De-Limit Top Speed on Z4C

Smartbear · Post by **Smartbear** » Thu Apr 19, 2018 10:30 pm

Mr Tidy wrote: ↑Thu Apr 19, 2018 10:24 pm
skelters wrote: ↑Thu Apr 19, 2018 9:34 pm It is a Coo Pee though so maybe 168mph and that'll be it due to the extra weight with the tin lid, mahoosive hatchback and the rear window!

In that case I wonder why Wiki quotes a 3.0Si E85 as being 1,400 kg, and a 3.0Si E86 as being 1,395 kg? Must be all the metal welded in to make the Roadster less floppy!

Like most things there’s several different answers it seems! This source quotes the roadster being lighter than the coupe

http://www.bmwz4roadster.net/bmw_z4_specifications.htm
Rob

Mr Tidy · Post by **Mr Tidy** » Thu Apr 19, 2018 10:34 pm

Smartbear wrote: ↑Thu Apr 19, 2018 10:30 pm Like most things there’s several different answers it seems! This source quotes the roadster being lighter than the coupe http://www.bmwz4roadster.net/bmw_z4_specifications.htm
Rob

B*gger, had to go and get the BMW brochure out - they ought to know! 3.0Si - Roadster is 1,385 kg and Coupe is 1,395 kg.

Still I'm a lightweight so that should make up the 10 kg difference!

Smartbear · Post by **Smartbear** » Thu Apr 19, 2018 10:50 pm

Mr Tidy wrote: ↑Thu Apr 19, 2018 10:34 pm
Smartbear wrote: ↑Thu Apr 19, 2018 10:30 pm Like most things there’s several different answers it seems! This source quotes the roadster being lighter than the coupe http://www.bmwz4roadster.net/bmw_z4_specifications.htm
Rob
B*gger, had to go and get the BMW brochure out - they ought to know! 3.0Si - Roadster is 1,385 kg and Coupe is 1,395 kg.

Still I'm a lightweight so that should make up the 10 kg difference!

It’s not much difference, I’m sure I’ve had breakfasts that weighed more than that!

Rob

skelters · Post by **skelters** » Thu Apr 19, 2018 10:55 pm

We all know the Hatchback was an afterthought and the Roadster was designed.

skelters · Post by **skelters** » Thu Apr 19, 2018 10:57 pm

And the E89? 3 series in drag!

R60BBA · Post by **R60BBA** » Thu Apr 19, 2018 11:13 pm

hopz121 wrote: ↑Thu Apr 19, 2018 9:00 am I am not sure that it will go much past the 155 to be honest so pretty pointless paying a lot of cash in removing the limiter IMO

Its not like 155 MPH is exactly slow

Also I wouldn't be overly keen to keep the car at 155 for a prolonged period of time.

Just to clarify, I have no intention of keeping the car at top speed for a period of time. 1. I like to look after my engine and 2. I don’t have money to waste on fuel.

De-limiting the car is solely for test purposes. I reckon I wouldn’t need anymore than 3 runs to test the VMAX.

R60BBA · Post by **R60BBA** » Fri Apr 20, 2018 1:51 pm

Beedub wrote: ↑Thu Apr 19, 2018 1:47 pm mine has been de-limitered.

How much did that cost you?

Mr Tidy · Post by **Mr Tidy** » Fri Apr 20, 2018 11:09 pm

skelters wrote: ↑Thu Apr 19, 2018 10:55 pm We all know the Hatchback was an afterthought and the Roadster was designed.

I always understood they were both designed at the same time - still your theory might explain why they did a much better job with the E86.

R60BBA · Post by **R60BBA** » Sun May 13, 2018 12:04 pm

Just a quick one.

I’m currently in Germany at the N24, and whilst I was driving through the destricted zones of the autobahn I decided to test out the top speed of the car.

I only managed 2 runs (due to traffic etc) but the car got up to 160mph on the dash both times and still felt as if it could push on more (but I had to brake).

The sat nav read that the car was doing 158mph so I’m wondering whether the previous owner did indeed derestrict the limiter.

Anyone else tested this? If so what were your results

R60BBA · Post by **R60BBA** » Sun May 13, 2018 12:07 pm

Picture quality isn’t great (I did a video) but here you go

Rich8 · Post by **Rich8** » Sun May 13, 2018 12:23 pm

160 WITH an empty washer bottle!
F@#*ing madman!

Anmarube · Post by **Anmarube** » Sun May 13, 2018 2:23 pm

Awesome pal.

Mr Tidy · Post by **Mr Tidy** » Sun May 13, 2018 6:53 pm

Pedal to the metal - great stuff!

AC5L4T3R · Post by **AC5L4T3R** » Mon May 14, 2018 10:05 am

I live in Germany with my English 2.5i, I've got to 140 before I started shitting it and slowed down. I always picture the worst case Final Destination type scenario when I get to such speeds. I don't think I'd get it much faster though.

ph001 · Post by **ph001** » Tue May 15, 2018 2:56 pm

R60BBA wrote: ↑Sun May 13, 2018 12:04 pm I only managed 2 runs (due to traffic etc) but the car got up to 160mph on the dash both times and still felt as if it could push on more (but I had to brake).

5th or 6th gear?

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