Best Catted Header for the Buck?? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ramiram1984 · 02-03-2014, 08:29 PM

http://www.ft86club.com/forums/showthread.php?t=57369 lol

Eau Rouge · 02-03-2014, 08:39 PM

Nice exchange on info and perspectives everyone, thank you! It seems to bear out what I've heard that the OEM exhaust manifold is deficient from a performance perspective mainly due to the less than optimum merging of the exhaust gases before they're routed into the cat, hence the torque dip that gets reduced/eliminated once a header with a better collector is in place.

For my purposes, I'll likely eventually end up with one of the CARB certified centrifugal superchargers and will be swapping back in the OEM manifold/cat every 2nd year. That may also mean I'll need to reflash between two different tunes once ever 730 days if I want to fully maximize the non-CARB setup (or not if there isn't enough difference to warrant the cost of a 2nd tune). The good news is that here new vehicles no longer require a smog inspection/certification until they reach six years old.

FR-S Matt · 02-04-2014, 12:11 AM

Quote:

Originally Posted by thehapaone

the ft86speedfactory catted header showed elimination of the torque dip and a few horsepower gain on the stock tune

The advanced multiplier also wasn't set to 1, hence a fresh ECU reset for the pull. Don't let that chart fool you. There isn't a single header that eliminates the dip by itself on a stock tune. Someone even made the dip look like it went away on a stock header because of ECU resets.

Fizz · 02-04-2014, 01:49 AM

Which is why i'm still waiting for independent dyno charts for both the OFH and FT86SF header before I commit to buying.

Wepeel · 02-04-2014, 10:08 AM

Quote:

Originally Posted by FR-S Matt

The advanced multiplier also wasn't set to 1, hence a fresh ECU reset for the pull. Don't let that chart fool you. There isn't a single header that eliminates the dip by itself on a stock tune. Someone even made the dip look like it went away on a stock header because of ECU resets.

Do you happen to have a link to that post? How would an ECU reset make the dip look like it went away?

Eau Rouge · 02-04-2014, 08:43 PM

Quote:

Originally Posted by Wepeel

Do you happen to have a link to that post? How would an ECU reset make the dip look like it went away?

I'd like to see the background behind this, too.

tonystewart · 02-04-2014, 11:39 PM

Currently running the FA20club catted EL header, awaiting the replacement pipe from FA20club to make it cat free. It is a reasonably priced header with good gains, I wonder if the primary cat removal will be a noticeable change.

OFT Stage 2 EL Header Gas Tune 1.55b runs very well with this header.

02-04-2014, 11:39 PM	#21
tonystewart Senior Member Join Date: May 2012 Drives: 2013 Scion FR-S Raven Location: Lake Worth Florida Posts: 1,182 Thanks: 76 Thanked 373 Times in 253 Posts Mentioned: 13 Post(s) Tagged: 1 Thread(s)	Currently running the FA20club catted EL header, awaiting the replacement pipe from FA20club to make it cat free. It is a reasonably priced header with good gains, I wonder if the primary cat removal will be a noticeable change. OFT Stage 2 EL Header Gas Tune 1.55b runs very well with this header. __________________ May'12 AT Raven, OFT V2, Perrin IntakeTube, Pulley & Overpipe,HKS Snorkel,FA20 EL Header,Nameless Frontpipe w/ Helmholtz, Crawford AOS, Cusco O2W Cooler, Grimmspeed Strut/MC Brace, Winjets w/D2S 3.0 HID by Illuminating Lighworkx, Fogs w/EU Stalk, LED's, JDM UnderPanels, Diffuser, Rigid Collars, Whiteline, HVT Camber Plates, Koni's, Swift Springs, GTSpec LCA, SPC Toearms, DBA 4K T-Slot Rotors, Ferodo DS2500, Vorshlag BrakeLines, MichelinPSS, 5Axis Wing, Raammat, Ensolite, JPM Coachworks, OEM+Ref400, 20mmspacers, TOMS

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02-03-2014, 08:39 PM	#16
Eau Rouge Member Join Date: Oct 2012 Drives: 2013 BRZ, Limited, C7P, 6AT Location: Monterey, CA Posts: 83 Thanks: 1 Thanked 8 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Nice exchange on info and perspectives everyone, thank you! It seems to bear out what I've heard that the OEM exhaust manifold is deficient from a performance perspective mainly due to the less than optimum merging of the exhaust gases before they're routed into the cat, hence the torque dip that gets reduced/eliminated once a header with a better collector is in place. For my purposes, I'll likely eventually end up with one of the CARB certified centrifugal superchargers and will be swapping back in the OEM manifold/cat every 2nd year. That may also mean I'll need to reflash between two different tunes once ever 730 days if I want to fully maximize the non-CARB setup (or not if there isn't enough difference to warrant the cost of a 2nd tune). The good news is that here new vehicles no longer require a smog inspection/certification until they reach six years old.

02-04-2014, 01:49 AM	#18
Fizz Senior Addict Join Date: Jan 2013 Drives: 86 GT Location: Perth, Australia Posts: 1,217 Thanks: 249 Thanked 336 Times in 215 Posts Mentioned: 12 Post(s) Tagged: 0 Thread(s)	Which is why i'm still waiting for independent dyno charts for both the OFH and FT86SF header before I commit to buying.

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