Hot intake plenum and valve covers. why?
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
Hot intake plenum and valve covers. why?
I noticed that after the car has stopped after a sprinted run, the engine needs so much hours to cool down (I'm not speaking of oil and coolant temp..).I'm speaking of my superram plenum and valve covers.
After a sprinted run I can't put my hands on the plenum ..too hot.
After 1/2 hours the plenum and the valve covers are still hot but i can put briefly my hands on it.
I always tought that this is normal.
Some days ago I needed to perform a check on the spark plugs.
The car was stopped 1 hours before.
Well, the exhaust (even the part closer to the heads) where not cool, but only warm (I can maintain the hands on it without be burned at all )
if i put my hand on the plenum I have to remove them after some seconds...
Is it normal?
If I let it overnight (say I stopped the engine at night at 1:00 AM ) and I check the temp the morning at 7:00 AM the plenum is almost cool but I can feel it is not completely cooled as others engine parts are .
After a sprinted run I can't put my hands on the plenum ..too hot.
After 1/2 hours the plenum and the valve covers are still hot but i can put briefly my hands on it.
I always tought that this is normal.
Some days ago I needed to perform a check on the spark plugs.
The car was stopped 1 hours before.
Well, the exhaust (even the part closer to the heads) where not cool, but only warm (I can maintain the hands on it without be burned at all )
if i put my hand on the plenum I have to remove them after some seconds...
Is it normal?
If I let it overnight (say I stopped the engine at night at 1:00 AM ) and I check the temp the morning at 7:00 AM the plenum is almost cool but I can feel it is not completely cooled as others engine parts are .
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
What I described is with the hood open!
open or closed the LAST thing that cool down is the intake plenum.
I monitored the IAT temps with various scans and it is only some degrees over the ambient temp, but the surface of the plenum is HOT really Hot!
-Beppe-
open or closed the LAST thing that cool down is the intake plenum.
I monitored the IAT temps with various scans and it is only some degrees over the ambient temp, but the surface of the plenum is HOT really Hot!
-Beppe-
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
What oil and coolant temperatures display during operating conditions?
Are upper end oil flow restrictors being used in the oil galleys? What
about the push rods, do they limit oil flow? Is there anything about
the valve spring rates or configuration that might cause them to run
hot? Rocker arms?
While I agree with the earlier statements, I know that your engine is
modified.
.
Are upper end oil flow restrictors being used in the oil galleys? What
about the push rods, do they limit oil flow? Is there anything about
the valve spring rates or configuration that might cause them to run
hot? Rocker arms?
While I agree with the earlier statements, I know that your engine is
modified.
.
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
What oil and coolant temperatures display during operating conditions?
Are upper end oil flow restrictors being used in the oil galleys? What
about the push rods, do they limit oil flow? Is there anything about
the valve spring rates or configuration that might cause them to run
hot? Rocker arms?
While I agree with the earlier statements, I know that your engine is
modified.
.
Are upper end oil flow restrictors being used in the oil galleys? What
about the push rods, do they limit oil flow? Is there anything about
the valve spring rates or configuration that might cause them to run
hot? Rocker arms?
While I agree with the earlier statements, I know that your engine is
modified.
.
Oil sometimes in the 230-235 range. Normally in 210-220
I never performed prolonged WOT (i have only 550 miles on my new 396)
Oil restrictors? I dont know... I have to ask to Pete K (he made my engine).
Springs are 135 lb open and 365 closed @ 2.030 installed height.
Rockers are the promagnum Comp cams 1.6..
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That's why guys will ice down the intake between runs at the track of course.
Race Director
Joined: Feb 2003
Posts: 11,672
Likes: 20
From: Lake Wylie SC
Here is a suggestion for you, install an electric coolant pump and wire your fans so that you can manually turn them on. When you stop your engine after a hard hot run, just turn on the fans and coolant pump. It's amazing how fast it cools the whole engine down. Just don't run your battery down too far.