ORIGINAL: USAMuscle

Eh, Saleens aren't all about straight line speed either, so comparing them to a GT isn't easy. Saleen Mustangs have a completely redesigned suspension and I guarantee you even if your GT is faster in the 1320 JDan, that Saleen will smoke you on a road course any day of the week. You have to take into account what a car is designed for. A Ferrari F40, which costs what, how many hundreds of thousands of dollars, only runs low 12's in the quarter, but the thing drives like it's on rails.

Here's the details...

Fans are not designed for creating positive pressure. They can only put out 5 to 6 in H20 (.18-.22psi), and are designed to move air from one location to another, not to pressurize it.

OK, lets go with a 2001 Celica GTS for comparison because I'm tired of talking about Honda this and Honda that...

Specs:
Displacement: 1.8 liters (1,796 cc)
Bore x Stroke: 82.0 mm x 85.0 mm
Compression ratio: 11.5:1
Horsepower: 180 hp @ 7,600 rpm
Torque: 130 lb.-ft. @ 6,800 rpm

Now that we have the specs of the motor, lets see how much air it consumes.

v = (pi/4)*(bore)^2*(stroke)*(Ncylce)*(# Cylinders)
v = 3.14/4*(3.228in)^2*(3.346in)*(7600/2)*(4)
v = 416369in^3/min(1ft^3/1728ft^3)
v = 241.0 cfm

Mind you this is 100% VE, so say at a more reasonable 90% that leaves us with:

v = 241.0cfm * 0.9
v = 216.9 cfm actual

Now I am sure you are thinking that the fan is forcing the extra CFM into the motor right? Wrong. The air will actually just pass back between the blades and the housing, providing no aditional CFMs or pressure. Here is the thermodynamic method of finding the power a fan needs to move and slightly compress air (between 0.18-.22psi), but lets say it will magically create 5 psi boost for a "30hp" gain.

Fan air power = w * Ht
Fan air power = (216.9cfm)*(5psi)*(144in^3/1ft^2)(1hp/33000ftlb/min)
Fan air power = 4.7 Hp

4.7hp = 3.5kw of power.
Divide that by 13 volts (average operating battery voltage) and that leaves you with 270 amps of power. It leaves you to wonder if you would need a 270 amp inline fuse for this monster fan. I dunno about you, but I've yet to see anything with a 270 amp fuse in a car. Keep in mind, this is with 100% efficient motor as well, so it would actually have to consume more power than that. But wait....the factory rating on most alternators are around 80-90 amps! Hm, something seems wrong... seems this electric turbo is consuming 3 times as much as the alternator can put out. hmm... odd.

Long story short an electric turbo just won't create more power than what they consume to run them.

ORIGINAL: Dan02GT

JD, you always make references to known quick cars running poor ET's at your track, you talk about poor track prep and weather where you run...you can't really judge a car like that. It's obvious he can't drive and has huge traction problems, I don't understand how you can say it's overrated..

I see LS1's running low 14's at the track, I know about the HP they put down to the crank, I know it's crappy drivers.