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Exhaust for my EJ20T

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72type3wrx Seriously Crusin Dubber

152 posts · joined Aug 2006 ·

#588537
Hey Guys

any ideas for my new exhaust? pics of yours? I want something that will be nice and quiet but of course not restrictive.

my old non turbo motor had the extractors running forward into a big muffler that was under the trannie, then two pipes that went up and threw the engine bay with two little mufflers in the engine bay with pipes exiting just below the boot lid, it was extremely quiet except for the top end and looked great, only problem was after a couple of years the lower muffler has taken a beating
(http://s4.photobucket.com/albums/y134/davidbosa/?action=view&current=9374.jpg)

remember I have irs and also a radiator at the back so there's really no room for a big muffler at the back

also what size and do I really need mandrel bends??
1972 Type 3 Fast back, RS Turbo 2ltr, VF34/P20,
3" Exhaust, WAIC, Wolf 3D, Sard 540cc's, Swirl pot and VL Fuel pump, Apexi CAI, Custom VW 4spd with straight cut albins 3.87 R&P, stock brakes

ratbug aka toddy101

439 posts · joined Jan 2003 ·

#588624
I am about to tackle this as well, but in a buggy so will be a bit different. You going to get it done out of stainless steel or mild steel? I am going to make mine out of stainless. I don't know if anyone sells stainless flanges for the engine/turbo, but am going to draw them up in CAD tonight and get a quote to get them laser cut. 2.5" is a good size for a 2ltr turbo. You don't need mandrel bends, however they are better, less restrictive and look better. The noise is all dependant on the muffler, i've tried a few types on my 2ltr n/a ej20, first one was a reverse flow muffler and it I could hardly hear it. A cheap cannon muffler was loud and raspy, sounded like a quad.. It only lasted 5mins until i had enough. I replaced it with a solid straight through oval muffler, very nice deep rumbling sound, yet not that loud. The turbo will also help in quiting the exhaust down when compared to an n/a motor.

If i go ahead and get some flanges laser cut, i will probably do a few sets (only cost a bit more for a few sets compared to just one). The bends I will buy off the shelf mandrel bends for 45-90-180 bends, and get the exhaust shop to bend up any custom bends i need.
Sharbuilt Beach buggy with Subaru 2L Turbo
Thunderanch Riot with Subaru 2L Turbo
Manxter with FA20turbo
Click here for wiring looms

boof2332 Custom Title Time!

1,210 posts · joined May 2004 ·

#588661
I made mine and the one for the splity out of 3 inch mild steel. You can buy the mandrels in a variety of bends and then just cut them to suit. A triflow muffler is the highest flowing quiet mufflr and costs about $100. It s importand to make a splitter ff the back of the turbo for the best gains. I ca make on if you get stuck as they can be expensive. Mine runs next to the heads and not at the back.
matt

Klaus Custom Title Time!

1,439 posts · joined Aug 2004 ·

#588696
I used 3inch mandrels aswell and just a 2 1/4 hotdog with the stock subie front cut cat with all the shroud taken off and the outlet modified . Heres a shot .

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Klaus Custom Title Time!

1,439 posts · joined Aug 2004 ·

#588698
Forgot to take pics of it complete, too keen to get it on the road.

ricola Wolfsburg Wizard

437 posts · joined Feb 2003 ·

#588845
You cna buy stainless steel flanges from either vwrx.com or ebay in US quite cheaply...
Rich
http://www.ricola.co.uk