1380 stage 4 head supercharger project **warning SLOW build**
Turbo Mini Forums

Hi Guys,
Thought i would start a fresh build post going, Basicly I killed my 1380 so alot of the engine can be saved but i didn't want to just rebuild it and put it back in the same so the plan is to lower the CR and chuck a supercharger on it for abit more fun.
To start the build off i though i would go to a front rad. so have a few pics



oo and just to spice it up i painted the charger black.


and a pic of the car its all going in. Old pic may change the wheels.....

Nice cant wait to see this project, will you me making your own manifolds or buying them?

bought some that i plan to moded to give a form of charge cooling... more will be reiveled.

Right, this is my idea, I have bought a premade set of manifolds which i then plan to get modd think it will be more than i can do so may need to sub contract the work out


The ideas is to create a water jacket around the manifold to bring down the charge temp. If i pump water round a rad with a electric put then in at both ends then out at the top the idea i can remove some heat. I know its not ideal but space is short and theres no space for pipe work runs to intercoolers.

Been on ebay..... oops well got my manifolds just waiting for them to show up to start the modding, a mate of mine has had some ideas on increasing flow but he is keeping things close to his chest. Thanks you Paul S for the 850 which i hope to get in for mockup soon so i can check things will fit and get the cooling hoses done.

Been looking a small bike rads for cooling the manifold water. Not sure where it will end up. The oil cooler has been moved to the wing with a ally duct i am making up.

I'm not sure to understand what you are trying to do. You don't want I/C, right ?
Cooling down the manifold is probably a waste of time because it's heated by the engine, same water as in your cooler. It's probably better to improve the overall engine flow to decrease the boost you need for same HP level. If you compress less you'll heat the air less.
The other option is to use a turbocharger :), the overall efficiency is better, so even less boost. I don't want to start SC/TC fight, just a remark .

Edited by alpa on 24th Oct, 2008.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

the cooling will be a seperate systerm having it's own radiator like a charge cooler. So will reductce the. Charge temp
problem for me going for a turbo is I had free of charge the supercharger making it more cost effective. Also don't want to cut the bulk head.

Good idea Alex.

At 15 psi boost and 25 deg C inlet air temperature, the temperature at the blower outlet, assuming 60% adiabatic efficiency would be 141.5 deg C.

So detonation here we come unless you drop the compression ratio a mile or use some form of cooling.

Even cooling with 80 deg engine water would be better than nothing. Separate rad even better.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I've no idea how much heat transfer there will be between the inlet gasses and the manifold Walls but there must be a fair bit or your exhaust would not get hot to touch. I think I'll use aomthing like a bike rad and electric pump to cool it. Cheers

got my manifolds though to day. Need to get two 90deg 2inch bends from a exhaust place now then I can start cutting and welding access to a band saw would be good, have to work on that.. Changed plan alittle the top half of the "sleaving" boxed rather than tube all the way round. Will be easyer to make. Cheers

An idea would be to box out the whole of the plate the attaches to the blower.

Also put some fins in there as well.

Maybe even direct the water about a bit.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

started playing, was hoping to get things done in metal, but the Mrs had a parking fopar in her Audi so i had to pull the bumper out and nock out the dent which took alot of time.

where are the injectors/ carburation going to be situated?

carb up front as per normal on this convertion.

Will be good to so the results of how this works compaird to the standard charger conversion. Make sure you keep updating the project, im going to be cooling my inlet, but its wont be anywhere near as good as this, as i plan on using a downdraft inlet and just using the standard built in inlet cooler pipes.

i really hate to put a downer on this, but i really think the results from this will be minimal if anything.

there is simply not enough internal area to cool the charge significantly imho

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

you may well be right but I can't think of any other way of getting any cooling. I hadwonderd about wraping the manifold with cooper tube wound round the manifold as a Easyer way to test to see if any power is gained but I think that would be even less effishant.

so does the blower have some kind of mount or brace or does it all hang on the manifold?

normally yes the full weight is on the manifold but vmax do a extra brace which I think I will either get or make my own

Right got abit done today, spent some time smoothing the manifolds getting rid of the bummpy welds to smooth out flow.
Hit a big problem with the water jacket, the bolt hole is tucked up under one of the pipes to the inlet ports, now its a fiddle but the bolt will go in but if i box it up theres no space for the bolt to go. i could put a tube though for the bolt but it would mean notcing out the inlet pipe and welding it in which would reduce the flow to that port.. any ideas?

use a long bolt going through a sleeve in the water jacket?
also weld loads of fins to the inlet manifold and create as much water turbulence in the waterjacket as poss.
could wrap in copper tube and braze the tube to the steel manifold for mucho heat rejectiono.

the problem is the manifold inlet tube blocks the hole so you have to angle the bolt into the hole then drop it though hole and tighten it up. Do we think coiling copper tube round and brazing to the steel manifold will transfer much heat? Could then just flow water though the tube.

Made some progress over the weekend ground the manifolds out so there's no lips on it.

also another thing to maybe consider is fuel condensing on the inlet wall, im not sure whether this will be a big issue at all, butbest thinking about it now rather than later

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

I too am concerned with the theory behind this.

What you have to consider is why every manufacturer heated the manifold on a wet manifold system.

I have bit my tongue before no, but Joey has a point. Thats why I asked where the carb/ injectors were.

It may be a right slug on a cold morning on cold start and not much better on a long drive on an equaly cold day.

Just before you go and butcher your manifold, consider the effects, but, by all means do it and proove us skeptics wrong