Hardblock?

richie 2 · 06-05-2017, 08:00 PM

I have a set of S/S 350ci chevy pistons + .060''....should I hardblock fill my 010 block to support that large an oversize? wondering about the extra weight too...tks.

Tim H · 06-05-2017, 08:34 PM

Most replies are going to favor the hardblock procedure.

HP HUNTER · 06-05-2017, 09:12 PM

Quote:

Originally Posted by richie 2

I have a set of S/S 350ci chevy pistons + .060''....should I hardblock fill my 010 block to support that large an oversize? wondering about the extra weight too...tks.

Yes

Alan Roehrich · 06-05-2017, 09:17 PM

Absolutely. In fact, you should probably have it thoroughly sonic tested. The majority of those blocks are really marginal at that over size.

richie 2 · 06-05-2017, 11:15 PM

alan even if its thin, would the filler not still support it? so the thicker the better...fill the thickest one?

carl hinkson · 06-06-2017, 05:47 AM

Sonic test first and at that bore plate honing is a must to achieve good ring seal.

Personally i don't find many OEM blocks that would be a good build at .060 over. Like I said sonic test first.

James L Miller · 06-06-2017, 12:06 PM

Do you use a half fill or a full fill? Do you put a gasket and head on after filling that side of the block so the bores are distorted in the same way as when running? I was thinking of buying the full fill Hard-Blok and then using half in my 273 Mopar block (and 1/2 of that on each side). I've never used this before, but the cylinder walls on the 273 blocks are under .200" thick, some down around .130" with a standard bore. The cylinder walls tend to be thinner in the middle and the front and rear areas between the cylinders.

06-05-2017, 08:00 PM	#1
richie 2 Senior Member Join Date: Feb 2009 Posts: 967 Likes: 419 Liked 200 Times in 91 Posts	Hardblock? I have a set of S/S 350ci chevy pistons + .060''....should I hardblock fill my 010 block to support that large an oversize? wondering about the extra weight too...tks. Last edited by richie 2; 06-05-2017 at 08:17 PM.

06-05-2017, 08:34 PM	#2
Tim H VIP Member Join Date: Jan 2007 Posts: 1,040 Likes: 1,068 Liked 481 Times in 158 Posts	Re: Hardblock? Most replies are going to favor the hardblock procedure.

06-05-2017, 09:17 PM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,104 Likes: 1,560 Liked 1,784 Times in 407 Posts	Re: Hardblock? Absolutely. In fact, you should probably have it thoroughly sonic tested. The majority of those blocks are really marginal at that over size. __________________ Alan Roehrich 212A G/S

06-05-2017, 11:15 PM	#5
richie 2 Senior Member Join Date: Feb 2009 Posts: 967 Likes: 419 Liked 200 Times in 91 Posts	Re: Hardblock? alan even if its thin, would the filler not still support it? so the thicker the better...fill the thickest one? Last edited by richie 2; 06-05-2017 at 11:18 PM.

06-06-2017, 05:47 AM	#6
carl hinkson Member Join Date: Feb 2007 Location: NORTHEAST Posts: 287 Likes: 1 Liked 18 Times in 10 Posts	Re: Hardblock? Sonic test first and at that bore plate honing is a must to achieve good ring seal. Personally i don't find many OEM blocks that would be a good build at .060 over. Like I said sonic test first.

06-06-2017, 12:06 PM	#7
James L Miller Member Join Date: Apr 2005 Posts: 494 Likes: 6 Liked 25 Times in 16 Posts	Re: Hardblock? Do you use a half fill or a full fill? Do you put a gasket and head on after filling that side of the block so the bores are distorted in the same way as when running? I was thinking of buying the full fill Hard-Blok and then using half in my 273 Mopar block (and 1/2 of that on each side). I've never used this before, but the cylinder walls on the 273 blocks are under .200" thick, some down around .130" with a standard bore. The cylinder walls tend to be thinner in the middle and the front and rear areas between the cylinders. __________________ Mopar 2 Ya! Last edited by James L Miller; 06-06-2017 at 12:24 PM. Reason: More info added.