3" Over/test pipe... - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

FAER · 06-28-2013, 07:08 AM

I'm continually told "they are out there" or "It can be done it just has to be custom"

whats the final verdict

FR-S Matt · 06-28-2013, 08:40 AM

Quote:

Originally Posted by FAER

I'm continually told "they are out there" or "It can be done it just has to be custom"

whats the final verdict

FAER · 06-28-2013, 08:51 AM

Quote:

Originally Posted by FR-S Matt

Are those 3" from header back and who makes them?!?

troek · 06-28-2013, 11:33 AM

i know perrin makes a 3 inch system. dont know if its readily available yet. some guys on the forum picked some up at a perrin booth at a expo of some sort

lbroskee · 06-28-2013, 11:36 AM

Quote:

Originally Posted by FAER

Are those 3" from header back and who makes them?!?

thats the nameless combo pipe. and that is @Sportsguy83 car

WolfsFang · 06-28-2013, 11:50 AM

your whole system would have to be 3" also or there is no point in having this.

sierra · 06-28-2013, 12:18 PM

Quote:

Originally Posted by WolfsFang

your whole system would have to be 3" also or there is no point in having this.

In theory the exhaust could get smaller as it goes back because the exhaust gasses contract as they cool and take up less space.

WolfsFang · 06-28-2013, 12:23 PM

Quote:

Originally Posted by sierra

In theory the exhaust could get smaller as it goes back because the exhaust gasses contract as they cool and take up less space.

ah never knew this, good info.

Fett4Real · 06-28-2013, 12:26 PM

Perrin isnt making a 3" overpipe from what they said when I asked them they said there isnt enough room for it. They said the 3" front pipe will be coming out next month

Chimpo · 06-28-2013, 12:41 PM

Correct me if I'm wrong, but 3" is overkill and simply not needed unless you're running boost, etc (i.e. 200WHP need not apply)??

Are you planning big power later?

Element Tuning · 06-28-2013, 12:48 PM

Quote:

Originally Posted by sierra

In theory the exhaust could get smaller as it goes back because the exhaust gasses contract as they cool and take up less space.

This is true and I think for the average 300 whp pump gas kit a 3" over pipe isn't required. For the guys going for 400+ 3" all the way will absolutely make a difference. Can you still make big power without 3", yes, but the guys with 3" will make more.

I need a 3" over pipe!

Fett4Real · 06-28-2013, 01:23 PM

Most K20s benifit from a 70mm headerback...so I dont see why we wouldnt as well...

Mild2Wild · 06-28-2013, 01:29 PM

Becuz K20 haha. Doesn't seem like this engine can benefit from it quite like the k series.

Fett4Real · 06-28-2013, 02:39 PM

Yeh because 12.5:1 compression engines need a small diameter exhuast...troll somewhere else....does SEEM like you offer any valid information relevant to the thread.

Like I said Perrin said that there isnt the clearance to fit it. I think I read about 1 somewhere though...I would think it would be worth it based on other 2 liter NA motors and FI motors that see results with similar setups

and whats amusing is you said a similar thing in another 3" exhaust thread about the K20...

06-28-2013, 07:08 AM	#1
FAER Banned Join Date: Mar 2013 Drives: Silver BRZ Location: Texas Posts: 361 Thanks: 22 Thanked 118 Times in 86 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	3" Over/test pipe... I'm continually told "they are out there" or "It can be done it just has to be custom" whats the final verdict

06-28-2013, 11:50 AM	#6
WolfsFang Scrape Master Join Date: Jun 2012 Drives: Goal: Oldest FRS State Side Location: North NJ Posts: 1,161 Thanks: 238 Thanked 412 Times in 238 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	your whole system would have to be 3" also or there is no point in having this. __________________ You do realize comparing the BRZ to the FR-S is like comparing which hand you love masterbating too right?

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06-28-2013, 12:26 PM	#9
Fett4Real AKA Mugen Dom Join Date: May 2013 Drives: 2013 FR-S, 2007 FJ Voodoo Blue Location: Hill AFB UT Posts: 957 Thanks: 125 Thanked 337 Times in 239 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Perrin isnt making a 3" overpipe from what they said when I asked them they said there isnt enough room for it. They said the 3" front pipe will be coming out next month

06-28-2013, 12:41 PM	#10
Chimpo Senior Member Join Date: Sep 2012 Drives: '15 STi Ltd Location: Probably a location near you! Posts: 297 Thanks: 37 Thanked 149 Times in 61 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Correct me if I'm wrong, but 3" is overkill and simply not needed unless you're running boost, etc (i.e. 200WHP need not apply)?? Are you planning big power later?

06-28-2013, 01:23 PM	#12
Fett4Real AKA Mugen Dom Join Date: May 2013 Drives: 2013 FR-S, 2007 FJ Voodoo Blue Location: Hill AFB UT Posts: 957 Thanks: 125 Thanked 337 Times in 239 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Most K20s benifit from a 70mm headerback...so I dont see why we wouldnt as well...

06-28-2013, 02:39 PM	#14
Fett4Real AKA Mugen Dom Join Date: May 2013 Drives: 2013 FR-S, 2007 FJ Voodoo Blue Location: Hill AFB UT Posts: 957 Thanks: 125 Thanked 337 Times in 239 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Yeh because 12.5:1 compression engines need a small diameter exhuast...troll somewhere else....does SEEM like you offer any valid information relevant to the thread. Like I said Perrin said that there isnt the clearance to fit it. I think I read about 1 somewhere though...I would think it would be worth it based on other 2 liter NA motors and FI motors that see results with similar setups and whats amusing is you said a similar thing in another 3" exhaust thread about the K20...

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