Balancer shaft delete = 10 bhp

[2-20]

If the neutral shafts really provide 10 HP as stated by GM on this document:
http://www.gmperformancedivision.com/co ... Part_2.pdf
Then $ 400 is not much money for something that remains reversible to stock. And you dont have to block the oilways or to be concerned by wear issues.

 

[vocky]

If the neutral shafts really provide 10 HP as stated by GM on this document:
http://www.gmperformancedivision.com/co ... Part_2.pdf
Then $ 400 is not much money for something that remains reversible to stock. And you dont have to block the oilways or to be concerned by wear issues.

that's good to know GM claim 10bhp from replacing the balancer shafts

edit: moved to tuning section

 

[Jamee]

whats a balancer shaft?

 

[Daz]

 

[vocky]

they are 4kg of scrap metal

and they rob at least 10 bhp from the engines power :roll:

 

[slindborg]

yeah ok they require some power to rotate them, but how the funk can they require 10bhp to spin up? they have to be mounted in THE most lossy bearings/chain run ever lol

ok transient speed changes will be faster as there is less mass to accelerate up much like fitting a light flywheel..

 

[Jamee]

So can i remove mine then?

 

[2-20]

yeah ok they require some power to rotate them, but how the funk can they require 10bhp to spin up? they have to be mounted in THE most lossy bearings/chain run ever lol

ok transient speed changes will be faster as there is less mass to accelerate up much like fitting a light flywheel..

The problem is that the mass of the stock balance shafts is offset and it is very different (even at constant speed) than when mass is centered as on the neutral balance shafts.
Put a bent drill bit on your drill and you will understand.

 

[vocky]

it's like having one side of a wheel full of balance weights, they are seriously imbalanced

at least General Motors would have tested the neutral balancer shafts on a dyno, so the info is 100% correct

all we need to know now is how much the 'balancer delete' gives dunno..

the usa guys state 15 hp, but I've not seen any dyno info notsure.gif

 

[K70 RAF]

I feel a how to is needed

 

[alanoo]

I feel a how to is needed

1. Remove
2. Cut
3. Refit


cheers..

 

[vocky]

I feel a how to is needed

1. Remove
2. Cut
3. Refit


cheers..

straight to the point

 

[slimvince]

I feel a how to is needed

1. Remove
2. Cut
3. Refit


cheers..

straight to the point

Don't forget to stop the oil feed for the balance shaft bearings (as Vocky and others have described). btw - will soon remove the bearings to be replaced with something that will cover the oil feed holes - did not quite get it - if you drift them out, from where will you be able to squash them and then pic them out?

 

[vocky]

it's easiest to simply knock them 7.5mm further into the block

otherwise it's hard work to get them out

 

[slimvince]

it's easiest to simply knock them 7.5mm further into the block

otherwise it's hard work to get them out

Of course - that is what I'll do! Won't require any kits or other parts to buy either!

 

[K70 RAF]

Is starting not to sound as simple as remove, cut refit! And not everyone knows what they are doing!

 

[vocky]

there is a long (ish) how 2

https://z22se.co.uk/threads/removing-balance-shafts.5895/

edit: changed link

 

[ufods]

there is a long (ish) how 2
https://z22se.co.uk/threads/removing-balance-shafts.5895/

Hey!

where can i find the link to the how to balance shaft delete?

This link is dead

Thanks, Christian.

 

[evocarlos]

its no far on from that post
https://z22se.co.uk/threads/project...poly-bushs-astra-g.22133/page-30#post-1202098

 

[Matt]

Hey!

where can i find the link to the how to balance shaft delete?

This link is dead

Thanks, Christian.

This is the link to that specific thread @vocky mentioned: https://z22se.co.uk/threads/removing-balance-shafts.5895/