Help me choosing between these two manifolds - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

gpvecchi · 03-19-2022, 10:30 AM

I'm really debated between those two manifolds, I'll not post the brand for more impartiality. Both of them are 4-2-1.
What do you suggest and why? Thank you!

Lantanafrs2 · 03-19-2022, 10:48 AM

The merge looks nicer on the bottom one but wdik?

PulsarBeeerz · 03-19-2022, 12:19 PM

Whichever has a history of preforming the best.

whataboutbob · 03-19-2022, 12:53 PM

I'm not an expert on header design, but this page looks like it has a good discussion on header design considerations: https://www.enginelabs.com/engine-te...gn-and-theory/

The main difference between the 2 headers you posted looks to be the length of the primary runners. I'd suggest researching that aspect of the header design.

Espi · 03-19-2022, 01:39 PM

From what I've seen the longer runner style header is what gives this platform better performance - Think Ace, JDL, Nameless, P&L all longer style runners giving great numbers. I'd go for the bottom set

gpvecchi · 03-19-2022, 01:51 PM

That's what I read, anyway, while the second one in all the dynos I found gives a great result at high RPM, but a little loss of torque under 3000 RPM, the first one seems the opposite.
Both use 45mm primaries.

p1l0t · 03-19-2022, 01:53 PM

UEL because it sounds like a true Subaru

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Brz-123 · 03-19-2022, 02:35 PM

The first one looks like the prev gen ace which was the best. It's a 4-2-1 while the bottom one is 4-1. The way the latter looks is it dissipates too much heat and hence all the insulation even below the oil sump.
I will go with the former not the latter.

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PulsarBeeerz · 03-19-2022, 02:51 PM

Quote:

Originally Posted by Brz-123

The first one looks like the prev gen ace which was the best. It's a 4-2-1 while the bottom one is 4-1. The way the latter looks is it dissipates too much heat and hence all the insulation even below the oil sump.
I will go with the former not the latter.

Sent from my SM-G781B using Tapatalk

Look closer, they are both 4-2-1. One should run insulation on the oil pan regardless of header design.

gpvecchi · 03-19-2022, 02:54 PM

Quote:

Originally Posted by p1l0t

UEL because it sounds like a true Subaru

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EL, because I own a Toyota! :-D

p1l0t · 03-19-2022, 02:59 PM

Quote:

Originally Posted by gpvecchi

EL, because I own a Toyota! :-D

Well that would be the first one then but UEL sounds more cool.

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gpvecchi · 03-19-2022, 03:54 PM

Ehm, not my taste, it sounds like an Harley...

p1l0t · 03-19-2022, 04:04 PM

Quote:

Originally Posted by gpvecchi

Ehm, not my taste, it sounds like an Harley...

Then I guess you have your answer, you're welcome.

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weederr33 · 03-20-2022, 12:46 PM

Well the top one is HKS and it's a decent header. I'm not familiar with the bottom. But I'm sure either or will only net very little difference.

03-19-2022, 10:30 AM	#1
gpvecchi Senior Member Join Date: Mar 2018 Drives: Toyota 86 GT Limited PP (Model G) Location: Italy Posts: 1,018 Thanks: 406 Thanked 335 Times in 187 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	Help me choosing between these two manifolds I'm really debated between those two manifolds, I'll not post the brand for more impartiality. Both of them are 4-2-1. What do you suggest and why? Thank you!

03-20-2022, 12:46 PM	#14
weederr33 Airborne at your service Join Date: Sep 2014 Drives: '17 BRZ Series.Yellow Location: El Paso, Texas Posts: 6,325 Thanks: 4,528 Thanked 5,586 Times in 2,928 Posts Mentioned: 33 Post(s) Tagged: 2 Thread(s)	Well the top one is HKS and it's a decent header. I'm not familiar with the bottom. But I'm sure either or will only net very little difference. __________________ Series.Yellowbird - http://www.ft86club.com/forums/showthread.php?t=122135 MS, CSCS, TSAC-F, CPT

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03-19-2022, 10:48 AM	#2
Lantanafrs2 Senior Member Join Date: Jan 2018 Drives: 2013 frs red Location: South Florida Posts: 3,517 Thanks: 2,520 Thanked 3,088 Times in 1,654 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	The merge looks nicer on the bottom one but wdik?

03-19-2022, 12:19 PM	#3
PulsarBeeerz Senior Member Join Date: Mar 2017 Drives: JRSC BRZ SOLD Location: Ohio Posts: 934 Thanks: 676 Thanked 739 Times in 396 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Whichever has a history of preforming the best.

03-19-2022, 01:39 PM	#5
Espi Senior Member Join Date: Sep 2019 Drives: 17 BRZ Location: GA Posts: 221 Thanks: 221 Thanked 161 Times in 91 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	From what I've seen the longer runner style header is what gives this platform better performance - Think Ace, JDL, Nameless, P&L all longer style runners giving great numbers. I'd go for the bottom set

03-19-2022, 01:51 PM	#6
gpvecchi Senior Member Join Date: Mar 2018 Drives: Toyota 86 GT Limited PP (Model G) Location: Italy Posts: 1,018 Thanks: 406 Thanked 335 Times in 187 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	That's what I read, anyway, while the second one in all the dynos I found gives a great result at high RPM, but a little loss of torque under 3000 RPM, the first one seems the opposite. Both use 45mm primaries.

03-19-2022, 01:53 PM	#7
p1l0t Senior Member Join Date: Jan 2016 Drives: 2016 Subaru BRZ Hyperblue Location: West Hartford, CT Posts: 8,416 Thanks: 22,575 Thanked 9,371 Times in 4,813 Posts Mentioned: 58 Post(s) Tagged: 1 Thread(s)	UEL because it sounds like a true Subaru Sent from my SM-G975U using Tapatalk

03-19-2022, 02:35 PM	#8
Brz-123 Senior Member Join Date: Mar 2018 Drives: BRZ Location: UK Posts: 154 Thanks: 74 Thanked 80 Times in 59 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	The first one looks like the prev gen ace which was the best. It's a 4-2-1 while the bottom one is 4-1. The way the latter looks is it dissipates too much heat and hence all the insulation even below the oil sump. I will go with the former not the latter. Sent from my SM-G781B using Tapatalk

03-19-2022, 03:54 PM	#12
gpvecchi Senior Member Join Date: Mar 2018 Drives: Toyota 86 GT Limited PP (Model G) Location: Italy Posts: 1,018 Thanks: 406 Thanked 335 Times in 187 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	Ehm, not my taste, it sounds like an Harley...

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