2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

Recent motor buildup pixtures

Thread Tools
 
Search this Thread
 
Old 11-06-05, 08:13 AM
  #26  
Turn up the boost
RX7Club Vendor
Thread Starter
iTrader: (12)
 
Turblown's Avatar
 
Join Date: Dec 2001
Location: Twin Cities, MN
Posts: 7,067
Received 91 Likes on 77 Posts
I guess I should give a little update on that car. I did not have time to put sensors on the car, as it left for SevenStock that weekend. But I did notice in 100deg weather, on the freeway while ragging on it in the higher rpms I could not get the coolant temp gauge to move, and oil temperature felt much much cooler, than normal. The coatings also held up inside the motor, and I did notice that at idle with the opened up exhaust there are no misfires/incomplete fires at all. I don't know how its doing for power, as there are a lot of variables involved. I will have 3 more engines done here shortly, and a uncoated one to do dyno comparisons...
Old 11-06-05, 08:38 AM
  #27  
vac leak

 
torean's Avatar
 
Join Date: Aug 2003
Location: Rutgers
Posts: 1,247
Likes: 0
Received 0 Likes on 0 Posts
Talking

excellent!....keep the pix coming
Old 11-15-05, 01:27 PM
  #28  
Turn up the boost
RX7Club Vendor
Thread Starter
iTrader: (12)
 
Turblown's Avatar
 
Join Date: Dec 2001
Location: Twin Cities, MN
Posts: 7,067
Received 91 Likes on 77 Posts
If everything goes to play I will have a side by side comparison here in the next 3/4 weeks.
Numbers will be off an Evo8 that has the intake and exhaust manifolds, along with the turbine housing and the downpipe. I'm going to also see if they will go for doing the turbine wheel also.
Old 11-15-05, 01:35 PM
  #29  
Tear you apart

iTrader: (10)
 
Jager's Avatar
 
Join Date: Aug 2004
Location: Bemidji Minnesota
Posts: 5,882
Received 33 Likes on 30 Posts
Wow, can that help at all with a header system?
Old 11-15-05, 04:31 PM
  #30  
TANSTAFL

iTrader: (13)
 
alexdimen's Avatar
 
Join Date: Oct 2003
Location: Richmond, Va.
Posts: 3,770
Received 123 Likes on 83 Posts
Originally Posted by zeromage428
gah....looking at these pictures want me to start my project....but i cant until i have stupid tickets paid off
my sentiments exactly... but that empty parking lot really was asking for it

curious as to what kind of improvements do the heat resistance coatings produce? for instance have you coated a valve and measured it's surface temp after 60 seconds of acetalene torch and compared it to a stock one? is it ceramic based?

Last edited by alexdimen; 11-15-05 at 04:34 PM.
Old 11-15-05, 08:40 PM
  #31  
kill it with BOOMSTICK!

 
Falcoms's Avatar
 
Join Date: Mar 2004
Location: McHenry, IL
Posts: 1,227
Likes: 0
Received 0 Likes on 0 Posts
I'll have to keep this in mind when doing my rebuild here shortly

EDIT: Stupid question, but how do you hold up the tranny with the engine out of the car?

Last edited by Falcoms; 11-15-05 at 08:43 PM.
Old 11-15-05, 08:47 PM
  #32  
Rotors still spinning

iTrader: (1)
 
rotarygod's Avatar
 
Join Date: Jul 2002
Location: Houston
Posts: 4,181
Likes: 0
Received 20 Likes on 14 Posts
Put a jack under it.
Old 11-15-05, 09:00 PM
  #33  
i am legendary

 
ddub's Avatar
 
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 8,478
Likes: 0
Received 1 Like on 1 Post
Originally Posted by rotarygod
Put a jack under it.
Yup. Or jack stands, or tie it to something, whatever you feel like pretty much...
Old 11-15-05, 10:25 PM
  #34  
Turn up the boost
RX7Club Vendor
Thread Starter
iTrader: (12)
 
Turblown's Avatar
 
Join Date: Dec 2001
Location: Twin Cities, MN
Posts: 7,067
Received 91 Likes on 77 Posts
Originally Posted by alexdimen
my sentiments exactly... but that empty parking lot really was asking for it

curious as to what kind of improvements do the heat resistance coatings produce? for instance have you coated a valve and measured it's surface temp after 60 seconds of acetalene torch and compared it to a stock one? is it ceramic based?
I can't say I have done that. What I have noticed is a vast decrease in oil temperatures, and much lower radiat heat from exhaust and the entire underhood area on cars. I have also been able to use much thinner exhaust tubing, whereas without the coatings they would burn up. And I no longer have to weld the inside of every exhaust flange, they are no longer breaking with the coatings. I have also been told by very reliable shops, that they have seen an increase rwhp, and a decrease in turbo lag using these coatings. I have not verified that for myself though. According to theory they should increase power(increased thermal efficiency), and longevity of parts(reflecting heat instead of trapping heat), while decreasing turbo lag( heat and the expansion of gases spool turbines), and fuel consumption(again increased thermal efficiency).

I might also note that I read in a "Factory Competetion Preparation And Service Manual" that thefactory was using molybdenum on their side and corner seals for self lubrication and longevity purposes.
We also coat all seals with the oil attraction and retention coating seen on the side irons...

Last edited by Turblown; 11-15-05 at 10:34 PM.
Old 11-15-05, 10:40 PM
  #35  
vac leak

 
torean's Avatar
 
Join Date: Aug 2003
Location: Rutgers
Posts: 1,247
Likes: 0
Received 0 Likes on 0 Posts
yup..ur in the ballpark....by keeping the heat energy in and prevent it from excaping through the metal pipes u retain the entropy of the exhaust gas...keeping the exhaust molecules highly energized so they can do more work, ie spool turbines.....it does the same thing as exhaust wraps pretty much except u can "wrap" any shape u want and the heat barrier is between the gas and the metal piping instead of the pipe and ambient air....which also reduces heat induced stress and expansion

it all looks good on paper....so i have no idea how well it works in real life

only concern i have about coating all the rotors, housings is that oil is designed lub and cool the engine somewhat..if u reduce the oil's function to cool the engine, wouldnt it run hotter?....putting more stress on the coolant cooling system?

if anything knows the specifics of enthalpy/entropy please let me know....i need some tutoring in the wonderful science of thermodynamics!
Old 11-15-05, 11:51 PM
  #36  
Turn up the boost
RX7Club Vendor
Thread Starter
iTrader: (12)
 
Turblown's Avatar
 
Join Date: Dec 2001
Location: Twin Cities, MN
Posts: 7,067
Received 91 Likes on 77 Posts
These coatings do not reduce the oils function of cooling the engine. They prevent combustion heat from getting to the parts that the oil cools( increasing thermal efficiency),and therefor reduce oil operating temperatures.
Old 11-16-05, 12:10 AM
  #37  
vac leak

 
torean's Avatar
 
Join Date: Aug 2003
Location: Rutgers
Posts: 1,247
Likes: 0
Received 0 Likes on 0 Posts
now i think about it..yeah..ur right......being that the coating is on the rotor surface....
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
C. Ludwig
Single Turbo RX-7's
49
01-30-19 06:31 AM
Heedlessone
Group Buy & Product Dev. FD RX-7
288
09-16-18 07:22 PM
meat_whistle
Introduce yourself
0
08-12-15 08:41 PM



Quick Reply: Recent motor buildup pixtures



All times are GMT -5. The time now is 12:40 PM.