Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Ceramic coat exhaust and performance gain questions

BuffDriver · 02-02-2017, 12:13 AM

Long post because it has to be to explain everything.
I am going to stay NA and am only attempting to up the horsepower a little and reduce SOME of the torque dip as possible with these mods (secondary reason for exhaust changes, getting better sound). I will NOT be changing the header even if it would make the most difference. Run 93 octane pump gas with no plans for E85 since it is so hard to get in my locality (30 miles is just too far for DD) No interest in FI /turbo/super charger mod.

Waiting on delivery this week of: Perrin Exhaust 2.5 Overpipe + 2.5 catback resonated exhaust (PSP-EXT-360BR). Have a Berk Catted 2.5 front pipe which will complete my header back system.

Thinking about thermal ceramic coating because I want to keep the temperature down under the car, keep ‘new’ appearance… not expecting much performance boost from coating since NA.

Question 1 - Contradictory information saying Yes or No all over the Internet that only coating the outside will damage SS exhaust pipe due to excessive metal overheating under the coating. Do any members/anyone at FT86club have actual experience ( anecdotes of my friend’s friend’s uncles friend, I have read plenty of. Looking for member real world long term experience that is not yet covered in any exhaust thread of which I have read all of them, mostly from years ago, here and on other FT85/FRS/BRZ sites) Note that the catted front pipe can not be inside coated anyway plus there is more contradictory info about OK or not to coat outside of cat because of claims of ‘overheating’. Bogus?

Question 2 - Best coating and what company gave best customer service?: Lots of discussion on whether to coat headers but not much on other parts of exhaust system. Very few posts on what coating was actually used or any feedback on long term satisfaction and durability. These questions should be of interest to the FI guys so lack of information is puzzling.

Question 3 - Have looked at: Performance Coating, Cerokote, Swaintech, HPC Extreame… any others to consider (Note: JetHot has a very bad rep when I asked here locally)

Question 4 – How much will ECU adjust to these intake and exhaust mods? I know a tune will bring out ‘everything’ but I am asking for anyone with any idea if the ECU ‘limits’ adjusting to a set level much below the possible with these bolt-ons… or will OFT tune be mandatory to get ANY gain at all? Just how much will the ECU ‘learn’?

Honestly, with what I have done, mainly I wanted to lessen the torque dip. I would just go with mods I have listed without tune (understand I am not expecting much HP increase without header). I obviously have a warranty on a brand new car and feel I can get away with bolt on parts legally… but if I do a dyno n tune or an OFT it has to be undetectable / reversible when I will be using the 7 year unlimited mileage bumper to bumper dealership full service + repair warranty policy. Service every 6K miles at dealership.
Read all the threads n posts by Steve99 and others but still have questions about…

What I have done/installed so far since bought my Bluescoot in September 2016 {not counting above exhaust to be installed soon}:
1. 1. Oil Cooler Kit by RacerX Fabrication: { BUT instead of their hoses instead had two custom -10 [ Ouch! ordered/approved without asking cost, because RACECAR! Custom hose cost $308.08] Chemfluor® PTFE fluoropolymer smooth inner tube and EPDM cover, reinforced with a 304 stainless steel tube tensile strength braid stainless hoses n stainless fittings} and Setrab Proline 613 cooler.
2. 2. Horns (WTH, just had to while had front end open installing oil cooler): PIAA Sport #85110, 115db, 400HZ + 500HZ …Great sound compared to OEM toy horns.

1. 1. MTEC Clutch pedal replacement spring
2. 2. Change to small bore transmission/Clutch slave cylinder as per http://www.ft86club.com/forums/showthread.php?t=77390 , THANKS Ultramaroon!!
3. 3. Adjust clutch pedal height with linkage clevis to ‘even with brake pedal’ to adjust ‘clutch grab’

1. 1. Drain n change transmission and rear differential fluid to Motul Gear 300 75W90 (with new fill n drain plug washers)
2. 2. TRD Quickshift kit, PTR54-18130 (used RED Loctite and no bolt loosening prob in 6 months) http://www.ft86club.com/forums/showt...sion+whiteline
3. 3. Whiteline Positive Shift kit bushing KDT926 transmission mount insert
4. 4. MTEC Transmission shifter/centering spring(s)

1. 1. Crawford Performance BPB ‘Billet power blocks’
2. 2. Crawford EcoBlock

Results: What the car SHOULD HAVE BEEN from the factory. Clutch and shift feel are just ‘right’!

02-02-2017, 12:13 AM	#1
BuffDriver Member Join Date: Oct 2016 Drives: 2016 Subaru BRZ Location: Houston area, Texas Posts: 66 Thanks: 13 Thanked 41 Times in 22 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Ceramic coat exhaust and performance gain questions Long post because it has to be to explain everything. I am going to stay NA and am only attempting to up the horsepower a little and reduce SOME of the torque dip as possible with these mods (secondary reason for exhaust changes, getting better sound). I will NOT be changing the header even if it would make the most difference. Run 93 octane pump gas with no plans for E85 since it is so hard to get in my locality (30 miles is just too far for DD) No interest in FI /turbo/super charger mod. Waiting on delivery this week of: Perrin Exhaust 2.5 Overpipe + 2.5 catback resonated exhaust (PSP-EXT-360BR). Have a Berk Catted 2.5 front pipe which will complete my header back system. Thinking about thermal ceramic coating because I want to keep the temperature down under the car, keep ‘new’ appearance… not expecting much performance boost from coating since NA. Question 1 - Contradictory information saying Yes or No all over the Internet that only coating the outside will damage SS exhaust pipe due to excessive metal overheating under the coating. Do any members/anyone at FT86club have actual experience ( anecdotes of my friend’s friend’s uncles friend, I have read plenty of. Looking for member real world long term experience that is not yet covered in any exhaust thread of which I have read all of them, mostly from years ago, here and on other FT85/FRS/BRZ sites) Note that the catted front pipe can not be inside coated anyway plus there is more contradictory info about OK or not to coat outside of cat because of claims of ‘overheating’. Bogus? Question 2 - Best coating and what company gave best customer service?: Lots of discussion on whether to coat headers but not much on other parts of exhaust system. Very few posts on what coating was actually used or any feedback on long term satisfaction and durability. These questions should be of interest to the FI guys so lack of information is puzzling. Question 3 - Have looked at: Performance Coating, Cerokote, Swaintech, HPC Extreame… any others to consider (Note: JetHot has a very bad rep when I asked here locally) Question 4 – How much will ECU adjust to these intake and exhaust mods? I know a tune will bring out ‘everything’ but I am asking for anyone with any idea if the ECU ‘limits’ adjusting to a set level much below the possible with these bolt-ons… or will OFT tune be mandatory to get ANY gain at all? Just how much will the ECU ‘learn’? Honestly, with what I have done, mainly I wanted to lessen the torque dip. I would just go with mods I have listed without tune (understand I am not expecting much HP increase without header). I obviously have a warranty on a brand new car and feel I can get away with bolt on parts legally… but if I do a dyno n tune or an OFT it has to be undetectable / reversible when I will be using the 7 year unlimited mileage bumper to bumper dealership full service + repair warranty policy. Service every 6K miles at dealership. Read all the threads n posts by Steve99 and others but still have questions about… What I have done/installed so far since bought my Bluescoot in September 2016 {not counting above exhaust to be installed soon}: 1. 1. Oil Cooler Kit by RacerX Fabrication: { BUT instead of their hoses instead had two custom -10 [ Ouch! ordered/approved without asking cost, because RACECAR! Custom hose cost $308.08] Chemfluor® PTFE fluoropolymer smooth inner tube and EPDM cover, reinforced with a 304 stainless steel tube tensile strength braid stainless hoses n stainless fittings} and Setrab Proline 613 cooler. 2. 2. Horns (WTH, just had to while had front end open installing oil cooler): PIAA Sport #85110, 115db, 400HZ + 500HZ …Great sound compared to OEM toy horns. 1. 1. MTEC Clutch pedal replacement spring 2. 2. Change to small bore transmission/Clutch slave cylinder as per http://www.ft86club.com/forums/showthread.php?t=77390 , THANKS Ultramaroon!! 3. 3. Adjust clutch pedal height with linkage clevis to ‘even with brake pedal’ to adjust ‘clutch grab’ 1. 1. Drain n change transmission and rear differential fluid to Motul Gear 300 75W90 (with new fill n drain plug washers) 2. 2. TRD Quickshift kit, PTR54-18130 (used RED Loctite and no bolt loosening prob in 6 months) http://www.ft86club.com/forums/showt...sion+whiteline 3. 3. Whiteline Positive Shift kit bushing KDT926 transmission mount insert 4. 4. MTEC Transmission shifter/centering spring(s) 1. 1. Crawford Performance BPB ‘Billet power blocks’ 2. 2. Crawford EcoBlock Results: What the car SHOULD HAVE BEEN from the factory. Clutch and shift feel are just ‘right’!