Muffler Options for T4 Header, Updated to SpinTech Muffler Options

[7TPorsh]

Working out installing a msds T4 header and am considering muffler options. My first choice was to attach a flowmaster to the end of the collector and add a tail pipe....header exits on the driver's side.

It is turning out there may not be enough room since the header collector and reducer put the flange out near the end of the trans. I can route the pipe and muffler across the back and exit the passenger's side but then I need to change my valance.

I think curving the pipe back to the driver's side will be tight; and hard to find a shop to spend the time.

I remember seeing some kind of 911 muffler, banana type, that had the inlet and exit on the same side. Was that a custom job? Are they effective?

Has anyone done this setup? How do you mount the muffler?

[914forme]

Working out installing a msds T4 header and am considering muffler options. My first choice was to attach a flowmaster to the end of the collector and add a tail pipe....header exits on the driver's side.

It is turning out there may not be enough room since the header collector and reducer put the flange out near the end of the trans. I can route the pipe and muffler across the back and exit the passenger's side but then I need to change my valance.

I think curving the pipe back to the driver's side will be tight; and hard to find a shop to spend the time.

I remember seeing some kind of 911 muffler, banana type, that had the inlet and exit on the same side. Was that a custom job? Are they effective?

Has anyone done this setup? How do you mount the muffler?

Tangerine Racing - EVO II silencer. Single inlet, and outlet, streatable muffler, anything Chris does and sells seems to work very well. Im sure if you ask he can work something up, though his header is the best one I ever owned.

[era vulgaris]

Tangerine Racing - EVO II silencer. Single inlet, and outlet, streatable muffler, anything Chris does and sells seems to work very well. Im sure if you ask he can work something up, though his header is the best one I ever owned.

(IMG:style_emoticons/default/agree.gif) I'm running the Evo II as well as the tangerine 1 5/8 racing header. Very happy with it! Really deep and throaty at idle, up to a scream at high rpms. I almost shat myself the first time I heard it fire it sounded so good! (IMG:style_emoticons/default/biggrin.gif)
I'll also say that the stub pipes on the header are a bit of genius. No need to remove the exhaust studs if you need to pull the header.

http://www.tangerineracing.com/914headers.htm

[7TPorsh]

Tangerine is way out of my budget. Was thinking an sc muffler. ?

[7TPorsh]

I am thinking of one of these? Anyone have one on a 914?

[porschetub]

I don't see why not they are a pretty good design,without seeing your system you could have some clearance issues so some work may be required there.
Upside....easier to find than the dual inlet (cheaper),should give a nice exhaust note also
Downsides.....they are very heavy and will need good support,perhaps the stock support bracket may need beefing up and modified more like the bracket on the 911 then you could use those 911 clamps.
Renspeed (i think) have the clamps in stainless....very good quality bought a set last month.

[aircooledtechguy]

I'm about a month away from firing mine up for the Squarsche. I'll let you know how it sounds and works.

(IMG:http://www.914world.com/bbs2/uploads_offsite/images.thesamba.com-9730-1438212549.1.jpg)

[Chris914n6]

I have the SC on my nissan vq30. Exits out the factory valance notch on the drivers side. Fit is good.
It's a 75 chassis so I welded on brackets to hang it from bolts where the bumper shocks used to be.

[7TPorsh]

Here is what I am looking at...car is on ramps so pics are a little difficult. You can see how far out the header comes. I can't seem to slide the collector all the way on. When I add the reducer there's no room for a muffler.

There is a lot of room back there and thought this sc muffler setup may work but i don't know dimensions of the muffler...will it fit up behind the bumper and valance?

Can I mount it to the stock bracket points and run the pipes in and out?

[Chris914n6]

(IMG:http://www.914world.com/bbs2/uploads_offsite/lh3.googleusercontent.com-431-1438300747.1.jpg)

(IMG:http://www.914world.com/bbs2/uploads_offsite/lh3.googleusercontent.com-431-1438300749.2.jpg)

[Dave_Darling]

Is that a rubber mount between the muffler and body?

--DD

[Chris914n6]

^^ Yes. Technically a repurposed section from a tire with holes punched in it. Never seem them before but evidently common, as a former Midas Muffler shop mechanic did it back in my RH days. He overruled my plan to use straps over the shield a'la 911.

First pic I found.

[7TPorsh]

So it is not hard connected? is all the weight on the exhaust studs?.

i am thinking the entire exhaust system needs to be hard connected and supported.

[Dave_Darling]

If it gets hard connected, it must be to the transaxle, not the body! (Which includes the heat shield.) The whole drivetrain moves around, and if you solid mount the muffler to the body it will break the muffler, or the exhaust, or the exhaust studs. Something's gotta give, as they say.

The soft mount should support the weight of the muffler, but still allow it to move as the drivetrain moves. Hopefully it's good enough.

--DD

[Chris914n6]

No weight on the studs, it's all supported by the rubber straps. Since the pre-75 doesn't have the body nuts for the bumper shocks, it would be easier to make a support bracket following the factory design. As you would say... hard connected.

Given how rusty my muffler turned out being this was the better choice, and with consideration of future plans.

[7TPorsh]

I'm thinking to weld on a factory bracket and bolt up to the end of the trans. Then run the pipes in and out.

[porschetub]

I'm thinking to weld on a factory bracket and bolt up to the end of the trans. Then run the pipes in and out.

Yep mentioned that ,find a 911 exhaust mount and mod that and mix and match with the 914 one...,cheers.

[7TPorsh]

Well I have decided to go a different route. I am thinking any affordable muffler is going to probably be shot. a good one is $250+.

So going with this Magnaflow turbo muffler. It will be mounted behind the trans.

[don-6]

I have an 86 Carrera Muffler. PM sent.

[7TPorsh]

WHat do you guys do with the clutch and speedo cable? Mine is routed on top of the engine bar but it's rubbing the header now..Also I'm cooking the left side e-brake cable.

Do I need to re-do the clutch pulley somehow?