Intake manifold spacers

[Overdrive]

Originally Posted by Tcoat

Yes.
But...
The total of the intake, manifold, exhaust and internal changes in 17 came to a 5HP increase.
Why on earth do people think they are going to get more than that with just some spacers?

Small bit of devil's advocate: Toyobaru is also not going to go and tune the car for everything the could get out of those changes, though. They've still got fuel economy numbers to meet to sell the car.

Don't get me wrong, I'm not gonna be unreasonable. Maybe there's another 5 hp that they left on the table that can be freed up with some more unapologetic tuning, but I doubt the 5 hp they gifted for 2017+ was all there was to get from those changes.

[Tcoat]

Originally Posted by Overdrive

Small bit of devil's advocate: Toyobaru is also not going to go and tune the car for everything the could get out of those changes, though. They've still got fuel economy numbers to meet to sell the car.

Don't get me wrong, I'm not gonna be unreasonable. Maybe there's another 5 hp that they left on the table that can be freed up with some more unapologetic tuning, but I doubt the 5 hp they gifted for 2017+ was all there was to get from those changes.

Exactly! You can crank more out of the stock with a tune than bolting on a bunch of stuff without one.
It is however a 2L na engine and there is only so much you are going to get out of it no matter how you tune and what you bolt on anyway.

[DarkPira7e]

Originally Posted by Tcoat

It is however a 2L na engine and there is only so much you are going to get out of it no matter how you tune and what you bolt on anyway.

This is what gets me. I don't think it really sinks in with people that a NATURALLY ASPIRATED car with low capacity doesn't just magically make power. This engine in particular is already pretty strung out- how much more can you really expect?
I think the subaru community is used to I/H/E tuning numbers that seem magical, but the devil in the detail is that a turbo is far more flexible in output than a naturally aspirated motor. I certainly don't know many people that were able to take any Subaru H4 and add more than 20whp if it started and stays naturally aspirated.

[Tcoat]

Originally Posted by DarkPira7e

This is what gets me. I don't think it really sinks in with people that a NATURALLY ASPIRATED car with low capacity doesn't just magically make power. This engine in particular is already pretty strung out- how much more can you really expect?
I think the subaru community is used to I/H/E tuning numbers that seem magical, but the devil in the detail is that a turbo is far more flexible in output than a naturally aspirated motor. I certainly don't know many people that were able to take any Subaru H4 and add more than 20whp if it started and stays naturally aspirated.

The thing is that there are indeed many engines that can take a few bolt ons and get substantial increases in power. Hell the base (most common) 2JZ engine the F&F fanboys love so much is only rated at around 220HP. Unless you start with a top level one you have to do many of the common changes to get up over 250 much less the huge numbers that people seem to think it came from the factory with. There are also a bunch of older engines that can be built up using newer tech.
As you said the engines for the twins are pretty much already built as much as you can reasonably expect. Changing an existing CAI or header for a slightly different CAI or header is not going to gain you anything really.
Everybody thinks there must be some magic part that will substantially change the power but in reality all it does is convince them that they did something so it must be better.

[Overdrive]

Originally Posted by Tcoat

Exactly! You can crank more out of the stock with a tune than bolting on a bunch of stuff without one.
It is however a 2L na engine and there is only so much you are going to get out of it no matter how you tune and what you bolt on anyway.

Agreed. I don't want to go FI on the car, and E85 is simply not readily available where I live, so I'm going to look for all the help I can get on the NA side. Getting anywhere close to 200whp is an unlikely goal, but if I can get it there through some mods and tuning, or very close, I'd be quite happy.

[Ernest72]

On public roads the only thing this car needs is torque. Above 5000 the car moves pretty well. I would give up HP for torque for DD. I only notice it when I switch cars because my other cars have way more torque.

[Purist]

Originally Posted by Tcoat

Yes.

But...

The total of the intake, manifold, exhaust and internal changes in 17 came to a 5HP increase.

Why on earth do people think they are going to get more than that with just some spacers?

And why wouldn't Subaru build spacers into the design of their manifolds... or redesign their intakes as well seeing as how these aftermarket intakes do so much?





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