Originally Posted by Dicko
how easy/hard will it be to fabricate a swedish plenum?my mates a fabricator and said he will have a go if i can get the measurements and a few pics to see how it goes together, do they need anything special to control the airflow or are they pretty much just a metal box?
and if anyones got one could they give me the measurements and dimensions PLEASE
They're piss easy to fabricate providing you can accurately machine / cut the metal and are able to TiG weld. As already mentioned to make one to give equal / near equal air flow is a different matter all together.
About 3 months ago I made one of these to fit a 4x4 Saff that belongs to a good friend, IIRC it took about a day of messing about to get good airflow between all cylinders and to ensure it was rigid enough to take 50PSI without any expansion of the walls. Now that I have all the dimensions I reckon the actual fabrication time is probably only 30 to 60 minutes (un-polished and with the un-smoothed welds).
TBH I'm not sure how people manage to make alloy plenums which are apparently so easy to split (I'm referring to some of the recent posts on here stating something to that effect), the quality of the materials used and/or the welding must be absolutely shocking if they split that easily
In regard to dimensions; that’s something you'll have to find out for yourself, I don't think anyone who has spent time getting decent flow is going to give away that information for nothing.
Also tapered plenums have been around for ages, hardly something unique; most "original" ideas aren’t, they're just variations of themes or copies of copies.