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A460 block questions

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crittersf1
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Post  kjett March 26th 2012, 12:01 pm

Ok, riddle me this, Batman! Looking around for a new block for a new build. Been leaning toward the a460 block and was looking through the 2012 FRPP parts book. Am I wrong in what I'm seeing that they now no longer have water passages located on the block??? Or were they always like this and I just never realized it? scratch
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Post  c.evans March 26th 2012, 12:49 pm

They are water jacketed. It says they are Siamese cylinder bores which means there is no water jacket between the cylinders, so the cylinders can be bigger in diameter.

Charlie

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Post  kjett March 26th 2012, 1:03 pm

Charlie, thanks and I knew that, just the picture doesn't show any passages to the heads. Only thing I can see is the threaded holes and the head oil return passages, or I could be looking at the picture wrong.
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Post  c.evans March 26th 2012, 2:31 pm

The picture is on the bottom right hand corner of page 93 in the 2012 catalog. Looks normal to me.

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Post  kjett March 26th 2012, 2:55 pm

ok. must be my old eyes looking at this tiny pic on my phone. Thats the page and location of the pic though. Thanks Charlie, as always, you are the man!
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Post  c.evans March 26th 2012, 8:04 pm

You are welcome and thank you sir.

Charlie

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Post  crittersf1 March 27th 2012, 8:54 am

It must be the light "gleaming" off of that bald-ass head. Razz Razz Razz
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Post  kjett March 27th 2012, 10:06 am

crittersf1 wrote:It must be the light "gleaming" off of that bald-ass head. Razz Razz Razz

Probably so. Some of us aren't that fortunate to have a head full of mullet to walk around with Very Happy
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Post  NO FAIR March 28th 2012, 9:29 pm

c.evans wrote:They are water jacketed. It says they are Siamese cylinder bores which means there is no water jacket between the cylinders, so the cylinders can be bigger in diameter.

Charlie

Ok,
I am sure this a stupid question but are the siamese bores more prone to run hot than a standard block?
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Post  rmcomprandy March 28th 2012, 9:35 pm

Probably ... if the power level is such that the standard block doesn't outright break.

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Post  Lem Evans March 28th 2012, 10:10 pm

NO FAIR wrote:
c.evans wrote:They are water jacketed. It says they are Siamese cylinder bores which means there is no water jacket between the cylinders, so the cylinders can be bigger in diameter.

Charlie

Ok,
I am sure this a stupid question but are the siamese bores more prone to run hot than a standard block?
Dave
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You'd think they would but it doesn't seem to be the case...based on what I've observed.

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Post  crittersf1 March 28th 2012, 10:19 pm

I'm hoping to find out real soon.
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Post  kjett March 28th 2012, 10:29 pm

crittersf1 wrote:I'm hoping to find out real soon.

Makes 2 of us Wink

btw, just giving you a heads up Lloys is putting his big block into his little S10 blazer to try to keep up with me. Says he might come down in June with me to run it down there as well. Long story short, tell your boys to bring their A game if y'all plan on coming up over Memorial Day weekend. You know you and the young lady that keeps you in control have a place to stay!
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Post  TorinoGT March 29th 2012, 6:08 pm

FWIW i have no heat or overheat issues running an A460 block on the street. As long as your cooling system is up to the task, there should be no obvious differences between a factory block and the A460 block in regards to heat\cooling.

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