Getting ready for Bonneville(rebuild)

[saltfever]

WOW.........You are going to have a ton of wiggly lines to look at after a run!
Does that mean it also records his tire tracks?   FREUD 

Got those on video. 

[bvillercr]

WOW.........You are going to have a ton of wiggly lines to look at after a run!
Does that mean it also records his tire tracks?   FREUD  

Got those on video.  

like this one.

http://www.youtube.com/watch?v=Udo7XM472Qk

[bvillercr]

Or these:

http://www.youtube.com/watch?v=mHUEA-pScY8

http://www.youtube.com/watch?v=55XA0vrNNj0

[saltfever]

I see a rooster-tail but no tire tracks! Thats the problem with loose adobe 

[bvillercr]

I see a rooster-tail but no tire tracks! Thats the problem with loose adobe 

Speaking of loose adobe, here you go.

http://www.youtube.com/watch?v=17HOby9FnC8

[bvillercr]

We got the flanges and some pipe, not sure if we will use the pipe.  It wasn't what we thought it was going to be.

[jl222]

We got the flanges and some pipe, not sure if we will use the pipe.  It wasn't what we thought it was going to be.

  I ordered stainless u-bends from summitt racing and when they arrived I checked to see if they were non-magnetic [they wern't]
after checking the companys web site [dynomax] I found out that it was 409 stainless steel but it will rust a bit and is used on auto applications were appearance doesn't matter.
  Oh well live and learn, I thought stainless steel meant no staining
 I hope to order 304 stainless from Columbia River Mandrel Bending tomorrow.

            JL222

[jdincau]

It's only "stainless" to the people selling it. The people manufacturing it call it "corrosion resistant"

[saltfever]

Quite a few years ago (can’t remember exactly) the EPA upped the mileage requirement on all emissions equipment. A few existing items were upgraded and required to last 70,000 miles instead of the original 50,000 requirement and new items were added to the list. While EGR and the pump were part of the original EPA requirements the actual exhaust pipe system was not, due to the tremendous cost and OEM resistance. I can’t remember the steel company but a new formula was created to be low cost (relatively) and malleable. That is when EPA include the exhaust system under the 70,000 requirement. 409 stainless was created solely as a cheap material to meet EPA mandates. It is still more costly than aluminized tubing so you will find 409 used sparingly unless it is an expensive car (i.e., more profit for the OEM). On cheaper cars, 409 is used only where aluminized tube will not survive the 70,000 mile mandate. This is typically, but not always, in the headers, and CAT. I haven’t cared to keep up with the EPA so my numbers above are probably wrong or outdated. I agree that 409 is mislabeled. However, even from the beginning 409 was called stainless because of its nickel content which is far less than either 304 or 316. It was marketing swill and it perpetuates to this day. Corrosion resistant steel (CRES) and stainless are words used almost synonymously on most drawings and specifications. Those in the industry who see either word will ask for further specification of either 304 or 316 because of the tremendous cost difference. You can never rely on the word “stainless” due to the tremendous range of alloys, properties, and cost. Much marketing of 409 in the aftermarket is relying on the consumers lack of knowledge.  YMMV   

[bvillercr]

If it looks to good to be true it must be something you probably don't want.  looks like another day gone by, and another rush order to be placed Monday or Tuesday.   there's always a learning experience just around the corner.

[jl222]

 Saltfever.... corrosion resistant or cres doesn't apear in the add or 304 in the borla tubing that is the good stuff but I did find 304 U bends from Columbia River tube for not much more in price but will ask more questions before buying this time.
 No problem returning to Summit but I have to pay shipping.

                             JL222

[GH]

John and Troy, all my stainless steel is either 304 or 316, but I am lucky to know a couple of people who work at a food processing equiptment plant who use stainless steel. Even got many T-304 180 degree bends in the 3" OD size.

[Rex Schimmer]

John and Troy,
Most "race car" stainless headers are made from 321 stainless as it is stronger and has higher strength at temperature than 304. If you look up the stength properties of 304 you willl find that it has about the same tensil and yeild strenght as mild steel and when use for headers really only provides protection against salt. Don't forget to get the special weld flux for doing stainless or make up some plugs and argon line for purging the ID of the tube while you weld or you will get a really ugly looking weld on the inside of the tube that is both restrictive but provides a great place for the weld to start cracking.

Rex

[saltfever]

Rex, great point about purging the inside!  Good information about 321. Thanx. 

[bvillercr]

Lots of grinding in our future.   flanges need to be ported.