how can you guys turn the fuel up so much?
#31
08-18-2009, 08:20 PM
#32
08-18-2009, 08:36 PM
Post Fiend
A pyrometer uses a thermocouple (or temperature sensor) placed in the exhaust plumbing to directly measure the temperature of the exhaust gasses.
The best place to measure EGT is as close to the piston as possible in diesel applications, because your main concern is making sure you are not over fueling your engine and over heating your pistons. In practical application on the IDI engines, the exhaust manifold works best. You will need to drill a hole in your manifold and tap it to accepta1/8" NPT male fitting.
Placement of the thermocouple after the turbo will not help you if you are trying to maximize the amount fuel you feed your truck because the turbo cools the exhaust gas, and does not show the vast temperature spikes that will melt your pistons.
As far as gauge placement in the cab, I have mine mounted on the A-pillar using an Autometer triple gauge pod.
The best place to measure EGT is as close to the piston as possible in diesel applications, because your main concern is making sure you are not over fueling your engine and over heating your pistons. In practical application on the IDI engines, the exhaust manifold works best. You will need to drill a hole in your manifold and tap it to accepta1/8" NPT male fitting.
Placement of the thermocouple after the turbo will not help you if you are trying to maximize the amount fuel you feed your truck because the turbo cools the exhaust gas, and does not show the vast temperature spikes that will melt your pistons.
As far as gauge placement in the cab, I have mine mounted on the A-pillar using an Autometer triple gauge pod.
#34
08-18-2009, 11:04 PM
The worst thing about after the turbo is the turbo absorbs heat, but at different rates depending on the temp of the turbo.
So when you read the numbers, you don't know if you should be subtracting 300 degrees, 200 degrees or what.
Safe rule of thumbs if the thermocouple is after turbo, 950 is the max EGT you should run and that would be like running 1250 on a thermocouple mounted in the manifold.
Why guess, put it in the manifold and know exactly what is going on.
And yes there are piston cooling jets that spray oil on the piston bottoms.
But that is putting all that heat right in the engine oil.
So when you read the numbers, you don't know if you should be subtracting 300 degrees, 200 degrees or what.
Safe rule of thumbs if the thermocouple is after turbo, 950 is the max EGT you should run and that would be like running 1250 on a thermocouple mounted in the manifold.
Why guess, put it in the manifold and know exactly what is going on.
And yes there are piston cooling jets that spray oil on the piston bottoms.
But that is putting all that heat right in the engine oil.
#35
08-19-2009, 11:27 AM
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well said ididieseljohn I plan on keeping my truck pretty close to stock I dont want anything to break. Plus these turboless diesels just sound amazing
#37
08-19-2009, 01:02 PM
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#38
08-19-2009, 01:05 PM
#39
08-19-2009, 01:15 PM
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#41
08-19-2009, 04:09 PM
Then the day after you do that you'll rear-end someone like me (massive rear bumper) and when your front end is all effed-up you'll be kicking yourself in the butt for taking the plow mounts off. I actually have some of my cow-catcher welded up to the frame, and so are the factory bumper brackets, and there is more to come in a few days - drilling would be preferred I guess, but I get real sick of drilling 1/2" holes in thick steel, it's just a pain!
#42
08-19-2009, 04:16 PM
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Then the day after you do that you'll rear-end someone like me (massive rear bumper) and when your front end is all effed-up you'll be kicking yourself in the butt for taking the plow mounts off. I actually have some of my cow-catcher welded up to the frame, and so are the factory bumper brackets, and there is more to come in a few days - drilling would be preferred I guess, but I get real sick of drilling 1/2" holes in thick steel, it's just a pain!
#44
08-19-2009, 10:50 PM
#45
08-20-2009, 05:52 AM
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84F250 cant you just make a bumper that bolts on to your plow mounts? If not bring your biggest suitcase over to aus on holiday and we'll knock something up out back in the toyshop.
The TOY SHOP! 2000 SQUARE FEET OF WIFE FREE ZONE! FLUORO LIGHTING, SHOP AIR, TV, THREE PHASE POWER AND OF COURSE "THE BEER FRIDGE".
The TOY SHOP! 2000 SQUARE FEET OF WIFE FREE ZONE! FLUORO LIGHTING, SHOP AIR, TV, THREE PHASE POWER AND OF COURSE "THE BEER FRIDGE".