EGT's on 7.3
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EGT's on 7.3
A freind of mine has a Superchip programmer on his 2003 7.3. He usually backs out of it when the pyro hits 1200. My question is can he take it any higher? He has a straight pipe on it but hasnt done anything to the intake.
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He can...provided he doesn't stay up there too long. 1200 is the highest sustained EGT you'll want to have. Aluminium, as in pistons, starts to melt at about 1250.
He can...provided he doesn't stay up there too long. 1200 is the highest sustained EGT you'll want to have. Aluminium, as in pistons, starts to melt at about 1250.
Last edited by cookie88; Mar 26, 2006 at 07:35 PM.
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Originally Posted by jtharvey
The exact melting point of aluminum is 1220.666 °F. Your friend is smart to back off at 1200 degrees.
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Your right cookie, aluminums melting point depends on the other metal alloys introduced in its forging proccess. In a sense the melting point of aluminum is never the same, like a snow flake there never the exact same.
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Originally Posted by jtharvey
The exact melting point of aluminum is 1220.666 °F. Your friend is smart to back off at 1200 degrees.
i still would back off at 1200
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Originally Posted by cookie88
Does that account for the other metals introduced during the forging process?
Like stated, someone would need to take into account the process the piston was manufactured to find the true melting point, as well as the cooling effects of the rest of the engine. I wasn't trying to say that our pistons will melt at that temp, just that temp is a good safe place to keep your EGT's under.It would probably take a lot more than 1300 degrees to melt the pistons in our engines, given all the other factors. But, I'm not going to play test subject. Also, there's more to it than just the possibility of melting a piston. You have to take into account the expansion rate of the piston versus the cylinder. The piston will expand faster than the cylinder, and at hight EGTs, it could cause some serious scarring of the cylinder walls.
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Originally Posted by jtharvey
It would probably take a lot more than 1300 degrees to melt the pistons in our engines, given all the other factors. But, I'm not going to play test subject. Also, there's more to it than just the possibility of melting a piston. You have to take into account the expansion rate of the piston versus the cylinder. The piston will expand faster than the cylinder, and at hight EGTs, it could cause some serious scarring of the cylinder walls.
yup thats exactly why you dont want to race a cold engine
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Originally Posted by jtharvey
Also, there's more to it than just the possibility of melting a piston. You have to take into account the expansion rate of the piston versus the cylinder. The piston will expand faster than the cylinder, and at hight EGTs, it could cause some serious scarring of the cylinder walls.
BOOM!!
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From: Cabot, Arkansas
Originally Posted by jyharvey
Like stated, someone would need to take into account the process the piston was manufactured to find the true melting point, as well as the cooling effects of the rest of the engine. I wasn't trying to say that our pistons will melt at that temp, just that temp is a good safe place to keep your EGT's under.
Google the forged material (2618-T61) to find the actual melting point....might scare ya'a little bit (1180*F)
Last edited by cookie88; Mar 26, 2006 at 08:51 PM.
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Originally Posted by Hitchpin
Thanks Guys, you answered my question, and then some.
That's what we tend to do here. Answer you question, and load you up with extra knowledge. After a week or two of poking around here, you'll probably know more about the PSD than you though you would. 
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