My New Block

[2006wrxtr]

for those who doubted I have a boss block

http://i163.photobucket.com/albums/t297/mike93lx/DSCN0156.jpg
http://i163.photobucket.com/albums/t297/mike93lx/DSCN0155.jpg
http://i163.photobucket.com/albums/t297/mike93lx/DSCN0158.jpg
http://i163.photobucket.com/albums/t297/mike93lx/DSCN0161.jpg

Rotating assembly I got for Xmas

http://i163.photobucket.com/albums/t297/mike93lx/DSCN0031.jpg

[badass88gt]

Level 20, hmmm. How much extra did they rape you for that?

Wow, those cylinders are short. I never seen one up close like that, Ive heard that is the big problem with those blocks.

Looks good, should be the last block you ever buy. What combo are you going with? Why did you choose the Boss over a Dart?

[sloLs1]

staying with a small inch small block??? stroker???


and that block is beefy!

[badass88gt]

stroker???


I hope its staying 3.25" stroke or less or there will be problems.

[2006wrxtr]

Level 20, hmmm. How much extra did they rape you for that?

Wow, those cylinders are short. I never seen one up close like that, Ive heard that is the big problem with those blocks.

Looks good, should be the last block you ever buy. What combo are you going with? Why did you choose the Boss over a Dart?


Wanted to stay with Ford that's why I got the Boss. I am running a 347.
4340 Crank, H beams, and Probe PRS pistons.

If I did it over I would probably get the Dart and build a 427na to get all the power I will need for the street.

Twsit wedge heads ported by T.P.S., Anderson B-31 cam, Strim with 8" lower and 3.0 Upper....

[2006wrxtr]

I hope its staying 3.25" stroke or less or there will be problems.


can be bored to 4.125 and stroke of 3.4 for a 363. A guy I know has pretty much the same combo as me and there are no problems..

[badass88gt]

Best of luck to you. A little more research may have saved you some major headaches by using the 3.4" stroke on a Boss block. The cylinders are just too short for it to be done properly. ESPECIALLY with a power adder. To do it properly on that block with that stroke it needs a custom piston. It will have EXCESSIVE piston rocking with only having only 1/2" of skirt still up in the cylinder at BDC. Some skirts have less curve or taper to them and will not have as much rock as others but there aren't really any skirts that are happy with this little support at BDC. You also need a very smooth radius at the bottom of the bores too so you don't chew off the skirts from the contact with that super sharp edge after honing while all that rock over is taking place as well at BDC. Chances are you will have issues with oil consumption due to this.

I really hope you dont have problems with it, hate to be the bearer of bad news.

[2006wrxtr]

if I listened to every bad thing someone tells me about on combo or another I wouldn't have any type of engine or car. I hear bad things about just about everything.

[badass88gt]

Like I said, not trying to be a prick, I really hope it works. This information comes from some of the top engine builders in the country.

See for yourself...FYI, Mark O'Neal on HC50 happens to be the guy that made your pistons, make note of his comments.

http://bbs.hardcore50.com/vbulletin/showthread.php?t=45159

http://bbs.hardcore50.com/vbulletin/showthread.php?t=44814&highlight=dss

[Reverend Cooper]

looks like the boss might be the wrong choice for a 347 build thats for sure.

[HY35F2T]

thats some sexy metal,*cough*306/gt47r*cough*

[Syclone0044]

Looks like a beastly block! :thumbsup

I don't know about the main bolts though, looks like hardware store stuff?? Never seen main bolts like that at any rate.

[badvenom]

looks like the boss might be the wrong choice for a 347 build thats for sure.

why is that ????

[badass88gt]

Read what I wrote about the shorter cylinders.

[2006wrxtr]

I did a bit more research. And I am sure that if there were major problems Roush wouldn't be building 347's with this block. Also the race shop that is putting the car together has built a few of these combo's and no problems.

I did call DSS to get thier opinion and they assured me they haven't had any problems with te ones they have built and sold.

[badass88gt]

Cool. Like I said, hope it works out.

According to Roush's website they dont use FRPP blocks.

[CobraSnake]

I did a bit more research. And I am sure that if there were major problems Roush wouldn't be building 347's with this block. Also the race shop that is putting the car together has built a few of these combo's and no problems.

I did call DSS to get thier opinion and they assured me they haven't had any problems with te ones they have built and sold.

wow he owned joo 88!!!

[badass88gt]

How's that? Roush is using Dart blocks (Click here (http://www.roushperformance.com/engines/engines.shtml) to see the Roush small blocks) and DSS is one of the biggest jokes in the small block Ford world. I dont see where he "owned" me? I'm just trying to save the guy some potential headache by giving him fact to base his decisions off of, especially because if he didnt know this stuff, its not too late for him to make changes.

[Reverend Cooper]

Roush is not using boss blocks at this time. badass powned all

[badass88gt]

Not looking to "own" anyone. Just trying to help.

[2006wrxtr]

My mistake on the Roush bit. Ford gives thier 347 Boss assembly a 12mnth/12000 mile warranty. I also hope for no problems; guess we will see.
I had a well known local machine shop do the assembly. They do all the work for outlaw performance who is the shop who will be helping me finish the build. If they would have seen any problems I would have been notified.
But I guess there can be problems with most any combination it is all give and take. With my B31 cam the motor won't see more than 6500rpm so it should live a good long time.

Thaks for the input gives me a little more to think about..

[2006wrxtr]

Also I have the 5.315 rods wich I believe are used to help with some of the problems that you have mentioned.