Author Topic: EGT port location preference?  (Read 8296 times)

Offline gregm784

  • Sr. Member
  • ****
  • Posts: 384
    • View Profile
    • Means Racing
  • Your Engine: 365" GenIV SBC
  • Your Track: Famoso Raceway
  • Your Vehicle: 1997 Stirling 200" FED
EGT port location preference?
« on: December 12, 2019, 02:31:33 PM »
I'm adding EGTs to the dragster. Is there a preference on EGT location? Short side of radius? long side of radius (aka top or bottom of zoomies)? How far from port or exh valve?
Greg
El Dorado County, CA
www.meansracing.com

Offline wideopen231

  • Hero Member
  • *****
  • Posts: 1910
    • View Profile
  • Your Best Time: 1/8 3.70@ 198 1/4 5.78@245
  • Your Engine: Hemi 526 ci alcohol
  • Your Track: Piedmont
  • Your Vehicle: 225 CMC FED
  • General Location: NORTH CAROLINA
Re: EGT port location preference?
« Reply #1 on: December 13, 2019, 03:27:21 AM »
When building a set of zoomies and customer wants EGT.  I like bottom and about 4" out if possible. The furthure out you move them the lower the  temp will be at any point,in other words. If you normally have 1050 target temps and you move EGT 2" you will probably be burning pistons around 1000*,just example. If you have data from another setup put them as close to same distance as possible,if not then its where you like them. As for bottom I have been told some data recorder company's want them on top.IMO if you have probe center of pipe it should not matter.
Relecting obama is like shooting right foot because it did not hurt enough when you shot left foot

Offline gregm784

  • Sr. Member
  • ****
  • Posts: 384
    • View Profile
    • Means Racing
  • Your Engine: 365" GenIV SBC
  • Your Track: Famoso Raceway
  • Your Vehicle: 1997 Stirling 200" FED
Re: EGT port location preference?
« Reply #2 on: June 02, 2020, 11:02:31 PM »
Finally warmed the car up with EGTs....

Idling temps are 150-200 for #1 & #2.  Rest are around 1000*

Numbers in picture are holding the RPM at 3500 for about 4 seconds. 

My thoughts are it is pretty fat on the barrel valve and burning the fuel in the pipes.  30* in the mag, 387" SBC, 671 on alcohol.
Greg
El Dorado County, CA
www.meansracing.com

Offline wideopen231

  • Hero Member
  • *****
  • Posts: 1910
    • View Profile
  • Your Best Time: 1/8 3.70@ 198 1/4 5.78@245
  • Your Engine: Hemi 526 ci alcohol
  • Your Track: Piedmont
  • Your Vehicle: 225 CMC FED
  • General Location: NORTH CAROLINA
Re: EGT port location preference?
« Reply #3 on: June 27, 2020, 06:16:19 AM »
I would agree with urning fuel in pipes. Not all cars run same temps abd location is part of it.  My Top alcohol setup where  650 stage at 6500 and 1050 or less at finish line. At 1100 car needed bearing checked probably flattened few thou.At 1150 It probably needed a new piston in the hole. AGain not all are same. Plugs and bearings will talk to you if you listen to them. EGT are great for tuning if used correctly and best for keeping track of tune.
Relecting obama is like shooting right foot because it did not hurt enough when you shot left foot

Offline gregm784

  • Sr. Member
  • ****
  • Posts: 384
    • View Profile
    • Means Racing
  • Your Engine: 365" GenIV SBC
  • Your Track: Famoso Raceway
  • Your Vehicle: 1997 Stirling 200" FED
Re: EGT port location preference?
« Reply #4 on: July 07, 2020, 11:32:13 AM »
We've now got one race (5 laps) on the data recorder.  EGTs are fun to watch.  nice even readings, minus the front two, which are expectedly cooler (hat nozzles only, roots blower pushing fuel forward)
Greg
El Dorado County, CA
www.meansracing.com

Offline jeff/21

  • Full Member
  • ***
  • Posts: 186
    • View Profile
  • Your Best Time: 8.24
  • Your Track: any with-in a 6hr radius
  • Your Vehicle: fed
Re: EGT port location preference?
« Reply #5 on: July 07, 2020, 05:11:06 PM »
I moved injectors around and were of different sizes 406 brodix heads 6-71 littlefield and all cylinders were close at 2500 didn't make any difference in the 1/4

Offline Davidshorm

  • Newbie
  • *
  • Posts: 2
    • View Profile
    • Гипоккамп
  • Your Best Time: http://forumssity.ru/
  • Your Engine: http://forumssity.ru/
  • Your Track: http://forumssity.ru/
  • Your Vehicle: http://forumssity.ru/
  • General Location: http://forumssity.ru/
-
« Reply #6 on: January 23, 2022, 07:15:19 PM »
At me a similar situation. I invite to discussion.

 
  ,  ,    .         .        ,        .
 
   ,   ,           ,    .        ,       .   ,         
 
Blood flow I usually stimulate erectile dysfunction blood in
The Corrado Forum Insurance Scheme with Prestige Keep Moving
Perte de tr©sorerie suite   fixing
 97e6929
medical news site