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-   -   titainium exhaust... (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/titainium-exhaust-467676/)

First gen man 09-28-05 11:23 PM

titainium exhaust...
 
What does every one think of titainium exhaust? Is it weldable to steel? If it is i wanna use a steel downpipe with a titainium exhaust from the end of the down pipe back. Does anyone have any objections? Can it handle rotary heat w/o any wierd effects?

Makenzie71 09-28-05 11:26 PM

titanium will hold up just fine...thing is, why? It's not that much lighter and it's much more expensive.

You can weld steel to titanium but it'll require someone who knows what they're doing.

First gen man 09-28-05 11:27 PM

how less would a full titainium exhaust way up to a steel? about how many pounds down?

Makenzie71 09-28-05 11:29 PM


Originally Posted by First gen man
how less would a full titainium exhaust way up to a steel? about how many pounds down?

depends on teh setup but not enough of a difference to notice.

RETed 09-28-05 11:41 PM

The problem with running these thinner "super" metal is that they tend to "ring".
The rotary pulses are so strong that it tends to ring stainless and Ti exhausts cause manufacturers tend to run thinner gauge metal to produce these exhausts.
Yes, they are lighter, buy can you really tell the difference in weight while driving?


-Ted

snub disphenoid 09-29-05 12:44 AM

I'd only suggest a titanium exhaust if you're dedicating yourself to lightening your car. They're a lot more expensive, and using just a titanium muffler won't save you a lot of weight, so just ask what you aim to do with your car.

Madrx7racer 09-29-05 02:19 AM

it's your money.....but it's a retarded way to spend it.

weight savings and power to cost ratio is not very good.

--MAstermind-- 09-29-05 07:17 AM

if ur going to gut ur car, and lighten it as much as u can(AC, etc etc....) then go for it all the way every little bit adds up....if its ur AC equipped fully interoired car....its not enough to justify.....see where u wanna go and what makes ur comfortable...i plan on getting one march/april of next year....i plan on getting carbon doors and sunroofplug....carbon hood, i have no AC no interoir or TAR and a Ti SINGLE exhaust...that should cut considerable wieght hopefully thats my longterm goal, so it will end up being costeffective...because it all adds up....



BTW a gentleman at my local dyno shop said that making one out of thick aluminum would do i am not a metal fabricator BUT sounds like it wouldnt hack it on a rotary turbo....RETed any comments on thick guage ALUMINUM exhaust..he said it was cheaper than Ti and inbetween if done right.....

(not trying to post jack BUT this could be a cost effective. alternative...)

good luck!

i belive knightsports has a Ti DUAL going for almost 3k! so u can see the
cost to weight to power raito...

RETed 09-29-05 08:02 AM


Originally Posted by --MAstermind--
BTW a gentleman at my local dyno shop said that making one out of thick aluminum would do i am not a metal fabricator BUT sounds like it wouldnt hack it on a rotary turbo....RETed any comments on thick guage ALUMINUM exhaust..he said it was cheaper than Ti and inbetween if done right.....

The guy is an idiot.
It's going to melt.


-Ted

Makenzie71 09-29-05 11:33 AM

Actually I've used aluminum...there's no way it can hold up to the temps seen at the down-pipe or pre-cat areas, but the rest will hold up just fine.

Makenzie71 09-29-05 11:33 AM

...and it burns, not melts...as me how I know...

vex 09-29-05 08:06 PM


Originally Posted by Makenzie71
...and it burns, not melts...as me how I know...

How do you know? ;)

Makenzie71 09-29-05 08:20 PM


Originally Posted by vex
How do you know? ;)

Because a caught a supra's d/p on fire by experimenting with aluminum...

Flem-Ball 09-29-05 08:26 PM

Well, that's one way to find out. lol.

Yeah, not the most cost effective mod you can do.

TonyD89 09-29-05 08:48 PM

First Gen Man, You can't weld titanium to itself or steel with a conventional TIG or MIG. It has to be done in a "Purge Chamber". A big box with windows and gloves attached to it that you slip your hands in. The box is then purged of all atmospheric air (filled with argon) before welding. If you don't do this it will catch fire and burn! Kinda like magnesium. You ever see mag burn? This is one of the reasons it is so expensive, among others.

capn 09-29-05 10:35 PM

well personally seeing as most of us bought our cars for less then a Ti exhaust i dont think its justified

Makenzie71 09-29-05 10:43 PM


Originally Posted by TonyD89
First Gen Man, You can't weld titanium to itself or steel with a conventional TIG or MIG. It has to be done in a "Purge Chamber". A big box with windows and gloves attached to it that you slip your hands in. The box is then purged of all atmospheric air (filled with argon) before welding. If you don't do this it will catch fire and burn! Kinda like magnesium. You ever see mag burn? This is one of the reasons it is so expensive, among others.

bzzzzzz...wrong. Sorry, but you need to do some more research.

TonyD89 09-29-05 11:33 PM

Alloys maybe. Pure Ti, no.

Makenzie71 09-29-05 11:37 PM

Titanium, element or alloy, only requires a clean enviroment. Boxes are stilled used on a small scale but it's not neccessary. U can also use either gas tungsten or gas metal arc welding without ANY problem.

Do your research...

TonyD89 09-30-05 12:38 AM

You can purge the inside of a pipe, and use other good shielding techniqes but i'm thinkin' of the DYI guy. As was said before, you better know what your doing. I don't want to get into an argument, but, Ti will burn. It can be dangerous.


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