punkbomb138

i was told by a friend of mine here in wv to talk to you two about a true 3 inch flange for the downpipe setup i want to do. i was told you guys know what you are doing and could possibly help me find the flange i need. i asked him but he didnt know exactly how it fits i thought the bolt holes had to line up to fit it to the turbo. my friend and i measured it and we got a max of 2 and 1\4 we could cut into the flange to make a new setup then step out to 3 inch piping within 3 inches or less. we figured this was the best we could do given it has to bolt to the turbo and make better flow. we were going to start with a stock sized flange and make the hole out to 2 and 1\4 inches insert pipe a in there and weld then come out 2 to 3 inches enlarge to 3 inch and be done with that part. is this a bad idea\setup? it would flow more right? any help you guys can offer is greatly appreciatted.

thanks
james

boxerfan

Oh.... exhaust calcs... I'll have a look at that today... Might just be a simple matter of a target temp you want to stay within. the whole set up will dictate the exhaust temps to a large extent. I'll see what I can come up with.

punkbomb138

you know the more and more im on here it seems you are the primary person who helps. im glad you know alot about alot of stuff. and thanks to everyone else who knows something i dont also.

SteveAngry

<center><img src="http://pictureposter.audiworld.com/4612/carlisle2006.jpg"></center><p>Hey, you can do it tapered or straight 3"...

TJM Motorsport in NH used to sell stainless 3" K-24/6 series flanges you could use. This was almost 2 years ago. Call them.

You could also make your own. Simply mock up the stock flange with a nice flat chunk of metal and drill your 3" outlet and stud holes. Should be easy finding a nice thick piece of mild steel, etc.

Otherwise the tapered idea will work ok. Beats the stock setup anyday.

Here's a pic of the 3" downpipe sitting on my work bench. Sorry it's blurry...I'm in a hurry.

Steve
Michigan

Jon Clay

2 1/4 to 3 inches in about 3-4 inches. My understanding is this is better than just welding the flange to a 3" pipe because it reduces turbulance. summitracing.com sells them with an 02 sensor already welded in it.

good luck,
Jon

birdmanmt

Sorry i didn't reply sooner, i don't check in here that often these days.

boxerfan

<ul><li><a href="http://toyotaperformance.com/turbo_header.htm">How to make a turbo header</a></li></ul>

boxerfan

<ul><li><a href="http://www.homemadeturbo.com/turbo_projects/">turbo projects</a></li></ul>

boxerfan

<ul><li><a href="http://www.bahnbrenner.com/catalog/i83/l172/r175/Mandrel_Bent_Tubes.html">mandrel bent tubes</a></li></ul>

boxerfan

I can't seem to find the one with the flanges... it's out there somewhere!