finalzero

Hi,

I came across a add in an old copy of Banzai featuring some compact inline superchargers.

Two were fitted to a Honda Civic Type-R that was being RR'd and they looked damn small. Crazy idea I know but something I saw allot of when I was in Oz, quite a few turbo motor's were assisted by superchargers.

Superchargers are called Rotrex if anyone is wondering..

Would make a crazy drive, pure boost across the rev range and then the added punch of the turbo kicking in ;-)

finalzero

Even better:

VWvortex Forums: 4 Cylinders, 2 Turbos, 1 Supercharger....Insanity!!

Shark Man

I honestly don't know why more people don't do it.

Perhaps the feel of speed from kick in the back is more important than the lag that preceeds it and lack of throttle response?

GazTheHat

That's the first picture i think of when someone mentions supercharger.

So come on then, why aren't we adding supercharger kits?

How much and how efficient would they be??

Shark Man

I suspect it because everyones too girly to have a manual steering rack or live without the a/c and wants to boast about peak power instead of power spread


(just joking - it can be done without removing them...but its obviously the easier way to bin the PAS or a/c in lieu of a nice compact centrifugal supercharger )

vindaloo

How much time would it spend in the garage being fixed more like.

And how long would you stick with it, knowing that it's not perfectly driveable or adaptable to everyday situations.

One big s/c and no turbo would do, providing it's the right s/c.

J.

dunx

iTrader: (3)

Most modern superchargers are :- A turbo + gearbox - hot bits.....

Thus the boost is similar in profile to a turbo, as both are centrifugal devices....

It also costs money to develop a kit and supply a new exhaust to replace the un-wanted turbo bits.

So nobody bothers....

Dunx

P.S. Still fancy trying to squeeze a 3-litre supercharged intercooled flat 6 into an Impreza....

RRH

My tuning man is fitting a supercharger to a 200SX for a customer at the moment- its running such a massive turbocharger that the lag is even worse than my evo, so the supercharger should give some low down grunt while the turbo spools.

Reckon it will do about 1mpg!!

finalzero

Subaru Impreza 2.5 RS Supercharged

I think the application is possible to a turbo charged impreza, would reduce lag and give one smooth power delivery as the turbo comes on song.

Something like the compact Rotrex Charger would work (Rotrex) as its small enough to fit inside the engine bay, would require some grafting of parts but I think its possible.

L33_WRX

YouTube - Raptor Supercharged Subaru 2.5 RS

Shark Man

137kw at the wheels = about 270bhp. Not bad...seeing there is no lag.

Would like to see a proper graph on a rpm plot (not the fudged km/h one in thr vid) of that though and compare it to the one someone posted here the other day where their car did a nice peak 300odd BHP but was completely dead in the water below 3800rpm

D17KDB

I had a supercharger on my civic and it was great. When i then got the scooby. I then had to get use to having the lag as i was use to the instent power. Mine ran off the power steering but i still had powersteering. Someone further up the page said u had to do without. Not the case. Would be great to have it in a scooby

Simon 69

Superchargers arent efficient though, unlike turbochargers; where you really do get something for nothing.

Shark Man

.....nothing being that nothingness you get below 3000rpm and that nothing for half a second wait when you floor it at high revs.

Shark Man

I didn't say it cannot be done, I said it would be easier

In the Impreza engine bay, if one removed the PAS and relocted the coolant header tank or instead, removed the A/C compressor, one gets a very handy void to squeeze in a compact vortech or ESS style s/c unit in.

Otherwise it requires a little more modging, bodging and fabriction of brackets and tensioner pulleys to squeeze it in.

TonyBurns

iTrader: (3)

Its a bit obsolete having a supercharger and a turbo (unless your vw and look at the mess they made of the golf gt ) as the likes of twin scroll turbo's change the way the power is put down, giving a smooth delivery from very low down to the red line

Tony

The rookie

iTrader: (1)

What tony like the 170PS latest Golf 1.4TSi is old hat? The older Golfs were just supercharged....

TSI-Twincharger-Motoren

Simon

GazTheHat

So it's not worth getting a supercharger to accompany the turbo?

Shark Man

Better to use a decent turbo instead; Twin scroll is the better option.

Unless you already have a suitable s/c lying around or decide to fit an oversized turbo.

GazTheHat

Well i went for the 18g to retain drivability.

Just thought if whacking a big turbo on that you could counter-balance lag with a supercharger. But it seems it's not a £1-2k bolt-on option.

TonyBurns

iTrader: (3)

Thats the one (i think) called the GT, doesnt acutally work very well, hence you look at the other manufacturers, most seem to be going for twin scroll on their small engined cars (peugeot 207 gti for instance).

Tony

The rookie

iTrader: (1)

I disagree, it works very well for what its meant to be which is a very economical car for 170PS, the golf V is pretty lardy, the twin charged 1.4 moves it around at a pretty reasonable pace (bear in mind its the same power with more torque than the old 2.35L VR5 engine) but with better economy than the just over 100bhp 1.6 engine.

While a twin scroll will get you peak torque at a similar rpm in high gears, the lag will always be worse, and the boost won't get there at such a low rpm in low gears as the engine is accelerating.

Simon

cos500

I came accross a rather rapid little nissan micra, the first shape, a couple of years ago at the pod, had a turbo and a supercharger from the factory (japan), only one in the uk back then (1999), Went well and ive never seen another.
Im sure you could fit both under any bonnet if they can do it to a micra.

The rookie

iTrader: (1)

Nissan March super turbo......

Simon

doppelganger

i have a vf37 twinscroll going on my new engine with anti lag ,i reckon it should go ok,but the procharger is what the likes of john sleath are using