intercoolor
i ain't rite
Joined: Mar 2005
Posts: 65,449
Likes: 5,518
From: Marlboro Mental Hospital.
I smoked two pistons wich had me rebuild my IDI twice.
Now it has an intercooler and it has made it past 10,000 miles
without smoking a rear piston like before without using an intercooler.
The power is much better the engine behaves much better and
my EGTs are below 1000F when running it hard.
My actual psi went from 12psi MAX to over 15psi I need a 20psi gauge now.
But driving it is easy to get the power I need at about 12/14 psi.
Intercooler=less engine damage
Javier
Now it has an intercooler and it has made it past 10,000 miles
without smoking a rear piston like before without using an intercooler.
The power is much better the engine behaves much better and
my EGTs are below 1000F when running it hard.
My actual psi went from 12psi MAX to over 15psi I need a 20psi gauge now.
But driving it is easy to get the power I need at about 12/14 psi.
Intercooler=less engine damage
Javier
you did not melt the engine because you did not have a intercooler, you melted the engine because you had the fuel turned up too high and ran high EGT's.
i have put over 480,000 miles on my 88 without an intercooler, and never once saw EGT's over 900 degrees.
Tuned
Joined: Apr 2010
Posts: 320
Likes: 1
From: Vancouver Island, BC
The compressed intake air is NOT hot because the turbo acts as a heat exchanger evening out the temperatures. It is hot because when a gas is compressed it gets hot. The opposite is also true, that's why the propane tank on a BBQ gets cold. Intake air on a belt driven supercharger would also get just as hot from the compressor even though there are no hot exhaust gases going through the supercharger. Intercoolers are a great upgrade for both turbocharged and supercharged engines because they remove the heat in the intake air that was created during compression.
Elder User
Joined: Aug 2007
Posts: 589
Likes: 2
From: Nutter Fort,West Virginia
insulate it from the heads. i know i can get plastic spacers for the intake on my car, just curious if something would be possible for our trucks.
Posting Guru
Joined: Feb 2013
Posts: 1,203
Likes: 0
The compressed intake air is NOT hot because the turbo acts as a heat exchanger evening out the temperatures. It is hot because when a gas is compressed it gets hot. The opposite is also true, that's why the propane tank on a BBQ gets cold. Intake air on a belt driven supercharger would also get just as hot from the compressor even though there are no hot exhaust gases going through the supercharger. Intercoolers are a great upgrade for both turbocharged and supercharged engines because they remove the heat in the intake air that was created during compression.
But jonny are you saying that the 600-1200 degree air on the hot side of the turbo that is conected to the cold side by a bunch of fins that not only compress air or drive the trubo, also act as heat sinks. dosen't matter all of the heat that you would be trying to get rid of is from compression it's self.
The igtion temp for diesel is 410f it takes at least 260psi of crancking pressure and the help of glow pulgs to reach that on a 6.9
Posting Guru
Joined: Feb 2013
Posts: 1,203
Likes: 0
Anything is possable, except for me learning to spel right, You would have to do a custom intake
Senior User
Joined: Feb 2013
Posts: 171
Likes: 0
From: Miami Fl
Yes fuel turned up possible, but bought the truck in 99 and never
pulled the plate to adjust.
Did rebuild the IP later.
A combination of issues help score the cylinder twice for me.
Lower hose collapsing shut at road speed.
And the lack of intercooler with a well built IP.
I did have an EGT gauge and monitored it, never noticed it over
1000F
Anyway it is handleing my abuse now just fine.
Javier
Senior User
Joined: Mar 2013
Posts: 274
Likes: 0
From: aouth east idaho
Cylinder walk scoring is caused from:
Damaged rings on installation or age or ping or whatever
Oil- bad dirty old oil that can't do it's job cuz it's worn out
Clearences- if the clearances don't allow oil to pass down the Mains to be flung on the walls then they will scrape the walls. Bad clearances can be poor machine work, old age, installation errors
Or maybe oil pump has seen better days.
Pistons don't just hit the cylinder walls for no reason either oiling system or oil itself is the problem. Plastiguage can tells a million stories
Damaged rings on installation or age or ping or whatever
Oil- bad dirty old oil that can't do it's job cuz it's worn out
Clearences- if the clearances don't allow oil to pass down the Mains to be flung on the walls then they will scrape the walls. Bad clearances can be poor machine work, old age, installation errors
Or maybe oil pump has seen better days.
Pistons don't just hit the cylinder walls for no reason either oiling system or oil itself is the problem. Plastiguage can tells a million stories
Senior User
Joined: Jan 2013
Posts: 327
Likes: 0
From: West Aus
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