Rotary Engine Building, Porting & Swaps All you could ever want to know about rebuilding and porting your rotary engine! Discussions also on Water, Alcohol, Etc. Injection

Where to put EGT probes?

Thread Tools
 
Search this Thread
 
Old 11-21-2005 | 03:27 PM
  #1  
RussTypeS's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2005
Posts: 17
Default

I'd like to put some EGT probes in my exhaust, it's just a stock port 12a (IT motor). I've heard 1", 12", 16", does it matter? any other opinions?
Old 11-21-2005 | 03:38 PM
  #2  
TYSON's Avatar
Senior Member
 
Joined: Jan 2003
Posts: 2,871
From: London, Ontario
Default

I would say close, exhaust would be cooling down the whole time it's in the pipe. The colder the ambient temperature and the faster you're going the more it would cool down.



Mine are about 2" outboard of the exhaust flange.





http://cranked.nopistons.com/Engine-Bay/Engine_Bay_7
Old 11-21-2005 | 06:29 PM
  #3  
C. Ludwig's Avatar
Senior Member
 
Joined: Oct 2003
Posts: 352
Default

It's kind of like swapping dyno numbers. As long as you're not melting probes it doesn't matter a whole lot to an extent. You want it close enough to get a true reading. But your numbers at 6" will be different than the other guy that has his at 12" if the engines are built and tuned identically. If you're going to rely on one guy for tuning assistance go with what he suggests. Otherwise take probe location into consideration when anyone tells you "this is the EGT you're shooting for".
Old 11-21-2005 | 06:57 PM
  #4  
RussTypeS's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2005
Posts: 17
Default

Originally Posted by C. Ludwig' post='780407' date='Nov 21 2005, 06:29 PM

It's kind of like swapping dyno numbers. As long as you're not melting probes it doesn't matter a whole lot to an extent. You want it close enough to get a true reading. But your numbers at 6" will be different than the other guy that has his at 12" if the engines are built and tuned identically. If you're going to rely on one guy for tuning assistance go with what he suggests. Otherwise take probe location into consideration when anyone tells you "this is the EGT you're shooting for".


I understand this, once installed I'll be going to the dyno and tuning with A/F to determine the proper EGT. I guess my question is where won't melt the probes? Like Tyson said, I don't want ambient conditions to affect my readings, but will the turbulence directly after the exhaust port affect readings if the probes are too close?



I'm not trying to compare numbers here, just looking for the placement that will get me the most consistently accurate readings.
Old 11-21-2005 | 08:22 PM
  #5  
Lynn E. Hanover's Avatar
Fabricator
 
Joined: Jan 2004
Posts: 1,322
From: Central Ohio (Hebron) Zephyrhills Fla.
Default

Originally Posted by RussTypeS' post='780412' date='Nov 21 2005, 03:57 PM

I understand this, once installed I'll be going to the dyno and tuning with A/F to determine the proper EGT. I guess my question is where won't melt the probes? Like Tyson said, I don't want ambient conditions to affect my readings, but will the turbulence directly after the exhaust port affect readings if the probes are too close?



I'm not trying to compare numbers here, just looking for the placement that will get me the most consistently accurate readings.


One of the best buildrs in the US is Daryl Drummond. He likes them 3 inches out from the port.



He likes 1575 if you were interested.





Lynn E. Hanover
Old 11-22-2005 | 09:06 AM
  #6  
RussTypeS's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2005
Posts: 17
Default

looks like 2-3" is what I'll shoot for then, thanks guys!
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Midnightdriver
Performance Mods
5
06-27-2006 06:18 PM
setzep
Performance Mods
9
10-30-2003 09:37 PM
1Revvin7
Single Turbo Discussion
42
06-16-2003 01:21 AM
BAdAzZV8
RX-7 & RX-8 Parts For Sale & Wanted
0
10-02-2002 08:46 AM
RussellTT94
3rd Generation Specific
3
07-03-2002 09:05 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 



All times are GMT -5. The time now is 05:22 AM.