SVX Engine cooling "Again & Again"

[svxistentialist]

Well if we're all coming clean I'm a SVX aholic.

I can give them up any time I want to.

Just don't want to, is all.

[subbieatnz]

Originally Posted by Dessertrunner

New Thermo style.

Pic not showing. can you repost it?

[Dessertrunner]

Sorry about here is the image.

[oab_au]

Originally Posted by svxistentialist

Well if we're all coming clean I'm a SVX aholic.

I can give them up any time I want to.

Just don't want to, is all.

Oh Joe, I am so glad that you have admitted it.

I always though that you were a bit bent that way, but didn't know how to broach it. I guess, as you have come out of the closet, we can discuss it openly.

You are not alone, I guess we are all sort of 'recreational users'. Most of us have, the one hit, though I see that you are up to, 'the three hits'. A bit more that just a habit mate, but nowhere near the stage of Earl, he has really lost it, ODing on 16/18 hits

So take support from your fellow uses, You can do it!!!!

Harvey.

[svxistentialist]

Originally Posted by oab_au

Oh Joe, I am so glad that you have admitted it.

I always though that you were a bit bent that way, but didn't know how to broach it. I guess, as you have come out of the closet, we can discuss it openly.

You are not alone, I guess we are all sort of 'recreational users'. Most of us have, the one hit, though I see that you are up to, 'the three hits'. A bit more that just a habit mate, but nowhere near the stage of Earl, he has really lost it, ODing on 16/18 hits

So take support from your fellow uses, You can do it!!!!

Harvey.

Just three "hits", ya think?

Photo Locker

Three hits to speak of you might say.

[NeedForSpeed]

Originally Posted by Trevor

Thank you Tony.

For some time I have been trying to raise the matter in a kindly manner. You confirm what I suspected. I sincerely hope others will understand. I sent up a high one and you caught the ball. A lot has been covered.

No need for explanation, but this is a huge step forward in respect of possible errors in communication. Harvey has only one arm, I only one eye and a hole in my head. Join the gang.

I'm right at home here, my brain is wired a bit differently too.
I'm left-handed, 'right-footed' and right eye dominant. I love what you guys are doing in this project.

As for Joe, I'm not 'as well' as Joe is, I won't even admit my SVXaholic addiction- won't admit how many SVX I have or what I'm doing with 'em, but I'm getting closer to doing so

[Dessertrunner]

We have news,
Steve tried the bypass trick from the front of the water pump around to the intake. It didn't work and seemed to be no better. This is a surprise, you would have expected that the decreased flow would have helped.
His idea now is getting back to were RallyBob was with Jacks engine. Bob opened up the inlet and outlet on the block to get greater flow throught the engine.
It appears that slowing down the pump won't help it just results in the block not getting enough coolent and the engine boiling.
So gentlemen we now know why electric pumps don't work as well. Have a great day.
Tony

[yt]

Originally Posted by Dessertrunner

We have news,
Steve tried the bypass trick from the front of the water pump around to the intake. It didn't work and seemed to be no better. This is a surprise, you would have expected that the decreased flow would have helped.
His idea now is getting back to were RallyBob was with Jacks engine. Bob opened up the inlet and outlet on the block to get greater flow throught the engine.
It appears that slowing down the pump won't help it just results in the block not getting enough coolent and the engine boiling.
So gentlemen we now know why electric pumps don't work as well. Have a great day.
Tony

Gasp... the pump is not the problem... /gasp

Glad to hear you now have your evidence to support it. Get a better manifold on there and try it

Tom

[SVXRide]

Originally Posted by yt

Gasp... the pump is not the problem... /gasp

Glad to hear you now have your evidence to support it. Get a better manifold on there and try it

Tom

-Bill

[Trevor]

Originally Posted by Dessertrunner

We have news,
Steve tried the bypass trick from the front of the water pump around to the intake. It didn't work and seemed to be no better. This is a surprise, you would have expected that the decreased flow would have helped.
His idea now is getting back to were RallyBob was with Jacks engine. Bob opened up the inlet and outlet on the block to get greater flow throught the engine.
It appears that slowing down the pump won't help it just results in the block not getting enough coolent and the engine boiling.
So gentlemen we now know why electric pumps don't work as well. Have a great day.
Tony

By passing the pump does not have the same effect as slowing the pump.

Nothing has been proven. Logic is ignored. The earth is flat.

[Dessertrunner]

BoxerSix any chance if I get a SVX crankcase to you that you can cut it up and figure out what mods we need to do to get the coolent flowing.

Next question has anyone got a SVX crankcase to give up its life so others may live. I am happy to pay something for it and the freight.
Tony

[RoughSilver92]

It doesn't look like any of the EJ crossover pipes will work. The O-rings tell the tale:
806933010 EJ 33.7x3.5
806937020 EG333 37.7x3.5

[RallyBob]

Originally Posted by Dessertrunner

BoxerSix any chance if I get a SVX crankcase to you that you can cut it up and figure out what mods we need to do to get the coolent flowing.

Next question has anyone got a SVX crankcase to give up its life so others may live. I am happy to pay something for it and the freight.
Tony

I have an EG33 that Tom gave me which had a tossed rod. Back in the spring Tom and me had discussed perhaps welding up the damaged area of the block, then cutting windows in strategic places on the block (covering with plexiglass or similar) in order to observe the flow of some dyed water within the coolant passages. I would spin over the OEM pump with an electric motor to simulate various rpms, easily done by varying pulley diameters. Or conversely I have an Aerospace Components 37 gpm electric pump which could also be utilized.

I have a feeling that a lot of the issues at hand relate to the fact that the EG33 has 2 more cylinders for the pump to pass water over, and therefore has a 50% further distance for the coolant to travel as well as 'potentially' 50% more heat to transfer compared to an EJ25. The way I see it, there must be a significantly greater dropoff of flow pressure near the rear of the block compared to a 4-cylinder EJ, and far greater surface friction.

[Boxersix]

Tony, yes I can hack an EJ257 case and get any dimensionality you require for the blocks. Not a problem.

If I had an EG33 case I could and would do the same for that.

For kicks, here are some pictures of an EJ257 crossover tube. It has been stated that the orings are different in diameter, by 4mm, but you may find that they still may fit and seal as there is plenty of room to port the EJ257 x-tube to still seal a 37mm oring.

Main x-tube ports are 27mm in diameter
Main x-tube ports are 298 apart center to center

Originally Posted by RallyBob

I have an EG33 that Tom gave me which had a tossed rod. Back in the spring Tom and me had discussed perhaps welding up the damaged area of the block, then cutting windows in strategic places on the block (covering with plexiglass or similar) in order to observe the flow of some dyed water within the coolant passages. I would spin over the OEM pump with an electric motor to simulate various rpms, easily done by varying pulley diameters. Or conversely I have an Aerospace Components 37 gpm electric pump which could also be utilized.

I have a feeling that a lot of the issues at hand relate to the fact that the EG33 has 2 more cylinders for the pump to pass water over, and therefore has a 50% further distance for the coolant to travel as well as 'potentially' 50% more heat to transfer compared to an EJ25. The way I see it, there must be a significantly greater dropoff of flow pressure near the rear of the block compared to a 4-cylinder EJ, and far greater surface friction.

Yessir. It's loss coefficients at work here in this damn EG case. I mentioned this as well in one of my posts where subaru used the same coolant castings and case designs as the EJ's for flow, yet did not relocate the coolant jacket outlets to balance flow around the cylinders themselves. When you compare the design of the EG33 coolant passages and inner castings to similar motors designs that do not overheats(EZ series, Porsche flat sixes) there is a huge difference in the amount of LC's in the coolant jackets(lower in the newer motors)

I wish my laser digitizer was bigger so I could scan these damn cases and plug the 3d model into Solidworks CFD and see what's going on in this thing


I'm going to run my EG33 in my WRX here in a mere week or so. If it starts to run hot as you guys are having, I'm going to drill + purge the case as I mentioned in my first post to see what it does. My setupo is not quite the same as everyone elses though.

I should also note that I am running the EG33 with the OEM WRX upper purge tank(the one positioned off the upper right intake manifold on the EJ20/25). It is plumed into the right side heater core hose(T'ed in) with the feed off the bottom of the tank. There is a purge line that runs from the WRX radiator up to this tank as well, and this tank is used as the main fill point in the system(highest point). I believe you can view the tank in the one picture I posted of my WRX front end. It way up just to the inside of the right side shock tower. You can see it better in this picture taken a couple weeks ago of my setup

[dynomatt]

Looks a lot more like a t-shape than the EG33 one.

The 04 WRX still runs the same pump as the EG33...same specs exactly.