intercoolers for turbos
Submitted: Monday, Jul 07, 2008 at 20:05
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Cape York Connections
I have been thinking of fitting a intercooler to the tubo are they worth it and what do thet do for you.
The 4x4 is a 60 sereis and already has the tubo fitted from new
all the best
Eric
Reply By: Member - Matthew C - Monday, Jul 07, 2008 at 20:41
Monday, Jul 07, 2008 at 20:41
If youre looking for extra power when towing or hard sand type work then yes it is worth it.
MAtt
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Reply By: Geoff (Newcastle, NSW) - Monday, Jul 07, 2008 at 23:24
Monday, Jul 07, 2008 at 23:24
They cool the indution air after it leaves the turbo and before it enters the engine. (Some would suggest they should be called after-coolers but they do cool the inter stage air)
What does that do? Cooler air is more dense and therfore contains more oxygen. More oxygen means the ability to add more fuel.
Adding more fuel means the potential to produce more power.
Often intercooled turbocharged engines run cooler than their non-intercooled counterparts.
Hope this helps,
Geoff
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Follow Up By: Member - Matt (Perth-WA) - Tuesday, Jul 08, 2008 at 10:52
Tuesday, Jul 08, 2008 at 10:52
You are right Geoff,
Most of the OEM truck manufacturers do refer to the Intercooler as an aftercooler or charge-air-cooler! (charge as in boost).
I guess we just followed the small car(ricer) industry with the term intercooler!
Matt.
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Reply By: Member - Oldplodder (QLD) - Tuesday, Jul 08, 2008 at 08:16
Tuesday, Jul 08, 2008 at 08:16
Best way I can describe the difference is to look at the my 2.8l turbo diesel. 76kw in the triton, turbo and no intercooler, 92kw in my pajero with turbo and intercooler, and an extra 3 degrees on the fuel pump timing.
Basically colder air is denser and gives more oxygen, which is more power, (with more fuel).
Exploroz has a good technical article on intercoolers.
Can't seem to open it at the moment to give you link.
Look under topics/technical.
So will it pay for itself? Only you can answer that one :o)
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Follow Up By: Member - Oldplodder (QLD) - Tuesday, Jul 08, 2008 at 08:17
Tuesday, Jul 08, 2008 at 08:17
Can't remember the torque figures. Something like 240nm in the triton and 290nm in the pajero.
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Follow Up By: Cape York Connections - Tuesday, Jul 08, 2008 at 09:47
Tuesday, Jul 08, 2008 at 09:47
Does that mean more fuel.
I noticed the other night driving it was quite cool the air was moist the 4x4 ran a lot better and used a lot less fuel.
Is that the same as a intercooler.
all the best
Eric
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Follow Up By: Member - Matt (Perth-WA) - Tuesday, Jul 08, 2008 at 10:57
Tuesday, Jul 08, 2008 at 10:57
Spot on Eric, although the actual results can differ due to the underbonnet temps and the ambient temp on the day!
But apart from ensuring a more complete burn...for the same amount of accelerator use it (simplistically) should be more power for same fuel use.
In reality this increase the volumetric efficiency (so the vehicle can 'go' a little harder), people tend to push them harder and the result is more fuel use. But that is not due to the intercooler its due to the increased throttle use and enjoyment of slightly more power available.
Matt.
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Follow Up By: Member - Oldplodder (QLD) - Tuesday, Jul 08, 2008 at 11:30
Tuesday, Jul 08, 2008 at 11:30
As Matt said, spot on.
Doesn't use more fuel unless you put your foot into it. Son regularly gets 15l/100k, while I get about 11 to 12l/100k. He uses full throttle more.
May actually use slightly less fuel with careful use of the throttle, due to more complete combustion.
But if you need more power for overtaking, it is there. So how often do you wish you had more power? Those are the times you would use it. At a steady 100k wouldn't make much difference, still takes the same amount of power to push the car along.
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