Dutchys Supercharger Project
Turbo Mini Forums

Yeh & no.
I meant 3000 at stand still because I was tuning at the time and the idle was up and down but more up.

Just had a thought...although its probably totally stupid and inefficient.

But what about a custom chargecooler that sits between the charger and inlet manifold like a sandwich plate but is cooled by the now reduntant air con sytem?

That may be a really nice and neat solution without the need for a seperate water system which could fook the engine if it ruptured. Although not sure what refridgerant gas would do to the engine if that got sucked through!

Andy

Some good info on the boost temps. Will keep that in mind. Once the idle came down air temps came down to around 50. I'm using the standard s/c pulley and. MPI bottom pulley although also running the alternator and water pump on the sMe multi v belt. Not sure what the boost is or will be. I have a boost gauge but not sure how accurate it will be.
Still in the early stages if tuning. Once I get the cooling injector fitted it will be going in the dyno for a complete tune.
It has been a trial and error project for me. I wanted a similar setup as vmax but with a custom intake and manifold to maximise air flow. It's running which I am rapped about considering the custom set up.

Edited by Dutchy1978 on 13th Nov, 2013.

Oh just for info those temps and boost pressures were at 6500rpm so if your already seeing temps of 80 at 3k then you will probably be in the same situation as i was by the time the revs are up there.

The alternator and pump wont change the speed that the charger runs at, this is fixed by the pulley diameters on the crank and charger. Certainly worth taking a reading of the boost when its on the rollers, anything more than 10psi on the m45 is just generating heat and the efficiency of the charger drops like a stone so power gains above this point are marginal.

Good luck with it

Is there a bigger pulley than standard? I am not looking for power records just some more torque in every day driving. Happy to have about 10psi. 80 was at a stand still so will see what happens while driving

Hi,
I had to have one custom made to 72mm iirc....although i covered it all on posts on here a few years ago.

The problem is even if its motoring along its unlikely the inlet air temp to the charger will be much lower than it was pulling in at a standstill. All the heat is just from how the air is compressed through the blower and is not related to engine temp.

Not sure what injecting fuel through the supercharger will achieve, you'd get the same result if you inject it after the charger. That said, do you intend to run the fueling silly rich to cool the charge? if not, then what is the point of the extra injector? The point of injecting water is that it does not significantly alter the fueling, but does cool the cylinder charge.

Also, high temps at idle probibly have nothing to do with the charger, but rather heat soak on the Manifold Air Temp sensor. This is a well known phenomena and your ECU should have settings for this.

Injecting before the charger is purely for cooling the air down. It will only be a mist during boost. It's known that fuel vaporisation contributes to the decrease of air temps. I'll give it a go and see what happens.
The last time I ran it the air temp was around 40-50 so not as bad. I'll keep an eye on the heat soak suggestion too. Thanks