.82-g

X5 20s:
Braking, 70-0 mph: 159 ft
Roadholding, 200-ft-dia skidpad:: 0.87-g
These numbers would make sense given that the 20s wear wider rubber, meaning a larger contact patch with the pavement (thereby a higher friction coefficient between the vehicle and the pavement) which will result in better stopping and skid pad performance if everything else is essentially equal.

Also, on a 5000lb vehicle, the effect of the heavier 20s is less than on a lighter vehicle in these types of tests.
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  #53  
Old 02-20-2018, 11:38 AM
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An update on my X5:

My X5 seems to have become lost in repair hell. The shop told me that they had several of their mechanics come down with the flu and were running over a week behind. Ugh. Hope to have it back next week, which will be 3 weeks in the shop.

All is not lost, though:

I had a very gracious friend loan me her 2016 C450 AMG Mercedes while she is out of town on business. It's a pretty sweet ride. It would really be a tough call between the C450 (or C43) and a 340i. The Merc definitely steers and handles better than my recent experience with a 435i, and the interior on the Merc is also a step up in my opinion.
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  #54  
Old 02-20-2018, 01:14 PM
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The 340i is not a 335 or 435. There were numerous differences that addressed the steering feel (or lack thereof). My 340i with MPPSK is definitely a match for the C43
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  #55  
Old 02-20-2018, 02:34 PM
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Originally Posted by blue dragon View Post
My 340i with MPPSK is definitely a match for the C43
Which is exactly the point I was trying to make. They are quite comparable.
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  #56  
Old 02-22-2018, 10:48 PM
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more to come

I just finished valve seals, valley pan, coolant pipe, and water pump on my '07 4.8. I currently have 105K on the truck, but the valve seals starting smoking probably around 75K, so I would factor in a valve seal job into your calcs. I did mine myself, so cost me $560 ($500 for the AGA tool kit, and $60 for the seals), but I've read that indy's are charging around $2500-$3K for valve seal jobs. Also, I've also done gaskets for timing covers, valve covers, alternator, so I think I have all major issues addressed...fingers crossed! If I had to do it over again, I would have bought something else, although the X5 is a wonderful ride when it's not broken.
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  #57  
Old 02-23-2018, 12:12 AM
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I've done much of the same work in the last couple of month and if I had to do it over again, I would have bought this vehicle differently (informed negotiating ), but still would have went for it.

But... I enjoy the DIY and the payoff.
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  #58  
Old 02-23-2018, 09:42 AM
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Pushrod, sorry to hear about your 4.8i wow's.

But this is exactly why I dumped my 2008 X5 4.8i and replaced it with a 2011 X5M with an extended warranty. I managed to spend over 8K in parts/maintenance in 6 months on my 4.8i. I did almost all the work myself and it seemed like every weekend I was working on that car. I will say so far the X5M has been significantly more reliable, and less expensive to maintain. In fact even though my 4.8i was paid for, I was averaging 1300/month in repairs. I have a spreadsheet that tracks costs, but damn, everything broke, sunroof, alternator, pcv, diff seals, suspension, e-brake, thermostat, heater control valve, MAF, etc. My X5M with an extended warranty costs my $435 in payments. It was money saving for me.

Oh my 2008 X5M 4.8i with 96K miles and 0 issues other than bad valve stem seals (which weren't noticeable with ATP-205). I traded mine in march 2017 for 9500. It was a fully loaded X5 4.8i with adaptive drive, multi contour heated and cooled seats, etc. I like the newer X5M but there is an M tax, and oh my goodness are brake pads and tires expensive.
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  #59  
Old 02-23-2018, 07:23 PM
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Time to Cut Bait? (E70 4.8i Issues)

Quote:
Originally Posted by Thecastle View Post
Pushrod, sorry to hear about your 4.8i wow's.

But this is exactly why I dumped my 2008 X5 4.8i and replaced it with a 2011 X5M with an extended warranty. I managed to spend over 8K in parts/maintenance in 6 months on my 4.8i. I did almost all the work myself and it seemed like every weekend I was working on that car. I will say so far the X5M has been significantly more reliable, and less expensive to maintain. In fact even though my 4.8i was paid for, I was averaging 1300/month in repairs. I have a spreadsheet that tracks costs, but damn, everything broke, sunroof, alternator, pcv, diff seals, suspension, e-brake, thermostat, heater control valve, MAF, etc. My X5M with an extended warranty costs my $435 in payments. It was money saving for me.

Oh my 2008 X5M 4.8i with 96K miles and 0 issues other than bad valve stem seals (which weren't noticeable with ATP-205). I traded mine in march 2017 for 9500. It was a fully loaded X5 4.8i with adaptive drive, multi contour heated and cooled seats, etc. I like the newer X5M but there is an M tax, and oh my goodness are brake pads and tires expensive.


Same thing here. Dumped the needy N62 and stayed with the economical X5M. I have paid my N62 dues but will never renew again. Had 3 of them (4.4i, 4.8is and 4.8i). Every one a bit of a disaster in their own way.


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  #60  
Old 02-23-2018, 07:56 PM
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Quote:
Originally Posted by Thecastle View Post
Pushrod, sorry to hear about your 4.8i wow's.

But this is exactly why I dumped my 2008 X5 4.8i and replaced it with a 2011 X5M with an extended warranty. I managed to spend over 8K in parts/maintenance in 6 months on my 4.8i. I did almost all the work myself and it seemed like every weekend I was working on that car. I will say so far the X5M has been significantly more reliable, and less expensive to maintain. In fact even though my 4.8i was paid for, I was averaging 1300/month in repairs. I have a spreadsheet that tracks costs, but damn, everything broke, sunroof, alternator, pcv, diff seals, suspension, e-brake, thermostat, heater control valve, MAF, etc. My X5M with an extended warranty costs my $435 in payments. It was money saving for me.

Oh my 2008 X5M 4.8i with 96K miles and 0 issues other than bad valve stem seals (which weren't noticeable with ATP-205). I traded mine in march 2017 for 9500. It was a fully loaded X5 4.8i with adaptive drive, multi contour heated and cooled seats, etc. I like the newer X5M but there is an M tax, and oh my goodness are brake pads and tires expensive.
I'm confused--you are leaving some information out. How many miles did you have on your '08 4.8? You're only paying $435/month on an '11 X5M--how many miles and what kind of warranty? Even with $9K trade, on a 60 month finance you paid $35K-- you did a 5 year note on a 6 year old car?
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