ZPOST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   ZPOST > BMW Z4 Technical Talk > Engine, Exhaust, Drivetrain Modifications
  TireRack

SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
View Poll Results: Headers; jethot or not
Hell yes it's easilly worth the extra $300 11 73.33%
No, save your money 4 26.67%
Voters: 15. You may not vote on this poll

Post Reply
 
Thread Tools Search this Thread
      08-23-2012, 02:52 PM   #1
inTgr8r
Major General
inTgr8r's Avatar
Canada
132
Rep
8,428
Posts

Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

JetHot coating on headers; worth it or not?

I know '-villa's opinion on this
&.... it has been discussed a few times already.

Assuming cost is in the $300 range
Just looking for opinions is it worth it or not.
what are the realistic benefits of jethot coating headers? (new installation)
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R fr ARB•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•

Last edited by inTgr8r; 08-23-2012 at 03:52 PM.
Appreciate 0
      08-23-2012, 02:58 PM   #2
Beedub
Brigadier General
United Kingdom
67
Rep
4,311
Posts

Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

i would do this if i was putting in euro or aftermarket headers, if their already in place..... i wouldn't bother imo!!

hell id do it just for the clean look, let alone the benefits of heat retention..... looking at your cars spec, i think its time you added FI !!!
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      08-23-2012, 03:14 PM   #3
inTgr8r
Major General
inTgr8r's Avatar
Canada
132
Rep
8,428
Posts

Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

^ Yes, new installation it is.

FI? sounds like balls out fun, but too many legal issues here for me.
so, looking at the normal NA mods; gain a little power where you can & try to drop some weight
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R fr ARB•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•
Appreciate 0
      08-23-2012, 03:19 PM   #4
mousitch
Dark Sider
mousitch's Avatar
United_States
25
Rep
1,737
Posts

Drives: 2008 Space Gray Z4MC
Join Date: Jan 2010
Location: Missouri

iTrader: (11)

Garage List
Send a message via Yahoo to mousitch
When I had my AA headers they got hot enough to boil the windshield fluid out of the cleaning jets on to my nice clean hood. Very frustrating. I would do it and will do it on my euro headers.
__________________


2008 Space Grey M Coupe-RPI Scoop-Gruppe M CAI-Eisenmann Race Cans-RE X-pipe-ECU Remap-H&R Sport springs-Zeck CDV-Stock Gloss black powder coated wheels-LED Tekarbon Angel Eyes Project-Michelin Super Sports-Hardwired Escort 9500ix-BMW CCA Member-ST Louis Chapter
Appreciate 0
      08-23-2012, 03:25 PM   #5
Beedub
Brigadier General
United Kingdom
67
Rep
4,311
Posts

Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

Quote:
Originally Posted by mousitch View Post
When I had my AA headers they got hot enough to boil the windshield fluid out of the cleaning jets on to my nice clean hood. Very frustrating. I would do it and will do it on my euro headers.

WOW!!!

interestingly ive never had such an issue with my stock euro headers...
thats the thing with aftermarket manifolds.... bmw spend millions and millions on working out where heat is leaving the manifold right down to the shape....

i know for a fact... the aftermarket just simply CANT apply this level of detail....

as well as being free flowing the headers have to disperse heat and a certain way and equal way at that.....
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      08-23-2012, 05:11 PM   #6
mousitch
Dark Sider
mousitch's Avatar
United_States
25
Rep
1,737
Posts

Drives: 2008 Space Gray Z4MC
Join Date: Jan 2010
Location: Missouri

iTrader: (11)

Garage List
Send a message via Yahoo to mousitch
Quote:
Originally Posted by Beedub View Post
WOW!!!

interestingly ive never had such an issue with my stock euro headers...
thats the thing with aftermarket manifolds.... bmw spend millions and millions on working out where heat is leaving the manifold right down to the shape....

i know for a fact... the aftermarket just simply CANT apply this level of detail....

as well as being free flowing the headers have to disperse heat and a certain way and equal way at that.....
Yep. Started the summer after I put the AA's in. Didnt notice the first fall because of lower ambient temps, but in the heat of summer it would expand the fluid enough to bubble out of the windshield washer nozzles. The AA's were real reflective too, maybe that was a contributing factor to radiating the heat.
__________________


2008 Space Grey M Coupe-RPI Scoop-Gruppe M CAI-Eisenmann Race Cans-RE X-pipe-ECU Remap-H&R Sport springs-Zeck CDV-Stock Gloss black powder coated wheels-LED Tekarbon Angel Eyes Project-Michelin Super Sports-Hardwired Escort 9500ix-BMW CCA Member-ST Louis Chapter
Appreciate 0
      08-23-2012, 05:50 PM   #7
Caddyshk
M = Midlife Crisis
Caddyshk's Avatar
Canada
23
Rep
1,943
Posts

Drives: 2006 Z4MC Interlagos
Join Date: May 2007
Location: Fort Erie, Ontario, Canada

iTrader: (0)

__________________
2006 Z4MC - #LL93158
SS Race Cans, RE X Pipe, DKF Sec 1, Fabspeed Headers, OE STB, AS Shifter, Dave Z CDV, GC Coil Overs, Stoptech lines, Hawk DTC Pads, RE Clutch Stop, RE Transmission Mounts, Vibra-Technics Engine Mounts, Poly FCAB & RTAB, LeatherZ M Shift Boot, Tekarbon Rear Spoiler, CF Grills, Advan RS DGM
Appreciate 0
      08-23-2012, 08:44 PM   #8
RobMCoupe
Captain
RobMCoupe's Avatar
8
Rep
726
Posts

Drives: 2007 Z4 M Coupe
Join Date: Feb 2010
Location: Bay Area

iTrader: (4)

I voted no because of visual smog inspection concern.
Appreciate 0
      08-23-2012, 09:10 PM   #9
Finnegan
Major General
Finnegan's Avatar
United_States
95
Rep
6,692
Posts

Drives: Sapphire Black/Black Z4Mc
Join Date: Oct 2008
Location: At the track..or wishing I were at the track

iTrader: (18)

Quote:
Originally Posted by RobMCoupe View Post
I voted no because of visual smog inspection concern.
That's why if I ever get enough free time to do mine, they're not getting a coating. The Euros look stock, and that's just what I want them to look like.
Appreciate 0
      08-23-2012, 09:27 PM   #10
inTgr8r
Major General
inTgr8r's Avatar
Canada
132
Rep
8,428
Posts

Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

^^
^good points.
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R fr ARB•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•
Appreciate 0
      08-23-2012, 10:27 PM   #11
mfanatic325
///M-fanatic
mfanatic325's Avatar
Taiwan
55
Rep
3,746
Posts

Drives: '07 Z4MC, '04 325Ci
Join Date: Oct 2007
Location: Cupertino, CA.

iTrader: (20)

Garage List
I used black VHT header paint on my JVTs before I installed them, and it only cost me like $10 for the spray can. Turned out very clean, as my friend helped me spray them, and he's done lots of paint work before
__________________
VF570 S/C|TIAL BOV|SetRabCooler|Brembo GT 6/4|TE37s|PSSs|KW V3s|SS Race Mufflers/X-pipe|JVT Headers|AS SSK|VibraTechnic Mounts|Sparco Pro2000/6pt.Harness|MS FloorMounts|SE Custom Harness Bar|Tekarbon Angels|M-Tech Pedals|OE Strut Bar|RE RSMs|8000K D2S|CDV DEL|CF Roof Wrap|MB Grills|UUC TrannyMounts/ClutchStop|V1 Mount|P3C Gauge
Appreciate 0
      08-23-2012, 10:38 PM   #12
ZStig
Major General
112
Rep
7,270
Posts

Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

I had mine coated with the upper level one, in grey color. Why? Because underhood temps are significantly reduced, and I can almost touch them when they're "hot". Very little heat radiates from them. Great for FI application
__________________
Appreciate 0
      08-24-2012, 11:56 AM   #13
Blind32
Certified Adrenaline Junkie
Blind32's Avatar
United_States
16
Rep
1,318
Posts

Drives: '07 Z4MC
Join Date: Sep 2009
Location: Dallas TX

iTrader: (2)

Send a message via AIM to Blind32 Send a message via Yahoo to Blind32
Jet hotted my headers.

2nd thing I have jet hotted. First thing was my turbo manifold for 91 Miata. I used to run with a group of turbo'd miatas and there was a significant difference in under hood temps for the manifolds that were jet hotted vs those that were not using the same turbo kit.
Appreciate 0
      08-24-2012, 12:16 PM   #14
inTgr8r
Major General
inTgr8r's Avatar
Canada
132
Rep
8,428
Posts

Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

^ FI, I can definitely understand.
It just seems like a little overkill on a NA motor.

You would think that eliminating the header CATs would let things run cooler than OE.
I was surprised that mousitch had the problem with his AA's ....seems strange.
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R fr ARB•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•
Appreciate 0
      08-24-2012, 12:29 PM   #15
EMP07
First Lieutenant
EMP07's Avatar
7
Rep
309
Posts

Drives: Z4M
Join Date: Dec 2008
Location: Bay Area

iTrader: (6)

I did it, and left the heat shield off.

It makes a difference. Noticed (not measured), that car warms up a bit quicker as well.
__________________
BSM Z4M Coupe
Appreciate 0
      08-24-2012, 12:39 PM   #16
Z4-VILLA
Banned
Afghanistan
44
Rep
2,460
Posts

Drives: Z4M Hardtop Roadster
Join Date: Feb 2009
Location: Classified

iTrader: (0)

Send a message via ICQ to Z4-VILLA
ha!
Appreciate 0
      08-24-2012, 12:40 PM   #17
inTgr8r
Major General
inTgr8r's Avatar
Canada
132
Rep
8,428
Posts

Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

Quote:
Originally Posted by Z4-VILLA View Post
ha!
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R fr ARB•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•
Appreciate 0
      08-24-2012, 01:08 PM   #18
Z4-VILLA
Banned
Afghanistan
44
Rep
2,460
Posts

Drives: Z4M Hardtop Roadster
Join Date: Feb 2009
Location: Classified

iTrader: (0)

Send a message via ICQ to Z4-VILLA
36.36% do not understand the Powa of the Daak Sayeed. lol
Appreciate 0
      08-24-2012, 01:14 PM   #19
mousitch
Dark Sider
mousitch's Avatar
United_States
25
Rep
1,737
Posts

Drives: 2008 Space Gray Z4MC
Join Date: Jan 2010
Location: Missouri

iTrader: (11)

Garage List
Send a message via Yahoo to mousitch
Quote:
Originally Posted by inTgr8r
^ FI, I can definitely understand.
It just seems like a little overkill on a NA motor.

You would think that eliminating the header CATs would let things run cooler than OE.
I was surprised that mousitch had the problem with his AA's ....seems strange.
That's how things work in my world. If it's one out of hundred, I'd be the one. For instance if 1 of 100 sets of AA headers had an issue, I guarantee that set be handpicked for me. But yes, I've never heard of this issue either but I'm sure it was related.
__________________


2008 Space Grey M Coupe-RPI Scoop-Gruppe M CAI-Eisenmann Race Cans-RE X-pipe-ECU Remap-H&R Sport springs-Zeck CDV-Stock Gloss black powder coated wheels-LED Tekarbon Angel Eyes Project-Michelin Super Sports-Hardwired Escort 9500ix-BMW CCA Member-ST Louis Chapter
Appreciate 0
      08-24-2012, 01:36 PM   #20
inTgr8r
Major General
inTgr8r's Avatar
Canada
132
Rep
8,428
Posts

Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

Quote:
Originally Posted by mousitch View Post
That's how things work in my world. If it's one out of hundred, I'd be the one. For instance if 1 of 100 sets of AA headers had an issue, I guarantee that set be handpicked for me. But yes, I've never heard of this issue either but I'm sure it was related.
Were you able to reinstall the heat shield with the AA headers?
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R fr ARB•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•
Appreciate 0
      08-24-2012, 02:46 PM   #21
mousitch
Dark Sider
mousitch's Avatar
United_States
25
Rep
1,737
Posts

Drives: 2008 Space Gray Z4MC
Join Date: Jan 2010
Location: Missouri

iTrader: (11)

Garage List
Send a message via Yahoo to mousitch
Quote:
Originally Posted by inTgr8r View Post
Were you able to reinstall the heat shield with the AA headers?
Yes. Not an issue at all. in fact the only issue I had was one or two of the studs backed out woith the bolt. Easy install. Took my time at 10 hours. The O2 sensors were kind of a bitch. Used a Harbor freight removal socket. I will search out a better tool next time. Easy to twist the wires and damage.
__________________


2008 Space Grey M Coupe-RPI Scoop-Gruppe M CAI-Eisenmann Race Cans-RE X-pipe-ECU Remap-H&R Sport springs-Zeck CDV-Stock Gloss black powder coated wheels-LED Tekarbon Angel Eyes Project-Michelin Super Sports-Hardwired Escort 9500ix-BMW CCA Member-ST Louis Chapter
Appreciate 0
      08-24-2012, 03:51 PM   #22
DanFromTucson
Private First Class
United_States
1
Rep
150
Posts

Drives: Z4 M Coupe
Join Date: Aug 2011
Location: Austin, TX

iTrader: (0)

FYI, coating the headers helps retain heat, which helps with exhaust gas velocity and adds a few horsepower. It also lowers underhood temps as others have mentioned.

Additionally, it helps the cats get up to operating temperature sooner, so it helps with emissions.
Appreciate 0
Post Reply

Bookmarks

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


All times are GMT -4. The time now is 10:07 PM.




zpost
zpost
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST