Anyone building an exhaust ?

Here's a nifty little application.

This allows you to input the required dimensions for a frustrum cone, or cone shaped collector. It then gives you a print out. Cut your steel to shape, roll it and weld and that's you done.

http://www.pulserate.com/index.php?content=product

Not earth shattering, but handy I reckon. Also allows for angled ends and different overall lengths.

Where have you been all my life???

My garage is full of chopped up plastic pipe as I mocked up the collector over and over again!!!

I was going to use conical (and then flattened a bit) collectors made from sheet UNTIL I spoke to a professional race exhaust builder, who told me to make the collectors from tube.

Each 2-1 collector then has no internal edges at all and flows beautifully.

Here's one of mine:



collector 1

you use two 25-35 deg bends, as you can see from the piccy.

THIS LINK

shows nicely how its done.

Anybody got any tips for doing a 4-1 collector out of tube?

i assume it can be done like ND DEVs but just turn the pipes in so the all face the middle. should work

I made one from sheet a while ago.

See jig pic.

Made a rough cone, 2" one end, 5" the other, and welded the seam.

Put the jig in it and tighten nut.
Tap the flat sides with a hammer and re-tighten nut.
Tap then tighten, tap then tighten.

Cut off surplus at the square end and rub with scotch pad.

Still got the dims wrong though as it needs to be +100mm from the flange. (Epona/ 1.8 Zetec) Bu**er


Paul G
Rescued attachment 4-1-s.jpg

see the link in my post for a 4-1 tubular collector on the simpson site. Yep its basically use 4 tubes and just change the cuts on the ends.

quote:

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Originally posted by zilspeed

It then gives you a print out.

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quote:

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Originally posted by philw

quote:

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Originally posted by zilspeed

It then gives you a print out.

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Is the print out actual size? does it act as a template?

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