Power to Weight & Specific Power
General information
Engine Specific Power:
A standard Blade produces around 150bhp per Litre, a Busa produces 140'ish, a mildly modified four pot car engine produces around 90, a very modified four pot car engine produces around 115 and V8's are down around 55! (Lots of potential there then).
|
Just as a comparison: the old 1500cc turbo F1 cars regularly achieved 1000bhp/Litre! |
The Rpw of engine/gearbox combinations would also be interesting... 70Kg @ 220bhp - Turbo Fireblade, 62Kg @ 135bhp - Fireblade, 90Kg @ 180bhp - Dry sumped Busa, 155 Kg @ 180bhp - mildly interfered with Vx/Zetec, 155 Kg @ 230bhp - seriously abused Vx/Zetec and 195 Kg @ 220bhp - very lazy Rover 3.9 V8.
These are the best weights of Vx/Zetec and V8 engine/gearboxes combinations I could find... If you know different: Mail me here.
Engine/Trans Power to Weight ratios:
|
Engine/Ancils./Gearbox |
Total weight (kg) |
Power output (Crank bhp) |
Bhp/Ton |
|
Standard Fireblade |
62 |
135 |
2167 |
|
Turbo Fireblade |
70 |
220 |
3125 |
|
Standard Busa (dry sumped) |
90 |
180 |
1989 |
|
'Mild' tune/standard Vx/Z |
155 (ave.) |
170 |
1090 |
|
'Heavy' tune Vx/Z |
155 (ave.) |
230 |
1475 |
|
Standard 3.9L V8 |
195 (ave.) |
220 |
1125 |
Car Power to Weight ratios:
|
Westy - Engine/Gearbox |
Total weight (kg) |
Power output (Crank bhp) |
Bhp/Ton |
|
Standard Fireblade |
450 |
138 |
307 |
|
Turbo Fireblade |
430(?) |
220 |
510 |
|
Standard Busa (dry sumped) |
480 |
180 |
373 |
|
Standard Blackbird (dry sumped) |
480 |
165 |
342 |
|
Tuned Busa/Blackbird |
480 |
220 |
456 |
|
'Mild' tune/standard Vx/Z |
600 |
170 |
282 |
|
'Heavy' tune Vx/Z |
600 |
230 |
381 |
|
Standard 3.9L V8 |
700 |
220 |
313 |
Using total car wet weight in Tonnes and BHP at the crank/clutch we can find the Rpw for a variety of cars.
(c) 2000 - 2004 J.B.Cobb
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