V6 & V8 teeners - above/below the axles?, Let's see your exahust! |
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V6 & V8 teeners - above/below the axles?, Let's see your exahust! |
3d914 |
Feb 13 2012, 09:52 PM
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#1
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Senior Member Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region |
Seen a couple different approaches for exhaust on V6 & V8 teeners. Gettin ready to fab a Y-pipe for the SHO motor going into the 914. Want to run single exhaust down the right side, muffler in stock position, and single tail pipe out the back-left.
Curious to see different approaches there are for routing exhaust above or below the axles. Post pics! Here's a picture of the 3.2L SHO motor. TIA |
pdlightning |
Feb 13 2012, 10:38 PM
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#2
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Member Group: Members Posts: 207 Joined: 4-February 11 From: Santa Clarita Member No.: 12,660 Region Association: Southern California |
Seen a couple different approaches for exhaust on V6 & V8 teeners. Gettin ready to fab a Y-pipe for the SHO motor going into the 914. Want to run single exhaust down the right side, muffler in stock position, and single tail pipe out the back-left. Curious to see different approaches there are for routing exhaust above or below the axles. Post pics! Here's a picture of the 3.2L SHO motor. TIA I am also interested in the exhaust, but what are you going to do for the intake and filter? |
matthepcat |
Feb 13 2012, 11:25 PM
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#3
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Meat Popsicle Group: Members Posts: 1,462 Joined: 13-December 09 From: Saratoga CA Member No.: 11,125 Region Association: Northern California |
My 350 used to have one side cross under the oil pan meet up with the other side. This went through a 3" cat and a flow master in the stock location.
This configuration was great because no drone! Should have kept it. Oh and it went under the axles (holds axles off the ground if your cv blows out!) |
jimkelly |
Feb 14 2012, 10:21 AM
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#4
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
drone - not sure i will ever grow accustomed to it (IMG:style_emoticons/default/sad.gif)
an upside to dual exhaust is that when hooked to a sniffer - you can see if one bank of 4 cylinders is buring different than the other. Attached image(s) |
andys |
Feb 14 2012, 11:06 AM
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#5
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Advanced Member Group: Members Posts: 2,165 Joined: 21-May 03 From: Valencia, CA Member No.: 721 Region Association: None |
Over the axles.
Andys Attached thumbnail(s) Attached image(s) |
slothness |
Feb 14 2012, 11:58 AM
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#6
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It's business time Group: Members Posts: 110 Joined: 7-October 04 From: Valencia, CA Member No.: 2,906 Region Association: Southern California |
I went over the axles too for maximum lower-ability (IMG:style_emoticons/default/blink.gif)
Just beware if using block huggers...don't use em. The collector dumps right out on the shift rod on the drivers side, angling the bend is a true bitch. I wanted to go y-pipe also but I bought all my parts long ago before I discovered all my mistakes and couldn't return them. I ended up building a custom straight shift rod linkage per the Jwest design and now there is more room down there. Beware you might have to unexpectedly fabricate some items. Ignore the poor welds, they dont leak (IMG:style_emoticons/default/smash.gif) |
Andyrew |
Feb 14 2012, 12:06 PM
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#7
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Spooling.... Please wait Group: Members Posts: 13,377 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
Above the axles is the only way to fly.
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slothness |
Feb 14 2012, 12:13 PM
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#8
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It's business time Group: Members Posts: 110 Joined: 7-October 04 From: Valencia, CA Member No.: 2,906 Region Association: Southern California |
Oh and the heat shields in Andys first pic is a recommended idea for going over the axles. I can probably roast a pig in my trunk on a 30 minute drive. mmmmm
You'll probably have less of a problem with that being a single side muffler, but its something to think about. |
bulitt |
Feb 14 2012, 01:07 PM
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#9
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Achtzylinder Group: Members Posts: 4,188 Joined: 2-October 11 Member No.: 13,632 Region Association: South East States |
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andys |
Feb 14 2012, 01:20 PM
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#10
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Advanced Member Group: Members Posts: 2,165 Joined: 21-May 03 From: Valencia, CA Member No.: 721 Region Association: None |
Over the axles. Andys Did you just weld up a bunch of pipes, have them bent, or is it the ass end of an available kit (like an axle back section of a mustang as an example)? Thanks I bought stainless mandrel bends from Summit and TIG welded them together. Mufflers are FlowMaster 3 chambered for reduced interior noise. A note on heat shielding: don't forget to shield the shocks in the event your muffler or pipe is close; no need to heat up the shocks un-necessarily. Can't see it in the photo, but there's a shield between the shock and the muffler. Andys |
Andyrew |
Feb 14 2012, 01:22 PM
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#11
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Spooling.... Please wait Group: Members Posts: 13,377 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
Muffler shop. 5 years ago they did mine for 300 including 2 magnaflows and resonated tips.
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computers4kids |
Feb 14 2012, 10:28 PM
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#12
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Love these little cars! Group: Members Posts: 2,443 Joined: 11-June 05 From: Port Townsend, WA Member No.: 4,253 Region Association: None |
No drone, over the axles and a crossover pipe with SBC
(IMG:http://www.914world.com/bbs2/uploads/post-4253-1233890821.jpg) |
3d914 |
Feb 18 2012, 09:37 AM
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#13
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Senior Member Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region |
Great feedback guys, thanks. Above the axles it is. I wanted to keep the exhaust as close to the trunk as reasonable and was concerned about heat. I'll plan for some kind of shielding - similar to the stock muffler shield welded to the underside. That keeps it off the exhaust.
I am also interested in the exhaust, but what are you going to do for the intake and filter? pd, The intake will use the stock manifold as shown, fed by straight tubing from the rear of the trunk where a naca duct will draw intake air in. The MAF sensor will sit between the filter box, under the naca duct, and the throttle body. I'll also have to fab a metal or FG riser to the forward part of the trunk/engine lid to cover the exposed throttle body. |
914.SBC |
Feb 18 2012, 11:21 AM
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#14
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Member Group: Members Posts: 248 Joined: 12-December 10 From: CORONA, CA Member No.: 12,479 Region Association: None |
Attached image(s) |
TC 914-8 |
Feb 18 2012, 06:52 PM
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#15
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Senior Member Group: Members Posts: 814 Joined: 23-May 08 From: Sequim, WA Member No.: 9,090 Region Association: Pacific Northwest |
My car now, SBC goes over the axles, never thought about the heat in the rear trunk (IMG:style_emoticons/default/confused24.gif) I'll have to check it out. this does give better clearance and more roome for mufflers.
My first 914 had a Capri V-6, I went under the axles and used a bursch exhaust, dual in, single out left side. It sounded just like a Porsche 6. Hot and loud once it aged and blew out the FG glass packs. The single chrome 2-1/4 outlet was very 6ish. yes, I was a poser in the 80's, and still can't afford the real deal 6 (IMG:style_emoticons/default/hissyfit.gif) Your Ford SHO is the bomb (IMG:style_emoticons/default/aktion035.gif) |
3d914 |
Feb 18 2012, 07:49 PM
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#16
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Senior Member Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region |
Thanks for the encouragement. TC - got some pics?
914.sbc - nice test stand for the engine. I think I overdid it with mine. I wanted it to be able to stand up on end for storage. Found a design on the net and modified it. |
3d914 |
Feb 18 2012, 08:01 PM
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#17
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Senior Member Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region |
Here's the mockup pics for the down pipes from the two headers that will merge into a single 2.5" exhaust. Fortunately it merges on the right side, away from the shift bar. PVC is 2in ID - same as mandrels.
Left side. Piece of 1.5" square steel represents the engine bar. Don't want to weld it until I test fit in the engine bay. Front. Could have come straight down with the right pipe, but need an extra inch of clearance when its on the engine cradle during testing. Right - well already see something I'll need to fix. Mockup's doing its job. |
matthepcat |
Feb 18 2012, 08:03 PM
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#18
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Meat Popsicle Group: Members Posts: 1,462 Joined: 13-December 09 From: Saratoga CA Member No.: 11,125 Region Association: Northern California |
Good idea using PVC pipe. Also great choice merging into a single pipe, as it is one of the easiest ways to have NO drone.
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3d914 |
Feb 18 2012, 10:12 PM
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#19
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Senior Member Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region |
matt, can you elaborate on the "drone"?
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matthepcat |
Feb 19 2012, 12:41 AM
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#20
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Meat Popsicle Group: Members Posts: 1,462 Joined: 13-December 09 From: Saratoga CA Member No.: 11,125 Region Association: Northern California |
Drone is when your exhaust creates a harmonic vibration often changing depending on RPM and engine load. Conversions with "true dual" exhaust routing seem to suffer from an aggressive version of this problem.
Ever ride in a hotrod with no carpet, and 2chamber flow masters that dump at the rear axle? Drives you crazy on a longer drives. |
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