where should i put my egt probe

302crew · 01-13-2003, 03:52 PM

i have an rpm air gap intake on my car and from what i understand the prope is supposed to go in the leanest cylinder which one would that be with this intake any help would be very apriciated.

saltzstang · 01-13-2003, 05:43 PM

Your talking intake ,but your titled egt(exaust gas temperature)........if your wanting to monitor exaust temp(A/F ratio) then find someone with an infrared temp gun to check temp on each of the primary tubes(exaust) while you rev the engine...the hottest tube is were you install the probe.Remember not to have egt over 1300 deg f!

Jeff Chambers · 01-14-2003, 08:12 AM

Horsehockey! My quickest ETs have always come with an EGT in the range of 1460F on #6. That's for a 306 N/A combination. Point being, that you can't believe anything anyone tells you about the 'right' EGT temperature. Its a tuning tool, and its purely qualitative, not quantitative. There are any number of parameters that affect the actual temperature measurement, some of them being: axial location on header, depth of placement in flow stream, shape/swirl of exhaust port, cam overlap, etc. So all you can do is install the probe, and start a log of EGT versus setup and keep track of how things such as jets, fuel pressure, shift points, etc. affect the EGT. Then use these trends to refine your combination and tune for weather, etc. Believe it or not, but I can see as much as 20-degrees change in EGT just by changing from Sunoco 110 to VP C12.

saltzstang · 01-14-2003, 10:21 AM

Well the egt is an excellent tuning tool if your experienced....if not you must be careful b/c it risk melting a piston...... you made some very good points that were factual but a lot of people dont understand. I'd hate to tell someone 1450 is good and they go out on my trust and destroy their engine.

saltzstang · 01-14-2003, 10:24 AM

Just trying to be conservative.

01-13-2003, 03:52 PM	#1
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	where should i put my egt probe i have an rpm air gap intake on my car and from what i understand the prope is supposed to go in the leanest cylinder which one would that be with this intake any help would be very apriciated. __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

01-13-2003, 05:43 PM	#2
saltzstang Registered Member Join Date: Sep 2002 Location: southeast texas Posts: 90	Your talking intake ,but your titled egt(exaust gas temperature)........if your wanting to monitor exaust temp(A/F ratio) then find someone with an infrared temp gun to check temp on each of the primary tubes(exaust) while you rev the engine...the hottest tube is were you install the probe.Remember not to have egt over 1300 deg f! __________________ AFR 1492 heads,Track Heat Intake, d.s.s super pro bullet 331, lakewood bell, king cobra, 3550 ,UPR shifter, aluminum shaft, 4.10, 31-spline, spool,hoosier27x10, moroso ds-2, 175-juice, egt...11.40 on motor spray pass coming.

01-14-2003, 08:12 AM	#3
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Horsehockey! My quickest ETs have always come with an EGT in the range of 1460F on #6. That's for a 306 N/A combination. Point being, that you can't believe anything anyone tells you about the 'right' EGT temperature. Its a tuning tool, and its purely qualitative, not quantitative. There are any number of parameters that affect the actual temperature measurement, some of them being: axial location on header, depth of placement in flow stream, shape/swirl of exhaust port, cam overlap, etc. So all you can do is install the probe, and start a log of EGT versus setup and keep track of how things such as jets, fuel pressure, shift points, etc. affect the EGT. Then use these trends to refine your combination and tune for weather, etc. Believe it or not, but I can see as much as 20-degrees change in EGT just by changing from Sunoco 110 to VP C12. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

01-14-2003, 10:21 AM	#4
saltzstang Registered Member Join Date: Sep 2002 Location: southeast texas Posts: 90	Well the egt is an excellent tuning tool if your experienced....if not you must be careful b/c it risk melting a piston...... you made some very good points that were factual but a lot of people dont understand. I'd hate to tell someone 1450 is good and they go out on my trust and destroy their engine. __________________ AFR 1492 heads,Track Heat Intake, d.s.s super pro bullet 331, lakewood bell, king cobra, 3550 ,UPR shifter, aluminum shaft, 4.10, 31-spline, spool,hoosier27x10, moroso ds-2, 175-juice, egt...11.40 on motor spray pass coming.

01-14-2003, 10:24 AM	#5
saltzstang Registered Member Join Date: Sep 2002 Location: southeast texas Posts: 90	Just trying to be conservative. __________________ AFR 1492 heads,Track Heat Intake, d.s.s super pro bullet 331, lakewood bell, king cobra, 3550 ,UPR shifter, aluminum shaft, 4.10, 31-spline, spool,hoosier27x10, moroso ds-2, 175-juice, egt...11.40 on motor spray pass coming.

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