14 replies to this topic

[malc_west]

Just as the title says really, what's the pros and cons of having either? Particularly interested in the weekend toy/track car/odd trip round Scotland type of comparisons

[DeadSquare]

Supercharged.

[malc_west]

Haha care to embroider on that answer

[DeadSquare]

It is so much simpler.  The hardest bit is fitting a different pulley on the crank.  It can be bolted on in an afternoon.  It gives a power increase of about 30%, much of which is mid range torque.

 

Will that do for a start ?

[sonikk4]

I would say its simpler to Supercharge your mini rather than converting to a bike engine and cheaper to boot.

 

When Promotive were still in business a R1 conversion would have cost you roughly £5.5k to £6.5k. Not a cheap conversion. 

 

Whereas all you have to do to a solid 1275 or 998 is to add a supercharger conversion kit. Probably less than half what it would have cost for a bike engine conversion.

 

A supercharged mini engine wont rev like a bike engine but will have a chunk of power and usable torque.

[malc_west]

What reliability like if it was tracked would the a series options give more issues than the yamaha?

[malc_west]

I thought promotive were back no?

[Tupers]

Most bike engines will be very peeky and want to live at high revs to make power.
Good on a pure track car with lots of lightweight bits but miserable in traffic.

A supercharged A-series will let you a lot more low end torque for less money.
Much more useable on the road and simpler if the car’s only for fun.

[malc_west]

Ok so what level of performance would you achieve with a say 4k budget on a supercharged engine?
Cheers for all the info boys

[malc_west]

Er it's 1275 metro lump atm

[sonikk4]

I thought promotive were back no?

 

Good question and to be honest i don't know. My lad was going to do the Promotive thing on Project Erm as was i on Project Paddy. 

 

He has since bought a house and thats eaten all of his cash. me i have gone down the SC Seven Port conversion route.

[sonikk4]

If the engine is sound, decent cam and cylinder head then you will probably be looking in the region of 130 to 160bhp. 

 

However have a good red read through this section and it may give you a far better idea

 

http://www.theminifo...rced-induction/

[Tupers]

It’ll depend on the current health of your engine but assuming it’s healthy you could get up to 100bhp according to vmaxscart.
https://www.vmaxscar...percharger-kit/

I’d speak to them and see what their thoughts are. Although the kit is only £1800 you’ll want to account for a thorough service and supporting mods like betters tyres, discs, pads and braided lines to suit your new power level.

[Ethel]

Turbo

[Spider]

Most bike engines will be very peeky and want to live at high revs to make power.
Good on a pure track car with lots of lightweight bits but miserable in traffic.

A supercharged A-series will let you a lot more low end torque for less money.
Much more useable on the road and simpler if the car’s only for fun.

 

I gotta agree in spade loads here.

 

Bike Engines, while making horsepower only do so by reving to almost beyond a scream. Horse power is Torque multiplied by revs. They have little torque and so don't make an idea car engine.