can someone throw me a link?

[Brandon83]

I've done a search and I cant find any good discusions on the sc vs tc topics

[T-Punk]

bro, you dont want to start this thread. but here is something i wrote up in another thread to give you some pros and cons and some general knowledge you should have on Force induction as a whole.

ok to start of we will get some physics out of the way. when you compress air it heats up. since turbos and super's basically compress air they also heat the air. now you always want the coolest dense air you can to go to you engine to get the most power and to lower the risk of detination... just trust me you dont want any detination. Now to combat this added heat an intercooler can be used. An intercooler is basically a radiator for air (its like a big heat sink in a way). Now the powerdyne does not come with an intercooler but it is safe to run up to 10psi (from what others using it have said) but it is not as efficient without an intercooler. one guy (greenglow) fitted an intercooler to the powerdyne (it took some work) and it showed pretty decent gains. also i am going to do a little comparison of turbos and supers just for you to refer to. now remember neither is better than the other but they do have different traits. superchargers are run off your serpentine and takes power from your engine to run them (this is refered to as parasidic loss and is part of what lowers your gas mileage when using a supercharger). they offer instant power, biger cams are more pheasable because they do not add backpreasure on your exhaust. now turbos are run off of your exhaust so they dont "take power" to run, but they do add backpressure which makes your engine less efficient. They have what is called a boost threashold which is where they start adding power. this can be good and bad. for one thing when you are just driving around under normal conditions you get about the same gas mileage as you would if you didnt have the turbo, but once you reach that threashold the mileage is greatly reduced. Now the bad side of boost threashold, it adds "lag". in other words when you hit the gas you have to wait for the turbo to come online (around 3000rpm with the turbo kit for our cars). that is about the best comparison i can come up with. you seemed to want to know what all was availible but you also seemed to not really understand it all that much so i was just trying to clear some stuff up for you so you can make the best decision for your needs.

hope that was as much fun for you as it was for me to copy and paste it for you.

[Brandon83]

Thanx much thats just what i needed. ( wasnt trying to start an arguement between the two just wanted to read up on it.)

[Mighty Thor]

Damm T-Punk, that's good.

Gas mileage was good when I got the PD. But when I went with cold plugs it got bad. Not much though.

[T-Punk]

I RULE! :D

[Tiago]

alot of what you said about turbos are only valid points when a system is improperly designed or is using old school technology.

with the newer turbos of today and a good design, there is virtually no problems at all in regards to what you were talking about.

couple of points.

SC, not instant power like people tend to try to believe, its not! it will linearly build power till a certain rpm is reached where it will hit full boost, at 5000+ rpm, now THAT is wwhat I call lag. There are variations of this but Im using examples. Will depend on pulley setup and head unit specs.

Turbos can build boost from early in the rpms, just like SCs do , except the turbo will create boost exponentially, that means taht by 3000 rpm it will already have full boost. Where the SC will take a couple thousand more RPM.

Basically it jsut comes down to design options when picking parts. It can make you or break you. You can make power with both systems. Personal prefference comes into play.

[T-Punk]

Oh, i suck again :(

[Speed]

Originally posted by T-Punk:
Oh, i suck again :(

You suck on ruling?

Or do you rule at sucking?


Kidding of course ;)

[T-Punk]

lol, yeah i deffinately suck at ruling

[HAZ-Matt]

Originally posted by Tiago:
SC, not instant power like people tend to try to believe, its not! it will linearly build power till a certain rpm is reached where it will hit full boost, at 5000+ rpm, now THAT is wwhat I call lag. There are variations of this but Im using examples. Will depend on pulley setup and head unit specs.

Yes if you are talking comparing a belt driven and exhaust driven centrifugal superchargers only. But then again, centrifugals are the only type anybody (besides GM) has managed to mount in these cars.

Turbos can build boost from early in the rpms, just like SCs do , except the turbo will create boost exponentially, that means taht by 3000 rpm it will already have full boost. Where the SC will take a couple thousand more RPM.

They will build boost in a similar manner if we compare boost to compressor RPM ;) The fact that the compressor of the turbo can be regulated "independently" of engine RPM is what gives it a great advantage over a belt driven centrifugal supercharger.

Basically it jsut comes down to design options when picking parts. It can make you or break you. You can make power with both systems. Personal prefference comes into play.

I'd agree, but I would also tend to think that a turbosupercharger is superior to a belt driven centrifugal in every category except for ease/simplicity of installation, or if you want a more gradual torque delivery.

[Mighty Thor]

The smaller the pulley you go on the SC the more immediate the boost is compare to turbo. Powerdyne is more immediate in boost than ATI. All because of the design.

I got 2.9 pulley and you can feel the low end power than when I had 3.1.

Both system are still dependant on the engine's rpm.