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Power to weight - performance calculator



 
 
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  #11 (permalink)  
Old July 20th 08, 04:46 PM posted to uk.rec.cars.modifications
PCPaul
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Posts: 490
Default Power to weight - performance calculator

On Sun, 20 Jul 2008 17:35:46 +0100, Douglas Payne wrote:

I've never measured any of these in my own car, but I did re-paint my
wiper arms satin black today.


Is *everybody* uber-detailing this weekend or what??

I'm gonna have to go and wipe the bird crap off my sunroof at this rate.
Ads
  #12 (permalink)  
Old July 20th 08, 04:53 PM posted to uk.rec.cars.modifications
Burgerman
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Posts: 2,632
Default Power to weight - performance calculator

"Tony (UncleFista)" wrote in message
...

"Bob Sherunckle" wrote in message
...
In time honoured fashion, your turn.


Xantia
Errr, computer says no.

Locost
Power at Flywheel (BHP) : 115
Weight without Driver (KG) : 570[1]
Power to Weight Ratio (BHP Per Ton) : 204.99
0 - 60 (Secs) : 5.39
0 - 100 (Secs) : 14.96
60 - 100 (Secs) : 9.57
Quarter Mile (Secs) : 13.88
Terminal Speed (MPH) : 96.31
Drag Strip Quarter Mile (Secs) : 13.78
Drag Strip Terminal Speed (MPH) : 97.46

Seems a bit optimistic TBH

[1] Was 620kgs wet with driver at SVA, so minus 80kgs for the driver, but
it now has 5-speed 'box and zetec so add 50kgs.



What motor?


  #13 (permalink)  
Old July 20th 08, 04:58 PM posted to uk.rec.cars.modifications
Tony \(UncleFista\)
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Posts: 147
Default Power to weight - performance calculator


"Burgerman" wrote in message
...
What motor?


1.8 Zetec on a type9, I'm just guessing the bhp it's a stock 1.8 on
CBR600 carbs soo, what do you reckon ?

  #14 (permalink)  
Old July 20th 08, 05:06 PM posted to uk.rec.cars.modifications
Burgerman
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Posts: 2,632
Default Power to weight - performance calculator

"Tony (UncleFista)" wrote in message
...

"Burgerman" wrote in message
...
What motor?


1.8 Zetec on a type9, I'm just guessing the bhp it's a stock 1.8 on
CBR600 carbs soo, what do you reckon ?




A bit less I would have though.

But without a dyno who knows.

Do the figures backwards until it matches the real standing quarter then you
should have a rough idea?

It wont be very accurate though because I have a bunch of real figures here
(standing quarters@mph from long marston, pod, york, and dyno figures) for a
bunch of vehicles I ran over the years. Some are about right. The rest are
are quite fast or really slow! It doesent seem to allow for traction (lack
of) other than front/rear drive, or differences in drag etc. Or the fact
that you cant use full throttle for the first 1/8th on some really fast
stuff... Seems ok on regular shaped relatively low powered cars.


  #15 (permalink)  
Old July 20th 08, 05:14 PM posted to uk.rec.cars.modifications
Tony \(UncleFista\)
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Posts: 147
Default Power to weight - performance calculator


"Burgerman" wrote in message
...
A bit less I would have though.


Bugger, looks like I was bragging now, I prefer to look clueless

But without a dyno who knows.

Do the figures backwards until it matches the real standing quarter then
you should have a rough idea?


I'm looking for a bit of software for WindowsCE (my satnav) that measures
quarter-mile, 0-60 etc. called "MoreRevs" or summat, or some other software
if anyone knows of any ? I'm not trying to do a 0-60 dash with a stopwatch
in my hand.

It wont be very accurate though because I have a bunch of real figures
here (standing quarters@mph from long marston, pod, york, and dyno
figures) for a bunch of vehicles I ran over the years. Some are about
right. The rest are are quite fast or really slow! It doesent seem to
allow for traction (lack of) other than front/rear drive, or differences
in drag etc. Or the fact that you cant use full throttle for the first
1/8th on some really fast stuff... Seems ok on regular shaped relatively
low powered cars.


Never thought of that, it spins the wheels pretty easily in the lower gears,
so in Real Life it's bound to be a fair bit slower...

Anyway, it's all academic at the moment, needs fixing. ;(


--

Tony Bond / UncleFista

www.bradford7.co.uk

Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...

  #16 (permalink)  
Old July 20th 08, 05:34 PM posted to uk.rec.cars.modifications
Peter Hill
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Posts: 1,467
Default Power to weight - performance calculator

On Sun, 20 Jul 2008 15:30:51 +0100, Pete M
wrote:



Range Rover Turbo

Power at Flywheel (BHP) : 300
Weight without Driver (KG) : 1975
Power to Weight Ratio (BHP Per Ton) : 154.34
0 - 60 (Secs) : 7.04
0 - 100 (Secs) : 19.32
60 - 100 (Secs) : 12.28
Quarter Mile (Secs) : 15.74
Terminal Speed (MPH) : 90.26
Drag Strip Quarter Mile (Secs) : 15.34
Drag Strip Terminal Speed (MPH) : 92.81


I don't believe that, not in the least, well, not when it comes to the
Rangie anyway.


Will it do 60 in 2nd? If not there is a 2nd gear change to take into
account.
--
Peter Hill
Spamtrap reply domain as per NNTP-Posting-Host in header
Can of worms - what every fisherman wants.
Can of worms - what every PC owner gets!
  #17 (permalink)  
Old July 20th 08, 05:42 PM posted to uk.rec.cars.modifications
Burgerman
external usenet poster
 
Posts: 2,632
Default Power to weight - performance calculator

"Tony (UncleFista)" wrote in message
...

"Burgerman" wrote in message
...
A bit less I would have though.


Bugger, looks like I was bragging now, I prefer to look clueless

But without a dyno who knows.

Do the figures backwards until it matches the real standing quarter then
you should have a rough idea?


I'm looking for a bit of software for WindowsCE (my satnav) that measures
quarter-mile, 0-60 etc. called "MoreRevs" or summat, or some other
software if anyone knows of any ? I'm not trying to do a 0-60 dash with a
stopwatch in my hand.

It wont be very accurate though because I have a bunch of real figures
here (standing quarters@mph from long marston, pod, york, and dyno
figures) for a bunch of vehicles I ran over the years. Some are about
right. The rest are are quite fast or really slow! It doesent seem to
allow for traction (lack of) other than front/rear drive, or differences
in drag etc. Or the fact that you cant use full throttle for the first
1/8th on some really fast stuff... Seems ok on regular shaped relatively
low powered cars.


Never thought of that, it spins the wheels pretty easily in the lower
gears, so in Real Life it's bound to be a fair bit slower...

Anyway, it's all academic at the moment, needs fixing. ;(


--

Tony Bond / UncleFista

www.bradford7.co.uk

Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...



Years ago I used a thing called a Vericom dash computer.

http://www.vericomcomputers.com/

It relies only on a bunch of solid state accelerometers.
It was big and heavy and cost loads, it plugged into a fag lighter socket
and stuck on the screen.
This was 1988 or something.
It gave max acc G force and 0 to 60, 100, standing quarter, etc etc. And max
braking and cornering G force.
It also told you your v max.

It was accurate to a bunch of decimal places.
It was as accurate as the timing lights/beams that PB used to speed trap
bikes at bruntingthorpe and as good as the timing beams at santa pod etc.

Trevor Langfield (Highpower Nitrous) used one (his own) outside his place on
the road in doncaster to test my V8 nitrous sierra for fun to see what it
did. On remoulds.

It did (with 70 extra Nitrous and a bluprinted stock P6 10.5 to 1 V8 and 5
speed box):
0.82g on launch (better weight transfer due to **** sloppy suspension!
4.7 to 60
forgot the 100 time
and 14.1 to 1/4 mile at 110.something

Later with bigger nitrous jets it said 13.67 secs

That was almost exactly what the santa pod timing lights said too a week
later.

(And nothing like that web page said it should do!)

You can now get tiny cheap versions from places like
http://www.gtechpro.com/prod.html which are a bit micky mouse and fiddley
so use but supposedly equally accurate. WWW.TURBOBITS.CO.UK sell them, or
at least he sent me one to play with!

Extremely useful for tuning everything from suspention to engines...



  #18 (permalink)  
Old July 20th 08, 06:33 PM posted to uk.rec.cars.modifications
Peter Hill
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Posts: 1,467
Default Power to weight - performance calculator

On Sun, 20 Jul 2008 12:51:18 +0100, "Bob Sherunckle"
wrote:

Yeah, yeah, you've all seen it before, put plug the numbers in again and see
what it spits out.

My Golf is so low powered and heavy that it falls off the bottom of the
chart, so I added some power and took some weight off. ( added 3bhp, took
off 40kg)

The numbers actually seem quite accurate. Golf Ragtop - as slow as a week in
the jail. Zzzzzzzzzz......

Power at Flywheel (BHP) : 104
Weight without Driver (KG) : 1110
Power to Weight Ratio (BHP Per Ton) : 95.20
0 - 60 (Secs) : 10.83
0 - 100 (Secs) : 36.93
60 - 100 (Secs) : 26.10
Quarter Mile (Secs) : 19.32
Terminal Speed (MPH) : 72.34
Drag Strip Quarter Mile (Secs) : 19.12
Drag Strip Terminal Speed (MPH) : 73.53



Then I put the numbers in for the Sylva - these are much more accurate.
Very accurate actually. Woohoo !!

Power at Flywheel (BHP) : 137
Weight without Driver (KG) : 550
Power to Weight Ratio (BHP Per Ton) : 253.09
0 - 60 (Secs) : 4.58
0 - 100 (Secs) : 12.38
60 - 100 (Secs) : 7.80
Quarter Mile (Secs) : 13.05
Terminal Speed (MPH) : 102.65
Drag Strip Quarter Mile (Secs) : 12.95
Drag Strip Terminal Speed (MPH) : 103.89



In time honoured fashion, your turn.

200SX RS13U
Power at Flywheel (BHP) : 169
Weight without Driver (KG) : 1190
Power to Weight Ratio (BHP Per Ton) : 144.30
0 - 60 (Secs) : 7.29
0 - 100 (Secs) : 20.56
60 - 100 (Secs) : 13.27
Quarter Mile (Secs) : 15.72
Terminal Speed (MPH) : 87.44
Drag Strip Quarter Mile (Secs) : 15.62
Drag Strip Terminal Speed (MPH) : 88.45
Brochure says 0-60mph 7.2sec but some car mag tested at 6.9sec.

but I've got about +10% thanks to a 3" drainpipe and +2psi.
Power at Flywheel (BHP) : 185
Weight without Driver (KG) : 1190
Power to Weight Ratio (BHP Per Ton) : 157.96
0 - 60 (Secs) : 6.73
0 - 100 (Secs) : 18.30
60 - 100 (Secs) : 11.58
Quarter Mile (Secs) : 15.14
Terminal Speed (MPH) : 90.95
Drag Strip Quarter Mile (Secs) : 15.04
Drag Strip Terminal Speed (MPH) : 91.99

Stage 1 is 3" drainpipe, 1bar boost, chip, fuel pump.
Power at Flywheel (BHP) : 210
Weight without Driver (KG) : 1190
Power to Weight Ratio (BHP Per Ton) : 179.30
0 - 60 (Secs) : 6.03
0 - 100 (Secs) : 15.70
60 - 100 (Secs) : 9.67
Quarter Mile (Secs) : 14.42
Terminal Speed (MPH) : 95.82
Drag Strip Quarter Mile (Secs) : 14.32
Drag Strip Terminal Speed (MPH) : 96.92

Stage 2+ is T28 turbo + FMIC
Power at Flywheel (BHP) : 250
Weight without Driver (KG) : 1190
Power to Weight Ratio (BHP Per Ton) : 213.46
0 - 60 (Secs) : 5.22
0 - 100 (Secs) : 12.94
60 - 100 (Secs) : 7.72
Quarter Mile (Secs) : 13.57
Terminal Speed (MPH) : 102.39
Drag Strip Quarter Mile (Secs) : 13.47
Drag Strip Terminal Speed (MPH) : 103.57

Stage 3 is Z32 AFM and 444cc/min injectors, still stock internals
Power at Flywheel (BHP) : 300
Weight without Driver (KG) : 1190
Power to Weight Ratio (BHP Per Ton) : 256.15
0 - 60 (Secs) : 4.54
0 - 100 (Secs) : 10.80
60 - 100 (Secs) : 6.26
Quarter Mile (Secs) : 12.84
Terminal Speed (MPH) : 109.04
Drag Strip Quarter Mile (Secs) : 12.74
Drag Strip Terminal Speed (MPH) : 110.30

Good ones with forged rods and pistons, vernier cam sprockets, cams,
tube mainfolds, huge turbo etc hit 550ishbhp. Stripped with cage under
1100Kg is possible (one person has a 1000Kg target - plastic windows,
lots of carbon).
Power at Flywheel (BHP) : 550
Weight without Driver (KG) : 1100
Power to Weight Ratio (BHP Per Ton) : 508.03
0 - 60 (Secs) : 3.24
0 - 100 (Secs) : 6.69
60 - 100 (Secs) : 3.46
Quarter Mile (Secs) : 11.29
Terminal Speed (MPH) : 129.85
Drag Strip Quarter Mile (Secs) : 11.19
Drag Strip Terminal Speed (MPH) : 131.33

Bigtone is running 720bhp (think it's stroked to 2L) 10.85 @ 136mph,
should get better.
Power at Flywheel (BHP) : 720
Weight without Driver (KG) : 1100
Power to Weight Ratio (BHP Per Ton) : 665.05
0 - 60 (Secs) : 2.85
0 - 100 (Secs) : 5.49
60 - 100 (Secs) : 2.64
Quarter Mile (Secs) : 10.70
Terminal Speed (MPH) : 141.04
Drag Strip Quarter Mile (Secs) : 10.60
Drag Strip Terminal Speed (MPH) : 142.64
--
Peter Hill
Spamtrap reply domain as per NNTP-Posting-Host in header
Can of worms - what every fisherman wants.
Can of worms - what every PC owner gets!
  #19 (permalink)  
Old July 20th 08, 06:37 PM posted to uk.rec.cars.modifications
Abo
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Posts: 1,806
Default Power to weight - performance calculator

Bob Sherunckle wrote:

In time honoured fashion, your turn.


The 306 (45 kg taken off from somewhere lol)

Power at Flywheel (BHP) : 95
Weight without Driver (KG) : 1015
Power to Weight Ratio (BHP Per Ton) : 95.10
0 - 60 (Secs) : 10.85
0 - 100 (Secs) : 37.36
60 - 100 (Secs) : 26.51
Quarter Mile (Secs) : 19.35
Terminal Speed (MPH) : 71.97
Drag Strip Quarter Mile (Secs) : 19.15
Drag Strip Terminal Speed (MPH) : 73.16

--
Abo
  #20 (permalink)  
Old July 20th 08, 06:59 PM posted to uk.rec.cars.modifications
Abo
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Posts: 1,806
Default Power to weight - performance calculator

Abo wrote:
Bob Sherunckle wrote:

In time honoured fashion, your turn.


The 306 (45 kg taken off from somewhere lol)

Power at Flywheel (BHP) : 95
Weight without Driver (KG) : 1015
Power to Weight Ratio (BHP Per Ton) : 95.10
0 - 60 (Secs) : 10.85
0 - 100 (Secs) : 37.36
60 - 100 (Secs) : 26.51
Quarter Mile (Secs) : 19.35
Terminal Speed (MPH) : 71.97
Drag Strip Quarter Mile (Secs) : 19.15
Drag Strip Terminal Speed (MPH) : 73.16


Hmm, here is the Vectra:

Power at Flywheel (BHP) : 150
Weight without Driver (KG) : 1504
Power to Weight Ratio (BHP Per Ton) : 101.34
0 - 60 (Secs) : 10.17
0 - 100 (Secs) : 32.08
60 - 100 (Secs) : 21.91
Quarter Mile (Secs) : 18.62
Terminal Speed (MPH) : 76.19
Drag Strip Quarter Mile (Secs) : 18.42
Drag Strip Terminal Speed (MPH) : 77.43

--
Abo
 




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