Twin-charging
#3
Re: Twin-charging
Originally Posted by ProfoundMoron
I was just wondering if anyone has thought about twin-charging there tC? I was just wondering.
Twin turbo, Turbo + supercharged....?
Actually I was contemplating something like that.....
#4
I have been since before the launch of the tC
It's a Supercharger + a turbo.
There is PLENTY of room under the hood for that.
They're twin charging MINI Coopers right now SPI is anyway.
I'm sure the results would be incredible on a tC.
It's a Supercharger + a turbo.
There is PLENTY of room under the hood for that.
They're twin charging MINI Coopers right now SPI is anyway.
I'm sure the results would be incredible on a tC.
#5
Hmm Interesting concept, makes sense. Have the supercharger feed the turbo, I think that would virtually eliminate lag and you hit maximum boost very early. Plus in that setup the boost from the supercharger spinning the turbo instead of the exhaust, the charge would maybe be cooler.
#10
Originally Posted by sublime
That's absolutely ridiculously useless. The amount of money spent on fuel management alone would set you back more than the power increase is worth.
SPi has a twin Charged MINI or two... The gains made by it are the most in the MINI community. Fasted 1/4 mile MINI on the planet so far. The MINI powerplant is very tough to add HUGE HP to. Which is why we have yet to see a MINI Break 300hp. But the Twin Charge MCS is even more advanced and faster than the MINIUSA "Drag" MINI.
Unfortunately, a MINI with that much HP loses it's nimbleness through a tight road course.
#13
Off the wall question,but.. how much PSI and thrust does the exhaust produce off the header at the 3k-5k rpm range?
Having a Supercharger run a Turbo doesnt seem like it would produce that much more PSI. Even then i wouldnt see why you would need more fuel supply if you had this twin charging over a single turbo? Turbos now can over PSI our 2.4's without any issue and you would still have to stay within limits
Spooling would be the only benefit, but again the Supercharger takes HP to run it.
anyways just a thought.
Having a Supercharger run a Turbo doesnt seem like it would produce that much more PSI. Even then i wouldnt see why you would need more fuel supply if you had this twin charging over a single turbo? Turbos now can over PSI our 2.4's without any issue and you would still have to stay within limits
Spooling would be the only benefit, but again the Supercharger takes HP to run it.
anyways just a thought.
#14
So...how would I start to figure out how to do a twin-charging set up...I mean, how could I find out what kind of turbo and what kind of supercharger to use, where to put them in the car, stuff like that? I mean...nobody has done this yet...so obviously there's not kit for it or anything...oh and which would be more effective, the supercharger or the turbo first? etc. etc. etc. anyone?
#15
People seem to have some misconceptions here...
There are alot of reasons why this is a terrible idea on the tC.
1) Some people were talking about the air going through the supercharger, through the turbocharger, and into the engine. This would produce a very large amount of boost with high variation. The reason is this: the air coming out of the supercharger has already been compressed past the 14.7 psi of atmospheric pressure. So, for simplicity's sake, say a turbocharger normally compresses the air at a 2:1 ratio. So, normally, it will take the ~15 psi of atmospheric pressure and compress it it 30 psi.
Now, if the air coming out of the supercharger is at, say 20 psi, the turbocharger will (at least try) to compress air at the same 2:1 ratio, and produce 40psi. This system would produce unreliable amounts of boost because with a centrifugal type supercharger (I'm assuming people are talking about adding a turbo to the TRD system which may or may not ever come out) the power application is similar to a turbo: boost increases with rpm. The result would be what is probably uncontrollable amounts of boost at higher RPM's. It would be a tuning NIGHTMARE.
2) People are under the impression that it would reduce turbo lag, but this is not the case, at least with a centrifugal style turbo. You would need a roots (screw) type supercharger to reduce lag, and even then the system would be hideously complex and expensive.
There are alot of reasons why this is a terrible idea on the tC.
1) Some people were talking about the air going through the supercharger, through the turbocharger, and into the engine. This would produce a very large amount of boost with high variation. The reason is this: the air coming out of the supercharger has already been compressed past the 14.7 psi of atmospheric pressure. So, for simplicity's sake, say a turbocharger normally compresses the air at a 2:1 ratio. So, normally, it will take the ~15 psi of atmospheric pressure and compress it it 30 psi.
Now, if the air coming out of the supercharger is at, say 20 psi, the turbocharger will (at least try) to compress air at the same 2:1 ratio, and produce 40psi. This system would produce unreliable amounts of boost because with a centrifugal type supercharger (I'm assuming people are talking about adding a turbo to the TRD system which may or may not ever come out) the power application is similar to a turbo: boost increases with rpm. The result would be what is probably uncontrollable amounts of boost at higher RPM's. It would be a tuning NIGHTMARE.
2) People are under the impression that it would reduce turbo lag, but this is not the case, at least with a centrifugal style turbo. You would need a roots (screw) type supercharger to reduce lag, and even then the system would be hideously complex and expensive.
#16
Originally Posted by ProfoundMoron
So...how would I start to figure out how to do a twin-charging set up...I mean, how could I find out what kind of turbo and what kind of supercharger to use, where to put them in the car, stuff like that? I mean...nobody has done this yet...so obviously there's not kit for it or anything...oh and which would be more effective, the supercharger or the turbo first? etc. etc. etc. anyone?
Turbo charged
Not to mention the plumbing, which would be a complete nightmare. Trust me, a well built and designed super or turbo charged system can provide any amount of power that you want. For the money that you would spend on R&D, parts, and labor for a setup that you're talking about, you could have built a 2AZ w/ a bullet proof bottom end and a super or turbo charged setup putting out as much boost as you like along w/ the needed electronic a/f management.
#19
you are thinking about the "CURRENT" supercgharger options.
If the guys at SPi can cram a twincharge unit in a MINI.... they or another pro, can do it.
And being the owner of both a MINI and a tC, the tC has far more space to work with. :?
If the guys at SPi can cram a twincharge unit in a MINI.... they or another pro, can do it.
And being the owner of both a MINI and a tC, the tC has far more space to work with. :?
#20
when you say twincharge, are you talking about supercharger+turbo or Turbo + turbo.
In theory the supercharger + turbo should work, but controllable amounts of compressed air go into the engine, with does break down the engine, and makes tuning near impossible. its better to have just one small turbo, and one larger turbo.
In theory the supercharger + turbo should work, but controllable amounts of compressed air go into the engine, with does break down the engine, and makes tuning near impossible. its better to have just one small turbo, and one larger turbo.