help with power to wieght etc

[ben_p]

if a clio was 250hp on the standard weight of 1080? ( is that a psh1 weighs? then what power to wieght..


then how many KGs would you need to loose to gain ONE horse power in power to wieght?


oh and you work this out for standard power of 168hp with standard wieght then how many kGs to loose to gain ONE horse power in standard form?

 

[Batman]

here you go ben

http://www.letstorquebhp.com/calculator.asp

im to good to you sun beam

 

[ben_p]

LOL

 

[Batman]

really you need the car weighing 1000kg so every 1bhp you gain is a full 1bhp per tonne

 

[Batman]

look at these estimations!!!!!

Power at Flywheel (BHP) : 310

Weight without Driver (KG) : 850

Power to Weight Ratio (BHP Per Ton) : 370.56

0 - 60 (Secs) : 4.25

0 - 100 (Secs) : 9.63

60 - 100 (Secs) : 5.38

Quarter Mile (Secs) : 12.54

Terminal Speed (MPH) : 114.10

Drag Strip Quarter Mile (Secs) : 12.34

Drag Strip Terminal Speed (MPH) : 116.24

 

[bradfincham]

for the Rush:

Power at Flywheel (BHP) : 275
Weight without Driver (KG) : 515
Power to Weight Ratio (BHP Per Ton) : 542.55
0 - 60 (Secs) : 3.20
0 - 100 (Secs) : 8.09
60 - 100 (Secs) : 4.89
Quarter Mile (Secs) : 11.52
Terminal Speed (MPH) : 119.35
Drag Strip Quarter Mile (Secs) : 11.42
Drag Strip Terminal Speed (MPH) : 120.79


Clio:
Power at Flywheel (BHP) : 178
Weight without Driver (KG) : 1080
Power to Weight Ratio (BHP Per Ton) : 167.46
0 - 60 (Secs) : 6.55
0 - 100 (Secs) : 17.05
60 - 100 (Secs) : 10.51
Quarter Mile (Secs) : 14.97
Terminal Speed (MPH) : 93.68
Drag Strip Quarter Mile (Secs) : 14.77
Drag Strip Terminal Speed (MPH) : 95.33



Caterham:
Power at Flywheel (BHP) : 225
Weight without Driver (KG) : 505
Power to Weight Ratio (BHP Per Ton) : 452.70
0 - 60 (Secs) : 3.34
0 - 100 (Secs) : 8.69
60 - 100 (Secs) : 5.35
Quarter Mile (Secs) : 11.72
Terminal Speed (MPH) : 116.09
Drag Strip Quarter Mile (Secs) : 11.62
Drag Strip Terminal Speed (MPH) : 117.50

 

[psycho]

I think I worked out that for a 182 (1090kg's) you gain the equivelant of 1bhp every 6kg's you reduce the cars weight by.

By removing my rear interior I've saved 27kg's so thats 4.5bhp for free. And with the new 15" TeamDynamics ProRace1's I'll be saving another ~14kg. Just wish we were legaly allowed to change the seats in the Clio's in aus, stupid airbags!

 

[MarkCup]

A standard FF 172 would need 203bhp to get to the bhp/ton ratio my Cup (975 kg + 179 bhp) has :approve:

Weight is the enemy of everything...not just straight-line speed, but fuel economy, tyre and brake wear, handling etc...best thing you can do is remove weight.

 

[Tom]

How the hell did you get a cup to 975kg?
Is that a guess or a weighbridge figure?

Ph1 weighs 1035kg afaik.

The rear seats do not weigh 27.5kg in a 182. Not in a million years.

 

[MarkCup]

It's a guess Tom.

From fully fitted, to this...got to be 46kgs taken from there - the lower seatbelt mountings and speakers alone are almost 5kgs. Then there's the parcel shelf, seats, all the trim, the screws...

 

[Chris n nic]

Rich-D weighed the rears of the 172 Cup i.e parcel shelf, both parts of rear seats, that heavy bar (iso fix?) and boot carpet and it came to 25kgs iirc

Chris

 

[ben_p]

il list what i have removed.

front two seats and runners
Rear Bench and back
all door cards
all 5 seatbelts and mountings -rails etc
roof lining
all grab handles
dash removed and replaced with short carbon fibre one
dash rail (modified lost 2.3 kgs off that)
all piller plastics
door sound proffing
manual windows fitted
manual mirrors fitted
all brackets grinded off (inside)
Battery removed and replaced with race red top
Gear surround
steel bonnet chopped for carbon fibre one
removed PAS
Removed Aircon and pump
Removed 16kgs of heatproof and sound deadening
bulk head lining (this was very very heavy)
Single wiper converison
Air bags removed
OMP ally wheel
inlet manifold
air box
cat replaced with de-cat
acoustic valve
carbon canister
All windows bar the windscreen replaced with super lightweight polly carbs
all alternator brackets etc. just have a volvo alternator and small bracket
wheel replaced with magnisum ones
boot wheel well cut out and steel welded up


what do we think i have saved.

 

[Tom]

200kg ish. maybe more.

 

[ben_p]

there lots of other bits which a t agues is 8kgs worth of bolts, cable, nuts, covers, grommets, air con rad etc

 

[ben_p]

200kg ish. maybe more.

so plus my cage and two carbon fibre seats , all frames etc call it 40kgs back on

=

1035 - 200 = 835 + 40 = 875kgs

----------------------------------
performance from http://www.letstorquebhp.com/calculator.asp

so with 240 bhp n/a =

Power at Flywheel (BHP) : 245Weight without Driver (KG) : 875Power to Weight Ratio (BHP Per Ton) : 284.500 - 60 (Secs) : 4.650 - 100 (Secs) : 11.0660 - 100 (Secs) : 6.40Quarter Mile (Secs) : 13.01Terminal Speed (MPH) : 108.47Drag Strip Quarter Mile (Secs) : 12.81Drag Strip Terminal Speed (MPH) : 110.49








then with the 120 hp shot of N20 (call it 100hp as they never make the book figure)

= 345hp


=


Power at Flywheel (BHP) : 345Weight without Driver (KG) : 875Power to Weight Ratio (BHP Per Ton) : 400.620 - 60 (Secs) : 4.170 - 100 (Secs) : 9.2360 - 100 (Secs) : 5.06Quarter Mile (Secs) : 12.43Terminal Speed (MPH) : 116.03Drag Strip Quarter Mile (Secs) : 12.23Drag Strip Terminal Speed (MPH) : 118.20

 

[mini-valver]

^Providing it's not spinning it's nackers off (which it will).....

 

[ben_p]

LOL

 

[ben_p]

i do hope my gripper diff sorts some of the spin out

 

[Hollister]

The best device for traction control is your right foot mate

 

[foxon]

It's a guess Tom.

From fully fitted, to this...got to be 46kgs taken from there - the lower seatbelt mountings and speakers alone are almost 5kgs. Then there's the parcel shelf, seats, all the trim, the screws...

hav u robbed that picture of me lol :rasp: mine is the same, weighs less n sounds 10 times louder

 

[Batman]

ben your roll cage weighs around 50kg never mind 40kgs for your cage and seats! hence why im going for the 30kg cage and not the 50kg one lol and my seats are about 8kg each, alot lighter then what the originals were plus all mountings for the oe seats

and fred said the cup didnt come with tar liner in it, if you look at mark's cup above you can see tar on the inside panel!

 

[Hollister]

You know there is all tar on the inside of the scuttle aswell?

Are you going to take that out too?

 

[Batman]

You know there is all tar on the inside of the scuttle aswell?

Are you going to take that out too?

scuttle panel? brief explanation of where that is

 

[Tom]

Firewall, behind and infront (depends how you are viewing) of the dash.

 

[Martin]

Would be very tough to get a 172 down to below 850.....you would need to do pretty much everything in the weight saving book! I've dropped my civic from 990 to 820 with only lightweight battery, bit of cutting and polycarbs left to do...might just get below 800.

 

[Hollister]

You know there is all tar on the inside of the scuttle aswell?

Are you going to take that out too?

scuttle panel? brief explanation of where that is

infront of the windscreen, where the washer bottle, wiper motor/arms and aircon/heater fan is.

it is all under there too

 

[Batman]

ohh right i remember now like underneath the wiper arms under the plastic got ya i'll have to have a nosey in there me thinks, and im sure i can get my car down to 850kg's

 

[psycho]

How the hell did you get a cup to 975kg?
Is that a guess or a weighbridge figure?

Ph1 weighs 1035kg afaik.

The rear seats do not weigh 27.5kg in a 182. Not in a million years.

Rear seat backs
Rear cushions
Boot carpet
Tool kit
Parcel tray

All wighed and came to approx 27kg's

 

[ben_p]

cant wait to weigh it!