Gary Lewis Posted April 17, 2021 Share Posted April 17, 2021 Different surfaces have different emissivity. The IR gun would have a vastly different reading on chrome or flat black at exactly the same temperature. Masking tape seems a happy medium for my inexpensive gun, which is difficult to change modes or recalibrate. It correlates with actual coolant temp, as determined by a immersion thermometer that is lab grade. (Remember Omega Engineering, industrial park off Hope, between Glenbrook and Springdale?) Since the thermostat housing can be chrome, or covered in corrosion, or greasy, or powder coated, or... I always suggest masking tape since it gives a solid baseline. Jim - Is that blue or beige or? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted April 17, 2021 Share Posted April 17, 2021 Jim - Is that blue or beige or? We didn't have blue back then, but a side by side test is in order! Link to comment Share on other sites More sharing options...
Gary Lewis Posted April 17, 2021 Share Posted April 17, 2021 We didn't have blue back then, but a side by side test is in order! Go for it! (I'm cleaning the shop and have vowed not to work on the truck or do other "fun" stuff until I get it presentable. ) Link to comment Share on other sites More sharing options...
FuzzFace2 Posted April 17, 2021 Share Posted April 17, 2021 Different surfaces have different emissivity. The IR gun would have a vastly different reading on chrome or flat black at exactly the same temperature. Masking tape seems a happy medium for my inexpensive gun, which is difficult to change modes or recalibrate. It correlates with actual coolant temp, as determined by a immersion thermometer that is lab grade. (Remember Omega Engineering, industrial park off Hope, between Glenbrook and Springdale?) Since the thermostat housing can be chrome, or covered in corrosion, or greasy, or powder coated, or... I always suggest masking tape since it gives a solid baseline. Well that put that way I can under stand it and the reason too! Your IR gun has to be better than mine (HF cheapy) if it has the probe. Yes I do remember Omega IIRC had a uncle that worked there for a bit. Dave ---- ps just got the blue or tan or .... Guess as long as you use the same color all the time, me I think green as it is on my paint masking rack. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted April 17, 2021 Share Posted April 17, 2021 Different surfaces have different emissivity. The IR gun would have a vastly different reading on chrome or flat black at exactly the same temperature. Masking tape seems a happy medium for my inexpensive gun, which is difficult to change modes or recalibrate. It correlates with actual coolant temp, as determined by a immersion thermometer that is lab grade. (Remember Omega Engineering, industrial park off Hope, between Glenbrook and Springdale?) Since the thermostat housing can be chrome, or covered in corrosion, or greasy, or powder coated, or... I always suggest masking tape since it gives a solid baseline. Well that put that way I can under stand it and the reason too! Your IR gun has to be better than mine (HF cheapy) if it has the probe. Yes I do remember Omega IIRC had a uncle that worked there for a bit. Dave ---- ps just got the blue or tan or .... Guess as long as you use the same color all the time, me I think green as it is on my paint masking rack. My gun doesn't have an immersion thermometer. I used an Omega thermometer in the thermal vacuum switch port while I was taking readings with the IR gun. I'm a bit busy to make comparisons today. I torched my bumper off this morning. But I have 3M body man yellow, and maybe some green Frog Tape, so I will add them to the mix (when I do it) Link to comment Share on other sites More sharing options...
kramttocs Posted April 21, 2021 Author Share Posted April 21, 2021 My gun doesn't have an immersion thermometer. I used an Omega thermometer in the thermal vacuum switch port while I was taking readings with the IR gun. I'm a bit busy to make comparisons today. I torched my bumper off this morning. But I have 3M body man yellow, and maybe some green Frog Tape, so I will add them to the mix (when I do it) I think a comparison would be great and happy to participate as well. My unit is a HF type and my housing isn't stock but can take measurements. Spoke about needing a throttle kicker for a/c when idling. See what you guys think about this: Link to comment Share on other sites More sharing options...
Gary Lewis Posted April 21, 2021 Share Posted April 21, 2021 I think a comparison would be great and happy to participate as well. My unit is a HF type and my housing isn't stock but can take measurements. Spoke about needing a throttle kicker for a/c when idling. See what you guys think about this: That seems to work well, Scott. But what is it? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted April 22, 2021 Share Posted April 22, 2021 I think a comparison would be great and happy to participate as well. My unit is a HF type and my housing isn't stock but can take measurements. Spoke about needing a throttle kicker for a/c when idling. See what you guys think about this: I have the same question as Gary, but comments are turned off..... Does your Horrid Fate IR thermometer have adjustable emissivity? They are really good for quickly finding which cylinder is dead (without having to pull plug wires one at a time) My Holley is not nearly as pretty as yours. Link to comment Share on other sites More sharing options...
kramttocs Posted April 22, 2021 Author Share Posted April 22, 2021 I have the same question as Gary, but comments are turned off..... Does your Horrid Fate IR thermometer have adjustable emissivity? They are really good for quickly finding which cylinder is dead (without having to pull plug wires one at a time) My Holley is not nearly as pretty as yours. I don't believe it does. Pretty sure it only has C/F and then laser dot on/off. Meant to reply last night but ended up pulling the od, transmission, clutch, and flywheel off the 80 and it got too late. I was about to order the Holley throttle stop but really didn't want to. Despite the assurances by the support tech that the bracket would fit and not interfere with the kickdown bracket, I can't say I believe them. Nor do I really like having to tap the throttle before it take effect. Came across a post that mentioned using a solenoid to switch between ported and manifold vacuum for this vac adv. Had to rearranged some lines but now the two ports on the front base of the carb go into this unit and the single out goes to the vac adv. Will end up mounting it to the carb heat shield but seems like it will work. Here is the switch Can't complain about the price (esp compared to the Holley throttle stop) and the quality is what you'd expect. Looks a little cheap but if it works... Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted April 22, 2021 Share Posted April 22, 2021 I don't believe it does. Pretty sure it only has C/F and then laser dot on/off. Meant to reply last night but ended up pulling the od, transmission, clutch, and flywheel off the 80 and it got too late. I was about to order the Holley throttle stop but really didn't want to. Despite the assurances by the support tech that the bracket would fit and not interfere with the kickdown bracket, I can't say I believe them. Nor do I really like having to tap the throttle before it take effect. Came across a post that mentioned using a solenoid to switch between ported and manifold vacuum for this vac adv. Had to rearranged some lines but now the two ports on the front base of the carb go into this unit and the single out goes to the vac adv. Will end up mounting it to the carb heat shield but seems like it will work. Here is the switch Can't complain about the price (esp compared to the Holley throttle stop) and the quality is what you'd expect. Looks a little cheap but if it works... My truck has the thermal vacuum switch that steps up the idle if the truck is overheating (bypassing the vacuum restriction) Link to comment Share on other sites More sharing options...
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