Feeler: Phenolic intake spacers
#122
Rainman
Rennlist Member
Rennlist Member
Thread Starter
I don't know if I'll ever get around to this test but if you think you might, I'll make you a deal...
#124
Burning Brakes
My popcorn has gone stale more than once waiting for people to post real data. The problem with all of the data I've seen in articles like the one you cited is that it measures the temp of the intake manifold material itself, and not the air within the manifold. I'm unconvinced these have any merit until someone posts real data showing reduced intake AIR temps.
He did see some small performance gains (I wouldn't expect more than he saw) in the test I referenced, it just doesn't explain why, which I really want to know.
#125
Rennlist Member
Michael & Spencer..let me know what you think.My intake is still off the engine and this would be a good time to add one...might be in the mix for next month or two..want to get the engine installed first. I am interested, Spencer..any reports from other buyers?
#127
Rennlist Member
Pretty cold here the last couple of days -1 this AM..Brr. even with the electric blanket..Noah must be even more cold than that..Supposed to break tomorrow with a heat wave of about 40....LOL!
#129
RL Community Team
Rennlist Member
Rennlist Member
The reason I'm interested in this is that my IAT can go up to 60 Celsius during idle.
I have a stock intake tract, too, so it sucks the air from in front of the wheel well. Temperature is measured at the (removed) AFM's position.
I do find this strange... would be glad to be able to mitigate it.
I have a stock intake tract, too, so it sucks the air from in front of the wheel well. Temperature is measured at the (removed) AFM's position.
I do find this strange... would be glad to be able to mitigate it.
#130
Rainman
Rennlist Member
Rennlist Member
Thread Starter
That's very unusual, I logged my iat when I was running a cone filter intake and on a 40C day the iat never passed 45C even while idling for a long time.
The reason I'm interested in this is that my IAT can go up to 60 Celsius during idle.
I have a stock intake tract, too, so it sucks the air from in front of the wheel well. Temperature is measured at the (removed) AFM's position.
I do find this strange... would be glad to be able to mitigate it.
I have a stock intake tract, too, so it sucks the air from in front of the wheel well. Temperature is measured at the (removed) AFM's position.
I do find this strange... would be glad to be able to mitigate it.
#131
Race Car
Join Date: Mar 2012
Location: Austin TX, drinking beer in the garage
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Need an intake spacer to clear my hx35 since I had to space the turbo away from the mount ~11.5 mm. would be interested in a kit without intake manifold gaskets and ideally in 5/16" thickness. btw does a strut brace clear the hood with this spacer mounted?
#132
Rennlist Member
Sounds like the only way to get the temps down in the intake tract would be to have the entire manifold duplicated in a phenolic material...that would be insulative as well as quite smooth on the runners. That might be another reason that a lot of newer engines are running plastic manifold on the intake side. But most probably for weight reduction, and less expensive to produce en mass. A thick fiber or phenolic base gasket on carbureted engines especially with a 4 barrel carb, must be run, otherwise the engine heat will percolate the fuel in the float chamber. I still think that Spencer's idea is a good one..Did you ever get it sorted out for the early cars with the fuel rail issue, Spencer?
#134
Pro
After adding an intercooler between my turbo and the same intake, the intake is easily 100+ degrees cooler.. The harder I run it the colder it gets.. It is unnaturally cold compared to everything else in my engine bay..
It will heat soak if left idling, but take it for a good run - cold.. cold cold..
Before you could fry an egg on it, now you can put your cheek on it..
So now..
If dirastically decreasing intake air temps can dirastically decrease the intake manifold temps, it must work vise versa..
It's not a heat 1 way street, it's a heat exchange..
If air can cool the intake, then why couldn't the intake heat the air?
Well, if the air is cooling the intake, then the intake MUST be heating the air, huge amounts of cold air stripping the heat out of the intake manifold..
A difference in intake manifold temp may not heat the air enough to matter at performance level operation because their is so much more air in play than their is intake manifold, but it has to some or their is no way my air could cool my manifold if not..
One is the fact that the intake charge is cooling the manifold as it enters. Since the manifold is not as hot to begin with, because it does not have the cylinder head transferring heat to it, the amount of heat removed by the intake charge is low. Also, any venturi effect in the intake system will lower the charge temp well below ambient. This happens usually at the throttle plate, which, guess what, leads right into the manifold.
So much flowing air can actually strip more heat than ambient temp?
#135
Former Vendor