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#46
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Re: SVX Engine cooling "Again & Again"
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This not in fact a matter of one flow overcoming another flow, it is a matter of two unequal pressures, presented with a single outlet.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#47
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Re: SVX Engine cooling "Again & Again"
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Trevor, can you show us a diagram about this V8 you are talking about? Or is it general to all Ford V8's?
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Danny 1994 Silver SVX in hybernation, awaiting for the monsterous awakening (Lebanon) 1967 Mercedes-Benz 250SL Euro Specs, Hard/Softtop, White/Red. Under Complete Restoration 2013 Mercedes-Benz SL350 Euro Specs, White/Red. Mint... Another step into SL Collection. |
#48
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Re: SVX Engine cooling "Again & Again"
For the recod the big book says 100lpm @ 3,000rpm and 200lpm @ 6,000rpm.
I have cut my manifold as you can see from the image the next plan if that doesn't fix the problem will be to put a new pipe inthe centre were the ruler is. That pipe will be 40mm as opposed to 30mm it is now. Next change the water pump inlet pipe from 30mm to 45mm if possiable. Also both inlet and outlet on the radiator changed to suit I feel sure the inlet and out lets of the motor are both 30mm will cause a problem. Centrifugal pumps always have a larger inlet then outlet to prevent caviation. Great the way everyone is jumping on board I think if a few of us run tests we will beat this problem finally. Have a great day or night. Tony
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1995 - SVX 700,000 K Mine, DMS Struts to lift car 2in. Tyres Wrangler Silent Armor 235/70R16, PBR Radiator. 6 speed with DCCD and R180 rer diff, Heavy duty top strut mounts front and rear. Speedo correction box fitted. New stero (gave up on the old one). Back seat removed and 2 spare tyres fitted for desert driving. ECUTune SC sitting in the box for the next SVX. 1992 - SVX 255 K Wife (Want to stay Married so not allowed to fit SC) 1992 - SVX Pearl with black roof race car roll cauge etc ready to race. Ex Tasman Targa car. 1995 - SVX Green low k mint condiation. 1995 - SVX Rally car, ex Matts car. Now to be used on track. 1992 - SVX red & Black being converted to Mid Engine. 1995 - SVX Red 143,000 bit rough. Owned 5 others Subaru back to a 1974 1400 GSR. |
#49
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Re: SVX Engine cooling "Again & Again"
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Coolant circulating too quickly, was the accepted diagnosis, in respect of the old flat head V8 Ford. This I know because in the early 1950s, I did very well in club competitions, using one of these engines in an AC sports car of 1935 vintage. Incidentally, a fan was not used and the car also served as family transport. Quote:
The Ford dual pumps were far too efficient and the cure was to reduce this quite radically. Drill all the rotor blades, or knock off every other one. Cast iron made them easy to break. Water at high pressure and full of air, is not an efficient coolant. Recesses are passed over, pockets are formed and hot spots result. Cheers, Trevor.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! Last edited by Trevor; 09-18-2009 at 04:47 AM. |
#50
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Re: SVX Engine cooling "Again & Again"
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P.S. The fact that a flow has been stated for 6,000 RPM, is surely a sign that cavitation within the pump is unlikely. Keep at it.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! Last edited by Trevor; 09-18-2009 at 05:12 AM. Reason: P.S. |
#51
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Re: SVX Engine cooling "Again & Again"
This would have been great if otherwise...
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Danny 1994 Silver SVX in hybernation, awaiting for the monsterous awakening (Lebanon) 1967 Mercedes-Benz 250SL Euro Specs, Hard/Softtop, White/Red. Under Complete Restoration 2013 Mercedes-Benz SL350 Euro Specs, White/Red. Mint... Another step into SL Collection. |
#52
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Re: SVX Engine cooling "Again & Again"
Why not run a bypass in the cross over pipe so that the left hand stream enters the flow of the right post headers...
or not even mix them at all until they hit the rad with a Y like junction? Radiator Tomyx? -Sov |
#53
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Re: SVX Engine cooling "Again & Again"
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The position of the radiator inlet favors the right side bank in terms of length and position. The left side would be toooo long besides finding a way to make it reach there and clearance issues. It would be ideal though if possible.
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Danny 1994 Silver SVX in hybernation, awaiting for the monsterous awakening (Lebanon) 1967 Mercedes-Benz 250SL Euro Specs, Hard/Softtop, White/Red. Under Complete Restoration 2013 Mercedes-Benz SL350 Euro Specs, White/Red. Mint... Another step into SL Collection. |
#54
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Re: SVX Engine cooling "Again & Again"
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By the way if you look at the manifold on the car water goes from the left bank throught the throttle bodie and in to the manifold on the right bank. The only way this can happen is if there is a pressure difference from one side to the other, eg a major restriction in the centre. Tony
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1995 - SVX 700,000 K Mine, DMS Struts to lift car 2in. Tyres Wrangler Silent Armor 235/70R16, PBR Radiator. 6 speed with DCCD and R180 rer diff, Heavy duty top strut mounts front and rear. Speedo correction box fitted. New stero (gave up on the old one). Back seat removed and 2 spare tyres fitted for desert driving. ECUTune SC sitting in the box for the next SVX. 1992 - SVX 255 K Wife (Want to stay Married so not allowed to fit SC) 1992 - SVX Pearl with black roof race car roll cauge etc ready to race. Ex Tasman Targa car. 1995 - SVX Green low k mint condiation. 1995 - SVX Rally car, ex Matts car. Now to be used on track. 1992 - SVX red & Black being converted to Mid Engine. 1995 - SVX Red 143,000 bit rough. Owned 5 others Subaru back to a 1974 1400 GSR. |
#55
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Re: SVX Engine cooling "Again & Again"
Did a quick calc and if the pipes go from 30mm to 42ID the flow will double.
Tony
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1995 - SVX 700,000 K Mine, DMS Struts to lift car 2in. Tyres Wrangler Silent Armor 235/70R16, PBR Radiator. 6 speed with DCCD and R180 rer diff, Heavy duty top strut mounts front and rear. Speedo correction box fitted. New stero (gave up on the old one). Back seat removed and 2 spare tyres fitted for desert driving. ECUTune SC sitting in the box for the next SVX. 1992 - SVX 255 K Wife (Want to stay Married so not allowed to fit SC) 1992 - SVX Pearl with black roof race car roll cauge etc ready to race. Ex Tasman Targa car. 1995 - SVX Green low k mint condiation. 1995 - SVX Rally car, ex Matts car. Now to be used on track. 1992 - SVX red & Black being converted to Mid Engine. 1995 - SVX Red 143,000 bit rough. Owned 5 others Subaru back to a 1974 1400 GSR. |
#56
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Re: SVX Engine cooling "Again & Again"
Tony,
Have you confirmed that your modified pipe will still fit under the intake? If "yes", could you provide some dimensions on the pieces of Al you welded on? Thanks. -Bill
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Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker |
#57
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Re: SVX Engine cooling "Again & Again"
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Quote:
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#58
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Re: SVX Engine cooling "Again & Again"
The flow will not be increased by enlarging one section of the circuit. The most restrictive point in the circuit, will continue to throttle the overall flow.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#59
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Re: SVX Engine cooling "Again & Again"
Trevor,
Would you accept that as flow goes up pressure has to increase as the restriction beomes a bigger issue. That said then all things are not equal and flow must be reduce in proportion to revs. Tony
__________________
1995 - SVX 700,000 K Mine, DMS Struts to lift car 2in. Tyres Wrangler Silent Armor 235/70R16, PBR Radiator. 6 speed with DCCD and R180 rer diff, Heavy duty top strut mounts front and rear. Speedo correction box fitted. New stero (gave up on the old one). Back seat removed and 2 spare tyres fitted for desert driving. ECUTune SC sitting in the box for the next SVX. 1992 - SVX 255 K Wife (Want to stay Married so not allowed to fit SC) 1992 - SVX Pearl with black roof race car roll cauge etc ready to race. Ex Tasman Targa car. 1995 - SVX Green low k mint condiation. 1995 - SVX Rally car, ex Matts car. Now to be used on track. 1992 - SVX red & Black being converted to Mid Engine. 1995 - SVX Red 143,000 bit rough. Owned 5 others Subaru back to a 1974 1400 GSR. |
#60
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Re: SVX Engine cooling "Again & Again"
Here is a pump curve to explain
__________________
1995 - SVX 700,000 K Mine, DMS Struts to lift car 2in. Tyres Wrangler Silent Armor 235/70R16, PBR Radiator. 6 speed with DCCD and R180 rer diff, Heavy duty top strut mounts front and rear. Speedo correction box fitted. New stero (gave up on the old one). Back seat removed and 2 spare tyres fitted for desert driving. ECUTune SC sitting in the box for the next SVX. 1992 - SVX 255 K Wife (Want to stay Married so not allowed to fit SC) 1992 - SVX Pearl with black roof race car roll cauge etc ready to race. Ex Tasman Targa car. 1995 - SVX Green low k mint condiation. 1995 - SVX Rally car, ex Matts car. Now to be used on track. 1992 - SVX red & Black being converted to Mid Engine. 1995 - SVX Red 143,000 bit rough. Owned 5 others Subaru back to a 1974 1400 GSR. |
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