View Poll Results: Which is the best all round manifold
Cast Manifold
27
36.00%
Stainless Manifold
48
64.00%
Voters: 75. You may not vote on this poll
Cast or Stainless Steel manifold?
#26
Freedoms worth a buck o'5
Join Date: May 2001
Location: Calgary Alberta Canada
Posts: 2,544
Likes: 0
Received 1 Like
on
1 Post
Originally posted by setzep
serious!? Ever have him quote for 316SS?
serious!? Ever have him quote for 316SS?
#28
Freedoms worth a buck o'5
Join Date: May 2001
Location: Calgary Alberta Canada
Posts: 2,544
Likes: 0
Received 1 Like
on
1 Post
I am kinda fortunate to be in the mechanical trades I guess, I run across alot of good places to buy stuff to make parts out of.. I went to place that does industrial stainless piping for plants and process equipment, I have worked with them on a couple of different worksites, they let me take as much as I could carry from their scrap pile for 25 bucks..Max
#29
"we use stainless steel tubular manifolds on our single kits..greddy makes a nice one off there T-78 kit"
I run one of these manifolds on my T04 setup... they are a work of art!
Check this (before it was polished):
I run one of these manifolds on my T04 setup... they are a work of art!
Check this (before it was polished):
#30
Looking for a S5 TII??
Join Date: Feb 2002
Location: Grand Junction, CO
Posts: 338
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Dragon
If you go with a mild steel manifold you will get the flow of the stainless with out the cracks and broken welds, just won't look as pretty...
If you go with a mild steel manifold you will get the flow of the stainless with out the cracks and broken welds, just won't look as pretty...
Originally posted by zyounker
SS is more brittle.. and tends to crack.. But i would go with stainless myself
-Zach
SS is more brittle.. and tends to crack.. But i would go with stainless myself
-Zach
~J
~Jeremy
Last edited by fast13b; 05-05-02 at 01:28 AM.
#31
20B N/A Wide Body FC3S
Originally posted by fast13b
no way in hell do not ever (am I clear?) get a mild steel turbo manifold. If you do, I'll laugh at you and send you pics of mine so you can see what you have to look forward to. I kept it for a mantle peice.
~Jeremy
no way in hell do not ever (am I clear?) get a mild steel turbo manifold. If you do, I'll laugh at you and send you pics of mine so you can see what you have to look forward to. I kept it for a mantle peice.
~Jeremy
#32
what????
second that, i have had no problem with steel headers, in fact i hav ehad more problems with stainless due to its unstable characteristics, unless it is super thick you have to brace it.
i have been hanging out with a bunch of pro stock and pro 5.0 motor heads lately and they are all using steel headers but the trick is that you must TIG weld them with silicon-bronze welding rod it is a low heat filler and offers slight flexibility, this and ceramic coating the inside seems to be the trick. as of now i am only going to make my headers this way!!!
one of the main reasons for failure as Ted said is the resonance of the engine and the resonance of the turbo. i have found that if you brace the turbo to the engine no header will crack. if your tubo is spinning at 100k plus rpms and the engine at 8k rpms, the weak point would be the header
i have been hanging out with a bunch of pro stock and pro 5.0 motor heads lately and they are all using steel headers but the trick is that you must TIG weld them with silicon-bronze welding rod it is a low heat filler and offers slight flexibility, this and ceramic coating the inside seems to be the trick. as of now i am only going to make my headers this way!!!
one of the main reasons for failure as Ted said is the resonance of the engine and the resonance of the turbo. i have found that if you brace the turbo to the engine no header will crack. if your tubo is spinning at 100k plus rpms and the engine at 8k rpms, the weak point would be the header
#35
Looking for a S5 TII??
Join Date: Feb 2002
Location: Grand Junction, CO
Posts: 338
Likes: 0
Received 0 Likes
on
0 Posts
Ok, I posted those pics in the gallery.
https://www.rx7club.com/photo/index....e=2&si=fast13b
~Jeremy
https://www.rx7club.com/photo/index....e=2&si=fast13b
~Jeremy
#41
Rotary Motoring
iTrader: (9)
Just to have the inside coated as well Node. The ceramic coating gives the inside a MUCH higher thermal rejection factor so less exhaust heat transfers to the manifold material.
The over 200% better heat rejection over mild steel part of why SS manifolds can be 4x thinner than mild steel ones AND last longer. Less heat transferring to the manifold also means more heat to spool that turbo!
Heat rejection is purely a surface phenomenon so ceramic coatings DO help.
Heat disipation rate and material melting point are another thing altogether- don't themal wrap tubular mild steel turbo manifolds, even if they are built thick. Don't wrap stainless as it makes the expansion cracking more likely.
Another reason SS cracks so easily is that its rate of expansion is MUCH higher than mild steel- couple that w/ a design incorporating 1.5mm runner thickness and 1/4" base flange and it is easy to see why they crack here where thermal expansion forces are greatest.
If you can afford Inconel turbular manifold I hate you!
The over 200% better heat rejection over mild steel part of why SS manifolds can be 4x thinner than mild steel ones AND last longer. Less heat transferring to the manifold also means more heat to spool that turbo!
Heat rejection is purely a surface phenomenon so ceramic coatings DO help.
Heat disipation rate and material melting point are another thing altogether- don't themal wrap tubular mild steel turbo manifolds, even if they are built thick. Don't wrap stainless as it makes the expansion cracking more likely.
Another reason SS cracks so easily is that its rate of expansion is MUCH higher than mild steel- couple that w/ a design incorporating 1.5mm runner thickness and 1/4" base flange and it is easy to see why they crack here where thermal expansion forces are greatest.
If you can afford Inconel turbular manifold I hate you!
#43
Eats, Sleeps, Dreams Rotary
iTrader: (1)
Inconel is a great material for headers/turbo manifolds.
Very heat resistant, and all kinds of other good properties.
Has nickel and a few other metals in it.
Its used for turbine blades too.
But very expensive. I think its like more than 3x the price of SS. Used on lots of high performance cars, and supercars who can afford it.
http://www.burnsstainless.com/TechAr...l_article.html
Very heat resistant, and all kinds of other good properties.
Has nickel and a few other metals in it.
Its used for turbine blades too.
But very expensive. I think its like more than 3x the price of SS. Used on lots of high performance cars, and supercars who can afford it.
http://www.burnsstainless.com/TechAr...l_article.html
#44
Rotary Motoring
iTrader: (9)
Yeah, turbo race cars use tubular Inconel
manifolds "clamshelled" in in carbon fiber to retain more heat and special cast stainless steel turbo exhaust housings with heat retaining carbon fiber turbo scatter shields.
But, they are regulated to old turbo tech in some ways- I haven't seen a major turbo class that allows variable geometry turbos even though they are in (even American!) production cars now.
manifolds "clamshelled" in in carbon fiber to retain more heat and special cast stainless steel turbo exhaust housings with heat retaining carbon fiber turbo scatter shields.
But, they are regulated to old turbo tech in some ways- I haven't seen a major turbo class that allows variable geometry turbos even though they are in (even American!) production cars now.
#45
we use and recomend ss on all manifolds but you must be sure what grade of ss and welding procedure you use to have the best flowing, looking and reliable manifold that can be built we know because we build them every day and our quality speaks for its self CHECK OUT ASETURBO.COM
#50
Full Member
Join Date: Jan 2003
Location: Hong Kong
Posts: 177
Likes: 0
Received 0 Likes
on
0 Posts
Anyone had experience with this piece?
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2430336692
Don't tell me I'm the lastest sucker to this game.
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2430336692
Don't tell me I'm the lastest sucker to this game.