BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      06-01-2013, 09:02 AM   #1
BMhead
New Member
 
BMhead's Avatar
 
Drives: 135i, DCT, Birds B1 Suspension
Join Date: May 2013
Location: Hertfordshire

Posts: 19
iTrader: (0)

Run flats (RFT) vs proper tyres

I'm thinking of getting rid of my RFT's to improve ride handling for my 135i coupe. Currently I'm in Bridgstone 245/35 18 at the back, 215/40 18 at the front.

A few questions;

does it increase your insurance?

I'd really like to use Michelin Pilot Super Sport, but my usual tyre place say they don't make them for 18" rims, anyone know better?

Does anyone have a good expereience of Continental non RFT?

If I stick with RFTs which ones are the most compliant?


what do you reckon?

BMhead is offline   United Kingdom
0
Reply With Quote
      06-04-2013, 10:19 AM   #2
BMhead
New Member
 
BMhead's Avatar
 
Drives: 135i, DCT, Birds B1 Suspension
Join Date: May 2013
Location: Hertfordshire

Posts: 19
iTrader: (0)

I've managed to sort this out now. many thanks to those who helped. I have taken the advice of Birds BMW, who did my suspension upgrade. Kevin Bird said the grip on the Michelin Pilot Super Sport is probably the best out there, you would need to be doing insane speed to loosen it, by which time who knows what would happen? death? Prison? So he suggested the Continental Contact Sport 5 which he uses himself on his heavily modified 130i. Kevin says this is a great level of performance to really enjoy the chassis, especially in the wet when the limits are lower. I've got the tyres on order I'll post how well they work, when I've tried them out.
BMhead is offline   United Kingdom
0
Reply With Quote
      06-20-2013, 01:47 PM   #3
125tel
Registered
 
Drives: bmw 125i
Join Date: May 2013
Location: England

Posts: 4
iTrader: (0)

Im keen to get rid of my run flats and was going to fit michelin ps3 as i haven't seen many recommendations for other tyres .
Im interested in the contis, but am confused as to why you would pick a lesser tyre, surely you want the most grip for your money or am i missing the point completely ?
125tel is offline  
0
Reply With Quote
      06-20-2013, 04:13 PM   #4
T-Dubbs
Private First Class
 
Drives: '08 135i
Join Date: Apr 2012
Location: Calgary,AB/Palm Springs CA

Posts: 150
iTrader: (1)

I'm running 265/35/18, 235/35/18 Hankook v12's.
On stock wheels, just lowered on coils. The car feels so much better than stock sizes.
T-Dubbs is offline   Canada
0
Reply With Quote
      06-21-2013, 07:54 AM   #5
Blake911
Registered
 
Drives: BMW 1 Series Coupe 123D AW
Join Date: Feb 2013
Location: UK

Posts: 3
iTrader: (0)

I second T-Dubbs. I fitted the same Hankooks Ventus V12's around 2 weeks ago and wouldn't go back to RF! The ride is so much nicer, not as harsh when hitting smaller pot holes, obviously try to avoid but on the odd occasion that you can't help it but in general grip feels a lot better in both dry and wet! wet is when i've really noticed it though. Big difference.
Blake911 is offline  
0
Reply With Quote
      06-21-2013, 03:43 PM   #6
125tel
Registered
 
Drives: bmw 125i
Join Date: May 2013
Location: England

Posts: 4
iTrader: (0)

Can i ask how much the Hankooks cost ? My front tyre picked up a nail today, so my rft's are on the way out soon
125tel is offline  
0
Reply With Quote
      06-21-2013, 04:59 PM   #7
bmw1racer
bimmerphile, technogeek
 
bmw1racer's Avatar
 
Drives: 2012 128i Coupe 6MT Sport
Join Date: Jun 2011
Location: SoCal

Posts: 1,945
iTrader: (0)

Garage List
Quote:
Originally Posted by 125tel View Post
Can i ask how much the Hankooks cost ? My front tyre picked up a nail today, so my rft's are on the way out soon
This is here in the States, but it might give you a ballpark: http://www.tirerack.com/tires/tires....s+V12+evo+K110
__________________
bmw1racer is online now   United_States
0
Reply With Quote
      07-07-2013, 02:11 AM   #8
BMhead
New Member
 
BMhead's Avatar
 
Drives: 135i, DCT, Birds B1 Suspension
Join Date: May 2013
Location: Hertfordshire

Posts: 19
iTrader: (0)

Following my earlier post, I've now been living with a full set of Conti Sportcontact 5s for about a month and experienced mixed driving including a track session.

Overall ride quality with the Birds B1 suspension is spot on. Still all the detailed information from the road but no crashing over bumps.

On the limit is so predictable. 100% grip until you get to astonishing high speeds then its clear if you push more you are going to slide, so a nice big warning. Ive not delved into drifiting, but it is good fun just getting familiar with the feel around the limit.
BMhead is offline   United Kingdom
0
Reply With Quote
      07-07-2013, 02:30 AM   #9
GeeRam
Captain
 
GeeRam's Avatar
 
Drives: 135i Coupe
Join Date: Apr 2010
Location: London,UK

Posts: 890
iTrader: (0)

Quote:
Originally Posted by BMhead View Post
Following my earlier post, I've now been living with a full set of Conti Sportcontact 5s for about a month and experienced mixed driving including a track session.

Overall ride quality with the Birds B1 suspension is spot on. Still all the detailed information from the road but no crashing over bumps.

On the limit is so predictable. 100% grip until you get to astonishing high speeds then its clear if you push more you are going to slide, so a nice big warning. Ive not delved into drifiting, but it is good fun just getting familiar with the feel around the limit.
Sounds similar to my findings after having the Birds B1 fitted back in April along with the Pirelli P Zero tyres.
4k miles of road driving plus one track day and car feels now what it should have been from the factory.

(I'm still tempted to have the rear M3 subframe bushes fitted though as there's still that little bit of disconcerting rear end wiggle on occasions)
__________________
2011 135i M-Sport Coupe DCT ~ Bluewater:Coral Red | BMWP CF spoiler & BMWPE | Birds B1 suspension | Forge FMIC | Hartge footrest | Alufelgen CS7 & Pirelli P Zero

2012 Harley Davidson Softail Slim ~ lots of mods
GeeRam is offline   United Kingdom
0
Reply With Quote
      09-01-2013, 03:33 AM   #10
BMhead
New Member
 
BMhead's Avatar
 
Drives: 135i, DCT, Birds B1 Suspension
Join Date: May 2013
Location: Hertfordshire

Posts: 19
iTrader: (0)

Just thought I'd offer an update. Now put around 3000 miles on the Contisport 5 tyres and the Birds B1 suspension is about 4000miles on. The whole car feels really supple and is able to put all its power down, with confidence!

With full traction control, you have to go insanely quick to get the dashboard light to flicker. At this stage I get a very small amount of slip, so it is very stable around the limit.

So my advice is ditch the run flats, get a decent set of sports tyres and change the suspension to something better than teh M Sport set up, then decide if you need a power increase.

I love the idea of more power in theory, but with such a great chasis, suspension, tyre and 300 bhp, I'm struggling to justify further mods.

Cheers
BMhead is offline   United Kingdom
0
Reply With Quote
      09-01-2013, 04:14 AM   #11
GeeRam
Captain
 
GeeRam's Avatar
 
Drives: 135i Coupe
Join Date: Apr 2010
Location: London,UK

Posts: 890
iTrader: (0)

Quote:
Originally Posted by BMhead View Post
I love the idea of more power in theory, but with such a great chasis, suspension, tyre and 300 bhp, I'm struggling to justify further mods.
Likewise.

Although, I would recommend a better intercooler. I've got the Forge Motorsport one and I did find that it improved the throttle response and driveability a little, and it was nice to find that it still felt nice and 'peppy' even in the recent hot spell we've had here.
__________________
2011 135i M-Sport Coupe DCT ~ Bluewater:Coral Red | BMWP CF spoiler & BMWPE | Birds B1 suspension | Forge FMIC | Hartge footrest | Alufelgen CS7 & Pirelli P Zero

2012 Harley Davidson Softail Slim ~ lots of mods
GeeRam is offline   United Kingdom
0
Reply With Quote
      09-24-2013, 02:25 PM   #12
BMhead
New Member
 
BMhead's Avatar
 
Drives: 135i, DCT, Birds B1 Suspension
Join Date: May 2013
Location: Hertfordshire

Posts: 19
iTrader: (0)

That's interesting. Where did you go to get the inercooler done and how much did it cost?

I would be interested in improved throttle response from tickover to about 1300 rpm. Not sure if the sluggishess is down to the ecu map and lack of turbo power or the DCT getting a bit confused. Any thoughts on that?

Does the intercooler help in that range?
BMhead is offline   United Kingdom
0
Reply With Quote
      09-26-2013, 02:56 PM   #13
GeeRam
Captain
 
GeeRam's Avatar
 
Drives: 135i Coupe
Join Date: Apr 2010
Location: London,UK

Posts: 890
iTrader: (0)

Quote:
Originally Posted by BMhead View Post
That's interesting. Where did you go to get the inercooler done and how much did it cost?

I would be interested in improved throttle response from tickover to about 1300 rpm. Not sure if the sluggishess is down to the ecu map and lack of turbo power or the DCT getting a bit confused. Any thoughts on that?

Does the intercooler help in that range?
I had the intercooler supplied and fitted by Forge Motorsports themselves, down in Gloucester and it was about 700 all in fitted.

Not such a huge improvement that far down in the rev range from memory, but, the throttle response improvement was noticable at urban speeds right after leaving Forge to drive home.

Has your car had any engine software updates....?
You might have been 'upgraded' with the newer 'borked' DME....??
__________________
2011 135i M-Sport Coupe DCT ~ Bluewater:Coral Red | BMWP CF spoiler & BMWPE | Birds B1 suspension | Forge FMIC | Hartge footrest | Alufelgen CS7 & Pirelli P Zero

2012 Harley Davidson Softail Slim ~ lots of mods
GeeRam is offline   United Kingdom
0
Reply With Quote
      09-27-2013, 12:22 PM   #14
BMhead
New Member
 
BMhead's Avatar
 
Drives: 135i, DCT, Birds B1 Suspension
Join Date: May 2013
Location: Hertfordshire

Posts: 19
iTrader: (0)

Thanks for your reply. Can't really work out if it is worth 700 to me as I find throttle response is fine, except for the really low rev flat spot.

I have had an upgrade at my BMW main dealer who called me in to get a software upgrade to do with theft security. I guess that's unrelated becuase there has been no change in the low end throttle response.

Ive not had anything else done at my request.

Have you ever had any issue with low end throttle response?
BMhead is offline   United Kingdom
0
Reply With Quote
      09-30-2013, 01:45 AM   #15
GeeRam
Captain
 
GeeRam's Avatar
 
Drives: 135i Coupe
Join Date: Apr 2010
Location: London,UK

Posts: 890
iTrader: (0)

Quote:
Originally Posted by BMhead View Post
Thanks for your reply. Can't really work out if it is worth 700 to me as I find throttle response is fine
It's worth it for the intake temp drop and heat soak reduction etc. Any improvement in throttle response was just a bonus to that from my point of view.

Quote:
Originally Posted by BMhead View Post
I have had an upgrade at my BMW main dealer who called me in to get a software upgrade to do with theft security. I guess that's unrelated becuase there has been no change in the low end throttle response.
Correct, security update was to the CAS not the engine DME.

Quote:
Originally Posted by BMhead View Post
Have you ever had any issue with low end throttle response?
Only the slight hesitation when comeing off the throttle and rolling up to a roundabout and then trying to quickly get back on it if there's a gap appeared.....which is annoying, but I've learnt to accept it tbh.
__________________
2011 135i M-Sport Coupe DCT ~ Bluewater:Coral Red | BMWP CF spoiler & BMWPE | Birds B1 suspension | Forge FMIC | Hartge footrest | Alufelgen CS7 & Pirelli P Zero

2012 Harley Davidson Softail Slim ~ lots of mods
GeeRam is offline   United Kingdom
0
Reply With Quote
      10-10-2013, 03:18 PM   #16
BMhead
New Member
 
BMhead's Avatar
 
Drives: 135i, DCT, Birds B1 Suspension
Join Date: May 2013
Location: Hertfordshire

Posts: 19
iTrader: (0)

Thanks for your reply I appreciate that a better quality intercooler will be more efficient, with in take temp drop etc. but what improvement does this offer in the driving experience? My guess is that you would have to be working the engine very hard in high ambient temps, which are pretty rare driving experiences for me. How are you getting value?

All the best and thanks for your replies
BMhead is offline   United Kingdom
0
Reply With Quote
      10-18-2013, 05:23 AM   #17
GeeRam
Captain
 
GeeRam's Avatar
 
Drives: 135i Coupe
Join Date: Apr 2010
Location: London,UK

Posts: 890
iTrader: (0)

Quote:
Originally Posted by BMhead View Post
Thanks for your reply I appreciate that a better quality intercooler will be more efficient, with in take temp drop etc. but what improvement does this offer in the driving experience?
Err........ not sure I can answer that as I assumed that was somewhat obvious

Quote:
Originally Posted by BMhead View Post
My guess is that you would have to be working the engine very hard in high ambient temps, which are pretty rare driving experiences for me.
Not at all, differences were noticable right across the board not just at the extreme end of the performance envelope (although, it's most noticable there).

Quote:
Originally Posted by BMhead View Post
How are you getting value?
Bigger smiles per miles
__________________
2011 135i M-Sport Coupe DCT ~ Bluewater:Coral Red | BMWP CF spoiler & BMWPE | Birds B1 suspension | Forge FMIC | Hartge footrest | Alufelgen CS7 & Pirelli P Zero

2012 Harley Davidson Softail Slim ~ lots of mods
GeeRam is offline   United Kingdom
0
Reply With Quote
      11-03-2013, 09:25 AM   #18
BMhead
New Member
 
BMhead's Avatar
 
Drives: 135i, DCT, Birds B1 Suspension
Join Date: May 2013
Location: Hertfordshire

Posts: 19
iTrader: (0)

thanks for all your replies. You are clearly getting good value, so I will file this info for when I've saved some more pennies for more upgrading. In the meantime I think its me that needs an upgrade and I am intending to do some more high performance driving training on the road and track, then see where I want to go with the upgrades. The car is pretty awesome as it is. Took it round Rockingham in the damp a few weeks ago, instructor by my side and managed to get around 100mph before the amazing turn 1 banked curve. Equally as satisfying was unwinding lock on the last corner and feeding in to max power allowing it to drift up the banking. Phwoor!
BMhead is offline   United Kingdom
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 09:41 AM.




1addicts
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST