Go Back  RX7Club.com - Mazda RX7 Forum > Tech and Performance > Race Car Tech
Reload this Page >

Road race/circuit turbo cars heat management.

Race Car Tech Discuss anything related to road racing and auto X.

Road race/circuit turbo cars heat management.

Old 04-10-14, 03:11 PM
  #26  
just dont care.
iTrader: (6)
 
jacobcartmill's Avatar
 
Join Date: Jul 2002
Location: Nashville, TN
Posts: 9,386
Likes: 0
Received 2 Likes on 2 Posts
here is my setup for anyone curious:

i have DEI titanium wrap on the downpipe (except the flex section), a custom turbine heat shield made by my fabricator buddy, and a 12x12 inconel shield from turbosource.com (these are very nice and easy to work with)

turbo setup is a borg warner EFR 8374 internal wastegate turbo with shorty manifold BTW.



jacobcartmill is offline  
Old 04-10-14, 04:41 PM
  #27  
1308ccs of awesome
iTrader: (9)
 
eage8's Avatar
 
Join Date: Sep 2003
Location: Woodbine, MD
Posts: 6,176
Received 10 Likes on 10 Posts
I have a turblown LIM heat shield too, it's definitely pretty nice.

My swain-tech ceramic coated downpipe/manifold/turbine + the LIM heat shield:

eage8 is offline  
Old 04-11-14, 11:55 AM
  #28  
Senior Member
10 Year Member
iTrader: (4)
 
Join Date: Nov 2005
Location: Calgary
Posts: 352
Likes: 0
Received 1 Like on 1 Post
Road race car, typical session is 20 minutes. I ran a turbo blanket for 2 seasons, it totally destroyed the turbine housing, cracked off the V-band flange 3 times. In the end the center of the housing was egg shaped rather than round. Add to that I've cooked off every ceramic coating I've tried, the ceramic wrap will last on the header for a while but will start to fall apart after a half dozen weekends or so. The turbo itself cooked the oil seals prematurely but lasted until it got oil starved, the bearings totally failed but the turbo was "operational". It was extremely laggy and self clearanced the wheels in the housings, but luckily didn't come right apart on me. I've since switched gears to autocross and have a different turbo with very limited heat management but for autocross I don't really care.
fd_neal is offline  
Old 04-11-14, 12:15 PM
  #29  
Lives on the Forum
iTrader: (9)
 
BLUE TII's Avatar
 
Join Date: Mar 2001
Location: CA
Posts: 7,083
Received 145 Likes on 128 Posts
I've since switched gears to autocross and have a different turbo with very limited heat management but for autocross I don't really care.

I don't have experience with road race, just 40sec to 5 minute sprints (auto-x, cart track, hillclimb) and street driving.

Keep your limited "thermal management".

My experience is thermal management of a turbo rotary is letting as much exhaust heat dissipate as possible to protect the turbo/manifold.

Even on my set up I have sagged in the shared wall of divided cast iron exhaust manifold and turbo housing where I ported it down to ~ 3/8" thick wall.

It changed shape to accommodate the flow from the curved front runner on the manifold where there is more exhaust backpressure intruding into the rear runner which is a straight shot.

This is with just the main two stock S4 turbo heatshield pieces as thermal management (very open).
BLUE TII is offline  
Old 04-18-14, 05:25 PM
  #30  
Senior Member
 
TrentO's Avatar
 
Join Date: Jul 2003
Location: Edmonton, AB, Canada
Posts: 408
Likes: 0
Received 0 Likes on 0 Posts
I've raced with Wouter and run a number of 1 hour long Indy support races. My advice is to avoid all blankets, etc and try to duct some air in where the turbo is to cool it. You can use stainless (or inconel if you need to spend more money) to make a shield which blocks the turbo heat from the intake, but leave the turbo as open as you can to encourage airflow. Possibly look into ducting some airflow into the general area if possible (my heatshield also has a little scoop)

I had a slight lean tune at low RPM during one Indy support race and the Turbo temp went through the roof and seized the shaft as we ran a number of laps under yellow.
So, my feedback, don't close any exhaust off, let it radiate the heat.

I've also warped T4 flanges so much they cannot be ground flat. I currently run a 100% V-band setup and it is wonderful. I'll never again use any kind of bolt up flange on any exhaust or turbo part.

-Trent
TrentO is offline  
Old 12-18-14, 03:43 PM
  #31  
Rotary Freak
iTrader: (8)
 
Join Date: Oct 2004
Location: FL
Posts: 2,845
Received 2 Likes on 2 Posts
How's your Swain coating holding up ?

I've had mine on my HKS down-pipe since 2005, and it's holding up VERY well, even with BNR's.

I had it on for 2+ years before going to water-injection, with no issues then, and no issues now.

This is in 100+F HPDE's running 20-25 minute sessions, and sometimes back-to-back sessions (50-minutes).

:-) neil
M104-AMG is offline  
Old 12-18-14, 04:02 PM
  #32  
1308ccs of awesome
iTrader: (9)
 
eage8's Avatar
 
Join Date: Sep 2003
Location: Woodbine, MD
Posts: 6,176
Received 10 Likes on 10 Posts
Originally Posted by M104-AMG View Post
How's your Swain coating holding up ?

I've had mine on my HKS down-pipe since 2005, and it's holding up VERY well, even with BNR's.

I had it on for 2+ years before going to water-injection, with no issues then, and no issues now.

This is in 100+F HPDE's running 20-25 minute sessions, and sometimes back-to-back sessions (50-minutes).

:-) neil
Fine, but my car has been mostly autocross duty lately.

It started doing a weird beading thing on the turbo hot side. I emailed swain about it and they said it was normal. *shrug*

eage8 is offline  
Old 12-18-14, 04:14 PM
  #33  
Rotary Freak
iTrader: (8)
 
Join Date: Oct 2004
Location: FL
Posts: 2,845
Received 2 Likes on 2 Posts
Yes, mine did that as well. No issues with it.

:-) neil
M104-AMG is offline  
Old 10-23-16, 08:51 AM
  #34  
.
iTrader: (8)
 
Join Date: May 2003
Location: US
Posts: 2,496
Likes: 0
Received 2 Likes on 2 Posts
Has anyone had any longterm road race / track experience with Turbosource's inconel turbine housing heatshield on an EFR? (paging Elliot and Shawn...)

I am considering going this route with a coated manifold, titanium wrapped downpipe, and shielded LIM; I just want to see if anyone has found this approach to work really well with regular track abuse or if anyone has found any better options for longevity and reliability since this thread was last updated


Thanks
ZumSpeedRX-7 is offline  
Old 10-28-16, 09:34 PM
  #35  
Automotive Designer
 
RGHTBrainDesign's Avatar
 
Join Date: Aug 2012
Location: San Jose, CA
Posts: 1,468
Received 41 Likes on 38 Posts
I'd be more worried about cooking everything else under the hood (electronics and paint) rather than thermal expansion ruining the turbine housing. Interesting to see this result from most of you...

I'd imagine paint on the hood to be totally gone right above the turbo without a blanket. Didn't Rob Dahm just shoot a video about this too? Not saying that he's right, just saying that the amount of heat at a certain location destroys paint and potentially harms electronics and vacuum lines in the engine bay. Mica and Inconel shielding FTW!
RGHTBrainDesign is offline  
Old 10-29-16, 03:31 AM
  #36  
Eats, Sleeps, Dreams Rotary
 
Valkyrie's Avatar
 
Join Date: Oct 2004
Location: Japanabama
Posts: 4,210
Received 6 Likes on 6 Posts
I would imagine the cheaper blankets like the one I use hold in enough heat to keep the engine bay relatively cool but let enough escape that it doesn't get so hot that anything warps... The really good blankets supposedly makes the turbo only a little hot. Mine leaves it hot enough to put your finger on it for a second, but isn't going to burn you instantly like a naked turbo will. Having only one turbo helps, though.

I mean, turbos are liquid cooled after all... so maybe increasing the size of oil coolers and the oil flow might be prudent.


Time will tell how long my turbo lists...
Valkyrie is offline  
Old 10-29-16, 10:40 AM
  #37  
Fistful of steel
iTrader: (7)
 
LargeOrangeFont's Avatar
 
Join Date: Nov 2008
Location: OC, So Cal
Posts: 2,153
Received 9 Likes on 9 Posts
Originally Posted by Valkyrie View Post
I would imagine the cheaper blankets like the one I use hold in enough heat to keep the engine bay relatively cool but let enough escape that it doesn't get so hot that anything warps... The really good blankets supposedly makes the turbo only a little hot. Mine leaves it hot enough to put your finger on it for a second, but isn't going to burn you instantly like a naked turbo will. Having only one turbo helps, though.

I mean, turbos are liquid cooled after all... so maybe increasing the size of oil coolers and the oil flow might be prudent.


Time will tell how long my turbo lists...
Increasing oil flow to the turbo is not a solution. You'll blow the seals out of the turbo.
LargeOrangeFont is online now  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Feffman
Racing Kills Lounge
0
08-15-15 06:19 AM
Engine stand ready
New Member RX-7 Technical
3
08-14-15 10:26 PM
04G35S
3rd Generation Specific (1993-2002)
4
08-14-15 07:31 AM


Thread Tools
Search this Thread
Quick Reply: Road race/circuit turbo cars heat management.


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: