What do you think....

[White95]

While running 10-15lbs of boost with a T70 turbo what would be the best option???

[Arctc Wolf]

how about C....bore it .010-.020 over, hone it, and cryo-treat it. cryo-treating can improve block strength up to 400%, depending on design, metal quality, ect.

[White95]

cryoing the block its self would be really expensive...oilpan4 might know how much it is exactlly...i'm looking in to cryo treating the main and and crank and possibly my already forged rods and crank, which will leave the block the weak link....all i know is that its a lot of money

[Teufel Hunden]

If you bore the block over .020 you won't have to worry about breaking the block itself. For high boost applications, you might look into getting it sonic tested, but that's about as far as you'd need to go. I've never actually heard of the block itself breaking. I've only heard of putting a rod through it.

[White95]

what exactly is sonic tested??? i plan on making serious power like in the 450+HP area and no one knows how far the 3.4L block can be pushed....

[Teufel Hunden]

The bore of the cylinders isn't the weak link in that motor. The main cap webbing is. You'll blow that stuff way before you have to worry about the block being bored .020.

Sonic testing just tells you how much material is left in the cylinder wall. Any reputable machine shop should be able to do that for you.

[oil pan 4]

The sonic testing is a nondestructive or invasive inspection used to check for cracks, fissures, inter granular corrosion, casting flaws, traped gass mainly any changes in internal metal grain structure. Old sonic testing is an ultra sound emitter hooked up to an oscilloscope.
I don't think is has changed much.
What is does is some sound bounces off the surface, most goes through it bounces the other side. That is shown on the o-scope as line that goes up and down on crossing the x-axis it is very thin even then when the metal is solid, but when you hit a crack or some thing the line breaks up or shifts around as you go over it becasue of the change of the metal structure or density.
By how the line goes up and down you can tell also how thick the metal is.
Cryo treating is around $10 a pound, could be a lot more or a little less.
Cryo treating intertwines the metal grain cristals better. You normaly have 1 plain of metal srtuctures, an alpha in most un treated metals.
But some metals like Titanium form an alpha and beta grain structures. Ti alloys can make more alpha or and less beta, or less alpha and more beta. Other metals get the second structure by heat treating, alloying or adding carbon particals.
The cryo treating bonds them better.
Where are you going to get a forged crank for the 3.4L?
I don't think cryo treating will make the block 400% stonger. some thing with a tensile strength of cast iron X 4 dosen't exist, yet.
I talk to people who work on fighter air craft, alot. That's all I did for a few hours to day.

[oil pan 4]

All most for got.
The bare cast 3.4L block weighs approximately 106lb's.
I think you can rent the tank and pay them for the LN2 and do a bulk load for several hundred dollors.
LN2 is only $4.40 a gallon and that's japinese prices, should be a lot cheaper in the U.S.
I think the 10 a pound is for the small timers with stuff like knives, pistons, saws, drill bits and bolts.
Find a company and see how much it is to rent a session and get a bunch of people together and fill up that cooler to the limit line.
I'll talk to the guys at cryo next chance I get.

[andrew.brandon]

I saw a thread a few weeks ago about the cryo stuff and somebody said that you can get the whole engine done for less than $800 if you send it all in at once I believe

[andrew.brandon]

Originally posted by Ian:
</font><blockquote>quote:</font><hr />Originally posted by Mogobs30th:
I was recommended a company that I believe was called Diversified Cyrogenics, but I do a search and I get nothing. Anyone have any ideas?

VERY good company. they also freeze rotors. www.frozenrotors.com

Diversified Cryogenics is a great company, ive dealt with them before. The prices are on their site. For them to do a crank, its $125. Its also only $8.35 each for your connecting rods, and they will do an entire engine (block, rods, crank, heads, pistons, rockers, pushrods, EVERYTHING) for $625.00

Id go with the crank and rods. Should be under $200 to get it done, and VERY worthwile. </font>[/QUOTE]heres the thread I got that from

http://www.camarov6.com/cgi-bin/ulti...;f=16;t=002685

[White95]

Wheres that company at??? I'll be more than willing to spend $625 to cryo EVERYTHING!!!Looks like I'll be running more than 10lbs of boost after all :)

[White95]

never mind they'r MN....Can you cryo teat the turbo its self?????

[oil pan 4]

You can most definatly cryo treat the turbo.
A lot of people do it to there turbos.
To save money tear it down becasue you do not need to do the housings. At least get the turbine and shaft, bearings, thrust bearing, compressor and turbine air oil seal.
I checked out there site, it's $50 for long gun barrels like it has been for ever. They will tare a hole in your walet for the small stuff but have good bulk rates.

[White95]

well i don't know if i would trust myself taking apart a turbo...$625 isn't bad if they do the hole engine...i was looking at their site and i don't the $625 includes the block...just everything else including the heads themself

[StudlyCamaro]

what are you doin about the mains? they are gonna blow long before the block is an issue ;)