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GBallantine |
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#1
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Member ![]() ![]() Group: Members Posts: 74 Joined: 12-October 04 From: Toronto,Ont.Canada Member No.: 2,930 ![]() |
Any race guys ever run a 3 or 4 inch hose mounted off the front air dam or attached near the outside mirror thru the rear fire wall and directed onto the fan? Does it add any cooling effect? Any pics of setups?
GB |
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john rogers |
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#2
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 ![]() |
As Kevin noted the 3 inch ducts are way too small, with 2 of them only providing 14.13 square inches of cross section area for the air to move down. A SINGLE 6 inch duct provides 28.26 square inches of area so there is way less resistance to the flow into the engine. My racing mentor who used to race 914s back in the early 70's showed me picts of the large single 6 inch duct running right through the firewall into the front of the engine. It was the smooth heating duct type of metal tube. The front mounted fan had only FOUR blades so as long as the car was going fast it was cool. Yellow flag laps were very bad and could actually cook the engine, but then again it only had to last a single race weekend! I think the past post showed the ducts on Frank Beck's car and also the old Wayne Baker #22 IMSA car if I remember right?
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gregrobbins |
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#3
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Member: Team NARP ![]() ![]() ![]() Group: Members Posts: 1,515 Joined: 23-March 04 From: Arizona Member No.: 1,844 Region Association: Southwest Region ![]() |
The pictures John referrs to at in my Blog.
http://www.914world.com/bbs2/index.php?aut...blogid=230& As Kevin noted the 3 inch ducts are way too small, with 2 of them only providing 14.13 square inches of cross section area for the air to move down. A SINGLE 6 inch duct provides 28.26 square inches of area so there is way less resistance to the flow into the engine. My racing mentor who used to race 914s back in the early 70's showed me picts of the large single 6 inch duct running right through the firewall into the front of the engine. It was the smooth heating duct type of metal tube. The front mounted fan had only FOUR blades so as long as the car was going fast it was cool. Yellow flag laps were very bad and could actually cook the engine, but then again it only had to last a single race weekend! I think the past post showed the ducts on Frank Beck's car and also the old Wayne Baker #22 IMSA car if I remember right? |
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