A buddy of mine and myself have been argueing over the superioty and ultimately the "ethics" if you will, of a twin turbo vs. weiand roots setup. I personally feel that turbo is a step in the direction of what i believe to be a common enemy, ricers, and that turbos just don't have the low end grunt. Water injection and timing retardation just further rices a car i believe. His argument is that weiands will not make the same amount of power and do not have boost controllers. anyhow, tell us what you think in the poll or leave a reply.

 

Try the power adder board.
Daniel

 

yes i am such an idiot, i'm so sorry

 

Turbos are way more efficient. With a belt driven supercharger you are limited to making boost in a linear fashion. On a turbo setup, you can make the boost wherever and whenever you want in your power band (good and bad).

A turbo is using exhaust gases that your engine expells anyway to make boost, it is as close to free horsepower as you can get. Your supercharger is tensioned off the crank and costs you horsepower to turn it.

I think roots blowers look bad *** tho .

If you really want to argue your case, I would research screw style superchargers. Also, you can argue the point of a roots blower adding positive displacement .

 

If you already got headers and a good exhaust system, then you will have to substitute all that out for the turbos and with a blower you can use the exhaust you already have.

 

The question can't be answered. It all depends on your setup and your goals. Give more info about your setup and you'll get better answers.

 

Its an ethical, perfect world situation question, at least that is what I gathered. I think the centrifigal blower is the best of both worlds.

 

Blowers are good for adding low end power but turbos can get you that high rpm pull. Just about any small block has enuf torque to pull off the line. Add a supercharger and you have some major traction problems. Lauch naturaly aspirated and use the turbo for boost later in your run and youll have a dam fast car. I never understand why people put turbos on little 4 bangers that could use a supercharger down low. Or the people with big v8's that that pop on a supercharger and have way to much torque down low and run out of steam on the top end.

 

i'd probably run a high pulley to get my low end grunt I am looking for, with a ton of cam in the top end, should bring a pretty flat torque curve if I am correct

 

Actually, once you get to a 5 liter engine, and larger, turbo lag just isn't a concern. A properly sized turbo system will make more mid range torque and have a broader power band than both the roots and centrifugal superchargers. All things being equal the turbo car will walk the other cars.

Don't use a wild cam with a supercharger. You'll take away the benefit of supercharging. If you want a roots style then contact places like Crower and Comp Cams and take a look at their supercharger specific cams. Turbos seem to work best with basically stock cams. You can get more aggressive with a centrifugal supercharger, but in general the supercharger will add about 1000 rpm to your power band anyway, so don't go nuts with the cam or you won't like driving the car.

 

Not to po anyone, but if turbos are the way to go, why doesn't NHRA top fuel use them?
For ungodly amounts of power anywhere in the rpm range, nothing beats a monstrous roots blower. The power increase overwhelms any loss due to the belt drive (depending on your drive ratio of course). Problem with them is that they can be severely tempermental.
A turbo is a great way to increase power and have a more managable engine, but they do create a restriction in exhaust flow that mimicks the loss of hp due to the supercharger's belt. This has been significantly improved over the years, but its still there.
Bottom line is what do you want the car to do?

 

That's talking apples and oranges. Best thing to do is go out and do your own research. Look at various supercharged and turbo engines of the same type and see what you think. Nobody will take as much interest in answering your question as yourself.

 

reason top fuel doesn't run them, is cause roots is the only forced induction allowed

 

Exactly.

And a turbo's exhaust restriction is no where near what it'd take to spin an equally powering supercharger.

Supercharging a 4 cylinder is sort of stupid. While some cars pull it off, a turbo will outperform an equally powered supercharger.

Another benefit to turbo's is once you are ready to bump the boost, you can do it at the turn of a **** while sitting in the drivers seat. A supercharger you need to change pullies (not the hardest thing in the world but not as easy as turning that ****).

Both are great power adders, but a turbo will outperform an equal supercharger in every scenario (IMO). Sometimes superchargers are a little more cost efficient and much easier to install.