Is it worth using an intercooler with supercharger?
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admire my excellent picture.... is it worth having intercooler?



mic

your not cooling anything by putting the cooler before you've compressed the air

the cooler will only work if between the charger and engine.

i'm no expert on suck through but i thought there is a problem with the fuel not staying vapourised when going through the cooler and thats why you dont see it done. i could be talking crap and am sure someone will be along to confirm or shoot me down in flames!

No that's right and you need your carb as near the engine as possible. What about the water/meth injection talked about in another thread on here somewhere?

arent there three designs of super charger install, one of which you can intercoolise the compressed air

With a blow through set up yes- blower, intercooler then carb.

so, suck through = get water injection for a few extra PSI of boost

blow through = get an intercooler or charge cooler and run quite a few more PSI

or dump the supercharger and get a turbo for some real power. lol

There was one at avon park last year in a Minus, the charger was at the front of the engine, went to an intercooler then into the carb via a plenum chamber from a turbo.

Edited by Jackman on 18th Apr, 2007.

Manchester Minis

Theres a part of me that wants a blown mini, with the blower at the front, a charge cooler somewhere else and an electromagnitic clutch (from an aircon compressor) to turn it on and off. But theres not much room for all that, using megajolt may help though.

"an electromagnitic clutch (from an aircon compressor) to turn it on and off"

just like in Madmax. quality film and a quality car!!

Madmax....hahaha

Toyota Superchargers have this elecvtric clutch built in to the drive pulley standard. Mine is on when igntion comes on. The maker of the kit, who runs a supercharged 1071 (I think) he claims there is no point with the on off switch. I agree, but for fun purposes then yeah for sure go for it!

Also he runs 12psi through his SC12 with water injection and get quite good results.

Supercharged 1964 Morris 850 - Now 1330cc with 7psi.

I'll take a blown XA coupe anyday! So why does the MR2 have a clutch on the blower if it comes on with the ignition anyway? Hmmm, interesting.

On the 4agze engine the blower is clutched so that when in cruise and light loads it is de-clutched to save on parasitic losses. That improves cruising (less noise) and economy.

Or so I believe

Every day is a school day ...........

How fast and how expensive ...... the same question...

Would there be any benefit of using a supercharger and a turbo? Could you use the supercharger until the turbo kicks in and then stop it?

Also on VW GTs, but how on earth could you get all that in a mini engine bay? Ah, so the blower declutches on cruise etc. What a great idea.

I was thinking of giving it a go.
My plan was an extended flip front like they for 16v conversions with the blower in front of the engine and the turbo in the usual place.

Hi,
Blow through ... blows through the carb, so therefore;
airfilter, blower, cooler, carb, head.
It's the best for performance but also the most difficult for installation.
Cheers,
Gavin :)

Edited by Bat on 18th Apr, 2007.

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My Mini build diary

The compressor and then the carb, so it blows through the carb. If you have the carb before the compressor it sucks through, and since most compressors are centrifugal and you're feeding a fuel/air mix in this set up there can be problems with the fuel literally centrifuging out of the air. De-atomising maybe

There is no sense crying over every mistake- you just keep on trying til you run out of cake.

if you have a suck thruogh -carb - charger - cooler - engine, your basically sitting on a fuel bomb!! it will pool in the cooler, the only way to intercool is to have blow through

i have a toyota suck through set up the same as slinky inc, haha i have a switch on mine though just for fun, it actually doesnt run the best with it off though so no point

and boost from idle.... mmmmmmmm

Have you ever seen the blown methanol dragsters go boom? If a intake valve head comes off the plug will light up the entire intake tract from combustion chamber through the blower and out the injectoin hat! Will lift the blower clean off!

the problem comes, with blow through setups and pos displacement chargers like the eaton one from the bwm mini, is to regulate the boost when the throttle is closed or at part throttle. I would be interested to hear solutions to this as is what im still struggling with right now.

I've seen the future and tbh its Pie

Hi,
Blown Imp has some sort of huge dump valve on his blower setup....
Koenigsegg have a system too....
Cheers,
Gavin :)

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I'm collecting bits for a supercharged and turbocharged 998.

Airfilter - Turbo - Intercooler - Supercharger - Intercooler - Throttle Body - Engine.

To get around the problem of the positive displacement blower pushing against the throttle at idle and light loads, I'm planning on using a bypass valve, made from a throttle body. This will close once the inlet pressure goes above 90kpa.

This is what the OEMs are doing on supercharged cars.

You can use a big dump valve as blown imp has done but if you watch his video this is opening at no-load.

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'm using the Eaton M45 and the GT1752. Both cheap and readily available.

They both sit at their peak efficiency at the peak air flows. Hence will require minimal intercooling.

The supercharger will provide boost from idle with the turbo coming in at higher revs.

Front mounted supercharger under a clubman front, turbo in the normal position.

Biggest problems are the blower drive and pistons for the 30 psi boost.

The design is complete and the bits are accumalating. Just need time to get everything else out of the way, but hope to compete at Avon 2008.

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."