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PostPosted: Wed Apr 25, 2018 9:44 am 
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Thx and that's a great reading for a 351C.

coupe3w wrote:
Sonic test. Unfortunately the machine shop only did the major and minor thrust. They were suppose to do all sides but for some reason they didn't. I sent the block to Brent and he checked the other sides when he got it. Brent said the thinnest reading he got was .130.


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PostPosted: Wed Apr 25, 2018 10:16 am 
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Location: Massachusetts
[quote="machoneman"]Thx and that's a great reading for a 351C.

You're welcome.
The engine came out of a 73 Cougar XR7. I heard roomers that the Mercury cars got the better parts. But I doubt Ford cast the engine blocks any differently for Mercury. I think I just got lucky and got a good one. :mrgreen:


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PostPosted: Fri Apr 27, 2018 6:36 pm 
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Heads are done, but I don't think I'll get them assembled this weekend.

Spent all day today installing a new dryer vent and repairing some water damage between our house and our deck. Fun stuff. Wish I could have been turning a torque wrench.

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PostPosted: Fri May 04, 2018 10:34 am 
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Heads are done. :)

Image

Image

Washed your rocker studs and guide plates and went to install those, but for some reason the studs would get about 1-2 threads in and then tighten up. I tried an ARP stud I had here and it threaded right in.....????? I ordered you a new set of studs.

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PostPosted: Fri May 04, 2018 12:10 pm 
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Looking good Brent. No clue why the studs wouldn't thread in. They came out of my stock heads no problem. Oh well progress is progress!


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PostPosted: Sat May 05, 2018 9:52 am 
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Build looking awesome. Gonna make some power. Really impressed with that wall thickness. Brent, with those numbers, how far could you overbore and still have adequate wall thickness?.

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PostPosted: Sat May 05, 2018 12:15 pm 
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I typically don’t like to bore more than I have to, and in this case, the block will just get honed until the cylinders are straight and round. Hopefully just a few thou.

But to answer your question, most C blocks I see have .090-.100 (and even less) wall thickness when they’re standard bore and seem to do fine. I would rather have cylinders that don’t flex if given the choice though.

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PostPosted: Sun May 06, 2018 9:36 am 
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I know what your saying, but with those numbers, could you go .060, and still have enough meat?

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PostPosted: Sun May 06, 2018 1:14 pm 
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Yeah, it should be ok there.

What you have to watch out for on older blocks is if they have any pitting on the back sides of the cylinders. You can't really sonic every square inch of the cylinder and there can often be some thin spots that will ruin your day...

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PostPosted: Sun May 06, 2018 5:09 pm 
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I agree, I have seen the pitting, I know what you mean. Popular bores for pro stock were ..060/080, seen blocks go out that far, big time valve unshrouding. Roll the dice, gets weak, pick another block. A few Aussies do it too.

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