[staticx313]

Originally Posted by Hank__Scorpio

The turbo will have a higher top end HP, the SC will have more torque.

The way I was taught to understand the difference is this. If two hypothetical identical cars running the same boost for a 1/4 mi but one had a SC the other had a turbo, the SC would win. Because the turbo would have to spin up but the SC would have more immediate power. If it were a mile long race the turbo would win because they are much more efficient at top end. They both have their plusses and minuses. I just like to keep my options open.

I dont see why that would be tho considering at the same boost and levels the turbocharged car would have more power then the supercharged (as the SC steals hp and the TC converts wasted energy into usable energy)... the only difference is in the lag, but like stated it would be very difficult to put that in a hypothetical situation. A 200hp NA car with a s/c lets say gets 250hp from the s/c(a 30-50hp increase across the board wooo) and the same 200hp NA car with a t/c gets 300hp with that same setup (because its not using any hp up to run it, its just converting). Which would be better? In reality the t/c (when used in exact comparison) will ALWAYS make more power, as it doesnt steal power to work, it just converts wasted energy. The only difference is the lag, but in most cases a lag of 2000-3000rpm wont make enough of a difference to matter. Specially if you can launch the cars in the race ( to where you're always in boost anyways from the get - go). So... as stated there are too many different things that can be put into play to go one way or the other so... just leave it at that s/c and t/c both have their + and -.

Robert~

[Guru]

Actually turbo wil make more power than SC at same boost pressure if the turbine is properly matched. Turbo does not have parasitic drag like the SC and is also internally more efficient. Lastly, it has more torque and usually soner so you'll find that between an SC and a turbo car that make the same whp the turbo car will almost always be faster. There's a reason there are almost no Japanese SC cars out there. Just for reference I made 312 ft lbs of torque at the wheel with stock turbo and stock exhaust. Only a few minor modifications on the STi. We will have our GT35R turbo on the STi in a few weeks. Hopefully we wil have positive results.

[Hank__Scorpio]

IRT Guru

I know turbos are more efficient, I even stated it myself.

But here's a question for you to chew on: If turbos have more torque and they get it quicker than a supercharger, why would top fuel draggers use S/C?

IRT eatV8

I've read some independant dyno charts and they claim around 274 ft-lbs. I'd trust them more than the manufacturers numbers until I personally find out otherwise.

[gforced]

One is a claim to the wheels (274 ft/lbs) and the other is at the crank (300 ft/lbs).

[slvrphish]

Just out of curiosity Hank. What is it that you studying?

[Hank__Scorpio]

Originally Posted by slvrphish

Just out of curiosity Hank. What is it that you studying?

Mechanical Engineering 8)

insert joke here

[staticx313]

Originally Posted by Hank__Scorpio

IRT Guru
But here's a question for you to chew on: If turbos have more torque and they get it quicker than a supercharger, why would top fuel draggers use S/C?

because their 1/4 is 2 seconds long? lol maybe theres just not a turbo out their powerful/efficient enough to handle the 5000hp and such, i honestly dont know... maybe someone has a definite answer for this. (also using something that is as far opposite of street/road racing as that would not be a good thing to base your opinion/facts on). They also rebuild their engines after every run and run on nitro.. maybe we should do that too?

Robert~

also have you been in a s/c and a t/c car? I have and theres no way I would take a s/c over a t/c for any reason. I love the feel of a t/c x times more then a s/c, but I guess thats just my preference.

[CloNeGTS]

I think this topic has just about lived out its usefulness.