basicaly, the turbo demo car (cant remember whats its called) has 220bhp per tonne or somthing like that yet it can run 13.6 at 108 mph 1/4 mile times. My dad has a kit car with 260bhp and it weighs less than a tonne (876kg) and that runs 13.8 at 101mph. Therefore, they have got it wrong. I just thought i would let everyone know

Quote from tommy10101 :

basicaly, the turbo demo car (cant remember whats its called) has 220bhp per tonne or somthing like that yet it can run 13.6 at 108 mph 1/4 mile times. My dad has a kit car with 260bhp and it weighs less than a tonne (876kg) and that runs 13.8 at 101mph. Therefore, they have got it wrong. I just thought i would let everyone know

What mods do your dad's car have? Is it turbo-charged? Anyway, there are too many factors to affect the quarter mile time.

Yeah, I must agree. Because bph/tonne is the ultimate measure of performance, right? I mean, I know power has more of an effect on your top speed and mass mostly affects acceleration, but still. I really don't know why they don't make car models equivalent to the car's bhp/tonne... that way you could just see that the BMW 230 is faster than the Mercedes 203.

yeh there may be other factors....but 80bhp more per tonne does not equal half a second slower on the strip in any case....they are wrong

Mind you, the XFG you're talking about is tuned for racing.

Quarter miles depend a LOT on the ability to launch, thats why subaru's can get under 13.5's even though they are a 1500kg car with 300 bhp and transmission drag like treacle and aero efficiency of a brick.

PS older style subs are 1300 kg's (thats why they can do quarters in under 13 if up to 300 bhp)

So summary of this chaotic post is if you can get a car to launch superfast and have low trasmission losses and good aero then i cant see anything wrong in a 13.6 for a 2 wheel drive heavish car with 220bhp (although it is very optimistic )

Simon

Gearing? Might be really slow of the line, but get an extra 7mph by the end. Or your Dad might be good off the line, but have a car geared for 200mph (yet only have power for 150).

Therefore, we pronounce you WRONG!

Then he's doing something wrong. No doubt about it. I know many people who can run sub 13.8s in FWD cars with less than 200bhp weighing around a tonne.

Out of interest, what kit is it? That's too heavy for a 7esque kit, but too light for a lot of other kits I can think of,

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

heres mine:

Power at Flywheel (BHP) : 300
Weight without Driver (KG) : 1500
Power to Weight Ratio (BHP Per Ton) : 203.21
0 - 60 (Secs) : 4.93
0 - 100 (Secs) : 12.98
60 - 100 (Secs) : 8.05
Quarter Mile (Secs) : 13.63
Terminal Speed (MPH) : 102.48
Drag Strip Quarter Mile (Secs) : 13.23
Drag Strip Terminal Speed (MPH) : 105.73

thats only a touch of the prodrive official figures (prodrive have a faster 0 - 60 of 4.6) of 13.44

edit:

i put your dads figures in (presuming that its rwd and he is not homer simpson size)

Power at Flywheel (BHP) : 260
Weight without Driver (KG) : 876
Power to Weight Ratio (BHP Per Ton) : 301.57
0 - 60 (Secs) : 4.07
0 - 100 (Secs) : 10.03
60 - 100 (Secs) : 5.96
Quarter Mile (Secs) : 12.41
Terminal Speed (MPH) : 111.22
Drag Strip Quarter Mile (Secs) : 12.31
Drag Strip Terminal Speed (MPH) : 112.53

edit2:

i cant find a 220 bhp car in lfs (looking at official site)

are you talking of the xr gt turbo at 245, anyway heres the figures for it

Power at Flywheel (BHP) : 245
Weight without Driver (KG) : 1224
Power to Weight Ratio (BHP Per Ton) : 203.38
0 - 60 (Secs) : 5.43
0 - 100 (Secs) : 13.55
60 - 100 (Secs) : 8.13
Quarter Mile (Secs) : 13.78
Terminal Speed (MPH) : 100.83
Drag Strip Quarter Mile (Secs) : 13.68
Drag Strip Terminal Speed (MPH) : 101.99

Quote from tommy10101 :

basicaly, the turbo demo car (cant remember whats its called) has 220bhp per tonne or somthing like that yet it can run 13.6 at 108 mph 1/4 mile times. My dad has a kit car with 260bhp and it weighs less than a tonne (876kg) and that runs 13.8 at 101mph. Therefore, they have got it wrong. I just thought i would let everyone know

Man, you are SOOOOOO mis-informed it's untrue, there are a hundred and one more factors that go into 1/4 mile times than bhp/tonne.

Besides, 1/4 mile times aren't really a true representation of performance anyway.

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

fill in the blanks, get the results. anyone know the specs for xrt?

Power at Flywheel (BHP) : 245
Weight without Driver (KG) : 1224
Power to Weight Ratio (BHP Per Ton) : 203.38
0 - 60 (Secs) : 5.43
0 - 100 (Secs) : 13.55
60 - 100 (Secs) : 8.13
Quarter Mile (Secs) : 13.78
Terminal Speed (MPH) : 100.83
Drag Strip Quarter Mile (Secs) : 13.68
Drag Strip Terminal Speed (MPH) : 101.99

Tourq (is that spell'd right) have something to say. Not just hp!

Quote from tommy10101 :

basicaly, the turbo demo car (cant remember whats its called) has 220bhp per tonne or somthing like that yet it can run 13.6 at 108 mph 1/4 mile times. My dad has a kit car with 260bhp and it weighs less than a tonne (876kg) and that runs 13.8 at 101mph. Therefore, they have got it wrong. I just thought i would let everyone know

sounds like your dads the factor tbh. so how do you know how much power your dads car has?

Ever heard of setups?

:feedtroll

Quote from tommy10101 :

basicaly, the turbo demo car (cant remember whats its called) has 220bhp per tonne or somthing like that yet it can run 13.6 at 108 mph 1/4 mile times. My dad has a kit car with 260bhp and it weighs less than a tonne (876kg) and that runs 13.8 at 101mph. Therefore, they have got it wrong. I just thought i would let everyone know

Did your Dad have perfect gearing for a 1/4 mile dash? Does he have the reaction times of a god? Did he have a locked diff and appropriate suspension? What tires was he using and were the pressures set for drag racing? Did he change toe/camber for drag racing? How light is the engine, a light flywheel makes a huge difference? How much lag does the engine have if its turboed? How peaky is the engine, is the 260bhp just on one tiny bit of the torque curve? Was the car traction limited? Were the shifts too slow? Do you want me to keep going?

Quote from andybarsblade :

sounds like your dads the factor tbh. so how do you know how much power your dads car has?

Probably either guesswork, believing the manufacturer figures, or actually think a dyno/rolling road is accurate.

He's probably got ~10% less than he thinks he has, as all rolling roads over-read (it keeps the customers happy).

Tommy10101 has been officially

Quote from tristancliffe :

Probably either guesswork, believing the manufacturer figures, or actually think a dyno/rolling road is accurate.

He's probably got ~10% less than he thinks he has, as all rolling roads over-read (it keeps the customers happy).

this is not directly aimed at him but when most ppl say there car has XXX amount of bhp its normaly guess work, like ive got this car which the manufacturer said had xxx hp when it was built in 1987 but after 200,000 miles ive changed the spark plugs and fitted an induction kit which will suck in nothing but hot air and a big exhaust system so now i have no back pressure, so now its running xxxx hp

Quote from FlintFredstone :

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

heres mine:

Power at Flywheel (BHP) : 300
Weight without Driver (KG) : 1500
Power to Weight Ratio (BHP Per Ton) : 203.21
0 - 60 (Secs) : 4.93
0 - 100 (Secs) : 12.98
60 - 100 (Secs) : 8.05
Quarter Mile (Secs) : 13.63
Terminal Speed (MPH) : 102.48
Drag Strip Quarter Mile (Secs) : 13.23
Drag Strip Terminal Speed (MPH) : 105.73

thats only a touch of the prodrive official figures (prodrive have a faster 0 - 60 of 4.6) of 13.44

edit:

i put your dads figures in (presuming that its rwd and he is not homer simpson size)

Power at Flywheel (BHP) : 260
Weight without Driver (KG) : 876
Power to Weight Ratio (BHP Per Ton) : 301.57
0 - 60 (Secs) : 4.07
0 - 100 (Secs) : 10.03
60 - 100 (Secs) : 5.96
Quarter Mile (Secs) : 12.41
Terminal Speed (MPH) : 111.22
Drag Strip Quarter Mile (Secs) : 12.31
Drag Strip Terminal Speed (MPH) : 112.53

edit2:

i cant find a 220 bhp car in lfs (looking at official site)

are you talking of the xr gt turbo at 245, anyway heres the figures for it

Power at Flywheel (BHP) : 245
Weight without Driver (KG) : 1224
Power to Weight Ratio (BHP Per Ton) : 203.38
0 - 60 (Secs) : 5.43
0 - 100 (Secs) : 13.55
60 - 100 (Secs) : 8.13
Quarter Mile (Secs) : 13.78
Terminal Speed (MPH) : 100.83
Drag Strip Quarter Mile (Secs) : 13.68
Drag Strip Terminal Speed (MPH) : 101.99

What are you trying to say? Your message is unclear.

Quote from danowat :

Tommy10101 has been officially

Self pwnage?



Doesnt load for me

Pffff........(wasn't that funny anyway )

try using "road normal" tyres in LFS

@tommy10101

What did you expect?!? Everyone going "... gee, thanks Tom, I'll shift delete the whole LFS directory right away..." ???

I say you have been comprehensively out-researched. Most Forum regulars know their 5h!t


Squashed!