AVO turbo kit for BRZ - initial build thread - Page 42 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Alienate · 09-22-2012, 12:01 AM

Quote:

Originally Posted by OmarGC

Loved the kit, but the UEL exhaust manifold will keep me from buying.

Can someone please explain, in detail, what this controversy is about. I have never owned a boxer engine before and am clueless.

Thanks!

deucethemoose · 09-22-2012, 12:21 AM

Technically the unequal length doesn't perform as well as equal length. Whether that performance decrease is even measurable is unknown on this application.

Personally I like the idea of unequal length. It gives the car personality. I don't care if it doesn't yield as high of numbers as equal length. We're talking nominal differences. I'll take that difference to have a car that doesn't sound like EVERY other 4-banger out on the road.

mact · 09-22-2012, 12:34 AM

^ Agreed. The "boxer rumble" is one of my favorite engine sounds.

OmarGC · 09-22-2012, 12:47 AM

Quote:

Originally Posted by Alienate

Can someone please explain, in detail, what this controversy is about. I have never owned a boxer engine before and am clueless.

Thanks!

It's a issue for me as what I'd be going for the best response/quickest spool time without suffering from substantial power loss up top. I road race, more then anything so that's the big thing to me. Meaning I'm looking for something with a equal length exhaust manifold with a collector that is going to be divided to utilize a twin scroll turbo properly. With an unequal length exhaust manifold you won't have any benefit when using a twin scroll turbo as there's going to be a difference in exhaust gas turbulence/speed entering the divided housing of the turbo... which "COULD" even make your spool time suffer big time.

There's other factors that will affect your spool time as well. IC piping length/diameter, IC core size, exhaust manifold length/turbos location, thermal coating, etc. etc. etc. but EL is definitely a major benefit, esp in a low displacement vehicle such as ours.

Kit looks awesome like I said before and definitely is going to be probably the cheapest option for all the guys just looking to have a boosted fr-s/brz... But when you're looking for the most efficient way to make the power there's definitely better options out there. Sure we'll see a Full Race kit in a few months that will fit my desires/needs, if I don't go custom fabbed or P&L with a GTX28/2871.

Oh! and also, this thing is going to have some definite rumble... never seen a manifold that unequal. Curious to hear it!

Tansey86 · 09-22-2012, 12:59 AM

You guys do realize there is more than just the UEL and having a " boxer motor " that makes that sound right? The firing and order and other things do contribute to that sound. I love the unique sound Subaru has made with previous cars(sti, wrx) but that sound might not be the same for this car. I personally think this car sounds great as is.

mact · 09-22-2012, 01:05 AM

Quote:

Originally Posted by Tansey86

You guys do realize there is more than just the UEL and having a " boxer motor " that makes that sound right? The firing and order and other things do contribute to that sound. I love the unique sound Subaru has made with previous cars(sti, wrx) but that sound might not be the same for this car. I personally think this car sounds great as is.

There are a couple of youtube videos of BRZ's with supposedly UEL headers, and it sounds sexxxxay.

Tansey86 · 09-22-2012, 01:12 AM

Quote:

Originally Posted by mact

There are a couple of youtube videos of BRZ's with supposedly UEL headers, and it sounds sexxxxay.

most of the exhaust videos sound sexy, its a good sounding motor.

Bomb3r · 09-22-2012, 01:46 AM

Quote:

Originally Posted by OmarGC

Loved the kit, but the UEL exhaust manifold will keep me from buying.

Why is Un-Even Length headers such a sticking point for people??

OmarGC · 09-22-2012, 01:49 AM

Quote:

Originally Posted by Bomb3r

Why is Un-Even Length headers such a sticking point for people??

See post #578

Ravenlokk · 09-22-2012, 01:54 AM

Quote:

Originally Posted by Bomb3r

Why is Un-Even Length headers such a sticking point for people??

Haters gonna hate.

Bomb3r · 09-22-2012, 02:02 AM

Quote:

Originally Posted by OmarGC

See post #578

Wow...expecting a lot out of this vehicle, wouldnt an Evo/STI be a smarter option for "road racing" ?

OmarGC · 09-22-2012, 02:04 AM

Quote:

Originally Posted by Bomb3r

Wow...expecting a lot out of a budget vehicle...

No more then the vehicle in your avatar pic with 10k worth of aero.

Ravenlokk · 09-22-2012, 02:30 AM

Can't wait for more updates for this sweet kit

Edit Add: What is the diameter for the dump pipe? I know its not production yet, but that is an ugly mofo lol.

Tansey86 · 09-22-2012, 03:39 AM

Quote:

Originally Posted by Bomb3r

Wow...expecting a lot out of this vehicle, wouldnt an Evo/STI be a smarter option for "road racing" ?

2700 rwd > 3500lb awd

09-22-2012, 12:21 AM	#576
deucethemoose Functionally Retarded Join Date: Jan 2012 Drives: LinkECU V6 MR2 - MKVII Golf R Location: PNW Posts: 709 Thanks: 81 Thanked 425 Times in 205 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Technically the unequal length doesn't perform as well as equal length. Whether that performance decrease is even measurable is unknown on this application. Personally I like the idea of unequal length. It gives the car personality. I don't care if it doesn't yield as high of numbers as equal length. We're talking nominal differences. I'll take that difference to have a car that doesn't sound like EVERY other 4-banger out on the road. __________________ 1991 MR2 - T-tops - Crimson Red - 1MZ-FE 3.0L - Other Stuff I'm not really an asshole, but I play one on the internet.

09-22-2012, 12:34 AM	#577
mact Senior Member Join Date: Feb 2012 Drives: 13 GTI Location: WI Posts: 416 Thanks: 119 Thanked 204 Times in 97 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	^ Agreed. The "boxer rumble" is one of my favorite engine sounds. __________________

09-22-2012, 02:30 AM	#587
Ravenlokk Senior Member Join Date: Aug 2012 Drives: 2013 Raven FR-S Location: Vancouver, Canada Posts: 265 Thanks: 34 Thanked 68 Times in 47 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Can't wait for more updates for this sweet kit Edit Add: What is the diameter for the dump pipe? I know its not production yet, but that is an ugly mofo lol. Last edited by Ravenlokk; 09-22-2012 at 02:33 AM. Reason: Added Question

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09-22-2012, 12:59 AM	#579
Tansey86 Senior Member Join Date: Sep 2012 Drives: 2003 Subaru Outback Location: Long Island, NY Posts: 1,318 Thanks: 154 Thanked 529 Times in 300 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	You guys do realize there is more than just the UEL and having a " boxer motor " that makes that sound right? The firing and order and other things do contribute to that sound. I love the unique sound Subaru has made with previous cars(sti, wrx) but that sound might not be the same for this car. I personally think this car sounds great as is.

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