Jump to content
SAU Community

Recommended Posts

I've been recently reading up on the differences of between turbochargers and superchargers - interesting read I must say ;)

Now this question occurred in my mind:

Is it possible to stick both a turbocharger and supercharger into a twin turbo car (let say an R32 GTR 'cause I love them)?

If it were possible what would the benefits be?

Seeing as there would be turbo lag, would the installed supercharger cover for that initially (and once it kicks in, ;))?

Sorry, if a similar question was posted. I was too intrigued my hand couldn't stop typing :D

Thanks in advance.

Link to comment
https://www.sau.com.au/forums/topic/258601-two-kinds-of-turbo/
Share on other sites

stockymystock has an rb30 turbocharged and superchareged

can be done, costs lots of $$$, lots of custom work and changes

twin turbo is easier, cheaper, more normal

a good twin turbo setup would negate the require for super & turbo

as it would provide good average power, remember superchargers suck some power to give some power

its not like its free

sure a supercharger needs crank hp to run, but since it creates boost as soon as it starts turning, and feeds it straight back into the engine to create more power, the hp needed to run the sc is then accounted for. feedback cycle.

eg. engine 100hp

sc 50hp

sc boost power gain 100hp

total hp when you use the engine with sc = 100 - 50 + 100 = 150hp. net increase in power even though the sc takes 50hp, it gives back more almost immediately.

the energy is supplied by the additional fuel burnt as a result of the increased intake charge pressure. you wont experience any 'lag' from a supercharger

the power is not free, you pay for it in fuel. but you dont 'lose' any power from having a sc

if you can do fab work yourself and have the mechanical knowledge, it can be a cost effective option

of course it takes a specific application to require a super/turbo combination.

in track, drag, or most race applications, low end driveablity and torque down low is not usually a factor as gearing and driver skill is used to keep the revs in the powerband (top end of the rev range).

twincharging can be done relatively cheaply using aftermarket parts such as toyota factory superchargers.

unless you want something different there is probably an easier solution to lack of low end torque with a large turbo.

i would suggest a good ecu setup with anti-lag and the use of cheap t3/t4 based turbo chargers (as you'll probably have to replace it once in a while depending on your use of the anti lag).

or nitrous

Is it possible to stick both a turbocharger and supercharger into a twin turbo car (let say an R32 GTR 'cause I love them)?

Sure. There are a couple of aftermarket cars that have been twincharged, and Volkswagen has a production one.

Benefits are no lag at low RPM while getting more power down low thanks to the supercharger, and at high RPM you can enjoy the better efficiencies of a turbocharger.

The problem is getting it all to work together smoothly.

try looking at the twincharged s15 on youtube; was a fantastic watch and the results were fantastic.

sr20 yes but there was almost no lag so on an rb26 i doubt there would be any

are there any superchargers that disengage at a certain rpm???

So do turbochargers.

Technically yes, but in practice: they're sucking energy from waste gasses that are just being ejected out of the car anyway.

They do cause restriction, yes. but they don't suck raw shaft engine power

I believe the superchargers on the 4agze does that.It has a clutch on the blower drive much like an ac clutch

Yep.

I'm pretty sure the supercharged Merc engines have them as well.

They do cause restriction, yes. but they don't suck raw shaft engine power

And that restriction causes pumping losses. Stick a restriction in your exhaust, and see what happens to your power output. It's irrelevant whether that power "loss" has come from something attached to the crank, or something stuck in the exhaust. A power drop caused by an induction charger is still a power drop.

Its misleading to say superchargers "draw power to make power" as a pro against turbochargers, because the latter does the exact same thing.

Turbochargers are more efficient because they draw less power to give the same gain, but its not the free lunch some people make it out to be.

Edited by scathing

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • It is a kunfine Android screen . Does anyone know the wirering diagram of the fuga ??
    • just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Awesome, thanks for sharing!
    • To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
×
×
  • Create New...