Intake manifold

[Nismo_Freak]

How much benefit would such a manifold be over stock?

Say a guy has a T3/T4, is he going from 400HP to 500HP at the same boost level?

What is the actual HP gain and how is it so much better than another few lbs? By the way, manifolds are specifically tuned to the motor based on tubal resonance and many other factors so you would probably have to do a lot of monkying before you get it right.

Like I said, if you want sick power that is a different matter. How much does a good aftermarket one cost?

Because it's engine efficiency.

With an intake manifold properly designed to make power you will see less exhaust backpressure, lower boost temps, greater turbo life, lower oil temps, lower coolant temps, and you can more accurately take advantage of a turbochargers mapping (maps are widest at lower pressures).

It's not about the power, it's about the efficiency and doing it right. You could make 600whp on a stock manifold thats been hogged out, but the powerband will not be ideal, and you will be pushing the turbocharger hard.

[Nismo_Freak]

Oh and you won't look like a complete hackass either... like Brian

[Edub1]

Wow, all that. Well perhaps I spoke too soon. I must admit you have sparked my interest a little.

How much does one of these cost & do you have any data that might demonstrate these things?

[Nismo_Freak]

Wow, all that. Well perhaps I spoke too soon. I must admit you have sparked my interest a little.

How much does one of these cost & do you have any data that might demonstrate these things?

Data? It's all in how volumetric efficiency works.

Here it is plotted out.

Assume an engine VE increase of 5% roughly, and a 0.15 - 0.20 BAR drop in pressure to maintain equal engine flow.



Notice how the green line (with intake manifold) is not only flowing the same amount of air, but the compressor is turning at a slower RPM. This in turn allows the turbine (typically) to be more efficient, reducing backpressure and increasing engine output further.

Reducing the shaft RPM at the turbo will cool the oil temps to a small degree and that will help to reduce coolant temps, as will removing the restrictive passages in the old intake manifold.

Nevermind the fact that it is a lighter manifold with less crap on it and you stand to make more power at the limit since you are at a wider point in the compressor map.

[Edub1]

I see, so I can make the same power with 2-3lbs less boost and all I need to do is replace my intake manifold with a performance one?

How much does one of those cost? Is it a direct fit or will it require a lot of messing around to get everything set up properly?

[Nismo_Freak]

I see, so I can make the same power with 2-3lbs less boost and all I need to do is replace my intake manifold with a performance one?

How much does one of those cost? Is it a direct fit or will it require a lot of messing around to get everything set up properly?

It's typically an item that is beneficial to people that already have KA-T setups and are looking to upgrade further.

The amount of work required to make it work depends solely on you. Where you buy it from, what you buy, and how willing you are to work around things.

[Edub1]

I'm willing to turn my boost controller up 3lbs and spend the rest on lap dances.

Have fun building that manifold. I'll drink a beer for you.

[uvamosk]

YGM!!!!

[Nismo_Freak]

I'm willing to turn my boost controller up 3lbs and spend the rest on lap dances.

Have fun building that manifold. I'll drink a beer for you.

If it wasn't for people that wanted to make things more efficient at the expense of time and research we'd all be running flathead four cylinders that make 20 HP.

[Edub1]

It's all good. I'm just into getting the most bang for my buck. I've have a pontoon boat to re-deck this spring and I just bought a $4,800 set of abs so I've gotta make every dollar count.

[Nismo_Freak]

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