Radiator Cooling

[Anonymous]

I guess you’d size the inlet and outlet for a given flow and as TB said they’d probably end up running cold. It’s better than running hot and potentially taking out your whole top end.

EDIT: You could also run and inlet vane to control water flow at given RPM/throttle positions. less open at idle/no throttle, fully open at full throttle.

I don’t know that they do this but it seems like a logical idea, I’d be surprised if there was absolutely no control whatsoever.

[Matt BakerMember]

Trailboss wrote:

Quote:

They run them cold LC they aren’t interested in wear rates just power.

TB

I guess if you got the money to build a beast like that in the first place you probably have a lot of money to spend on dyno time before it even gets near the boat, this dyno time can be used to figure out the best flow.

Some of the big races like the bridge to bridge take up to an hour to complete and the same boat may make more than one run (for different class skiers), so I beg to differ about wear rates, plus you’d at least want your engine to last a whole season.

[GregMember]

LC4skin wrote:

Quote:

Trailboss wrote:

Quote:

They run them cold LC they aren’t interested in wear rates just power.

TB

I guess if you got the money to build a beast like that in the first place you probably have a lot of money to spend on dyno time before it even gets near the boat, this dyno time can be used to figure out the best flow.

Some of the big races like the bridge to bridge take up to an hour to complete and the same boat may make more than one run (for different class skiers), so I beg to differ about wear rates, plus you’d at least want your engine to last a whole season.

The two bridge to bridge boats I have had something to do with both ran heat exchanger setups, that is simply sealed coolant in system that is passed by river water to be cooled and returned to the block as such. One boat crew used around 2 to 3 engines a season and the other a whole season with one engine.

An hr for an engine isn’t long so running it cold isn’t even an issue, even a season wouldn’t be 12 hrs but your bike or your car engine needs to be able to do how many hrs hundreds thousands

TB

[Matt BakerMember]

LC4skin wrote:

Quote:

525 cubes, 16psi boost, only reving to 6600rpm making 1800hp

Even though this sounds huge for a boat, I think its pretty conservative, add a new cam, increase boost to about 25psi and rev it to about 7500-8000rpm, I reckon upwards of 2500hp, but it might only last for one run or one minute!

And they already do 110mph, not many people could hang on for long at much faster speeds.

However they work they are pretty awesome. And the people hanging off the back are pretty insane.

[TrentMember]

They’re also getting consistent cool air.

Is God’s Gift still the biggest HP? I used to race as a young(er) fella and knew Ken Broughton who owned Mirage. I did race behind a TT boat once but the craziest fast races I did were behind a bullet with a 2.5hp and race prop at toukley, region 5 races which was a 15km sprint circuit. Zone 3 was pretty fast for me too, we raced behind my mates 3.8L V8 outboard and it had no worries pulling us 2 up over 80mph on a standard prop.

I think the superclass skiers average about 120mph don’t they?

[Bruce CurtisMember]

Now we’re onto real “watercooling”

No LC 1800hp isn’t much for that type of setup,(keith black Block?) but as TB said 12 hours in a season would fairly well pull up most dedicated teams.

Ok this heat exchanger you’re speaking of TB, what do you know of water over oil cooling systems?

BC

[GregMember]

Mr Blue wrote:

Quote:

Ok this heat exchanger you’re speaking of TB, what do you know of water over oil cooling systems?

BC

As is coolant used to engine cool oil Bruce?

TB

[Matt BakerMember]

not keith black, I think it was a chevy dart block

[Anonymous]

Trailboss wrote:

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Mr Blue wrote:

Quote:

Ok this heat exchanger you’re speaking of TB, what do you know of water over oil cooling systems?

BC

As is coolant used to engine cool oil Bruce?

TB

No, I reckon he means oil cooling systems. Some heat exchangers use oil in place of a coolant to transfer heat.

Turbos on most modern cars are oil cooled. They spin at incredible rates generating major heat (often glowing red) and run oil through the bearings to stop them from siezing.

The issue with oil in this application is that if the turbo isn’t left to cool for a period of time after extreme use the oil can crystalise in the bearing and because the turbine blades, turbo housing and bearings are often made from different materials too the rate of thermal expansion/retraction is different which can lead to stress fractures. This isn’t good.

Several industrial applications use oil in large radiators and cooling applications too. Some air compressors and turbines (steam and/or gas) use oil coolers to dissipate heat.

Even your favorite company PWR do oil coolers.

[Anonymous]

Re-read I take Bruce’s comment to mean the benefits of water as opposed to an oil cooled system?

Bruce’s comment was slightly hard to make clear, TB’s reply is just plain confusing, gotta love his lack of punctuation, each sentence can read in at least 3 different ways :laugh:

[Bruce CurtisMember]

Trailboss wrote:

Quote:

Mr Blue wrote:

Quote:

Ok this heat exchanger you’re speaking of TB, what do you know of water over oil cooling systems?

BC

As is coolant used to engine cool oil Bruce?

TB

Sorry lads had to work a little today and haven’t had much time for my primary function…posting on here, Yep TB last night a mate (440kw XR6) was talking about a little insurance, and water cooled, oil heat exchanger, or a water cooled-oil cooler

[Bruce CurtisMember]

Moto wrote:

Quote:

Trailboss wrote:

Quote:

Mr Blue wrote:

Quote:

Ok this heat exchanger you’re speaking of TB, what do you know of water over oil cooling systems?

BC

As is coolant used to engine cool oil Bruce?

TB

Several industrial applications use oil in large radiators and cooling applications too. Some air compressors and turbines (steam and/or gas) use oil coolers to dissipate heat.

Even your favorite company PWR do oil coolers.

I’ve worked in many places with these systems, the only issue is the oil on the outer of many heat exchange units forms a “skin” and the hot stuff just circulates up the middle, but some of the better ones (like my old GSXRs massive oil cooler) had wire spiralling up the cores to help turbulence.

BC

[Anonymous]

Why wouldn’t you use an air/oil cooler that are readily available in many shapes and sizes and available for almost any car that boys want to play with? Christ, there must be 50 to choose from for the XR6. It was good enough for Bugatti when they made the Veyron.

[Anonymous]

Mr Blue wrote:

Quote:

I’ve worked in many places with these systems, the only issue is the oil on the outer of many heat exchange units forms a “skin” and the hot stuff just circulates up the middle, but some of the better ones (like my old GSXRs massive oil cooler) had wire spiralling up the cores to help turbulence.

BC

I didn’t say it was any good :laugh:

Newer technology oils should prevent this from happening these days, older system were known to completely fail after the oil broke down, especially if they were used intermittently.

[Bruce CurtisMember]

Moto wrote:

Quote:

Why wouldn’t you use an air/oil cooler that are readily available in many shapes and sizes and available for almost any car that boys want to play with? Christ, there must be 50 to choose from for the XR6. It was good enough for Bugatti when they made the Veyron.

Drag racing with a hyped up Auto, not much airflow waiting in the lanes, and Rod knows his stuff I tips me hat to him any day of the week, the falcon is all his own build ex-factory, and he also has a 1951 dodge ute ready to be built and he’s done the 5.4 quad cam engine and had it dynoed running into a fancy gearbox, I used to show him stuff, now i learn from him………..
Also owns a little GSXR1127, that seriously hauls arse (ex-mine)
One of Robbie Phyllis’ old Superbikes- 1982 Kat 1100
His 30 yr old GSX1100
and a modded XR500 RD Pro-link

Isn’t life interesting?

But seriously would be interesting to know if anyone else has experience with these types of heat exchangers

[Author]

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