UEL Header Development

[dem00n]

Originally Posted by sierra

Gotta say the sound doesn't suit the car.

Same.
Doesn't fit the car, to much low end. Low end is great but not so much in this case.

[86drift]

For those that don't think the sound suits the car I'll direct you to my EL Length Header thread.
If you're still not happy then you're plain out of luck

This thread is for people who do think it suits the car.

[sierra]

Originally Posted by speed6sam

How so?

I think it gives just the right amount of aggressive tone to fit the car.

It sounds the same as the other subaru boxer engines but this is a new high performance version that was fitted with ELH for max efficiency. It sounds sweet and unique.
The old half a V8 sound has had its day.
A compromise perhaps but it still needs to be unique and not the same as it was.

[xxscaxx]

I rather it sound like a boxer motor than a Honda.

[sierra]

Originally Posted by xxscaxx

I rather it sound like a boxer motor than a Honda.

Even though you know it only sounds like that because Subaru fitted a cheap compromise UEL header to save money?

[xxscaxx]

My uel stock header with a grimmspeed cross pipe flowed just fine on my sti thank you very much. I made 460whp on my stock header.

But it must be cheap compromise boxer rumble makes it unique from every other car out there, but that's my opinion, obviously not yours.

[sierra]

Originally Posted by xxscaxx

My uel stock header with a grimmspeed cross pipe flowed just fine on my sti thank you very much. I made 460whp on my stock header.

But it must be cheap compromise boxer rumble makes it unique from every other car out there, but that's my opinion, obviously not yours.

You can regain the power lost by increasing the boost but it's still going to make less power using the UEL headers than it would with a properly engineered balanced system and the same boost.
It's not boxer rumble, it's UEL header rumble and you could make any 4 cylinder engine sound like that by fitting UEL headers.

Fair enough that people have got used to the sound and like it but it is what it is, the sound of inefficiency and lost power. It's certainly nothing to do with being a boxer engine and the GT86/BRZ has just proved that.

[xxscaxx]

Lol you cannot make any 4 cylinder sound like that.

It's clear you don't care for an uel header development, so you trying to prove a point to me, is pointless lol.

[sierra]

Originally Posted by xxscaxx

Lol you cannot make any 4 cylinder sound like that.

It's clear you don't care for an uel header development, so you trying to prove a point to me, is pointless lol.

If you fitted the pipes to match the length and firing order then it would sound the same. That's how the sound is derived, by delaying the pulse in the longer tubes so that they arrive at the collector at the wrong time to give the uneven note.

I'm not 'trying' to prove a point, i'm simply stating facts.

For the record I had a WRX with a 3" SS system and loved it but I once heard a WRX that clearly had equal length headers fitted and liked that even more.

[xxscaxx]

I actually had equal length headers as well at one point on my STi. I didn't mind it but preferred the UEL. It's all preference man.

I know how the sound is derived, but I still don't think you could get the same sound out of an inline 4.

[Admiral Ballsy]

Originally Posted by sierra

If you fitted the pipes to match the length and firing order then it would sound the same. That's how the sound is derived, by delaying the pulse in the longer tubes so that they arrive at the collector at the wrong time to give the uneven note.

If that were true it would only sound that way at certain engine speeds...at speeds where the harmonics of the two sides coincided, it would sound like a 4-1.

It's not the EL/UEL, it's the way the cylinders' exhaust is combined. If you took an inline four and made a triple-Y header, where the 'Y's were consecutive-firing cylinders, you'd get this sound. But nobody would do that, because it's exactly the wrong thing to do for power.

[sierra]

Originally Posted by Admiral Ballsy

If that were true it would only sound that way at certain engine speeds...at speeds where the harmonics of the two sides coincided, it would sound like a 4-1.

It's not the EL/UEL, it's the way the cylinders' exhaust is combined. If you took an inline four and made a triple-Y header, where the 'Y's were consecutive-firing cylinders, you'd get this sound. But nobody would do that, because it's exactly the wrong thing to do for power.

The equal length headers ensure that each exhaust pulse reaches the collector in perfect time to create a series of equally spaced pulses to take their place through the rest of the exhaust system.
Since the small volume of those header pipes receive the greatly expanded cylinder contents it wouldn't be possible for what you suggest to occur but I did have to think hard about it. Each pulse would be long gone before the next one entered the header so there would no chance of any harmonising.

I agree that nobody would fit such a system to a straight 4 because it would lose power, the same as it does for a flat 4.

[86drift]

If you want a UEL vs EL debate find another thread.

Originally Posted by 86drift

This thread is for people who do think it suits the car.

[001BRZ]

Sounds great, should sound awesome with a good cat-back