dry decking
Turbo Mini Forums

Can any one tell me the pros and cons of having a dry deck as i havnt realy heard about it , And see lots off people on here do it, Why is it done?

the cooling waterways in a mini engine are floored there is nothing to make the water go every where it leaves pockets of hot engine mainly around cylinder 4 this is not good and usualy ends up putting holes in pistons
drydecking forces the water to go all the way across the engine block out the side back into the head all the way across the head then on into the radiator as normal
it helps to remove hotspots throughout the engine

Yes i moved to the darkside

Instagram @jdm_brett

Hope this helps . http://www.turbominis.co.uk/forums/index.php?p=vt&tid=297916 there is more on the search.

simon

Edited by madmk1 on 8th Aug, 2010.

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

thanks I have had the melting hole on number 4 cyl twice on my turbo mini that i did a few years back , after that i just took the motor out and put it in the shed , i am going to put it out and do a K conversion on it and of course turbo!
Now to just find a head

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Possibly Robert, but I think it's more important to get the water flowing around the engine and head properly.

I think the problem with no 4 being hotter is that it's difficult to get the water moving round it as it's furthest away from the pump and it can 'pool' around there and retain more heat than the water that is moving around the other cylinders

I would consider #4 head chamber a 'stagnant' area in the head in a convensional plumbed system. I dont think the coolant flow around the block is the problem. I dont think the distance from the pump is a factor either.

BAsicaly the pump pushes coolant down the 'front' of all cylinders. Some will flow into the head through the small holes in the 'front' of the deck of the block, but most of it will flow round the baclk of #4 cylinder and up through the larger holes along the 'back' of all the cylinders. This is perfectly adequate. The problem is in the head, the water is always flowing away from #4 chamber, rather than around it, and creates an area of little or zero flow, perhaps relying on convection or venturi effect to move it at that point.

I always thought the biggest reason for dry decking was purely to finish a race with a blown gasket?

There is that to, but how many on here with a dry deck actualy race that seriously they would sacrifice the engine just to win?

Thats the point though colin, i thought this was only really needed if you were that way inclined

Mine was certainly no issue, i piped the heater take-off back into the top hose via the turbo.

I'm dry decking mine and I probably won't see 130 bananas. I've seen that many people melting number 4 recently, it reminded me that prevention is better than the cure.

i have/am dry decking mine too id rather do what works now than pay for it later i intend on pushing the 5port as far as possible before the injected 7port turbo
i dont want to echo a molten 4th piston and probably will do a few head gaskets

Yes i moved to the darkside

Instagram @jdm_brett

Drydecking might improve the problems in cylinder 4, but cylinders 2 or 3 will be next to fail

On 8th Aug, 2010 Sprocket said:
Drydecking might improve the problems in cylinder 4, but cylinders 2 or 3 will be next to fail

Yes i moved to the darkside

Instagram @jdm_brett

In my experience (limited at that), and, speaking with other prominent presons, cylinders 2 and 3 are likely to fail before 1 or 4, and that is on cross flow 8 port heads, which makes you wonder why if its not the charge distribution.

Edited by Sprocket on 8th Aug, 2010.

Maybe it's that missing o-ring Col

Yeh, I'm never going to hear the end of that :(

I have been looking into this as well, don't really want to spend money on pistons and the engine for it to melt.

However for a car being used for road use would it be that necessary?

Finally i get the waterways have to be blocked off but what else in involved?

It certainly made a difference to the temperature of my engine. The water temp sits far steadier now, whether in traffic or driving hard. It used to fluctuate quite a lot before, but it's far more even now.
I just blocked the waterways in the block with grub screws & left the head as I only wanted the cooling benefit.
For what it cost me to do I consider it well worth it.

WWW.TURBO-MINI.COM

I sort of wish I had done this its a bit late now.

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

and how is the water redirected if not through to waterways?

i meen i know its through a seperate pipe but where does it connect to on the head and block?

Edited by Gaball on 8th Aug, 2010.

With a bit more research (a few more pages in on Google) seem to have answered my own question
The head needs machining at the flywheel end and the block feed is out of the core plug?

Think I might have to invest in the kit from TurboPhil as it seems like a good idea

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