289 better than 302 block for 331 build?

BlueOval Ralph · 06-14-2012, 08:47 AM

When you build 302 stroke combos Piston skirt design in VERY important, the more stroke the more important it becomes! It may not affect durability but it in the area of piston stability and ring seal.

Jesse Kershaw · 06-14-2012, 10:54 AM

SSDiv6,

We discontinued to R302 because it was replaced by the Boss block which we believe is better in every way. The iron is better, core shift is essentially non-existent, oiling and cooling is revised and improved, cost came down, etc.

The R302 tooling as I recall was getting old and we sold the last of our production blocks and Sportsman blocks. The Boss 302 was designed to replace both our race block and the Sportsman. For us to have rehab'd the R302 tooling would have been an inferior block for more money.

In regards to other posts I agree that piston skirts can make a big difference. We use Mahle pistons and have had great results.

SSDiv6 · 06-15-2012, 03:17 PM

Quote:

Originally Posted by Jesse Kershaw

SSDiv6,

We discontinued to R302 because it was replaced by the Boss block which we believe is better in every way. The iron is better, core shift is essentially non-existent, oiling and cooling is revised and improved, cost came down, etc.

The R302 tooling as I recall was getting old and we sold the last of our production blocks and Sportsman blocks. The Boss 302 was designed to replace both our race block and the Sportsman. For us to have rehab'd the R302 tooling would have been an inferior block for more money.

In regards to other posts I agree that piston skirts can make a big difference. We use Mahle pistons and have had great results.

Thank you for the explanation Jesse.
By the way, is there a way I can obtain a copy of the instruction sheet for the M-6010-R302 block?
I own two R302 blocks, however, I do not have the instruction sheet that contained all the particulars about the block, including the toque values for the fasteners.

rawhide · 06-15-2012, 03:27 PM

The instruction sheet for the R302 is a one page deal and is not available on the Ford Racing website. If you have a fax send me the number and I will send it to you. I would scan it if I knew how but my knowledge of computers is on-off-porn
regards

SSDiv6 · 06-15-2012, 08:11 PM

Quote:

Originally Posted by rawhide

The instruction sheet for the R302 is a one page deal and is not available on the Ford Racing website. If you have a fax send me the number and I will send it to you. I would scan it if I knew how but my knowledge of computers is on-off-porn
regards

Thank you Rawhide. I will PM you my office fax number on Monday; I appreciate your assistance on this subject.

SSDiv6 · 06-18-2012, 06:47 PM

Quote:

Originally Posted by rawhide

The instruction sheet for the R302 is a one page deal and is not available on the Ford Racing website. If you have a fax send me the number and I will send it to you. I would scan it if I knew how but my knowledge of computers is on-off-porn
regards

Rawhide, check your PM.

SSDiv6 · 06-21-2012, 07:11 PM

Rawhide, thank you for the fax!

06-14-2012, 08:47 AM	#1
BlueOval Ralph Banned Join Date: Feb 2008 Posts: 852 Likes: 0 Liked 0 Times in 0 Posts	Re: 289 better than 302 block for 331 build? When you build 302 stroke combos Piston skirt design in VERY important, the more stroke the more important it becomes! It may not affect durability but it in the area of piston stability and ring seal. Last edited by BlueOval Ralph; 06-14-2012 at 08:49 AM.

06-14-2012, 10:54 AM	#2
Jesse Kershaw Member Join Date: Apr 2009 Posts: 108 Likes: 6 Liked 122 Times in 11 Posts	Re: 289 better than 302 block for 331 build? SSDiv6, We discontinued to R302 because it was replaced by the Boss block which we believe is better in every way. The iron is better, core shift is essentially non-existent, oiling and cooling is revised and improved, cost came down, etc. The R302 tooling as I recall was getting old and we sold the last of our production blocks and Sportsman blocks. The Boss 302 was designed to replace both our race block and the Sportsman. For us to have rehab'd the R302 tooling would have been an inferior block for more money. In regards to other posts I agree that piston skirts can make a big difference. We use Mahle pistons and have had great results. __________________ Jesse Kershaw

06-15-2012, 03:27 PM	#4
rawhide Member Join Date: Feb 2010 Posts: 270 Likes: 1 Liked 7 Times in 5 Posts	Re: 289 better than 302 block for 331 build? The instruction sheet for the R302 is a one page deal and is not available on the Ford Racing website. If you have a fax send me the number and I will send it to you. I would scan it if I knew how but my knowledge of computers is on-off-porn regards

06-21-2012, 07:11 PM	#7
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,045 Likes: 712 Liked 1,604 Times in 583 Posts	Re: 289 better than 302 block for 331 build? Rawhide, thank you for the fax!