Chrome-Moly OR Regular??? STB

[SuprSpdDB7]

i am getting ready to purchase the BMR STB.
i wanted to know the difference between the Chrome-Moly Version and the Regular one...

I don't mind spending the extra dough, but it needs to be worth it... Can someone please help!

TIA,
J

[MrCoffee]

chrome moly is stronger and lighter. Its not worth the extra money unless you're trying to build a pro track autocross car.

[V6Bob]

I had the same question.

What I found out was that chrome-moly needs to be heat treated after welding or the weld area is no stronger than mild steel. They guy at BMR said (about two years ago) he didn't heat treat after welding. I got the mild steel.

[Arctc Wolf]

it's only good if u want the lower weight. I got the regular one cuz I didn't have the cash for the one i really wanted.

[Dominic]

The regular one is fine, the chrome moly is a waste of money unless you need to further support your ego [img]smile.gif[/img] .

[12secondv6]

Yup, chrome moly is not for the everyday person.
Chrome moly is stronger and much lighter and obviously more expensive.
I have spoken so a couple of aftermarket companies.
When I was deciding between a chome moly vs mild steel k member they all said the same thing:
stronger
lighter
more expensive
do not use on the street, track only
I was told that since the chrome moly is soooo strong it is not forgiving, no flex. On a street car running over various bumps etc they have come across chrome moly k members that have snapped due to no flexing.

I would just stick with the mild steel

[SuprSpdDB7]

hmm... regular it is.... time to go order my STB

[V6Bob]

I trust people understand that chrome-moly is not _lighter_ than mild steel. It is stronger so you can use tubing _thinner_ than mild steel that weighs less but that is just as strong or stronger. But it's tricky to get it right.

"I was told that since the chrome moly is soooo strong it is not forgiving, no flex. On a street car running over various bumps etc they have come across chrome moly k members that have snapped due to no flexing."

BS. Chrome-moly is used in high speed race cars where the bumps have a lot more force. Snapping is due to poor design or poor construction. Chrome-moly is "less forgiving" because it is harder to design and fabricate properly.

"do not use on the street, track only"

I'd say - do not use unless you _know_ the designer and constructor are experts in using it. In a lot of street parts it is used for pose value. Race guys are more likely to do it right.

[SuprSpdDB7]

V6BOB:
which one do you have?

[V6Bob]

Mild steel. See my earliest post in this thread.

[SuprSpdDB7]

dur... [img]graemlins/dunce.gif[/img]

[Everglades W68]

Go with steel because that's what I bought; therefore, it has to be the right choice. ;)