 Coolant hose sizing, 914s are air-cooled? But SHO-914s are H2O! |
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| 3d914 |
  Oct 30 2011, 08:04 PM
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#1
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Senior Member  Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region  |
I'm gathering data for my 914-SHO conversion about getting the coolant from the front to the mid-engine position. The fitting sizes on the engine appear to 1-1/4" for inlet and 1-1/2" for outlet.
I don't have the fitting sizes on the radiator - you think they'd match, but that's not a given. Still doing more research there. I'd like to get the supply hose down to 1" and the return to 1-1/4" to make routing along the body easier. Any thoughts, experiences from the V8/V6 folks? TIA, |
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| Phoenix-MN |
Oct 30 2011, 08:32 PM
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Senior Member Group: Members Posts: 927 Joined: 23-January 04 From: ST. Bonifacius,MN Member No.: 1,590 |
Buick 3.8 V6 (about 275 hp), 1 1/4" and 1 1/2". I used stainless tubing under the car. No cooling problems.
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| Mike Bellis |
Oct 30 2011, 09:18 PM
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#3
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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On my V8 I used Drake 1" hose. Temps always around 165. On my rotary I switched to 1-1/8" hose because the engine runs hotter by design. Temps constant 180.
Either way will work for you. The Renegade Hybrid adapters are very restrictive they go from 1.5" to 7/8", but they seem to work fine. I eliminated all adapters for my rotary. I built just one 1-3/4" to 1-1/8" for the lower rad outlet. |
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| Emmerich |
Oct 30 2011, 10:37 PM
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#4
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Newbie Group: Members Posts: 2 Joined: 16-December 10 From: Dallas Member No.: 12,491 Region Association: None |
On my Chevy I used to have 1.0 to the radiator and 1.25 back to the water pump, now I have 1.25 all around. I still have overheating issues, working on speeding up the water pump. Jegs, Summit, and others have a lot of connectors and hoses for changing diameters, check those out when you need them.
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| strawman |
Oct 31 2011, 12:52 PM
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#5
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Senior Member Group: Members Posts: 881 Joined: 25-January 08 From: Los Osos, CA Member No.: 8,624 Region Association: Central California
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I used 1" ID hose from engine to radiator, and 1.25" from radiator to engine, for my turbocharged Subaru setup. I used silicone reducer hoses to mate up with the Subaru and Griffin inlets/outlets as needed. You can buy 'em at frozenboost.com, as well as aluminum hose connectors and continuous smooth-bore hose clamps so you don't damage the silicone hoses.
Of course, my car is not yet running (!!!), so YMMV. |
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| BajaXJ92 |
Nov 1 2011, 05:36 AM
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#6
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Extended Member Group: Members Posts: 2,146 Joined: 20-April 06 From: Prescott, AZ Member No.: 5,895 Region Association: MidAtlantic Region |
QUOTE(kg6dxn @ Oct 30 2011, 11:18 PM)  On my V8 I used Drake 1" hose. Temps always around 165. On my rotary I switched to 1-1/8" hose because the engine runs hotter by design. Temps constant 180. I was curious whether 1" hose will work for a V8 setup. I believe I've got 1 1/4", maybe 1.5" now, I'll have to measure. Do you think a 1" hardline will fit down the longs? I'm planning on giving this a try early next year, as I'm largely funny about soft hoses being run straight down the middle of the pans. (IMG:style_emoticons/default/blink.gif) The only thing I really want to avoid are 90* bends. I've got a dedenbear electric water pump and I'd hate to bog it down with restrictive flow... |
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