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New 351W block to watch out for 

 

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 Post subject: New 351W block to watch out for
Posted: Thu Sep 02, 2010 9:01 am 
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It seems Pro Comp has started casting cylinder blocks. This listing popped up on the local auction site. I wonder who's casting design they ripped off this time. Just more chinese rubbish to avoid, but I'm sure there will be some buyers willing to take the risk for what seems like a "bargain". Except when it fails catastrophically and takes out the rest of the engine.... Buyer beware.

http://www.trademe.co.nz/Trade-Me-Motor ... 917763.htm

 

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 Post subject: Re: New 351W block to watch out for
Posted: Thu Sep 02, 2010 9:32 am 
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The main caps look like Dart, so they probably just copied a Dart block.
The price isnt too good, a genuine dart block is only $3000 or so.....

Just another reason to stay the hell away from Pro Comp / Sydney Speed Supplies / AT Racing, or whatever else they start calling themselves. :roll:

 

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 Post subject: Re: New 351W block to watch out for
Posted: Thu Sep 02, 2010 12:33 pm 
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Ive read about these block and they are weaker than factory produced block, ill find the thread and post it here.

 

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 Post subject: Re: New 351W block to watch out for
Posted: Thu Sep 02, 2010 4:37 pm 
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Remember the price is in NZ$. FYI the price is about $1k under normal retail for a Motorsport or World Products block, but only a few hundred below "trade" price which most people get by asking nicely.

That article sounds like an interesting read.

 

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 Post subject: Re: New 351W block to watch out for
Posted: Thu Sep 02, 2010 9:51 pm 
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Hahaha! Im reading a recent Steet Fords mag. Pavtek have got Dart Sportsman blocks for a whole $57 more.

 

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 Post subject: Re: New 351W block to watch out for
Posted: Fri Sep 03, 2010 9:12 am 
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http://www.yellowbullet.com/forum/showt ... comp+block

http://www.yellowbullet.com/forum/showt ... comp+block

 

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 Post subject: Re: New 351W block to watch out for
Posted: Fri Sep 03, 2010 1:03 pm 
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Crane wrote:
Hahaha! Im reading a recent Steet Fords mag. Pavtek have got Dart Sportsman blocks for a whole $57 more.


Is that for a tall deck 351W block or short deck 302W block.

Copying the moulds is one thing. But using the right material and fine tuning the process is another thing altogether and that's where most of the defects are. You can have material as thick as you want but if its porous or a substandard grade of metal then it will ultimately fail.
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 Post subject: Re: New 351W block to watch out for
Posted: Fri Sep 03, 2010 5:22 pm 
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xcabbi wrote:
Is that for a tall deck 351W block or short deck 302W block.


Both were the same price. The mag was #71. Very recent.

 

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 Post subject: Re: New 351W block to watch out for
Posted: Tue Sep 07, 2010 1:25 am 
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Also...the ad states its a Windsor block with Clevo mains.....what the point????
W had bigger mains than Clevo!!!

 

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 Post subject: Re: New 351W block to watch out for
Posted: Tue Sep 07, 2010 1:37 am 
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That other thread is an interesting read. One that i must say doesn't surprise me too much at all.

Cheers

ToranaGuy

 

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 Post subject: Re: New 351W block to watch out for
Posted: Tue Sep 07, 2010 8:08 am 
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cjh wrote:
Also...the ad states its a Windsor block with Clevo mains.....what the point????
W had bigger mains than Clevo!!!


The point is lower bearing surface velocity, which reduces oil temps. It also has something to do with maintaining an oil film. Once a certain velocity is reached the oil doesn't work properly any more and the engine is more prone to journal damage. Reducing the diameter of the journal decreases the surface velocity by about 10%. It's quite common

The block is still rubbish I wouldn't touch.

 

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