ok im doin the h23 vtec. Im putting im h23 rods on h22 pistons.......i hear they need to be shot peened....anyone want to explain or have b 4 and after pics to show the difference?

 

Basically put it in a machine that shoots tons of little BBs at it to strengthen the surface of the object....helps a lot with cracking and such as I understand it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hawkze_2.3 &raquo;</TD></TR><TR><TD CLASS="quote">Basically put it in a machine that shoots tons of little BBs at it to strengthen the surface of the object....helps a lot with cracking and such as I understand it.</TD></TR></TABLE>

just makes used rods stronger

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by E-Money &raquo;</TD></TR><TR><TD CLASS="quote">

just makes used rods stronger</TD></TR></TABLE>

that is not nearly the only use for shot peening a metal

it basically slams all the internal imperfections out of the object

 

Like drop forging?

 

another good way to go, as i understand it shot peening can leave most metal brittle. however a wpc treatment does not, uses ceramic rather then glass bb's and in some cases tin and other materials can be used to impregnate the object with a certain amount of lubrication. check it out. http://www.wpctreatment.com/technical.htm

 

If your talking about something that strictly strengthens metal you can also try that cryo treatment.

 

Shot peening is a method of work hardening and adding compressive stress to the surface of a metal. This gives the part greater fatigue strength, because the resulting compressive stress at the surface helps to keep surface imperfections and cracks from opening further and propagating through the part with repeated stress cycles. The idea is similar to how tempered glass works to prevent surface cracks from spreading. Most connecting rods in modern engines get this treatment from the factory because connecting rods face a difficult fatigue environment due to the fact that they see many cycles of both tension and compression. Compare this to a rod bolt which should only see varrying degrees of tension.

http://en.wikipedia.org/wiki/Peening

http://en.wikipedia.org/wiki/P..._Drop

 

anyone got before and after pictures of shotpeened rods?

 

how about a laser peen?? (insert toolman grunt here)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bb4ever &raquo;</TD></TR><TR><TD CLASS="quote">how about a laser peen?? (insert toolman grunt here)</TD></TR></TABLE>

How is a laser going to make compressive indentations on the surface? All it would do is erode material.

 

^^A laser can do crazy things. IE: Rapid prototyping. But I've never heard of laser peening.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by red92s &raquo;</TD></TR><TR><TD CLASS="quote">How is a laser going to make compressive indentations on the surface? All it would do is erode material.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Televator &raquo;</TD></TR><TR><TD CLASS="quote">^^A laser can do crazy things. IE: Rapid prototyping. But I've never heard of laser peening.</TD></TR></TABLE>

I guess the toolman grunt didn't give away bb4ever's intention to clearly....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B.Rabbit &raquo;</TD></TR><TR><TD CLASS="quote">anyone got before and after pictures of shotpeened rods?</TD></TR></TABLE>

You can't really tell a difference whether it be a rod, wheel etc. whatever is being shot peened. Like don't expect to see a bunch of lil bb indentations and stuff. It still looks normal.

 

^^Whether or not people actually do it though, don't be surprised if it's actually possible...I'm telling you lasers are so multi-capable...it's actually not out of it's range - I would think.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by red92s &raquo;</TD></TR><TR><TD CLASS="quote">

How is a laser going to make compressive indentations on the surface? All it would do is erode material.</TD></TR></TABLE>

Haha it is funny to me how much of a misconception that most people have about lasers.

Do a quick google on it...heres a good site

http://www.metalimprovement.com/laser_peening.php

wikipedia ftw

 

Leave it to you to put a seemingly crazy idea on solid ground as a valid fact. I wonder how many people also thought "teh lazor = OMFG explosions!" Using water as a sort of environmnetal constant or catalyst of sorts lasers have also been used in making test parts out of plastic beads or powder. I think given our current abilities with them, lasers are actually more practically suited for creation/manufacturing rather than destruction.

 

If you had your rods shot peened, you will most likely have a couple tiny BBs stuck between the rod and the bolt head area. I had this done on 4 occasions and had always been the same.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Televator &raquo;</TD></TR><TR><TD CLASS="quote">Leave it to you to put a seemingly crazy idea on solid ground as a valid fact. I wonder how many people also thought "teh lazor = OMFG explosions!" Using water as a sort of environmnetal constant or catalyst of sorts lasers have also been used in making test parts out of plastic beads or powder. I think given our current abilities with them, lasers are actually more practically suited for creation/manufacturing rather than destruction.</TD></TR></TABLE>

Lol, no kidding. Lasers are quite useful, much more than for just cutting and shooting guns.

Higher frequency RF signals are much more suited to destroy things than most lasers as we know them. There is a machine in use by the military right now that can inflict pain on you with a beam of energy...from hundreds of feet away....that is kinda scary.....