2013 intake manifold vs 2017 Aluminium intake manifold - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Tcoat · 11-20-2016, 08:49 PM

Quote:

Originally Posted by Calum

The tune is also different. They could have gotten that much from tuning alone.

Yep. (and tune was in my list).
A lot of things changed to get that 5HP gain so not sure why so many seem to think that manifold is some magic bullet they just bolt on and make huge gains.

churchx · 11-20-2016, 08:50 PM

Yet even for MY2017 they still have constraints to have tune conservative enough to deal with crappy fuel world-wide. No wonder if they played it safe this time too.

Lantana frs · 11-20-2016, 09:23 PM

Imo there is some significance to the the area of the torque dip. Might be a happy spot for the motor that needed to be suppressed to meet noise/emissions requirements. Other than that, they spent a lot for a meager overall gain. Probably speaks to the stringency of standards that needed to be met. At least the new manifold wont inflate under high boost.

CSG Mike · 11-20-2016, 10:12 PM

Quote:

Originally Posted by Tcoat

Yep. (and tune was in my list).
A lot of things changed to get that 5HP gain so not sure why so many seem to think that manifold is some magic bullet they just bolt on and make huge gains.

Quote:

Originally Posted by Lantana frs

Imo there is some significance to the the area of the torque dip. Might be a happy spot for the motor that needed to be suppressed to meet noise/emissions requirements. Other than that, they spent a lot for a meager overall gain. Probably speaks to the stringency of standards that needed to be met. At least the new manifold wont inflate under high boost.

The majority is from a revised header design.

Summerwolf · 11-20-2016, 11:22 PM

Kind of an odd question, but is this new manifold's part number the same as a boosted applications? If so... im betting it was a cost saving measure long term for subaru to use across all their "f" series motors.

lowlevel · 11-21-2016, 12:17 AM

Quote:

Originally Posted by Tcoat

Yep. (and tune was in my list).
A lot of things changed to get that 5HP gain so not sure why so many seem to think that manifold is some magic bullet they just bolt on and make huge gains.

Not sure either.. my gut says the plastic is actually better for NA/stock.. but I do like red.

Calum · 11-21-2016, 06:27 AM

Quote:

Originally Posted by Tcoat

Yep. (and tune was in my list).
A lot of things changed to get that 5HP gain so not sure why so many seem to think that manifold is some magic bullet they just bolt on and make huge gains.

Damn, missed that.

wparsons · 11-21-2016, 04:38 PM

Quote:

Originally Posted by Summerwolf

Kind of an odd question, but is this new manifold's part number the same as a boosted applications? If so... im betting it was a cost saving measure long term for subaru to use across all their "f" series motors.

IIRC, the turbo engines use tumble valves still, so I doubt it's the same part.

CSG Mike · 11-21-2016, 05:45 PM

Quote:

Originally Posted by wparsons

IIRC, the turbo engines use tumble valves still, so I doubt it's the same part.

correct, the DIT has a TGV, similar to the EJ.

bem75 · 12-13-2016, 10:14 AM

Has anyone tested this with FI? What are thoughts on this in a racing application, FI, with lots of heat under the hood? Heat soak has been a big issue for me.

guybo · 12-13-2016, 12:00 PM

Does the orig plastic intake manifold have a history of breaking? The Genesis Coupe 2.0T was plastic and had a bad rep for breaking at the gasket even at stock boost (which is still 18 PSI). But I don't recall reading about too many Twins blowing up intake manis.

As for the red... c'mon, we all know that was done so you'd know that YOU have the upgraded engine.

driggity · 12-13-2016, 01:42 PM

Quote:

Originally Posted by CSG Mike

correct, the DIT has a TGV, similar to the EJ.

Are the TGV integrated into the manifold? I know that at least on the old EJs they sat between the manifold and the heads.

Quote:

Originally Posted by guybo

Does the orig plastic intake manifold have a history of breaking? The Genesis Coupe 2.0T was plastic and had a bad rep for breaking at the gasket even at stock boost (which is still 18 PSI). But I don't recall reading about too many Twins blowing up intake manis.

Subaru has been using plastic intake manifolds on factory turbo cars since at least 2005 and I think they've been very reliable. I don't remember hearing about any failures when I had my 2005 Legacy GT. That being said I don't know if the intake manifold on the twins is manufactured in the same way and is the same material.

gramicci101 · 12-13-2016, 02:02 PM

The only issues Subaru has had with plastic on factory turbo cars has been the plastic intercooler end tanks separating from the metal core on Legacy GTs under high (not OEM) boost levels. And even then it's more of an urban legend that started after a few failures.

CSG Mike · 12-13-2016, 04:18 PM

Quote:

Originally Posted by driggity

Are the TGV integrated into the manifold? I know that at least on the old EJs they sat between the manifold and the heads.

Subaru has been using plastic intake manifolds on factory turbo cars since at least 2005 and I think they've been very reliable. I don't remember hearing about any failures when I had my 2005 Legacy GT. That being said I don't know if the intake manifold on the twins is manufactured in the same way and is the same material.

It's sandwiched in.

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11-20-2016, 08:50 PM	#16
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,336 Thanks: 698 Thanked 2,091 Times in 1,437 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	Yet even for MY2017 they still have constraints to have tune conservative enough to deal with crappy fuel world-wide. No wonder if they played it safe this time too.

11-20-2016, 09:23 PM	#17
Lantana frs Senior Member Join Date: Jun 2016 Drives: 13 frs red Location: Lantana fl Posts: 448 Thanks: 51 Thanked 198 Times in 115 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Imo there is some significance to the the area of the torque dip. Might be a happy spot for the motor that needed to be suppressed to meet noise/emissions requirements. Other than that, they spent a lot for a meager overall gain. Probably speaks to the stringency of standards that needed to be met. At least the new manifold wont inflate under high boost.

11-20-2016, 11:22 PM	#19
Summerwolf Panda Trueno Join Date: Jan 2015 Drives: No twin now. Location: North Indiana Posts: 3,349 Thanks: 2,113 Thanked 2,409 Times in 1,332 Posts Mentioned: 17 Post(s) Tagged: 2 Thread(s)	Kind of an odd question, but is this new manifold's part number the same as a boosted applications? If so... im betting it was a cost saving measure long term for subaru to use across all their "f" series motors.

12-13-2016, 10:14 AM	#24
bem75 Round 3 Racing Join Date: Aug 2015 Drives: Scion FR-S race car Location: South Florida Posts: 27 Thanks: 3 Thanked 14 Times in 8 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Has anyone tested this with FI? What are thoughts on this in a racing application, FI, with lots of heat under the hood? Heat soak has been a big issue for me.

12-13-2016, 12:00 PM	#25
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	Does the orig plastic intake manifold have a history of breaking? The Genesis Coupe 2.0T was plastic and had a bad rep for breaking at the gasket even at stock boost (which is still 18 PSI). But I don't recall reading about too many Twins blowing up intake manis. As for the red... c'mon, we all know that was done so you'd know that YOU have the upgraded engine.

12-13-2016, 02:02 PM	#27
gramicci101 Off Topic Join Date: Feb 2014 Drives: 2014 Subaru BRZ Limited Location: Vegas, baby! Posts: 4,610 Thanks: 2,369 Thanked 4,243 Times in 2,170 Posts Mentioned: 43 Post(s) Tagged: 3 Thread(s)	The only issues Subaru has had with plastic on factory turbo cars has been the plastic intercooler end tanks separating from the metal core on Legacy GTs under high (not OEM) boost levels. And even then it's more of an urban legend that started after a few failures.

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