Custom downpipe ideas needed for very sharp 3" 90 degree bend

so far what i've found from pictures for a sharp 3" 90 degree elbow bend, 4 pie cuts can make the 90 degree bend,

but anybody have tips or other insights for a custom downpipe design for a very sharp 3" 90 degree elbow bend?

thanks

 

i set my bandsaw to 4 deg and make pie cuts. The smaller you make the pieces, the tighter the bends.

 

Metal Doughnut

 

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

the best way. Most of everything I have seen with pie cuts have cracked at one time or another.

 

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

the best way. Most of everything I have seen with pie cuts have cracked at one time or another.</TD></TR></TABLE>

Plus all the weld inside just limits the flow, not to mention the unconventional the bend.

 

but its JDM

 

Here is a cool way to make a precise bend with pie cuts using a nice simple formula I developed.

http://www.homemadeturbo.com/f...55044

 

I used one of these, it is bent on a 3 inch CLR, it is a lot cheaper than buying a donut.

http://www.atpturbo.com/Mercha...e=PPB

 

^nnnnice

 

what's the setup.. i'll get a pictre up tomorrow... for you

 

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

I used one of these, it is bent on a 3 inch CLR, it is a lot cheaper than buying a donut.

http://www.atpturbo.com/Mercha...e=PPB</TD></TR></TABLE>

that's a very nice piece

 

woolf aircraft also sells tight radius stuff. very fast shipping as well and great quality. they have oodles of mandrel bent items...best of luck!

 

ATP Turbo

 

That's deffinately the piece to use.... ATPTurbo.
or bev-tech.net