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Post by Tony O. on Jul 7, 2012 18:42:55 GMT -5
Hello Everyone,
As far as I know, the VW air cooled engine requires a physical barrier between the cool (top) side and hot (bottom) side of the motor. Yet I see no mention of this or provision for doing so on a GT2 in the build manuals.
Am I missing something or did Bradley not understand this when they engineered the GT2 kit?
Tony O.
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Post by centralvalleygter on Jul 7, 2012 23:26:07 GMT -5
This is a bit of an ongoing debate on the boards. It is definitely best to provide seperation between the fresh air (upper) portion and the radiant heat (lower) portion. One person on this board actually ran test and found that there was a consistent 10 degree F gain in the upper portion of the tins without the seperation. Nonetheless, so many manx's, baja bugs, etc. do not have the seperation and seem to run fine. I currently do not have separation in my GT and have not had heating problems in here in San Joaquin Valley where summer temps are often above 100 degrees F in the summer. That being said, one of the improvements I plan to do on mine (maybe even this summer) is to fabricate a barrier.
Just my 2 cents worth.
Warmest Regards....
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Post by Dan MacMillan on Jul 8, 2012 5:08:51 GMT -5
Manx's and Baja's run fine as there is no body stopping airflow around the engine.
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Post by Tony O. on Jul 11, 2012 20:00:18 GMT -5
So far, nobody has voiced an opinion on whether or not the GT2 engineers left out an air flow separator or if I'm not seeing something in the build plans.
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geddes66
Junior Member
Now I am an instructor at the RTS-M, Camp Roberts CA. Teaching new Army mechanics.
Posts: 87
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Post by geddes66 on Jul 14, 2012 19:49:49 GMT -5
I have taken an electronic thermometer and placed the probe in the engine compartment and the main thermometer in the drivers compartment. I never saw a difference that exceeded 12 degrees. Considering the lightness of the GT, and engine load, sealing is not critical to engine survival.
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Post by mj on Jul 17, 2012 11:13:24 GMT -5
As far as I know, the VW air cooled engine requires a physical barrier between the cool (top) side and hot (bottom) side of the motor. In my most humble opinion, YES, it is a very good idea. I took it further and wrapped the 4-to-1 header. I can run the car very hard and place my hand on the tin and it is still cool.  |
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Post by Dan MacMillan on Jul 17, 2012 16:19:22 GMT -5
. Very nice separationNot to mention wrapping your exhaust helps exhaust flow and cylinder scavenging.
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