carnut
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| posted on 10/2/05 at 04:31 PM |
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Removing balancers
Im going to remove the 2 balencers o my spare blackbird engine to remove a load of inertia. They weigh s**t loads and only a little if the weight
looks to be eccentric.
Ive heard a few peope have done this with a bird engine but does anyone know how much difference it will make?
I know the engine is likely to be a bit more vibey but im confident that if I block up the oil gallerys to the balancers i should also get a bit of
extra oil pressure which would help the blackbirds crank a bit.
Carnut
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Jon Ison
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| posted on 10/2/05 at 05:35 PM |
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i;m told it makes it rev like a 600 rather than a 1100, (faster pick up), most of the grass track lads do it, id'e love too myself but i have
too run a standard engine. It also helps with oil feed like you say to #3 this is allways the one to go and it feeds the balancer as well as the big
end.
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carnut
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| posted on 10/2/05 at 09:59 PM |
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Cheers John,
Looks lke im going to go ahead and do it.
If there anything wrong then ill just put them back in again.
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carnut
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| posted on 11/2/05 at 12:14 AM |
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How much difference does it make to acceleration?
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Hellfire
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| posted on 11/2/05 at 04:31 AM |
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Interesting...
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Bob C
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| posted on 11/2/05 at 10:18 AM |
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I'd expect it to make a considerable difference to the acceleration of the engine in neutral and a tiny amount to the acceleration of the
car!
I did the sums for a lightened flywheel and got a few percent in 0-60 time for a normal car. A lanchester shaft will have very small moment of inertia
compared to a flywheel.
Just compare the kinetic energy of the car at 60 to that of the flywheel at 6000revs.
Bob
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Jon Ison
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| posted on 11/2/05 at 11:12 AM |
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it does make then "rev up" quicker, but talking too the guys that have done it the main benifit is better oil flow to #3 rod as it is
shared with a feed too the balancer, not forgetting a fair amount of "rotating weight" loss.
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Rorty
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| posted on 13/2/05 at 03:57 AM |
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I remove the balancers from ZZR1100 engines for better oil flow and to save a heap of weight. I weld the holes up in the case, so it's not
possible to refit the balancer later, but you wouldn't really want to anyway.
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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carnut
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| posted on 13/2/05 at 01:21 PM |
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Hi Rorty,
Do you notice any difference in acceleration or even engine breaking etc?
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Rorty
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| posted on 13/2/05 at 01:35 PM |
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quote:
Originally posted by carnut
Hi Rorty,
Do you notice any difference in acceleration or even engine breaking etc?
I can't say that I have. I know in theory there is a difference, but in the real world, and certainly in a BEC, there's no noticible
difference.
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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