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  #16  
Old 09-16-2009, 10:04 PM
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Re: SVX Engine cooling "Again & Again"

yes that will be part of the system. We will be running a small electric pump for the heater core alone

Tomq
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  #17  
Old 09-16-2009, 10:23 PM
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Re: SVX Engine cooling "Again & Again"

That pretty smart were did you find it.
Also I have this crazy idea which is a bit complicated but involves puting a second radiator infront of the first. You send the hot water from the top of the engine into the radiator closest to the engine out the bottom and into the front one then back to the inlet of the water pump. Its means you can reduce the temp of the coolent down lower with on the return then you can the same amount of water. Works on the princpal that coolest air hits cooler coolent and hotter air hits hottest coolent.
Its know in industry as counter current cooling. In our factory we send water into a sweet corn cooler at 5 c and product at 100c at the other end we get out water at 100c and corn at about 10c. This is done with equal volumes of both.
If we don't run AC condensor the other radiator can go there.
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.
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  #18  
Old 09-16-2009, 10:33 PM
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Re: SVX Engine cooling "Again & Again"

I am going to have to say no to the twin radiator idea. Its not realistic to add it to the system. It is not the problem at hand. Lets address the current issues we know, then worry about if the radiator is sufficient which technically speaking should be good for twice the power levels anyone using them is reaching

Tom
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  #19  
Old 09-16-2009, 10:41 PM
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Re: SVX Engine cooling "Again & Again"

The difficulity is the current radiator is okay at "What coolent flow rate". My suggestion only applies if we can't get the flow rate up that's going through the engine. X water will carry Y BTU of heat minius the inlet temp.
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.
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  #20  
Old 09-16-2009, 10:46 PM
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Re: SVX Engine cooling "Again & Again"

I have to ask, there is not that great of a difference in the cooling of this engine with many others of similar hp/liter designs. Why would we need excessive cooling while others do not. We just need proper cooling. Address the internal flaws and I can almost guarantee that it will operate very well

Tom
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  #21  
Old 09-16-2009, 10:53 PM
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Re: SVX Engine cooling "Again & Again"

You may be right Tom I have not compared the amount of flow to other engines. Just the other 6clyinder Subaru which has a heap more coolent flow per min. What engine have you looked at the flow of.
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.

Last edited by Dessertrunner; 09-16-2009 at 10:56 PM.
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  #22  
Old 09-16-2009, 10:57 PM
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Re: SVX Engine cooling "Again & Again"

haven't payed much mind to the flow. I will be chosing a 55gpm pump for Dan's engine. With the supporting X-over modification I see no reason it should not be able to use most of the pump's capacity. lets see what we get before we make any more decisions

Tom
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  #23  
Old 09-16-2009, 11:04 PM
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Re: SVX Engine cooling "Again & Again"

Is the new water pump with the existing pump in or out?
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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.
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  #24  
Old 09-16-2009, 11:06 PM
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Re: SVX Engine cooling "Again & Again"

the pump housing will be there to direct flow into the block but it will have no impeller and a single idler will take the place of the drive pulley

Tom
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  #25  
Old 09-17-2009, 02:47 AM
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Re: SVX Engine cooling "Again & Again"

YT, it might be a dumb question from my part, you mentioned about tapping the heads to eliminate the boiling water issue in the block. Why not tapping the water passage directly in the block instead where that boiling water is?

The only answer I could find is water flow? Not to disrupt the water flow?
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  #26  
Old 09-17-2009, 04:12 AM
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Re: SVX Engine cooling "Again & Again"

Two comments:

1. I have been runing Water Wetter for years and it may help, but doesn't cure the problem. I have also been running 80% water, 20% anti-freeze to increase the specific heat of the coolant, and that hasn't cured the problem.

2. Jack Laverty has been running an electric fuel pump for some time and still has overheating problems, so this likely rules out impellor cavitation at high rpm's as the only cause of internal boiling.
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  #27  
Old 09-17-2009, 04:38 AM
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Re: SVX Engine cooling "Again & Again"

Quote:
Originally Posted by SilverSpear View Post
YT, it might be a dumb question from my part, you mentioned about tapping the heads to eliminate the boiling water issue in the block. Why not tapping the water passage directly in the block instead where that boiling water is?

The only answer I could find is water flow? Not to disrupt the water flow?
Because if I pump it directly into the block, it will not make much of a difference because that is where the coolant is being sent in the first place. Sending it to the head allows coolant that has been cooled by the rad to be sent into the hot stream to help it be more efficient in its job of thermal absorbtion before it hits the hot spot.

Like I said though, I doubt it will this considering how small the X-over manifold really is inside. I truly believe it is simply too small to move enough water to be efficient for the LH side of the motor

Tom
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  #28  
Old 09-17-2009, 05:16 AM
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Re: SVX Engine cooling "Again & Again"

Quote:
Originally Posted by TomsSVX View Post
Because if I pump it directly into the block, it will not make much of a difference because that is where the coolant is being sent in the first place. Sending it to the head allows coolant that has been cooled by the rad to be sent into the hot stream to help it be more efficient in its job of thermal absorbtion before it hits the hot spot.

Like I said though, I doubt it will this considering how small the X-over manifold really is inside. I truly believe it is simply too small to move enough water to be efficient for the LH side of the motor

Tom
Hope this X-over method works as you expect Tom, but just in case it doesn't... will it make sense to tap the left block (not head), connect it to an electric pump which works automatically at a certain temperature then to a small outside rad (bike rad?) then again to the right block?

This way you will be transferring the boiling water to the rad for cooling then inject it again to the right side.. am I making sense?
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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.
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  #29  
Old 09-17-2009, 05:40 AM
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Re: SVX Engine cooling "Again & Again"

Dan I agree with Tom the first approach needs to be the simplest first. We need to exhaust all possiabilies before we go for things like taping in the back of the head or a second radiator such as I suggested. The big drama about tapping into flows a different positons is it might just move the problem to another spot.
I think we all agree that the problem is coming from the left back from lack of water.
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.
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  #30  
Old 09-17-2009, 06:03 AM
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Re: SVX Engine cooling "Again & Again"

Definitely Tony, I am with you guys concerning the idea of X-over mod. But this is plan A.

I was suggesting we should also set plans B & C just in case the overheating issue is not fully eliminated with plan A.
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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.
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