M3 155mph limiter, is it really there?
Discussion
Are'nt these cars ment to be limited to 155mph?
My M3 has touched an indicated 180 mph so when and where is the limiter?
A friend of mine who has had five previous M3's told me none of his cars were limited to 155,or does this so call limiter apply to 5th gear only? In which case i dont see the point.
Interestingly i drove a super chipped 04 plate M3 cab it it was slower than mine right through the rev range,the owner agreed and was gutted which makes me question the validity of many of these companys that make these 30bhp increase claims with a chip upgrade.
Ps My car is standard and no i was'nt in a 30 zone or even in this country.
My M3 has touched an indicated 180 mph so when and where is the limiter?
A friend of mine who has had five previous M3's told me none of his cars were limited to 155,or does this so call limiter apply to 5th gear only? In which case i dont see the point.
Interestingly i drove a super chipped 04 plate M3 cab it it was slower than mine right through the rev range,the owner agreed and was gutted which makes me question the validity of many of these companys that make these 30bhp increase claims with a chip upgrade.
Ps My car is standard and no i was'nt in a 30 zone or even in this country.
rob05 said:
Are'nt these cars ment to be limited to 155mph?
My M3 has touched an indicated 180 mph so when and where is the limiter?
A friend of mine who has had five previous M3's told me none of his cars were limited to 155,or does this so call limiter apply to 5th gear only? In which case i dont see the point.
Interestingly i drove a super chipped 04 plate M3 cab it it was slower than mine right through the rev range,the owner agreed and was gutted which makes me question the validity of many of these companys that make these 30bhp increase claims with a chip upgrade.
Ps My car is standard and no i was'nt in a 30 zone or even in this country.
My M3 has touched an indicated 180 mph so when and where is the limiter?
A friend of mine who has had five previous M3's told me none of his cars were limited to 155,or does this so call limiter apply to 5th gear only? In which case i dont see the point.
Interestingly i drove a super chipped 04 plate M3 cab it it was slower than mine right through the rev range,the owner agreed and was gutted which makes me question the validity of many of these companys that make these 30bhp increase claims with a chip upgrade.
Ps My car is standard and no i was'nt in a 30 zone or even in this country.
I thought the limiter applied to 6th and not to 5th (wink,wink).
M3 Cabby`s are extremely heavy so not really surprised at the performance gap.
No over reading on my part,ok maybe 178 but thats what it did,i was quite suprised myself to be honest,true mph would have been near the 168-170 mark.Funny thing was i ran out of road and the car had a bit left.Unlike my 911 that felt very scarey this did'nt at all,anyway it was a one off just to see what it could do.
So is the limiter ment to cut in at 155mph in any gear?
So is the limiter ment to cut in at 155mph in any gear?
Edited by rob05 on Monday 10th July 16:41
Well my little e36 will do an indicated 167 in 5th. Never had enough tarmack to take it all the way thou!!
When these were new, if you had a track/race licence BMW would remove this. My car on the otherhand belonged to a BMW director so i guess he had it dissabled.
Edited by m3john on Monday 10th July 17:11
They were both there on my CSL and CS. Both at the same speed as well, 159mph as indicated by Road Angel, either in 5th or 6th Gear. The speedo's read just over 170mph on both cars. I spoke to a Super Chip dealer and he said they normally remove the speed limiter when chipping the car..
It just seems to contradict what my mate says and he's had five,all of his cars went well beyond the 155 limit in 6th and i know for a fact his cars are all standard, he now runs a 996 turbo 450BHP model which i hve been sat in at 195 mph(scarey).I cant be sure my car has'nt been chipped but i would be well suprised if it was.Can we really be both wrong or are the dials just very optistic?
Edited by rob05 on Monday 10th July 17:14
m12_nathan said:
dcb said:
There is a legal requirement to over-read.
Are you sure? I thought the speedo could be up to 10% over but never
under, nothing too say the speedo can't be bang on though.
I phrased that badly. What I should have said was
that a speedo isn't allowed to underread at all.
It is allowed to overread by a few per cent.
In practice, most manufacturers aim for the middle of the band
to prevent normal manufacturing variations making the speedo
illegal.
Nothing to prevent a speedo being bang on, but that would
be at the very edge of the permitted band.
My factory unlimited CSL reached a speed that resulted in the needle leaving the marked speedo. The rev counter at the time read 7400 rpm in 6th. Prior to that I had reached the rev limiter in 5th (which equated to an indicated 178mph) and once into 6th it pulled another 700rpm. Calculating it from the rev counter that 7400rpm in 6th would have equated to 193 mph, but was probably nearer a true 180mph.
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