Ask for suggestion for header (BRZ AT)

[tonystewart]

Based on experience with my daughters AT FRS...My Two Cents...

FA20Club Equal Length Header, Catted and Coated.



Nameless Performance Over pipe/Front Pipe (all in one piece) Catted and Helmholtz Resonator for the Automatic Transmission.



If you do those 2 items first you may not want an aftermarket cat back system. I would spend the catback exhaust system money on a Ecutek from Toni at FA20Club.com.
Then purchase a FA20Club.com CAI with the difference.

Ok..maybe it was 5 cents...:happy0180:

[cslntuee]

Originally Posted by FR-S Matt

Actually, the header along with the tune is what takes out the dip, not just the tune by itself. The tune does shorten the dip, but a header is the only item besides going FI to remove the dip completely with a tune.

Exhaust DOES matter if you combine the proper parts and do it right.

HI,

I am still debating with these three kinds of setup.

1. Only Nameless header + tune
2. Nameless header+ AVO Ceramic Coated overpipe+tune
3. Nameless header+ Nameless one piece (overpipe+ front pipe with a catalytic converter, helmholtz resonator)+tune

I plan to keep the stock midpipe and mufflersI did want to Kick out the torque dip, but I worried will be too loud.
I hope can keep reasonably quiet which close to stock.
I have another concerned is "back pressure", because I am daily driver
with AT and worry too smooth air flow will lose torque in low rpm.
How do you think? Compared the power gain in midrange of RPM and
the volume of the sound.
Which setup you suggest that I should go based on my need?
Thanks a lot.

[cslntuee]

Originally Posted by tonystewart

Based on experience with my daughters AT FRS...My Two Cents...

FA20Club Equal Length Header, Catted and Coated.



Nameless Performance Over pipe/Front Pipe (all in one piece) Catted and Helmholtz Resonator for the Automatic Transmission.



If you do those 2 items first you may not want an aftermarket cat back system. I would spend the catback exhaust system money on a Ecutek from Toni at FA20Club.com.
Then purchase a FA20Club.com CAI with the difference.

Ok..maybe it was 5 cents...:happy0180:

Will it too loud combine these two below together
FA20Club Equal Length Header, Catted and Coated+ Nameless Performance Over pipe/Front Pipe (all in one piece) Catted and Helmholtz Resonator?


Did you feel lose torque in low rpm?
Thanks

[cjsporl1996]

I would take a look at the openflash tablet bundle it comes with a tune and a high quality header for 1000 dollars. I have the borla headers, openflash stg 2, and a perrin header back exhaust. I have to regrets except for I wish the exhaust is louder but I love loud exhaust systems in general.

[FR-S Matt]

Originally Posted by cslntuee

HI,

I am still debating with these three kinds of setup.

1. Only Nameless header + tune
2. Nameless header+ AVO Ceramic Coated overpipe+tune
3. Nameless header+ Nameless one piece (overpipe+ front pipe with a catalytic converter, helmholtz resonator)+tune

I plan to keep the stock midpipe and mufflersI did want to Kick out the torque dip, but I worried will be too loud.
I hope can keep reasonably quiet which close to stock.
I have another concerned is "back pressure", because I am daily driver
with AT and worry too smooth air flow will lose torque in low rpm.
How do you think? Compared the power gain in midrange of RPM and
the volume of the sound.
Which setup you suggest that I should go based on my need?
Thanks a lot.

Option 3. The stock overpipe/frontpipe is the last restriction. The nameless 1 piece combo with the Helmholtz is awesome. Few bends, no rasp/drone. Hard to pass up the price/value it has combining two pieces in 1 and allowing a cat + Helmholtz.

[cslntuee]

Originally Posted by FR-S Matt

Option 3. The stock overpipe/frontpipe is the last restriction. The nameless 1 piece combo with the Helmholtz is awesome. Few bends, no rasp/drone. Hard to pass up the price/value it has combining two pieces in 1 and allowing a cat + Helmholtz.

I tried tocompare how much additional gain between only header and header+ downpipe(one piece (overpipe+ front).

I can only find the result from HKS.
http://www.hks-power.co.jp/product_db/exhaust/db/15165
I cannotread Japanese, so I just open by Google Chrome and use the translationfunction.
The Blue line is stock; Red: only header andYellow: Header+ downpipe.
I see almost nodifferent between red and yellow.
Actuallyyellow (Header+ downpipe) is slightly worse than the red ( only header). Itlost some torque in low rpm.
How do you think? Do you still sugguest me for option 3?
Thanks again.

[KoolBRZ]

I also have an A/T BRZ, and I've just bought 1 "TOP SPEED PRO-1 Performance Header Straight Flex Pipe", 1 set of 2 "GT86 Exhaust Header Flanges", 2 sets of 2 "ANTI REVERSION CONES FOR EXHAUST PIPES POWER AND TORQUE" (for Harley exhaust pipes), and I'm having a shop make a fixture to bolt the header to, cutting off the stock flanges, welding the anti-reversion cones into the stepped flanges, fastening the flanges to the fixture, and welding them onto the header. This should give me better low-end torque without sacrificing high-end power. I had been swapping out intake and exhaust parts for the best low-end torque and best mileage. When I opened up the exhaust with over pipe, mid pipe, and muffler, I would lose about 5 MPG. I could accelerate quicker, but only if I shift down. The low-end torque was not there for traffic acceleration. That is, quickly accelerating 5-10 MPH. That's where the V6's and V8's rule. When I run the stock exhaust the low-end torque is there, but the high-end power suffers. Back-pressure is required for better MPG and torque, but power suffers at high RPM's. After much research I learned that engines DON'T just pump air in a steady stream. They pulse at varying RPM's and varying velocities. If the RPM never varied the perfect manifold would be easy to design, but since it does, therein lies the problem. The best low-end torque is produced by a hot, high-velocity flow, through a narrow, straight pipe. Pipes joined together so that the pulse from one helps suck out the pulse from the other. The width of the tubing also has an effect on flow and torque. Consider the 2-stroke dirt bike exhaust. Why does it flare out from 1" to 4" and back to 1"? Because the design of entry and exit cones has the effect of moving the torque from the top-end of the power-band down lower. Making a pipey 2-stroke engine much more usable. We A/T FT86 owners want the same thing for daily drive-ability. More torque is more fun and more economical. The only way to get more low-end torque without sacrificing high-end power or MPG, is by using a header with entry and exit cones on each primary tube. Very expensive. NOT going to happen. If you want to try to make the best exhaust ever, try making this; a header with primary tubes bending 90 degrees then flaring out to a 30 degree angle entry cone then to a 3" pipe 18" long then to a sliding 45 degree exit cone inside a cone, then joining an opposing cylinder's tubing to help pull the pulse through and then dual exhaust on back. The sliding exit cones would move to bring the torque curve up or down depending on demand and RPM giving the ideal balance of torque, power, and economy. In an ideal world...

[KoolBRZ]

See my other post. I'm getting my flanges this Wednesday. Should be installing next weekend, the 15th-16th, I hope. I'll let you know how it works with a catless exhaust, or a stock midpipe and after-market muffler, or stock midpipe and stock muffler. Low-end Torque and economy are what I'm looking for.

[skye67]

[quote = cjsporl1996;13721
136]I would take a look at the openflash tablet bundle it comes with a tune and a high quality header for 1000 dollars. I have the borla headers, openflash stg 2, and a perrin header back exhaust. I have to regrets except for I wish the exhaust is louder but I love loud exhaust systems in general.[/quote]

I did a lot of research before I bought the OFH and OFT.
Removing the stock header is illegal in all states. Replacing it with a catted or uncatted header will still get you in trouble if the authorities find out that you have it installed..so plan on holding on to your stock one to swap it out for your inspections and or emissions testing..second the over pipe and Front pipe do little to nothing for performance gains as well as a cat back.