I didnt use 3/8 tubing used 3/8 stainless braded hose. Hose is sized by ID 3/8 hose has 3/8 inside dia. Tubing goes by OD 3/8 tubing has a 5/16 inside dia. One reason I used hose was also that tubing needed some sharp bends to navigate it around the frame and engine. Sharp bends kink easy and flow porly. Even the factory stuff loks bad in places. The hose allowed smoother and fewer bends to accomplish the same thing increasing flow.
Going to bigger size tubing or hose is a bit tricky with the AOD. Lentec just told me to screw in a pipe fitting. That scared me a bit. AODs use a straight thread fitting not tappered pipe. Concerns were leakage and metal shavings getting in the system.
Looking at the quick disconect fittings noted the hole in the threaded end was 3/8 or a bit bigger even though the tubing was 5/16. Pulled out the plastic clip in the end of the fitting and measured the ID of that end of the fitting. Figured if it was carefully drilled to the hole size for a 1/4 inch pipe tap. Screwed up at least one fitting doing it. Then aan adaptor for a larger tubing could be used. I would recomend using nickle/copper brake line as its easyier to bend sharper without kinking and real easy to form double flares on.
Going to bigger size tubing or hose is a bit tricky with the AOD. Lentec just told me to screw in a pipe fitting. That scared me a bit. AODs use a straight thread fitting not tappered pipe. Concerns were leakage and metal shavings getting in the system.
Looking at the quick disconect fittings noted the hole in the threaded end was 3/8 or a bit bigger even though the tubing was 5/16. Pulled out the plastic clip in the end of the fitting and measured the ID of that end of the fitting. Figured if it was carefully drilled to the hole size for a 1/4 inch pipe tap. Screwed up at least one fitting doing it. Then aan adaptor for a larger tubing could be used. I would recomend using nickle/copper brake line as its easyier to bend sharper without kinking and real easy to form double flares on.
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