4agze twincharging?

[h8wrxs]

gday

random question

ive seen pictures of twincharged 4agze's on the net and id quite like to build one

so hypothetically say i got a 4agze engine, stripped it down rebuilt head to toe with all new forged pistons and rods etc adn set up the sc12 supercharger on the back and everything, but bolted on a turbo on the side, is there any reason it wouldnt work?

and if i did would it matter if the turbo ran higher boost then the supercharger?

[Lloyd]

Most kits/setups are with one blower feeding into the other. Depends if you want to go that way or have them both feeding into a common intercooler separately, in which case you'll need to work out how to switch between them nicely. Good thing with the SC12 is the electric clutch on so you can simply turn it off when not needed

[tsoob]

its far easier just to turbo tho....

[barryogen]

Most of my reading on twin charging got to a point that said go "filter, turbo, SC, IC, TB, engine" for ease of use.

They almost all said chose a turbo that seems massive, and a supercharger that seems small.

All said avoid the Toyota SCs.

The SCs off the mini(Eaton M45 or MP45 from memory) seemed to be a common choice up to 2L engines.

Matt Dunn has played with twin charging, and had something like 30psi of boost at idle... I'd imagine it would make it almost undrivable.

[Crampy]

Twincharger setup for the VW Twincharged TSI engine.
From memory it won engine of the year a year or two ago.

Not made for outright horsepower, but make a small displacement engine have a very broad torque curve and make good decent power right through the rev range, which cannot normally be achieved. You normally have to sacrifice power at one end of the rev range to make more power at the other.

The bypass valve is for when the turbo starts using more air than the positive displacement supercharger can provide. It opens allowing more air through and hence the turbo will boost higher than the S/C was. The Toyota S/Cs would be good for this, as you could declutch them once the turbo takes over the boost producing role.

It makes for a very complex intake and will cost a lot of money to setup get tuned correctly. But I suppose if you are willing to get it up and running, the torque delivery would be amazing.

[tsoob]

this setup up using a PWR water to air cooler would create the most awesome street driven weapon

[Crampy]

this setup up using a PWR water to air cooler would create the most awesome street driven weapon

Yes, yes it would.
I'd say it'd be a bit of a waste of time in a FWD though, as it'd just be spin spin spin everywhere.

[FXGTV]

If i remember right there was a god awful ae92 fxgt with a huge kit, crazy paint job, and a twin charged 4age. last i heard the engine blew and its just running thr turbo now

[tsoob]

If i remember right there was a god awful ae92 fxgt with a huge kit, crazy paint job, and a twin charged 4age. last i heard the engine blew and its just running thr turbo now

there has been a few of these, about 4 years ago there was a really nice one made in australia it was red 4 door, if any one has any pics post them up it was mint.

[JustinSpiderholden]

If i remember right there was a god awful ae92 fxgt with a huge kit, crazy paint job, and a twin charged 4age. last i heard the engine blew and its just running thr turbo now

there has been a few of these, about 4 years ago there was a really nice one made in australia it was red 4 door, if any one has any pics post them up it was mint.

Ah I have got the hot4s magazine with this car on the cover, had the plates 4pervn or somthing

Was running a 4agze, with twincharging, guy had put alot of thought into the built and was extremley cool, I loved the twin air filters one for the sc and one for the turbo

The other one i rember was Dan Rucis, old rolla from perth, had a widebody feel's kit

Both really nice cars

[tsoob]

you know what month hot fours? i remember the car just like to get the mag.

[Crampy]

Please, don't do it like this!!!

[xsspeed]

Thats some sweet braided hose going round the cambelt covers there

[Crampy]

Thats some sweet braided hose going round the cambelt covers there

Yep, pretty ugly isn't it. Not to mention the welding and the nice joins on the intercooler pipes.
I mean if you're going to go through the effort of twincharging, why use the 4AGZE intake and add to it, it's poo! The inlet manifold is $hit and it's so easy to make it way better.

That's the way the HKS twincharge kit worked, it just added to the 4AGZE.

I'd say if going twincharge, go for the same setup as the VW TSI motor and use a 4AGE inlet manifold for starters.

[RomanV]

But I suppose if you are willing to get it up and running, the torque delivery would be like a larger displacement engine.

fixed?

[Crampy]

Na, I like it the way I said it better.

[matt dunn]

Matt Dunn has played with twin charging, and had something like 30psi of boost at idle... I'd imagine it would make it almost undrivable.

Yeah, and it did.

We did back to back testing on a two day event and found that a s/c sucks too much power.
We removed the S/C and bridged it with a piece of exhaust tube bent into a u shape,
and the car was way faster and more driveable, easier on tyres, and more predictable.

[h8wrxs]

so basically i would be throwing money down the drain, because it couldnt be driven comfortably?

[RedMist]

Twincharging is an 80's patch to large turbo lag. Turbos have come a long way in 25 odd years. I'd just spend a tonne of time playing with turbo maps until you find one that suits the power and delivery you want.

You wouldnt even be able to tell that my V6 is turbocharged if you didnt hear the blow off valves. Power delivery is that smooth and instant.