Machining a set of Titanium exhaust flanges, would like to find someone

[~TABASCO~]

Hello,

I have a set of Arrow headers and looking for someone that might want to turn out one set, or a few sets of titanium exhaust flanges. Ive had issues with the Arrow aluminum stock ones over the years bending and cracking. Ive used several sets over the years. I actually have a brand new crispy set available to me but I hesitate to install them because I want someone to copy them in Titanium.
Maybe a 6.4 grade?
I know of some aero space machining type guys to knock these out, but Im really not interested in the $XXXXXXX ($500+) bill...

Seeing if anyone has the ability to get some drop scrap and knock a few sets out after work for a reasonable price.. The machinist might want or need a pair for his bike?

Anyhow I thought I might ask, this is a very diverse group and you never know who might be reading this forum.

Thank you

 

[StefanOnHisS10]

That can’t be to difficult, the titanium is expensive I guess.

 

[pooh and xtine]

If only they were stainless steel instead of aluminium!

 

[Superraid]

If only they were stainless steel instead of aluminium!

Stainless would be easy to do, why not go that route .

 

[StefanOnHisS10]

Why not in Stainless 304 or 316(L)? much cheaper, easy to come by and keeps total cost down. Why aluminum, bad choice by arrow.

 

[Superraid]

Could laser cut them in 316 stainless steel, if the finish was a real issue could get them water jet cut, nice smooth finish that way.

 

[~TABASCO~]

Could laser cut them in 316 stainless steel, if the finish was a real issue could get them water jet cut, nice smooth finish that way.

They have a step cut on the inside ID. Not a vertical through cut. They could be laser or water cut on the OD and even the two bolt holes but the ID with that step probably needs to be machined.

Stainless would be better than Aluminum, but Titanium would be better than Stainless I believe in this application...

 

[Superraid]

Tig weld the step on, do you have a photo.

 

[~TABASCO~]

Tig weld the step on, do you have a photo.

Sure. I can post a few.

 

[Wallkeeper]

I am with Super Raid and Pooh, why not 304 SS? Standard 304 SS melts at around 2600 F as compared to Al which melts just over 1200 F. 304 SS and 439 SS are commonly used in very high end exhaust systems because the combination of temperature and corrosion resistance exceeds aluminum or carbon steel. Neither 304 and 439 will work harden like aluminum. I expect 304 is more readily available than 439

I used to evaluate coatings on exhaust systems and the highest I was ever able to get the exhaust manifold of any engine we test bedded was 1340 F, shortly before it seized.

My 2 cents and I hope I am not missing the point of why you are looking at Titanium

 

[SkunkWorks]

 

[~TABASCO~]

I am with Super Raid and Pooh, why not 304 SS? Standard 304 SS melts at around 2600 F as compared to Al which melts just over 1200 F. 304 SS and 439 SS are commonly used in very high end exhaust systems because the combination of temperature and corrosion resistance exceeds aluminum or carbon steel. Neither 304 and 439 will work harden like aluminum. I expect 304 is more readily available than 439

I used to evaluate coatings on exhaust systems and the highest I was ever able to get the exhaust manifold of any engine we test bedded was 1340 F, shortly before it seized.

My 2 cents and I hope I am not missing the point of why you are looking at Titanium

Just throwing this out as my opinion... For me- all of these materials would work fine. In this particular application I think the way the part is used and force being applied, its much more about
tensile strength in the design and how its to be used. I think anything is probably better than the Aluminum stock ones...

 

[Wallkeeper]

Tabasco, I get your point! Thanks for the clarification

 

[magic]

Stainless steel would be a good option if you can't get Ti. Here's another idea, make them out of 7075 T6 aluminum, but make them thicker. Maybe even twice as thick as the originals. You would need longer studs or bolts to make it work. I'd be glad to make some, but I'm retired and don't have access to all those cool machine shop toys anymore.