Why all the "big" turbo kits @ low boost

[Ironsquid]

Originally Posted by stevo585

Ah right your car is the same color as a ZX6r I remember. Cool color. Anyways well share the knowledge? I'm just trying to learn about an FA20 on boost. It apparently doesn't have the lag issues of other subaru (EJ) motors. I get it now.

I'd imagine you need RS3's in 245+ or the like to hook up but would you not have the same issues @ 400-500 whp no matter what tire you use? Ever see a corvette tires yeah they are massive for a reason. My Dad has one and they still can spin.

This is why bigger turbos are better. Make 500 hp gradually with a smooth hp curve so you dont overtake coefficient of friction.

[stevo585]

Makes sense.

[mrk1]

I've heard it explained before as a shove vs a punch. The big turbo being like a shove and the small turbo being like a punch. Both could have the same force behind them but which one hurts more. In that comparison your face is the engine and drivetrain.

[Ironsquid]

Originally Posted by mrk1

I've heard it explained before as a shove vs a punch. The big turbo being like a shove and the small turbo being like a punch. Both could have the same force behind them but which one hurts more. In that comparison your face is the engine and drivetrain.

Depends on how thorny the bush you get shoved into is >.<

[mrk1]

Originally Posted by Ironsquid

Depends on how thorny the bush you get shoved into is >.<

Hahahah

[Deadspool]

Originally Posted by Ironsquid

Depends on how thorny the bush you get shoved into is >.<

Hehehe...


Bush..

[Ironsquid]

Originally Posted by Deadspool

Hehehe...


Bush..

Wouldnt be a car forum without a little bush once in while amirite

[cdrazic93]

Originally Posted by jamesm

Just because a turbo is good for 650whp doesn't mean it isn't great for less than that.

Yes, true. but why buy a more expensive turbo when a smaller turbo will be more than suitable for ones needs? Unless you intend to push more than what the smaller turbo will be able to effectively flow...

[jamesm]

Originally Posted by cdrazic93

I agree, exactly why the 3076 a 500+ hp turbo is a great option, along with the 3582, but do you really need the added top end flow of the 3582 over the 3076, thats what i was getting at. If the end goal is within the flow capablity of the 3076 why buy the 3582? Wouldnt you rather not spend the extra money?

Or would the larger turbo need less boost than the smaller one to make similar hp, less stress on the piston heads...

Because there is no such thing as an end goal.

[Ironsquid]

Originally Posted by cdrazic93

I agree, exactly why the 3076 a 500+ hp turbo is a great option, along with the 3582, but do you really need the added top end flow of the 3582 over the 3076, thats what i was getting at. If the end goal is within the flow capablity of the 3076 why buy the 3582? Wouldnt you rather not spend the extra money?

Or would the larger turbo need less boost than the smaller one to make similar hp, less stress on the piston heads...

The 3582 makes smooth power all the way to redline, no flattening or power taper. I just dont see the hp curve for 3076 still flowingly increasing above 7k. I could be wrong someone get me a dynograph of a 3076 at 14-16 psi.

[Boss Paco]

Power under the curve. Learn it. Love it!

[qtwre]

I love reading you guys talk about these technical topics and I lurk much more than I post.

One thing that is bothering me a bit in this thread is that some people are talking about the slower ramp up in power of a big turbo like it's a feature. I understand that it's better for the drivetrain not to be overcome with power too quickly, but we do have throttles we can modulate and having the option to use power lower in the powerband is arguably better than not.

Other than that, I agree with everything else being said about the benefits of a bigger turbo.

[Ironsquid]

Originally Posted by qtwre

.. I understand that it's better for the drivetrain not to be overcome with power too quickly, but we do have throttles we can modulate and having the option to use power lower in the powerband is arguably better than not ..

You can't possibly know the limits of your drivetrain at any given time and use your foot as a limiter.

I don't think many people understand that power down low actually isn't what you think on a RWD car.

[Sportsguy83]

Originally Posted by Ironsquid

The 3582 makes smooth power all the way to redline, no flattening or power taper. I just dont see the hp curve for 3076 still flowingly increasing above 7k. I could be wrong someone get me a dynograph of a 3076 at 14-16 psi.

I will soon