follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Speed By Design
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB > Technical Topics > Engine, Exhaust, Transmission

Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


User Tag List

Reply
 
Thread Tools Search this Thread
Old 05-25-2019, 10:28 AM   #1
KDad2
Senior Member
 
KDad2's Avatar
 
Join Date: Jan 2014
Drives: 2013 Raven
Location: Texas
Posts: 485
Thanks: 202
Thanked 345 Times in 183 Posts
Mentioned: 2 Post(s)
Tagged: 1 Thread(s)
Dented header

I'm upgrading my cooling system and went to pull the hose off the bottom of the radiator and noticed a dented header. Luckily my bottom panel saved my car from any more damage.

I contribute this to the construction on 281 north of 1604. I knew I hit a rock and had no choice. It was that or hit a car.


I'm sure this has caused interruption to the air flow. Question is how much?

Should I replace the entire header or just have someone cut and weld a new piece? It's a Tomei EL.


Sent from my SM-N960U using Tapatalk
KDad2 is offline   Reply With Quote
Old 05-25-2019, 11:03 AM   #2
Irace86.2.0
K Swap Everything
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 6,571
Thanks: 4,853
Thanked 5,005 Times in 2,800 Posts
Mentioned: 50 Post(s)
Tagged: 0 Thread(s)
That is legit. Lucky it didn’t hit/crack the oil pan.
__________________
Irace86.2.0 is offline   Reply With Quote
The Following User Says Thank You to Irace86.2.0 For This Useful Post:
KDad2 (05-25-2019)
Old 05-25-2019, 11:37 AM   #3
KDad2
Senior Member
 
KDad2's Avatar
 
Join Date: Jan 2014
Drives: 2013 Raven
Location: Texas
Posts: 485
Thanks: 202
Thanked 345 Times in 183 Posts
Mentioned: 2 Post(s)
Tagged: 1 Thread(s)
And I'm glad it didn't hit my fumato valve.

Sent from my SM-N960U using Tapatalk
KDad2 is offline   Reply With Quote
Old 05-25-2019, 11:39 AM   #4
Lantanafrs2
Senior Member
 
Join Date: Jan 2018
Drives: 2013 frs red
Location: South Florida
Posts: 3,146
Thanks: 2,056
Thanked 2,796 Times in 1,481 Posts
Mentioned: 4 Post(s)
Tagged: 1 Thread(s)
Might be able to heat it and pull dent out. Also, I dont believe it will hurt performance much.
Lantanafrs2 is offline   Reply With Quote
The Following User Says Thank You to Lantanafrs2 For This Useful Post:
KDad2 (05-25-2019)
Old 05-25-2019, 11:40 AM   #5
Irace86.2.0
K Swap Everything
 
Irace86.2.0's Avatar
 
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 6,571
Thanks: 4,853
Thanked 5,005 Times in 2,800 Posts
Mentioned: 50 Post(s)
Tagged: 0 Thread(s)
I was trying to find the video, but it was taken down from youtube. It was the Engine Masters episode where they bash headers and dyno the car. In short, bashing the headers didn't do much to alter power.

Could it cause a hot spot? Could it lead to a restriction that leads to hot gases working back into the cylinder increasing the chance of knock? I don't know, but their data was fairly convincing.

There will definitely be a loss of flow, but it probably depends on how much it is smashed. To use an example:

-A square with a size of 3x3'' has a circumference of 12'' and an area of 9 square inches.
-A squished square (aka rectangle) with a size of 4x2'' has a circumference of 12'' and an area of 8 square inches.
-What about in half? 4.5x1.5'' = 12'' circumference and 6.75 square inches. It still isn't a huge loss of area.
-A more squished with a size of 5x1'' has a circumference of 12'' and an area of 5 square inches. Now we are seeing a bigger jump in area.

As you can see, the second inch lost took a bigger hit to the surface area than the first inch. This is what Engine Masters found, that small to medium sized dents did little to flow, but large dents that reduced the diameter by greater than half is necessary to see some drop. Even then the drop wasn't significant, mostly happening on the top end; I think they even gained a little on the low end.
__________________
Irace86.2.0 is offline   Reply With Quote
The Following 3 Users Say Thank You to Irace86.2.0 For This Useful Post:
Clutch Dog (05-26-2019), KDad2 (05-25-2019), Ultramaroon (05-25-2019)
Old 05-25-2019, 11:48 AM   #6
KDad2
Senior Member
 
KDad2's Avatar
 
Join Date: Jan 2014
Drives: 2013 Raven
Location: Texas
Posts: 485
Thanks: 202
Thanked 345 Times in 183 Posts
Mentioned: 2 Post(s)
Tagged: 1 Thread(s)
Quote:
Originally Posted by Irace86.2.0 View Post
I was trying to find the video, but it was taken down from youtube. It was the Engine Masters episode where they bash headers and dyno the car. In short, bashing the headers didn't do much to alter power...
Thanks for that info. That probably explains why I have a bit more rumble in my EL. Haahaa.

The size is 2" x 1-1/2" x 1/2".

Sent from my SM-N960U using Tapatalk
KDad2 is offline   Reply With Quote
The Following User Says Thank You to KDad2 For This Useful Post:
Irace86.2.0 (05-25-2019)
Old 05-25-2019, 11:49 AM   #7
Lantanafrs2
Senior Member
 
Join Date: Jan 2018
Drives: 2013 frs red
Location: South Florida
Posts: 3,146
Thanks: 2,056
Thanked 2,796 Times in 1,481 Posts
Mentioned: 4 Post(s)
Tagged: 1 Thread(s)
If you're concerned enough, take it to weld shop and see if they can heat it and reshape it. I've done them in the past. Drill some pull holes and weld them up once your finished.
Lantanafrs2 is offline   Reply With Quote
The Following User Says Thank You to Lantanafrs2 For This Useful Post:
KDad2 (05-25-2019)
Old 05-25-2019, 11:50 AM   #8
KDad2
Senior Member
 
KDad2's Avatar
 
Join Date: Jan 2014
Drives: 2013 Raven
Location: Texas
Posts: 485
Thanks: 202
Thanked 345 Times in 183 Posts
Mentioned: 2 Post(s)
Tagged: 1 Thread(s)
Quote:
Originally Posted by Lantanafrs2 View Post
Might be able to heat it and pull dent out. Also, I dont believe it will hurt performance much.
I could give that a try.

If I wasn't so broke from starting my new company, I would just replace with an UEL header this time.

Sent from my SM-N960U using Tapatalk
KDad2 is offline   Reply With Quote
Old 05-25-2019, 03:04 PM   #9
humfrz
Senior Member
 
Join Date: May 2013
Drives: 2013 FR-S, white, MT
Location: Puyallup, WA
Posts: 29,075
Thanks: 27,394
Thanked 30,097 Times in 15,816 Posts
Mentioned: 690 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by KDad2 View Post
I could give that a try.

If I wasn't so broke from starting my new company, I would just replace with an UEL header this time.

Sent from my SM-N960U using Tapatalk
I wouldn't worry about it. As ol @Irace86.2.0 mentioned, their was a study done where they damned near mashed a header flat before they saw a significant difference in performance.

Good luck with your new business -


humfrz
humfrz is offline   Reply With Quote
The Following 3 Users Say Thank You to humfrz For This Useful Post:
Irace86.2.0 (05-25-2019), KDad2 (05-25-2019), Ultramaroon (05-25-2019)
Old 05-25-2019, 06:23 PM   #10
churchx
Senior Member
 
churchx's Avatar
 
Join Date: Mar 2015
Drives: 2014 GT86
Location: Latvia, Riga
Posts: 4,272
Thanks: 675
Thanked 2,037 Times in 1,400 Posts
Mentioned: 53 Post(s)
Tagged: 1 Thread(s)
I also saw that episode and unfortunately when i wanted to find it again to reference at similar topic, couldn't find anymore.

Funny bit was that in first "hammering mod" iterations they even saw power increase on that dynoed engine . I'm sure that this mod would have been favourite for TG's Clarkson, after all, hammer is only tool he can use, and he is always after more "POWEEER!!"
churchx is offline   Reply With Quote
The Following 2 Users Say Thank You to churchx For This Useful Post:
Irace86.2.0 (05-25-2019), KDad2 (05-25-2019)
Old 05-25-2019, 06:23 PM   #11
Ultramaroon
original flavor
 
Ultramaroon's Avatar
 
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 29,719
Thanks: 48,003
Thanked 33,119 Times in 17,346 Posts
Mentioned: 1059 Post(s)
Tagged: 9 Thread(s)
Wrap it back up, beat the ding out of the bottom cover, and fuggetaboutit.
__________________
Ultramaroon is offline   Reply With Quote
The Following 2 Users Say Thank You to Ultramaroon For This Useful Post:
humfrz (05-25-2019), KDad2 (05-26-2019)
Old 05-26-2019, 04:00 PM   #12
KDad2
Senior Member
 
KDad2's Avatar
 
Join Date: Jan 2014
Drives: 2013 Raven
Location: Texas
Posts: 485
Thanks: 202
Thanked 345 Times in 183 Posts
Mentioned: 2 Post(s)
Tagged: 1 Thread(s)
Got it done. Did a quick patch job with the wrap. But decided not to hammer out the bottom panel. Instead I went with Beatrush that's been in a dust covered box.

Sent from my SM-N960U using Tapatalk
KDad2 is offline   Reply With Quote
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Dented rocker panel daftpunk Cosmetic Maintenance (Wash, Wax, Detailing, Body Repairs) 49 08-15-2017 10:41 PM
Dented fuel injector? pgranberg11 Engine, Exhaust, Transmission 7 07-14-2015 12:58 AM
Somebody dented my FR-S smallfun Scion FR-S / Toyota 86 GT86 General Forum 24 08-22-2014 02:54 AM
Door dented and scratched FR Sports Cosmetic Maintenance (Wash, Wax, Detailing, Body Repairs) 2 04-07-2013 05:44 PM
dented bumper drei Cosmetic Maintenance (Wash, Wax, Detailing, Body Repairs) 14 12-03-2012 01:14 AM


All times are GMT -4. The time now is 05:02 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2022 DragonByte Technologies Ltd.

Garage vBulletin Plugins by Drive Thru Online, Inc.