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Old 09-09-2012, 02:11 AM   #11 (permalink)
oil pan 4
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Quote:
Originally Posted by Tommygunner View Post
IDN about what OILPAN said. He is an old mechanical NA man
I am running an intercooled HE351VE now.
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Old 09-09-2012, 05:58 AM   #12 (permalink)
suburbank2500
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Maybe this is one of the reasons my IAT is so low, with a top mounted ATA Cooler it sure will cool down the IM with the air passing over it.
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Old 09-09-2012, 06:48 AM   #13 (permalink)
stefuel
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Before you go to all the trouble, I would put a temp probe at the outlet of the turbo to see what the compressed air temp actually is. Just a thought but as a diesel has no "throttle plate" the gobs of air that passes through the intake manifold is probably moving faster then the heat exchange could take place. I would guess that a ATA would give you much better results.

As far as adding something between the heads and manifold, 10MM is a lot. The mounting bolts won't line up when you go to fasten it down. What ever you decide to put between should be machined off the manifold to retain alignment. Could 10MM be safely removed from the IM flanges???
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Old 09-09-2012, 08:20 AM   #14 (permalink)
chevyinlinesix
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Here you go. I made them myself, in my shop
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Phenolic Intake Manifold spacers-intake-manifold-phenolic-spacers.jpg  
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Old 09-09-2012, 07:16 PM   #15 (permalink)
mug23
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Quote:
Originally Posted by stefuel View Post
Before you go to all the trouble, I would put a temp probe at the outlet of the turbo to see what the compressed air temp actually is. Just a thought but as a diesel has no "throttle plate" the gobs of air that passes through the intake manifold is probably moving faster then the heat exchange could take place. I would guess that a ATA would give you much better results.

As far as adding something between the heads and manifold, 10MM is a lot. The mounting bolts won't line up when you go to fasten it down. What ever you decide to put between should be machined off the manifold to retain alignment. Could 10MM be safely removed from the IM flanges???
It doesn't has to be 10mm. it could be 3mm and still effective and wouldn't affect the alignment you mention. My Subaru spacers are 3mm.
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Old 11-28-2012, 09:46 AM   #16 (permalink)
vstech
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aaand I was reading all this thinking it's recent...

stinking spammers...

anyway, gassers need intake cooling to keep the fuel air charge power.
diesels only benefit from the air temp reduction for turbo mass. I doubt much difference from the spacers... however, a metal heat reflector under the manifold likely would.
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Old 11-28-2012, 05:26 PM   #17 (permalink)
Deezel
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Phenolic plastic makes neat spacers and stuff but that stuff transfers heat real quick and really does not isolate the heat from one source to another. Stuff is to dense.
On a turbo engine there is not a heat transfer problem. When the boost builds up over 10 PSI the air itself is probably hotter than your intake. So you really need a aftercooler to cool the air off to see any improvement.
I've built phenolic spacers and in every case the spacer was just as hot as the aluminum it was mounted to. If anybody has any technical info on the net to show me otherwise I would be glad to see .it.

80 degree day the boosted air temp would be around 200 degrees going into the engine at 10 psi. With air temp that hot the isolater spacer would not show any improvement at all.

But don't stop building one, it's still cool to see one in place.
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Last edited by Deezel; 11-28-2012 at 05:43 PM.
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Old 11-28-2012, 08:06 PM   #18 (permalink)
chevyinlinesix
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One should do something to prevent heat transfer from the inside out too.
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1987 GMC Sierra 1500HD, RC LB, 12 bolt 3.08 posi, built 383 stroker, TH400, 13" towing converter, 26mpg highway, 22 city, daily driver/drag truck. Swapping in a built TT Duramax/Allison. Looking for about 700RWHP
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