USMCrebel

well im going to just get a complete rebuild kit and trust the rods, being that they are strong enough, and it has been rebuilt before. (like 10k miles agao).
what is involved in shot peening?

Hamutoff

I believe that would you polish them first then shot peen...
you would get a drum sanding machine or similar, polish the rough spots off, (casting flash etc) then - basically sand blast the rods (protecting the bearing surfaces) with hard metal ***** (less than BB size but larger than sand-blasting sand), these impact the surface slightly depressing the metal, this new surface releives or de-stresses the metal, I dont know the details past this point sorry

USMCrebel

thanks man, i might do that.

Hamutoff

I was interested and found more info, like this impressive:

A study done through the SAE Fatigue Design and Evaluation Committee showed what shot peening can do for welds compared to welds that didn't have this operation done. The study claimed that the regular welds would fail after 250,000 cycles when welds that had been shot peened would fail after 2.5 million cycles outside the weld area. This is part of the reason why shot peening is a popular operation with Aerospace parts. However, the beneficial stresses that are put on the these parts can wear off due to higher tempretures.

Shot peening is a process used to produce a compressive residual stress layer and modify mechanical properties of metals.
-entails impacting a surface with force sufficient to create plastic deformation.
-relieve tensile stresses built up in the grinding process and replace them with beneficial compressive stresses.
-confer resistance to metal fatigue and to some forms of corrosion.

USMCrebel

do you have a link to that, thats impressive.

Hamutoff

sure [&:]
Peening Proves Promising Process
You'll never look at metal the same after attending shot peening training classes at an Electronics Incorporated seminar...

http://www.aviationtoday.com/am/cate...litary/63.html

white93pony

shot peening is not necessary. to answer your question they are 5.090 inches for the 302 and 5.400 inches for the 331 and 347. all i would do is install 3/8 rod bolts and get rid of the 5/16 then have them resized. after that they will hold more power than the block can support. if your planning on building an engine than also have the crank turned 10-10 and polished then add forged pistons (your factory engine has hyper) then add a good set of moly rings and bearings thats about the best you can do. the block will fail first!!! good luck!!!

USMCrebel

thanks a lot guys!

neidert

From what I have gathered from others on this site, and mechanics is that the 87-92 mustangs 5.0 have forged pistons the 93-95 have the casting crap. I was dissapionted to find that out with my 95. Was looking to supercharge, oh well. Stroker kit it is.

Hamutoff

Its possible to get a junkyard '87-92 and pull out your orig engine, wrap it up for safe keeping...?