Turbo Vs NA...

Yes, higher average power. They can have a descending torque curve which provides a higher average power all the way until redline.

Specifically, have you seen the powerband of a 996 Turbo engine? The *power* band is a massive plateau, a very beautiful thing.

 

Isn't lag essentially reduced to nothing in large output engines? I hang out with a bunch of import tuners and they always say[not saying they're always knowledgable] that the typical V8 engine[US 5.7 liter] would have essentially no turbo lag vs their 4 cylinder small displacement engines.

 

I'd imagine that a 2.0L I4 making 400hp would have the same about of lag as a 4.0L V8 making 800hp. This is with similar redlines and a doubled torque curve. However, I'd imagine a 4.0L V8 making 600hp would have less lag.

 

I am big on Turbos....I use to have a 670HP 4 Cylinder Civic. Ran a 11.0@133

Turbo will give you more overall power. To put it on a F Car is hard though being that they have for the most part 11.0-1 compression. It will be prone to detenation. You could put a thicker head gasket on and largewr injectors. It can be done and has been done.

As for surge from Turbo, if you have a LARGE turbo you have to wait for it to spool. My old turbo wouldnt hit boost till 6000 rpm. If you go with like two 18g turbos you wouldnt have that much lag.

Superchargers are cool, they use your crank to make power. I am honestly though all turbo.


Antony

 

Largly depends on the size of the compressor wheel and housing.
If you were to put the same turbo on a 1.8 vs a 5.0 then yes it would spool faster on the 5.0. But at the same time you have to match the size with what your looking for. There is another option and that is ball bearing turbos. they spool a lot faster because of less friction. Then theres Nitrous LOL


Antony

 

You seem to be semi knowledgeable....do you think what I said is true?

 

yes to an extent......depending on the size of the compressor and housing



Antony

 

Yea...what if you assume the flow rate was twice as big....or would you need more info?

 

Are you talking about the CFM?
If so that is in direct corolation with the size of the turbo.

Lets say two cars are using the EXACT same turbo.

The car with the higher displacement will spoll the turbo faster than the smaller. That part we are clear about right?

There are ways to minimize lag...you would do a small exhuast housing and a larger compressor housing. This will allow a faster spool but will still produce a decent amount of CFM. Im not sure if I am anwsering your questions if not please ask me in like a full sentence lol sorry

Antony

 

Yes, I was talking about CFM. I understand completely about the amount of exhaust gases generated increases the spool time of the turbo. I think my specific question is this...If a 4.0L V8 makes 800hp @ 6000rpm and the turbo is flowing optimally at that rpm would a turbo on a 2.0L I4 making 400hp @ 6000rpm have roughly 50% of the CFM or the 4.0L V8 turbo?

 

Ferrari won't make a turbo car because NA power is real power, no offense to turbo owners. NA power is harder to get, you can stick a turbo on a 300hp engine and get 400hp, but a 400hp on its own is much more of an accomplishment.

 

No the CFM may be the same but the power output will not be 50 percent. There are alot of varibles involved. Even in a perfect world it would not be the same. the displacment and the amount of cylinders doesnt make the pwer output range as much as we think. Timing, fuel, cam lift, effecinecy, etc

But to anwser your question, no