07-11-2011, 11:06 AM
Join Date: Aug 2007
Location: Fort Myers, FL
Total Cats: 98
Intake Manifold Gasket
Since we added a RSX to the garage recently I've been messing with it a good bit. A ton of people do a Hondata intake manifold gasket to reduce intake temps. It looks like Hondata offers them for a miata but I've never heard of anyone doing it. http://www.hondata.com/heatshieldgasket.html
I did some primative before and after tests with the RSX and the gasket showed some significant drops in temperature on the manifold itself (no idea how that translates to the air inside, but it has to help). Here's the writeup I did on clubrsx:
I took some before and after temperature readings from the intake manifold to see how the gasket would affect manifold temps. All tests were done mid-day in south FL, similarly hot as hell for all 4 tests (2 before, 2 after) on a type S with only raceheader, no other mods, after 15 minutes of spirited driving.
Temperatures were taken from 3 points that were marked on the manifold and taken with a infra-red temperature gun to prevent any skewing of the experiment. Sample points are seen below:
Point 1: 157, 159
Point 2: 138, 140
Point 3: 137, 137
Point 1: 144, 146
Point 2: 132, 133
Point 3: 131, 131
Temperatures close to the head were down 11-13 degrees. Farther away from the manifold temperatures are less drastic (as expected), 6-7 degrees. The test made me curious what kind of difference would be seen where the manifold mates to the head, I'd expect an even wider margin in the results there.
I think I'm going to do one on the miata as well. It doesn't look like the miata manifold has nearly as much surface area as the K20 so maybe it won't make much difference. If nothing else it will move the throttle body/charge pipes out 1/8" and give a little more room for the radiator hose. Just curious if anyone else has done one before?