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Case Tractors Discussion Forum
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Change from Intercooled to Aftercooled

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John Saeli

02-18-2005 15:44:13




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Hey Fellas: Anybody ever change an Intercooled CASE to Aftercooled? My Intercooler is beyond repair. New one from CASE is $975.00. Unbelievable!! I think the Aftercooler would be more efficient anyway.




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Jim B

02-19-2005 15:34:39




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 Re: Change from Intercooled to Aftercooled in reply to John Saeli, 02-18-2005 15:44:13  
John, Interesting question ... but I'd think you would be alot off better simple replacing your intercooler (Intake Manifold) with a good used one. Considering all the many other issues that may arise due to the change to aftercooling. Case did alot of engineering to balance the total power train to the intercooled sytem even down to the powershift tranny, axles and final drive units.
Having said that ... I'll now contradict myself ... with the fact that I've toyed with the idea of adding an aftercooler to my 2470, which as we know has no induction air cooler of either kind. My plan is to place a used Ford 7.3L Diesel Pickup Truck aftercooler under the 2470 hood along the right hand side of the engine, mount vertically with the long side being front-to-rear. The induction plumbing is quite feasible, I've mocked-fit it into the space available. My plan includes using a pair of aftermarket 'Hot-Rod' electric radiator fans mount on the side of the hood to blow through the aftercooler. This, of course, will require a larger alternator and the space also exist for that. This mounting location would not pump the resulting hot air through the front mounted engine rad, trans oil cooler or A//C condenser ... therefore these sytems should not be affected.
What do you guys think of that concept ?

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Can't even use my name

02-20-2005 06:56:56




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 Re: Change from Intercooled to Aftercooled in reply to Jim B, 02-19-2005 15:34:39  
Better idea yet is to inter-cool AND after-cool!



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John Saeli

02-20-2005 10:30:42




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 Re: Change from Intercooled to Aftercooled in reply to Can't even use my name, 02-20-2005 06:56:56  
I've had too many problems with the Int. cooler over the years. I want it gone. Cost new is $975.



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JohnSaeli

02-19-2005 17:01:16




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 Re: Change from Intercooled to Aftercooled in reply to Jim B, 02-19-2005 15:34:39  
Hey Jim: I'm not worried about any boost in power. We're not cowboys here. I would like to know just how much heat will come out of the cooler. I had planned on mounting the cooler just behind the Grill. What is the air temp of the Turbo'd air??



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Jim B

02-19-2005 18:20:27




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 Re: Change from Intercooled to Aftercooled in reply to JohnSaeli, 02-19-2005 17:01:16  
Yo John,
I can't quote you the temps in question but I can attest the fact that an aftercooling will provide more temp reduction of the compressed air coming out of the turbo than an intercooler will. This is simply due to the the physics of the air-to-air aftercooler using the ambient air temp which is usually between 50-90F. Whereas the water-to-air intercooler is cooling the same temp turbo'ed air using 200+F engine coolant. When the compressed air is cooled to a lower temp and the PSI stays the same there will be a higher density of oxygen available for combustion .... therefore more HP, all other things being equal.

This is taken into consideration for the big Diesels in most Highway Semis which use an aftercooler. Plus, it doesn't place as much additional cooling load on the Engine cooling system. On the plus side for intercoolers, they are more durable against vibration fatigue and damage from penetration (branches & such) and are cheaper.

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John Saeli

02-19-2005 19:44:34




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 Re: Change from Intercooled to Aftercooled in reply to Jim B, 02-19-2005 18:20:27  
Hey Jim: Did you read my earlier quote that CASE wants $975. for a new cooler? It's been a pain over the years anyways. It's cooled coolant going into the cooler, much cooler than 200.deg.



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Jim B

02-20-2005 08:22:21




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 Re: Change from Intercooled to Aftercooled in reply to John Saeli, 02-19-2005 19:44:34  
Yo John,
Did you read my original reply ... I suggested you repair with a USED intercooler, not the $1000 new guy from Case. Thad posted that he had a couple of 2670's for salvage which were all intercooled 504's.
Your right, I stand corrected, the intercooler does use cooled coolant which is more like 140-160F, still hotter than ambiant air temps. Aftercoolers make the induction air cooler than intercoolers and will produce more HP, again all other things being equal. This is common knowledge in the Hot Rod automobile circles. I suspect another factor for that efficiency is the large surface area space available to package an aftercooler, usually the size of the engine radiator .... whereas the intercooler size is limited to the space inside the intake manifold.

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John Saeli

02-20-2005 10:33:27




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 Re: Change from Intercooled to Aftercooled in reply to Jim B, 02-20-2005 08:22:21  
Hey Jim: Yes, I read your earlier Post. The intercooler has been a pain. For that reason, & the reasons you just stated, I want to convert it. I also have bill koob's blessing.



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Tom (Ks)

02-18-2005 19:21:05




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 Re: Change from Intercooled to Aftercooled in reply to John Saeli, 02-18-2005 15:44:13  
The machines I work on have the aftercooler beside the radiator. If the cooler is mounted out in front of everything, then your AC condensor is going to heat up. After the cooler was added up with the radiator, a larger fan is needed to pull extra air through everything. They also cost enough money that I can spend two to three hours at $60/hr to repair (straighten out fins on combines).



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Thad

02-18-2005 18:41:57




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 Re: Change from Intercooled to Aftercooled in reply to John Saeli, 02-18-2005 15:44:13  
I have a 2470 fo salvage that they mounted one on top of the hood. Looks bad but must have worked. I have several off of 2670s that are good if you needed one. Thad



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John Saeli

02-19-2005 05:54:52




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 Re: Change from Intercooled to Aftercooled in reply to Thad, 02-18-2005 18:41:57  
Hey Thad: Are they Intercoolers or Aftercoolers you have. I'd really like to convert this 4690 to an aftercooler, but I still have unanswered questions. Such as, will the turbo push enough air? Thanks



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case trader

02-18-2005 16:50:34




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 Re: Change from Intercooled to Aftercooled in reply to John Saeli, 02-18-2005 15:44:13  
hey john are you talking about in front of radiater like air to air after cooled , be a lot of plumbing to get correct air flow don't think you would have the right turbo to push enough volume i guess if you had a pyrometer to watch ex. temp. sounds like a lot of work but they told orvile he couldn't fly.



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John Saeli

02-18-2005 17:23:04




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 Re: Change from Intercooled to Aftercooled in reply to case trader, 02-18-2005 16:50:34  
Hey Trader: Yes, Aftercooled, plumbed around in front of the Rad. Never thought about the Turbo not being able to push it around. HHhhMMmmm.



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