30-70 thread

eidolon · 18 Jul 2007 at 18:08

Aren't speedos generally around 10% out at 70mph? My TomTom seems to indicate that on most cars that I've tried it with.

Maybe those using a speedo should do a 33-77mph

bobert50 · 18 Jul 2007 at 18:18

eidolon said:
Aren't speedos generally around 10% out at 70mph? My TomTom seems to indicate that on most cars that I've tried it with.

Maybe those using a speedo should do a 33-77mph

i agree but maybe 33-75

prayman · 18 Jul 2007 at 18:34

Gave this a few attempts on the way home, using a stopwatch I got an average of 4.6, using the speedo & going up to 75.

Not the most accurate way to meaasure though, so could be completely wrong. Will give it a go later with a video once I've sorted out a safe way to put the phone so it can see the speedo!

oh yeah, 2006 BMW Z4M btw... Tried looking it up on autocar's site for the official figure, but couldn't see one? Fox, or anyone with Autocar, is it listed?

Lashout_UK · 18 Jul 2007 at 18:35

Added!

iBot · 18 Jul 2007 at 19:04

Do you just floor it in first?

agw_01 · 18 Jul 2007 at 19:08

iBot said:
Do you just floor it in first?

Does your car do 70 in 1st?

prayman · 18 Jul 2007 at 19:10

iBot said:
Do you just floor it in first?

You can yes... depending on the car! I started in second as first would have meant just about an immediate change...

Zip · 18 Jul 2007 at 19:19

prayman said:
You can yes... depending on the car! I started in second as first would have meant just about an immediate change...

Im yet to see a car that can reach 112kph in first.

Apart from maybe gibbos but even then i think he needs to use 2nd

Tax Evader · 18 Jul 2007 at 19:24

Zip said:
Im yet to see a car that can reach 112kph in first.

F40 apparently does.. can't say I've verified it but 1st is long.

Gibbo · 18 Jul 2007 at 19:25

eidolon said:
Aren't speedos generally around 10% out at 70mph? My TomTom seems to indicate that on most cars that I've tried it with.

Maybe those using a speedo should do a 33-77mph

HI there

Unless your car is reasonably new and has an electronic ECU or one where you can adjust the revolutions per mile.

I spent a long time getting my speedo accurate against GPS due to the fact my speedo actually under-read because the US tuners inputted the incorrect wheel/tyre size into my tune. An under-reading speedo is very bad for obvious reasons, thankfully I got it sorted and as such avoided many speeding tickets.

Its now absolutely bob on, to both GPS and what the car should max out in each gearing according to my rear-end axle and wheel/tyre size.

nicRob · 18 Jul 2007 at 19:29

prayman said:
oh yeah, 2006 BMW Z4M btw... Tried looking it up on autocar's site for the official figure, but couldn't see one? Fox, or anyone with Autocar, is it listed?

Found 4.6s as the figure on there, although there is 3 different reviews for Z4Ms...

Had a look at random cars on the autocar website, 30-70 figure for a Caterham 7 R500 is 2.6s :eek:

prayman · 18 Jul 2007 at 19:31

Zip said:
Im yet to see a car that can reach 112kph in first.

Apart from maybe gibbos but even then i think he needs to use 2nd

Well, to be fair he hasn't specifically said car... from what I remember some supersports bikes (gsxr1300 for example) can do a fair bit over that in first!

Gibbo · 18 Jul 2007 at 19:53

Hi there

Here is mine:-
http://media.putfile.com/Saleen-Mustang---30-70mph-acceleration-Takes-28s

Using the online stop watch it comes out between 2.6-2.9s its that quick its a little hard to time.

30-80mph seems to take 3.5s and obviously the acceleration carries on a similar fashion all the way upto 165mph, hence why the only things that have kept up or overtaken have generally been motorbikes.

P.S. Where is a good place to host the file because that putfile website seems crap?

EDIT You tube link:-
http://www.youtube.com/watch?v=5q-PnG_Ig5Y

aztechnology · 18 Jul 2007 at 20:16

Quick aside... as I haven't dropped into motors very often in the last few weeks

I thought that Gibbo had got rid of the Saleen to someone with a first refusal option... did that al go through or did I just dream it?

H'mm that is pretty sharpish.

agw_01 · 18 Jul 2007 at 20:21

Gibbo said:
...

haha

That is nice

Gibbo · 18 Jul 2007 at 20:31

Hi there

High quality download:-
http://www.mediafire.com/?e4syc1myevn

I think I shall have to convince Mr Spie to do similar to see how his compares to the Stang brute power.

panthro · 18 Jul 2007 at 20:49

Gibbo said:
EDIT You tube link:-
http://www.youtube.com/watch?v=5q-PnG_Ig5Y

**** me thats quick.

Zip · 18 Jul 2007 at 21:00

Gibbo said:
Hi there

High quality download:-
http://www.mediafire.com/?e4syc1myevn

I think I shall have to convince Mr Spie to do similar to see how his compares to the Stang brute power.

Hit the rev limiter please

ethos · 18 Jul 2007 at 21:01

Gibbo said:
Hi there

High quality download:-
http://www.mediafire.com/?e4syc1myevn

Lets see some more!

Gibbo · 18 Jul 2007 at 21:03

Zip said:
Hit the rev limiter please

Hi there

Yep I stopped the recording a little short, but limiter is around 82-85mph and it sounds ace on de-acceleration run as get lots of crackling and popping like a TVR, very metallic sound, but very nice.

Shame its going, but at least I know what my next car needs to better.

Will also run the BMW 525i SE next week, now its speedo is out so from a video clip its gonna seem quicker than it is, but hey it will need all the help it can get.