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EF XR8- 28oz or 50oz 

 

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 Post subject: EF XR8- 28oz or 50oz
Posted: Mon Feb 21, 2011 1:06 pm 
Oompa Loompa
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Hi,

Im looking at a 347 stroker short block and i was wondering what external balanced oz i need for my ef xr8.
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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Mon Feb 21, 2011 2:38 pm 
Getting Side Ways
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The 5.0 is a 50oz external balance, and the 351W roller is a 28oz.

Your kit should specify what balance you need. If changing to a 28oz then i would suggest getting the entire rotataing assemble (balancer/crank/rods/pistons and flexplate/flywheel) all balanced as a matched set. Any good machine shop should be able to do this for your and your should see change from 500 for that.
Cheers
Brett

 

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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Mon Feb 21, 2011 2:52 pm 
Oompa Loompa
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The short motor im looking at says its 28oz externally balanced assembly. Im not sure if its is fully balanced or what the go is. I have never brought a short motor like this before.
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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Mon Feb 21, 2011 4:12 pm 
EFI Guru
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xr8boi wrote:
The short motor im looking at says its 28oz externally balanced assembly. Im not sure if its is fully balanced or what the go is. I have never brought a short motor like this before.


Ask them? If it's new it's likely had a proper balance with a 28oz flywheel and 28oz balancer in place. Ask them what tolerance it was balanced to?
Personally I'd prefer to buy the engine with these components still attached...that way you know it's a complete balanced assembly.
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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Mon Feb 21, 2011 4:20 pm 
Oompa Loompa
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It is brand new. Its from Engine Masters Australia. Its a dart block.

http://cgi.ebay.com.au/ws/eBayISAPI.dll ... TQ:AU:1123

This is the assembly
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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Mon Feb 21, 2011 4:26 pm 
EFI Guru
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xr8boi wrote:
It is brand new. Its from Engine Masters Australia. Its a dart block.

http://cgi.ebay.com.au/ws/eBayISAPI.dll ... TQ:AU:1123

This is the assembly


Ok email them.
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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Mon Feb 21, 2011 4:30 pm 
Oompa Loompa
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Ride: 1994 EF XR8

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Just emailed them so hopefully i will have an answer about it soon.

Thanks for your help
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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Mon Feb 21, 2011 7:52 pm 
Oompa Loompa
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Got an email back it doesnt come with fly wheel or balancer and they say it has a tolerance of about 0.5oz
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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Mon Feb 21, 2011 9:44 pm 
Getting Side Ways
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It's NOT balanced then !!!

It's the counterweight of the crank that determines what balance it has....
28 is better than 50... 50 are all roller motors or EFI in Aust...
Most stroker crank assemblies can be neutral balanced too..

 

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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Mon Feb 21, 2011 10:56 pm 
Oompa Loompa
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Im chasing the engine fro my ef xr8 can i still use this short block or im i better just buying a dart block and a stroker kit and doing it myself
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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Tue Feb 22, 2011 2:10 pm 
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Actually it is balanced and the tolerance 1/2oz. This is about as good as you can hope for with a new engine that is not supplied with flywheel or balancer.
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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Tue Feb 22, 2011 3:28 pm 
Getting Side Ways
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For the price he is asking u could get somone like keith craft to build it and send it over.............

http://www.keithcraft.com/

 

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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Wed Feb 23, 2011 12:34 am 
Oompa Loompa
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Yeah but this is a DART block assembly built by DART. This place is just a reseller of them the cost of it plus freight from USA would work out roughly the same as the price from the place.
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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Wed Feb 23, 2011 12:40 am 
Getting Side Ways
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MICKYYYY wrote:
For the price he is asking u could get somone like keith craft to build it and send it over.............

http://www.keithcraft.com/

Beat $5700 AU for a Dart block 347? I think NOT!!!!!!!!!!!

 

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 Post subject: Re: EF XR8- 28oz or 50oz
Posted: Wed Feb 23, 2011 1:04 am 
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67RCE wrote:
MICKYYYY wrote:
For the price he is asking u could get somone like keith craft to build it and send it over.............

http://www.keithcraft.com/

Beat $5700 AU for a Dart block 347? I think NOT!!!!!!!!!!!


Why not?...email them too!
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