56 replies to this topic

[adam davies]

I'm in the process of rebuliding an engine for my mini .The plans for the engine is to rebored to 1293, Kent 276 camshaft and Med stage 2 head. I'm just wondering if a lightweight flywheel will be a good idea for it. I'm sure this topic has been discussed many times but I couldn't find one on search so I apologise if your sick of answering this. The car is a daily driver. At the moment it seems to be impossible to stall my car and I've read that a lightened flywheel can make it stall quite a bit.

Thanks in advance for your answer

[oltonlad]

you shouldn't have any problems with the lightened flywheel, the 276 cam is quite lumpy on tickover and a lightened flywheel will exaggerate this though.

[jaydee]

You'll have less low down torque, especially with the 276.
Its is good for acceleration though.

[adam davies]

I do like acceleration, and I do like torque Would i lose a lot of low down torque with the flywheel?

[jaydee]

Yes, you'll need to rev it, but once it comes on cam, you'll see the benefits of a lightened flywheel.
It also depends how much is lighter the new flywheel, verto flywheels can be lightened by about 1kg, pre verto can be ultralight..
Also if med are building the cylinder head, i suppose you give them the engine spec to build the head to suit your engine, so why not asking them an opinion?

Edited by jaydee, 08 May 2012 - 09:53 PM.

[adam davies]

The head is already built. Its's a head off my father's old cooper. Do you think I woull see the benefits of one and is it worth me purchasing one?

[jaydee]

I have one in mine and I would fit a lightened + upgraded clutch anyday, but try to gather more opininions about that before purchasing.
It also has to be balaced together with crank pistons rods and damper if you want the engine to rev smoothly, espescially above 6k rpm (but i dont hink that your case)
It is also very important that you have the proper valve size to match the camshaft, if they're standard size, the cylinder head wont breathe enough for the camshaft, 35x30 valves should be ok for the 276.

[adam davies]

Ok thanks a lot for your advice

[jaydee]

I would add that some will point out that the 286 will be far better for a big bore engine, lumpy as the 276 but more power output.
For a daily drive road engine i'd rather go for a 266, which has a good low down pull.
Always depends on your driving habits, seen people hangin around on a Sw10 or even a 296..

[Cater_Racer]

I run a Ultralight Steel Flywheel - 4.432kg - inertia type on a 1293cc stage IV, and it's not too lumpy for road use.
It comes off the line like a scolded cat.

[racingbob]

no, you will loose your torque i tried it on mg metro

it was horrible, original back on the next day lot better

in my opinion real light flywheels are for high revving engines
and balanced to take the revs, with high cams

[adam davies]

Looks like there is mixed emotions with them Does anyone have one on a daily driver?

[jamiestevenbell]

i cant see why you would have a problem with a lightened flywheel on a daily driver, you will be fine as its on a 1380 so that will make up for what torque you lose

[jaydee]

Its a 1293 not a 1380..

[jamiestevenbell]

i personally would go for it i think it will be fine and i must hav got mixed up with another thread on here