Hello,

I was wondering if anyone knows what the thinnest material I can use to make a turbo manifold? I understand that people normally use Sch 40 pipe, but is it possible to use Sch 10 or thinner? Is the design of the turbo manifold a factor on the thickness usage?

I have heard people use 16ga material thickness for turbo manifolds is that ok? If I use thinner materials (besides Sch 40), what are the disadvantages? Any advantages? hehe...also, how heavy is a turbocharger anyways?

Any inputs would be appricated.

best regards

 

16ga. is considered "normal" size for exhaust manifolds, though import guys seem to think sch 40 is normal. 16ga 321 stainless will be a super strong manifold if fabricated right. I've made them from 18ga as well, but I wouldn't bother for a street car. Inconel headers are as thin as 20ga!

 

Sched 10

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">16ga. is considered "normal" size for exhaust manifolds, though import guys seem to think sch 40 is normal. 16ga 321 stainless will be a super strong manifold if fabricated right. I've made them from 18ga as well, but I wouldn't bother for a street car. Inconel headers are as thin as 20ga!</TD></TR></TABLE>

Tony always keeping it real

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">16ga. is considered "normal" size for exhaust manifolds, though import guys seem to think sch 40 is normal. 16ga 321 stainless will be a super strong manifold if fabricated right. I've made them from 18ga as well, but I wouldn't bother for a street car. Inconel headers are as thin as 20ga!</TD></TR></TABLE>

Hi,
Thanks for the quick reply Tony1, I have a question again though...if you use 14ga, 16ga, 18ga, or even 20ga pipes..do you just get those normal U-bends and 90-bends that are used when making exhaust piping? and you just chop chop chop to the correct lengths and angles?

Thanks again for the help...I wanna make a manifold in the future...

regards

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by legendboy &raquo;</TD></TR><TR><TD CLASS="quote">Sched 10 </TD></TR></TABLE>

hi Legendboy,

Thanks for the reply...I will see if I can get these sch 40 or 10 pipes locally, if not then I will buy online. On since I got your attention Legendboy, I asked a question regarding the collectors that you sell. You mentioned that you sell them in both stainless and mild steel, welded and unwelded. Do you have a price list or something that I can refer too in the future if I do decide to buy a collector?

so something like:
Stainless welded -$____
Stainless unwelded-$____
Mild steel welded-$___
Mild steel unwelded-$___

and how much is your shipping?

thanks again...

regards

 

i use schedule 10 and 40. however i prefer sched 10. i think its PLEEEEENTY THICK.

 

Something like this

Stainless welded -$ 125
Stainless unwelded-$ 65
Mild steel welded-$ 95
Mild steel unwelded-$ 45

I know there is a guy doing it cheaper. Thats ok tho. I sell plenty as it is

 

Thanks...ill see if I can use Sch10 instead or even try 16ga or 14ga..hehe.

And legendboy, ill contact you once I am ready to buy a set...how much is shipping for those?

Thanks,
hondaboii

 

Crap, I should have ordered schedule 10 instead of 40 Do all you guys pretty much use 1/2" flanges with sch10? Or 3/8? Good info

Nate

 

I heard most of them use 3/8" just make sure you bolt it on a thick (like 1/2" plate) so that thing wont warp! hehe...but what do I know, I havent even made anything...

 

what gauge is sched 40 equivalent to anyways? charts/conversions?

 

i use sched 40 304L

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XDEep &raquo;</TD></TR><TR><TD CLASS="quote">what gauge is sched 40 equivalent to anyways? charts/conversions? </TD></TR></TABLE>

around 6-7ga thickness....sch40 is I think around 0.188" thickness...

 

hm. i wonder what the losses are with running that thick of a tubing vs. 16..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XDEep &raquo;</TD></TR><TR><TD CLASS="quote">hm. i wonder what the losses are with running that thick of a tubing vs. 16..</TD></TR></TABLE>

What do you mean by losses? performance wise? like HP? I doubt that there will be any performance loss, just a difference in durability...but what do I know! im new to this!

good luck!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaboii &raquo;</TD></TR><TR><TD CLASS="quote">

What do you mean by losses? performance wise? like HP? I doubt that there will be any performance loss, just a difference in durability...but what do I know! im new to this!

good luck! </TD></TR></TABLE>

heat dissipation. you want to keep the heat in. thicker tubes absorb the heat = power loss to the turbo. thin tubes = less heat loss, surrounding air insulating heat in = power retained. downside is of course like you said, structural strength. thats where the proper bracing comes in..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XDEep &raquo;</TD></TR><TR><TD CLASS="quote">
heat dissipation. you want to keep the heat in. thicker tubes absorb the heat = power loss to the turbo. thin tubes = less heat loss, surrounding air insulating heat in = power retained. downside is of course like you said, structural strength. thats where the proper bracing comes in..</TD></TR></TABLE>

Ahh...well, there ya go! I learn something everyday! hehehe...and I do stupid things everyday! I just accidentally ordered 14 pieces of 90* Sch10 Stainless 304L from McMaster.com! AHHHHHH!

 

Schedule 40 = .145"
Schedule 10 = .109"
16 gauge = .0625"

Sonny

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sonny &raquo;</TD></TR><TR><TD CLASS="quote">
Schedule 40 = .145"
Schedule 10 = .109"
16 gauge = .0625"
Sonny</TD></TR></TABLE>

Well that all depends on the size of the pipe. Schedule #'s are variable. I ran across this link when I was wondering about Schedule numbers:

http://www.mcnichols.com/produ...e.htm

What I don't understand is that neither the ID or OD are the same as the "Pipe Size" ?!?

Anyway, they might be another source for elbows.
http://www.mcnichols.com/produ....html

 

he is using figures for 1.5" pipe size, which is the norm for our runners and coincides with the table you provided.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XDEep &raquo;</TD></TR><TR><TD CLASS="quote">he is using figures for 1.5" pipe size, which is the norm for our runners and coincides with the table you provided.</TD></TR></TABLE>

yeah I know that . . . just saying that these aren't constants so that when someone orders a diff size they don't expect a certain wall thickness.

 

this is not turbo manifold related..but I didnt want to start a new thread so ill just ask it here...I saw McMaster sell these 90* bends 16ga tubing. The size of the bend is 2 1/2" but I was curious if this is ok to use for exhaust tubing? This is the temperature range " -10° to +125° F" Is that enough for exhaust or does it get hotter? This is just for the exhaust tubing not for the manifold...

This is the description "5099K12
Carbon Steel Vacuum Tube Fitting 90 Degree Elbow For 2-1/2" Tube OD"

Thanks very much for all the help!

regards,
hondaboii

 

wow

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sonny &raquo;</TD></TR><TR><TD CLASS="quote">
Schedule 40 = .145"
Schedule 10 = .109"
16 gauge = .0625"

Sonny</TD></TR></TABLE>

Schedule 10 is really quite thick. Sch10 is better than Sch40 because for the same OD you get a larger ID. The same could be said of 16ga but I find pipe comes in tighter CLRs and is easier to weld.