BMW 645/630.

BMW 645/630.

Author
Discussion

thegraveltrap

Original Poster:

137 posts

100 months

Thursday 14th January 2016
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So iv been looking into getting a 6 series recently - im told and read that the fueling is marginal at best between the 645 and 630, but the 630 is a better handling car due to not being nose heavy (compared to the v8) but i wonder if that is also marginal and that you would lose out on the v8 sound and performance going of a very marginal difference in handling?

Does anybody know how the 645 performs on track, can it do a cross country trek, enjoy a day out on track and hack it back home happily? From reviews iv read it seems that its capable, also track testing times also seems that its capable in good company...



Your views?

thegraveltrap

Original Poster:

137 posts

100 months

Saturday 16th January 2016
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See the problem is i want it to be able to do a bit of both track driving and touring/weekend drives.

I dont want an out and out stripped track car if i can help it, the lads on babybmw have gave solid reviews on the 130 msport that it can do a bit of everything but then i strayed into looking at the 645/630 as another option. All the reviews im reading are giving it the thumbs up on handling but its better to ask people who own the car.

I dont expect it to set records but just be capable, i had the same sort of response with the 540 e39 when i asked about that everybody telling me its too heavy for a track car.

thegraveltrap

Original Poster:

137 posts

100 months

Sunday 17th January 2016
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you dont need to spend a few thousand upgrading brakes surely if you swap the fluid for racing fluid and fit uprated pads it should do a job?

my mates took his e55 amg on various track days and gets on fine.

thegraveltrap

Original Poster:

137 posts

100 months

Sunday 17th January 2016
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so basically what your saying is, dont bother - its too heavy and the brakes are too st for it to ever do a track day?

thegraveltrap

Original Poster:

137 posts

100 months

Sunday 17th January 2016
quotequote all
Well i have said if i got a 645 i wouldnt want it to be a stripped out trackday only toy, thats my whole point - id like it to be able to go and do a trackday not be embarrassed and then drive me home without the car rattling around my head AKA stripped out tinny trackday car.

It wouldnt spend every other weekend at the track, it would be a "fast road car" mostly with 3/4 trackdays throughout the year thrown in for some fun.

OR i could get a 130i msport and use that but its not as prestige as a 6 series in my opinion and although the 130msport isnt common you see loads of 1 series on the road where as i couldnt tell you the last time i seen a 645.

My other alternative is i can get hold of a 300bhp Mazda Familia GTR, use that for fun in spring/summer and run an oil burner as a daily.

Another option was an E39 540 V8, superb drivers cars but finding a manual is almost impossible now but then would the auto box be ok to do what i want it to do?

How is your auto box on your 645 in sport mode, is it responsive enough to use on a track?

thegraveltrap

Original Poster:

137 posts

100 months

Sunday 17th January 2016
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Pioneer said:
My old 650i is one of the few cars I actually miss. If it's just for fun/tracking and you don't need to think about passengers (esp. kids) then I would only consider that or the M6. You need to decide what's more important to you, mpg or performance. Space-wise it wasn't great in the back for adults. When my middle son was born we pretty much stopped using it as getting a baby seat in was a nightmare, even the official BMW one. Passenger seat right forward so uncomfortable for them as well as having to deal with the very deep bucket seats in the rear with a flat baby seat going on top. In the end it just became a weekend toy which it wasn't quite special enough for. I still miss it though - and I replaced it with a Lambo!



Edited by Pioneer on Sunday 17th January 17:09
The car is going to mostly be used of a weekend the odd time during the week so i can live with the struggle of fitting the babys seat in a few times over the weekend haha.

My question is more based on can i use this car for a few trackdays a year or would i be pissing in the wind using it?

I wanted a car that could do a long trip to the 'ring, do the track and then enjoy the drive home - the occasional weekend blast out to the evo triangle/cat and fiddle road etc thats not going to rattle my brains out like a stripped out track car would.

thegraveltrap

Original Poster:

137 posts

100 months

Sunday 17th January 2016
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Mikeeb said:
Oh they are definitely not a track day toy. But if you're looking for a great GT car that fits 4 proper adults for 360 days of the year with a a few days at the track it's a good shout.
this is exactly it, i dont want it to be a dedicated track day car - if i did i would just buy the 323 GTR that i can get hold of instead of a 645 and run an oil burner alongside it.

Do you know if it would be capable at the track? whats your opinion?

thegraveltrap

Original Poster:

137 posts

100 months

Sunday 17th January 2016
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630Ci 2005-2007 1505 kg (1490 kg)
645Ci 2004-2005 1620 kg (1615 kg)
650i 2006-2007 1645 kg (1640 kg)

They are the weights of each car so they are all below what you expect them to be, i know its not going to be a caterham ffs but im not expecting it to be either lol.

thegraveltrap

Original Poster:

137 posts

100 months

Sunday 17th January 2016
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gareth h said:
I'd say it would be too compromised on track, I've got a 640d and its a big heavy GT, an m3 would be a much better "do any thing" car
yeah but tbh the diesel isnt going to see which way the v8 went is it really? its a total different kettle of fish.

thegraveltrap

Original Poster:

137 posts

100 months

Sunday 17th January 2016
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[quote=(steven)]

A 6 series isn’t going to melt as soon as it goes out on track and there will be some fun to be had, but if you’re really thinking of doing that many track days a year, I would look elsewhere (unless you’ve got deep pockets and are happy to modify).

You will cook your brakes and wear the outside edges of your tyres. You will smash through a set of tyres a year, just because the camber won’t be set up for that kind of abuse.

I used to use my 130i as an occasional trackday car but I soon decided that due to the above reasons, I needed something more focuses and swapped it for an M3.

If you want high speed comfort, the 6 series will do you proud but if you’re going to do more than a handful of trackdays, I would consider something lighter.

[/quote]

Iv been advised to get a 130i msport because it would suit my needs as a car that can do a bit of everything well and be fun/quick on a trackday. Id set whatever car i get up suitably IE racing brake fluid, uprated pads and a proper alignment etc.

If i end up running two cars il be getting this 323 GTR which runs 12.1 seconds 1/4 mile and its AWD, rebuilt gearbox, stripped bare and repainted in pearl white (owners a panelbeater/painter by trade)....