[Fot] EGT gauge installation

Sun Mar 3 09:47:13 MST 2019

 Mark Craig, I don't know who put a bee in your bonnet but your comments are out of place and unappreciated and I will not get in the gutter with you. I thank God that we live in a free country so you may say what you like, I just can't spend any time on it.
Sorry, I am at Sebring this weekend and have not had a chance to answer the WHY question and as a disclaimer my response is worth about as much as you paid for it, my hope is that its helps someone out.
With all 4cyl engines that have 1,3,4,2 firing order and share a common intake runner for 1,2 and 3,4 all have the same problem, there is an over lap with the two cylinders that are in sequence concerning the intake charge and one cylinder actually robs charge from the other, and that is why when installing dual Webers the EGT reading to evens out. I personally don't care for the EGT gauges and prefer a cheap ($150) Air Fuel Ratio gauge, it does the same thing as an EGT gauge with less drama, just one fitting in the collector and done, another good thing about an O2 gauge is they read instantly where the EGT gauge take some time and the best place for the most accurate reading is at the end of the longest straight. I can say that running a dual SU's set up or a single Weber anything leaner that 12.5-7 to 1 is in the danger zone. With dual Webers I wouldn't be afraid to see 13.5-7 to 1, as far as what a good reading is for a EGT gauge its been so long since I have used one I couldn't say. I do have some brand new ones I will put on my Dyno someday but, not today ;-)

    On Friday, March 1, 2019, 5:45:23 AM EST, Tony Drews via Fot <fot at autox.team.net> wrote:  

I've always been told that about 6" from the head is where the probes should be.  Closer to the head would be slightly hotter, further away colder - but like Mark says it's awfully dang hot and a few inches is unlikely to make much difference in that.  As far as coming from front or back, that really doesn't matter - make it convenient to remove / install the probes, you'll be doing it every rebuild at least.

Regards, Tony

 On 2/28/2019 9:18 AM, John Styduhar via Fot wrote:

 The location of the EGT sensors on #1 and #4 puts it on the outside curve of the tubes.   Does it matter where I drill the hole on the bend?  I can approach it from the side or outside of the curve on both.  
  On Thu, Feb 28, 2019 at 8:46 AM DPPI - Mark Craig <info at dieselperformanceparts.com> wrote:

Yeah you always will, closest to the head outlet is best, but you also got to be able to install it and service it. 2 -2.5” away from the outlet is going to be fine. Think about it at 6-7000 RPM is an extra inch going to matter much in the overall temp?? That engine is putting out a flame front constantly like a torch, it won’t matter . Remember you always got some like Rick Parent that think they are the end all do all for all Triumph ot any other engine in the world.  Use 1 & 4 cylinders as it is a known leaner condition on them for 40 years. You want to measure the leanest place you can as you know the rest is safe as compared.  Check a lot of the cars in the pits, I have never seen one on #2 or #3, ever. 

I am no magical expert, I am just a good observer of others and that’s how I got to know what I know. 

|  

  |  

  |  
Mark Craig
 Diesel Performance Parts, Inc.
 411 Allied Drive, Nashville, TN 37211
 www.dieselperformanceparts.com
  |
|  

  |  

  |  

Phone: 615-834-0066
 Fax: 615-834-9923
 Email: mark at dieselperformanceparts.com

  |

From: John Styduhar [mailto:johnstydo at gmail.com] 
 Sent: Thursday, February 28, 2019 7:10 AM
 To: DPPI - Mark Craig <info at dieselperformanceparts.com>
 Subject: Re: [Fot] EGT gauge installation

That distance you mentioned would put the sensor about 6" from the exhaust valve.  I'm getting some difference of opinion from the membership regarding which cylinders to use.  

On Tue, Feb 26, 2019 at 5:07 PM DPPI - Mark Craig <info at dieselperformanceparts.com> wrote:

Use #1 & #4 about 2.0-2.5” from the header flange. 

|  

  |  

  |  
 Mark Craig
 Diesel Performance Parts, Inc.
 411 Allied Drive, Nashville, TN 37211
 www.dieselperformanceparts.com
  |
|  

  |  

  |  

 Phone: 615-834-0066
 Fax: 615-834-9923
 Email: mark at dieselperformanceparts.com

  |

From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of John Styduhar via Fot
 Sent: Tuesday, February 26, 2019 11:30 AM
 To: Triumph 'Friends of Triumph <fot at autox.team.net>
 Subject: [Fot] EGT gauge installation

I need some tips on installation of a dual probe EGT gauge on the TR4 race engine with twin Strombergs-

What two cylinder to use for probes.

Optimum EG temperature for tuning purposes.

Thanks 

  _______________________________________________fot at autox.team.nethttp://www.fot-racing.comDonate: http://www.team.net/donate.htmlArchive: http://www.team.net/pipermail/fotUnsubscribe/Manage: http://autox.team.net/mailman/options/fot/tony@tonydrews.com _______________________________________________
fot at autox.team.net

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://www.team.net/pipermail/fot
Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/rick.parent@att.net

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/fot/attachments/20190303/e3def7fd/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image005.jpg
Type: image/jpeg
Size: 2784 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/fot/attachments/20190303/e3def7fd/attachment-0008.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image006.png
Type: image/png
Size: 13119 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/fot/attachments/20190303/e3def7fd/attachment-0004.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.jpg
Type: image/jpeg
Size: 2472 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/fot/attachments/20190303/e3def7fd/attachment-0009.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image004.jpg
Type: image/jpeg
Size: 3083 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/fot/attachments/20190303/e3def7fd/attachment-0010.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 13118 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/fot/attachments/20190303/e3def7fd/attachment-0005.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 2153 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/fot/attachments/20190303/e3def7fd/attachment-0011.jpg>