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156 2.5 lightweight flywheel??

I have been looking around for one & it would appear that they are not made.

Any reason for this?

Is it simply that they have no demand?

I had a one piece Dynamically balanced billet steel one made for my previous car (MG ZS 180 KV6) & it transformed the acceleration (also had a Quaife ATB diff for the twisty stuff)
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Can I assume that no issue will arise if fitting a one piece dynamically balanced billet steel one then ?
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V6 flywheel is pretty light to start with.
On the backside it has the pick up ring for the crankshaft tdc sensor.
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Quote:
Originally Posted by Allerd View Post
V6 flywheel is pretty light to start with.
On the backside it has the pick up ring for the crankshaft tdc sensor.
Cheers for the info.

I read that the flywheel is around 8kg.Taking this to 4kg or so can make a very noticeable improvement IME.
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It's a v6 engine, you cant just put lighter flywheel on. On a inline 4 it's easy because every piece must be in perfect balance (or altogether it doesnt matter)
On a v6 the flywheel is heavier on one side and on the other side the pulley is heavier to but 180į rotated compared to flywheel.

Try some search on v6 balancing...
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Quote:
Originally Posted by alan Q4+33 View Post
It's a v6 engine, you cant just put lighter flywheel on. On a inline 4 it's easy because every piece must be in perfect balance (or altogether it doesnt matter)
On a v6 the flywheel is heavier on one side and on the other side the pulley is heavier to but 180į rotated compared to flywheel.

Try some search on v6 balancing...
Interesting.

So

https://www.alfaowner.com/Forum/alfa-...-flywheel.html

http://www.ttvracing.com/AlfaRomeoflywheel.html could be the answer.

It was TTV who made my last one

Last edited by shroonie29; 17-06-12 at 16:37.
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Hope the above didn't come across as me trying to be clever,just hoping to find a solution before I get my 2.5 Busso 156
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As per the other thread:

The gta flywheel is lighter than a 2.5 156 fw.

Strictly speaking, the flywheel, crankshaft and crankshaft pulleys (cam and aux belt pulley) should be balanced together.

Which all makes fitting a lightened fw very expensive. Whilst you're there with everything in bits you may as well get the bottom end (rods and pistons) balanced too...

I'd also consider some total seal piston rings.


The flywheel you've linked to will probably still need to be balanced with the crank shaft and crank pulley. In addition, the 2.5 is lacking in torque, a lighter FW will not help things.
 
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Quote:
Originally Posted by Chris155 View Post
As per the other thread:

The gta flywheel is lighter than a 2.5 156 fw.

Strictly speaking, the flywheel, crankshaft and crankshaft pulleys (cam and aux belt pulley) should be balanced together.

Which all makes fitting a lightened fw very expensive. Whilst you're there with everything in bits you may as well get the bottom end (rods and pistons) balanced too...

I'd also consider some total seal piston rings.


The flywheel you've linked to will probably still need to be balanced with the crank shaft and crank pulley. In addition, the 2.5 is lacking in torque, a lighter FW will not help things.
So in essence it's a no go without many £ spent then
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More than the car's worth...
 
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More than the car's worth...
Cheers Chris.

Guess I'll have took @ other avenues for sharpening a 2.5 156 then
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Cheaper to just buy a GTA...!
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My old 3.0 156 is for sale, local to you too... (Treuddyn, Flintshire I think)
 
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Cheers chaps,but awaiting an insurance payout before I can get my Busso 156
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Quote:
Originally Posted by Chris155 View Post
My old 3.0 156 is for sale, local to you too... (Treuddyn, Flintshire I think)
However,do you have a link to that?
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No link as such, the fella I sold it to, despite needing to sell it, isn't being very proactive. His Mum's driving round in it ATM.

When I sold it, I'd just fitted a freshly rebuilt 3.0 V6 in it. It's got a PECO exhaust on it (My first 156 V6 was used as the template car) , 17" Selespeed alloys, FK coilovers and GTA anti roll bars and it's got GTA headlights with aftermarket HID's.

S reg, mileage is unknown. Think Mike's after 1500 for it but will probably accept less.


Pics below are from when I was selling it Oct 2009.







 
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Cheers for that Chris.

Well worth consideration by the sound of it
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Yeah, it was a right giggle, Sounded ace and would definately give a GTA a run for it's money - oodles of torque. I think it made 240bhp on a rolling road. Oh, because you don't need to rev it as hard as a 2.5, I found it was better on fuel too.

I've got the seller on Facebook, I've asked him for his mob no. I'll drop you a PM if he gets back to me.
 
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Your a star Chris.

Now time for me to get my act together (Mummy can ya.... lol @ 38 )
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It seems I can't send you a private message but, Mike the current owner can be contacted on 07545 341 988.
 
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