SS chevy cylinder blocks

richie 2 · 04-02-2019, 08:29 AM

does anyone use a +.060'' factory block? newbe trying to keep my shortblock cost down...i have old school duffy/trw type pistons, not sure if they would survive todays 8500 rpm type enviorment... any opinions/experiances please

Mike Pearson · 04-02-2019, 08:55 AM

Quote:

Originally Posted by richie 2

does anyone use a +.060'' factory block? newbe trying to keep my shortblock cost down...i have old school duffy/trw type pistons, not sure if they would survive todays 8500 rpm type enviorment... any opinions/experiances please

It’s a crap shoot with the factory blocks at .060 over. You would be better off saving for an aftermarket block. The prep cost is the same and you know you will have something good. The Duffy’s will hold up fine at that rpm. I used to run those years ago and never had one fail. Stick car and over 9000 rpm.

carl hinkson · 04-02-2019, 02:42 PM

Quote:

Originally Posted by richie 2

does anyone use a +.060'' factory block? newbe trying to keep my shortblock cost down...i have old school duffy/trw type pistons, not sure if they would survive todays 8500 rpm type enviorment... any opinions/experiances please

I sonic test every OEM block and find very few that I would use at .060 over in a performance build.

Adger Smith · 04-07-2019, 02:31 AM

Get some better pins for the Duffy's pistons. They fail before the piston.

richie 2 · 04-07-2019, 03:19 AM

thankyou gentlemen for your input....i had a .060 over unit fill one cylinder with water, it wase'nt a season old...

jon jamison · 04-07-2019, 09:25 AM

Hi Richie,
I have 2 721 Nova blocks and 3 194 Nova blocks (1 is new counter exchange) most have been sonic tested. All 283 bore some over size. As you probably know they have thicker cylinder walls and a higher nickel content, nodular caps. The nice thing about them they weigh about 150 lbs. 712 363 3801 I also have 2 complete take out Nova engines.

Ed Wright · 04-07-2019, 12:18 PM

GM has a Bow Tie block with 283" size mains now. Very thick cylinder walls, great for ring seal. Deck thick enough to build a "short deck" if you want. 4 bolt mains, etc. Nice piece, imho.

richie 2 · 04-07-2019, 02:45 PM

ed is it 4'' bore able to go .060" ... can i get a part number by chance?

Ed Wright · 04-07-2019, 06:01 PM

Quote:

Originally Posted by richie 2

ed is it 4'' bore able to go .060" ... can i get a part number by chance?

It will go +.125" if you want. Had mine well over a year. Don't know if my wife could find the invoice. Might google it.

04-02-2019, 08:29 AM	#1
richie 2 Senior Member Join Date: Feb 2009 Posts: 965 Likes: 415 Liked 200 Times in 91 Posts	SS chevy cylinder blocks does anyone use a +.060'' factory block? newbe trying to keep my shortblock cost down...i have old school duffy/trw type pistons, not sure if they would survive todays 8500 rpm type enviorment... any opinions/experiances please Last edited by richie 2; 04-02-2019 at 08:41 AM.

04-07-2019, 02:31 AM	#4
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: SS chevy cylinder blocks Get some better pins for the Duffy's pistons. They fail before the piston. __________________ Adger Smith (Former SS)

04-07-2019, 03:19 AM	#5
richie 2 Senior Member Join Date: Feb 2009 Posts: 965 Likes: 415 Liked 200 Times in 91 Posts	Re: SS chevy cylinder blocks thankyou gentlemen for your input....i had a .060 over unit fill one cylinder with water, it wase'nt a season old...

04-07-2019, 09:25 AM	#6
jon jamison Junior Member Join Date: Aug 2009 Posts: 10 Likes: 1 Liked 0 Times in 0 Posts	Re: SS chevy cylinder blocks Hi Richie, I have 2 721 Nova blocks and 3 194 Nova blocks (1 is new counter exchange) most have been sonic tested. All 283 bore some over size. As you probably know they have thicker cylinder walls and a higher nickel content, nodular caps. The nice thing about them they weigh about 150 lbs. 712 363 3801 I also have 2 complete take out Nova engines. Last edited by jon jamison; 04-07-2019 at 09:29 AM. Reason: spell correct

04-07-2019, 12:18 PM	#7
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: SS chevy cylinder blocks GM has a Bow Tie block with 283" size mains now. Very thick cylinder walls, great for ring seal. Deck thick enough to build a "short deck" if you want. 4 bolt mains, etc. Nice piece, imho. __________________ Ed Wright 4156 SS/JA

04-07-2019, 02:45 PM	#8
richie 2 Senior Member Join Date: Feb 2009 Posts: 965 Likes: 415 Liked 200 Times in 91 Posts	Re: SS chevy cylinder blocks ed is it 4'' bore able to go .060" ... can i get a part number by chance?