Turbo or Supercharger?
Turbo Mini Forums

Hi guys
i have spent the last 3 months designing two forced induction systems for my mpi mini, doing all of the calcs and everything i should be able to get about the same horse power from both applications. so i am wandering what you guys would go for?

Turbo	32 Votes - 0%
Supercharger	5 Votes - 0%

Turbo without a doubt...:)

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1/4mile in 13.2sec @ 111 terminal on 15psi

Turbo everytime.

I'm firmly in the 'no SC will produce more top-end power than a turbo' camp; whatever your calcs say.

So if the calcs say the bhp will be the same then the turbo setup will be working much more efficiently.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

It really depends on what you want from the engine. However a VNT turbo can give you the torque you'd expect from the SC. And it's more (thermally) efficient and smaller.

So at the end: turbo.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

Turbo every day! nothing like that kick up the arse to put a smile on your face.

Turbo all day every day, nothing like that kick when you come on boost...

Is it also not easier to incsrease the boost on a turbo (you use a bleed valve) where as a SC you changed the ratio of the pulleys?

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


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And you WILL want to increase the boost at some point.

It's usually sooner than you think as well.

In the 13's at last!.. Just

ok well turbo it is then boys, i have been reading around and some of you use the t2 and some the t3, the impression i get is that you don't need to cut the bulkhead to fit the t2 but you do for the t3 any advice guys? i am going to keep a picture diary of the install so you guys can see

What did your calculations tell you? Surely they should steer you in the right direction rather than relying on opinion??

(I'm not disagreeing with the turbo choice, just questioning why you are asking...)

What did your calculations tell you? Surely they should steer you in the right direction rather than relying on opinion??

(I'm not disagreeing with the turbo choice, just questioning why you are asking...)

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

T2 t3 or too olds , go for newer turbos, you'll have the supercharger effect combined with a turbo .

well i have a supercharged 1275, it hauls from the work go but my clutch doesnt like hard take offs lol... running 7psi and i cna t intercool because it is a suck through setup, i would rater of turbo'd it but this was the chearer option for me at the time (poor student)

carazy1275, you say you went supercharged as it was cheaper. you can go turbo for £200 to £300 how much cheaper was the super charger?

well my engine plus supercharger and mainfolds cost about $1600 new zealand dollars, about 400 quid - that was including a metro doner car.... unfortunatly metro turbos are rare as hell over here and i couldnt find one for sale - mine runs a s12 charger off a toyota levin

Both. If you were to have a turbo blowing through a supercharger, you get the mass transfer of the supercharger at low rpm's, as the turbo starts boosting, the dP across the blower reduces until 0 or slightly +ve and then you get the benefit from the turbo, which you could size right and get some serious welly. I suppose you could use a longer cam (like a 286) and then waste a load of boost as blow by and then utilise the mega boost of the turbo as well as a good fuel to produce mega welly. Snag is this. It's a mini. Do you really need anything over 140hp?

Bearing in mind at about 12 Psi, an Eaton M45 (bini blower) is having about 30hp at 6500rpm (IIRC) and with a turbo, you'd get that back, not much weight for 30hp. I love blowers but they lack at the top. You really do need the best of both worlds

It's a hell of an amount of fuss to go for a mini though. When you start talking proper bucks, I want a Dutton Phaeton with a full race V8.......

Edited by Hedgemonkey on 21st Mar, 2008.

Bugger off, I'm getting there.