UK TT limited to 165?

[dmad]

Okay, before saying this i know that the speedo is never 'accurate' so could be 10% either way.

Nevertheless....

I was on the track the other day and in a straight line put my foot down and looked how fast she'd go. This is a completely standard UK TT L-reg. I watched the speedo rise to 165 when some kind of limiter kicked in and no more throttle - just started slowing down, i don't think it'd let me accellerate until it came down a bit (i might be mistaken on this point as i was too busy admiring the white dashes turn into one continuous line).

So how come the manual says the top speed on the uk one is 155, yet it easily went faster and is it widely acknowledged that the UK one is limited either on the rev limiter or speed to 165.

I would of expected a limiter to simply cut the power at a certain amount of revs and 'bounce' around the top limit on and off....

[Piran]

have you replaced the speedo dial ?

[Digsy]

I beileve that UK cars are speed limited. 155mph is the usual figure at the wheels but you can expect the speedo to become more and more optimistic the faster you go.

[Keith C]

Indeed. My UK with standard wheels/tyres reads 175 when I'm doing 160 real (tested on an airfield of course ;))

However, the removal of the trac fuse delimits the car. Also has the happy side effect of disabling the traction control...

[dmad]

Okay, so 165 is the pub figure and 155 is the actual. Im assuming 10% either way and that'd be 16.5mph out at 165 which makes about 150 odd at worst.

Still nice to know its got enough whack to go above that if it was derestricted.

Its not something im likely to bother doing again though - just wanted to see what it'd do.

[Gaz Walker]

First time I've heard anyone actually hit the limiter.

Mine never did and I went a fair way past the 155mph mark, on an airfield of course.

Few of the other guys that have done 180+ mph never hit it too.

Strange.

Gaz.

[dmad]

But are you talking UK or jap? Isn't the jap restricted to 125 and therefore a lot more likely to be de-restricted right away (as thats a far more 'attainable' speed).

Im pretty sure the lady who owned it in the whole 5 years before me never got to 155 and neither the people before that probably, so nobody bothered to remove the limiter....

[suprarob]

so without the limiter how fast does a standard uk car go?

[Usmann A]

Heard of decatted & induction supra going 175!?
That must be wrong..but this was up in Scotland,roads are lovely...if they was enough road could this be possible?

[Barry]

Originally posted by dmad
But are you talking UK or jap? Isn't the jap restricted to 125 and therefore a lot more likely to be de-restricted right away (as thats a far more 'attainable' speed).


The J-specs are actually limited to 112mph. :(

[GavinL]

Originally posted by suprarob
so without the limiter how fast does a standard uk car go?

Stated by "Toyota" 155mph restricted 180mph derestricted