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Author FAO Anyone who knows gear ratios on F20 box
drunkenfool
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Registered: 7th Feb 03
Location: Hereford Drives: Audi R8 V8
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28th Apr 04 at 23:11   View User's Profile U2U Member Reply With Quote

If i had 4900 rpm on the F20 box in 5th with 17s, what sort of speed would i have been going? My speedo cable is broken till tomorrow, just wondering how fast ive been so far!
BabyBlade
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Registered: 5th Feb 03
Location: Hereford Rides: Ninja 600
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28th Apr 04 at 23:17   View User's Profile U2U Member Reply With Quote

get a new cable n ur find out
BeArDy
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Registered: 7th Aug 00
Location: Manchester
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28th Apr 04 at 23:21   View User's Profile U2U Member Reply With Quote

about 100
BeArDy
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Registered: 7th Aug 00
Location: Manchester
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28th Apr 04 at 23:23   View User's Profile U2U Member Reply With Quote

in 5th

2,000 x 2 = 4000 take 2 '00' off = 40mph
3,000 x 2 = 6000 take 2 '00' off = 60mph
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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28th Apr 04 at 23:27   View User's Profile U2U Member Reply With Quote

100 more than that i'dve thought?
drunkenfool
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Registered: 7th Feb 03
Location: Hereford Drives: Audi R8 V8
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28th Apr 04 at 23:28   View User's Profile U2U Member Reply With Quote

seemed a lot more than 100 :S And steve, speedo cable being fixed tomorrow
BeArDy
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Registered: 7th Aug 00
Location: Manchester
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28th Apr 04 at 23:38   View User's Profile U2U Member Reply With Quote

nope really have a look,

5,000 revs x 2 = 10,000 take 2 '00' off = 100mph

trust me on this i have had no speedo for ages so always work on the revs.
a F20 will not let you do say more then about 130
even on redline 6,500 revs x 2 = 13,000 take 2 '00' = 130mph
drunkenfool
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Registered: 7th Feb 03
Location: Hereford Drives: Audi R8 V8
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28th Apr 04 at 23:44   View User's Profile U2U Member Reply With Quote

i had over 130 in the astra on 15s though?
drunkenfool
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Registered: 7th Feb 03
Location: Hereford Drives: Audi R8 V8
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28th Apr 04 at 23:44   View User's Profile U2U Member Reply With Quote

on my driveway of course
BeArDy
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Registered: 7th Aug 00
Location: Manchester
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28th Apr 04 at 23:47   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by drunkenfool
i had over 130 in the astra on 15s though?


maybe on the clock
trust me on this
it luckyB's just over 140 with a 250bhp 2.1 lump with custom final drive on gearbox i can not see a standard Astrawith standard F20 doing anywhere near that

get your speedo fixed and you will see i am right
or go on Mig and they will tell u the same
drunkenfool
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Registered: 7th Feb 03
Location: Hereford Drives: Audi R8 V8
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28th Apr 04 at 23:48   View User's Profile U2U Member Reply With Quote

just read that the book top speed of the GTE is 137. I will get speedo fixed but i still wont trust it cos i know what they are like! Id prefer to take your word for it.
Ian
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Registered: 28th Aug 99
Location: Liverpool
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28th Apr 04 at 23:50   View Garage View User's Profile U2U Member Reply With Quote

It was not much over 100 officer, my dodgy maths tells me so.

drunkenfool
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Registered: 7th Feb 03
Location: Hereford Drives: Audi R8 V8
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28th Apr 04 at 23:52   View User's Profile U2U Member Reply With Quote



Officer: "How fast were you going?"
Me : "About 5,000 rpm in 5th officer"
BeArDy
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28th Apr 04 at 23:59   View User's Profile U2U Member Reply With Quote

well ye
the limiter is around 6,800

So
6,800 x 2 = 13,800 take 2 '00' off = 138mph

which works out max speed
most book values have not been tested its just what it could do

[Edited on 29-04-2004 by BeArDy]
BeArDy
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Registered: 7th Aug 00
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29th Apr 04 at 00:01   View User's Profile U2U Member Reply With Quote

then which means
4,900 x 2 = 9800 take 2 '00' off = 98mph
Fad
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Registered: 1st Feb 01
Location: Dartford Kent Drives: 330cd
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29th Apr 04 at 07:56   View User's Profile U2U Member Reply With Quote

does this work the same for a f16 cos my clocks are hideously out of sync
Pablo
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Registered: 3rd Feb 03
Location: Milton Keynes
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29th Apr 04 at 08:34   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by drunkenfool


Officer: "How fast were you going?"
Me : "About 5,000 rpm in 5th officer"
Tim
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Registered: 21st Apr 00
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29th Apr 04 at 08:48   View Garage View User's Profile U2U Member Reply With Quote

For 195/45/16 (assuming a 3.55 diff...):

Revs 1 2 3 4 5
500 2.8 4.44 6.48 8.56 10.77
1000 5.6 8.88 12.96 17.12 21.55
1500 8.41 13.32 19.44 25.68 32.32
2000 11.21 17.76 25.92 34.25 43.1
2500 14.02 22.2 32.4 42.81 53.87
3000 16.82 26.64 38.88 51.37 64.65
3500 19.62 31.08 45.36 59.94 75.43
4000 22.43 35.52 51.84 68.5 86.2
4500 25.23 39.96 58.32 77.06 96.98
5000 28.04 44.4 64.8 85.63 107.75
5500 30.84 48.84 71.28 94.19 118.53
6000 33.65 53.28 77.76 102.75 129.31
6500 36.45 57.72 84.24 111.31 140.08
7000 39.25 62.16 90.72 119.88 150.86
7500 42.06 66.6 97.2 128.44 161.63
8000 44.86 71.04 103.68 137 172.41

[Edited on 29-04-2004 by Tim]
Fad
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Registered: 1st Feb 01
Location: Dartford Kent Drives: 330cd
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29th Apr 04 at 08:48   View User's Profile U2U Member Reply With Quote

http://82.34.51.160/sytemsandsoftwaredevelopment/systems/sys02.htm

did this to mine running a 20xe f16 box and 195/45/15

revs gear 1st 2nd 3rd 4th 5th

3000 16 26 37 46 62
4000 21 34 50 65 83
5000 26 43 62 81 103
6000 31 51 74 97 124
6750 35 57 84 110 139

drunkenfool
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Registered: 7th Feb 03
Location: Hereford Drives: Audi R8 V8
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30th Apr 04 at 23:23   View User's Profile U2U Member Reply With Quote

2,000 rpm in 5th was almost exactly 50mph not 40 as i expected it was going to be . Havent managed to do 4,900 rpm again cos my mates car wont go that fast
BabyBlade
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Registered: 5th Feb 03
Location: Hereford Rides: Ninja 600
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2nd May 04 at 12:26   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by BeArDy
well ye
the limiter is around 6,800

So
6,800 x 2 = 13,800 take 2 '00' off = 138mph

which works out max speed
most book values have not been tested its just what it could do

[Edited on 29-04-2004 by BeArDy]


You sure 6,800 x 2 isnt 13,600

 
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