Making ANOTHER exhaust for my aircooled Porsche 911

[@all-flat-engines]

One tip for your exhaust headers, if you wrap them in heat insulation it makes a pretty noticeable difference in sound

[@edwardhawken8897]

Of all the KZbinrs I follow, from lads on council estates in the north east of England through to Aussies and Yanks, I have to say you were pretty low on the list of who I’d expect to use the phrase “raw-dogging” 😂😂😂 love it, great work and great to see Harry getting some love again

[@JuergenGDB]

It's never too loud. Nice RSR build. Love the colors, rare.

[@alastairwatson3201]

It’s just like when an old favourite character revisits the set of a show s/he left ages ago and does a cameo!

[@stevenault6256]

Your going to get a lot of heat from that muffler and it may cause blistering to that orange paint over time , I have a 58 custom beetle that I lined the inside area with a product from Eastwood that helps as a heat barrier, after 40 years of being around these cars I've seen them over a period of time fade or blister the paint from the exhaust heat when we shove after market headers and mufflers in that area, when it gets to be 85 to 100 degrees outside I'd keep an eye on it

[@holdencaulfield1001]

I was pleased you could succeed with the exhaust with so little complication, Jeff. It’s great when you can have satisfaction without countless hours of toil. I’ll look forward to how the car goes on the Adelaide trip.

[@cam3002]

Looking forward to how it sounds on an extended drive, I've been thinking about doing something very similar but always ran into space constraints, thanks for showing the way!

[@graemeburnham1208]

Jeff no matter which way you go to Adelaide, the roads are in a huge mess, and cars with low profile tyres and mag wheels are being damaged every where Those without spares are ending up on tilt trays and are undriveable till tyres can be found and or wheels replaced, so be careful and be aware. A space saver may be very handy. On the Hume last week there were several cars in the one spot all with wheel/ suspension damage, after hitting a hole. Travel safely .

[@wiskunst]

You will have the best of both worlds with a calculated helmholtz resonator on the old (v3) setup. I’ve made one for my Lotus and the results are incredible. I can help you with this if you like.

[@gazzafloss]

No doubt about it Jeff your old 911 Harry is a neat looking machine. Hope your new exhaust system lives up to expectations. No fun doing long road trips in "cool" cars that rattle your head.

[@markstevens6002]

Hey Jeff, that exhaust looks AWESOME 👍

[@mackellmo1083]

Looking good! Hope it works out for you. Safe trip

[@K_Grude]

Concerned about road clearance of the silencer (muffler). Also the heat from the silencer may damage the paint on the bumper as it is so close.

[@marcmigneault8364]

Please, give us before and after shots so we can hear the difference. Keep up the good work!

[@glensgraphix]

OK, I'll be first to say it, how low are those mufflers to the ground? The camera angle makes them look looow. Also the heat from them on the fibreglass. Again camera angle may make it look like it's too close. Good luck with the Classic Adelaide Rally. It's a great event. I went to the early ones when I lived there.

[@HomeBuiltByJeff]

They actually have a heap of clearance ;)

[@glensgraphix]

@@HomeBuiltByJeff thought so :D

[@mfl950]

Be careful driving west to Adelaide, flooding along the Murray causing significant issues .

[@peaktraveller]

Good luck. Hope that is an effective fix.

[@hugogreen4916]

I recall back in the day there were German shops - RuF- ?who installed baffles that you could remove with a screwdriver from the exhaust pipe.

[@HomeBuiltByJeff]

I actually tried some of those but they didn't do anything on Harry

[@stevenwest1494]

I can't help thinking that droning sound from the exhaust might be from the lack of sound deadening. It might be panels vibrating causing that tone. I watched your 911 sound deadening episode and notice how you didn't totally cover the bottom or rear firewall in the Dynamat like product you used for the Alfararri. Oh and I hope you haven't lost as much getting clearance from the low slung exhausts now. Have a great trip and safe journey.

[@HomeBuiltByJeff]

It is definitely not the sound deadening as I have full MLV and get no road noise. I recently went on a run with a bunch of GT3s and all everyone could hear was my car as it drowned them all out.

[@Willsy161z]

Have you tried Helmholtz resonators so you can keep the volume and note but remove the resonance drone at cruise

[@jimmypratt6450]

Cutting them curves is a clever bit off frabricatoion, thinking out off the box👌👌. Thats what i do day to day in my small bodyshop 👍

[@mrh6577]

I love the car and all your work. However, I’m not quite sure about those back boxes?? They hang down miles too far and it looks a bit odd?

[@AW_DIY_garage]

Nice raw dawg welds there!

[@jamest5149]

You could have swapped over and put the muffler inlets on the outside and had a ‘GT3’ type centre outlets 🤷 Will be interesting to see if you have ground clearance issues.

[@graemeburnham1208]

The Sturt Hwy east of Hay is under water so Jeff you 1300 estimate of distance may be a tad short

[@isickofit]

Sounds right.

[@mrcaps1971]

There's nothing refreshing driving the Hay Plain to Adelaide. Safe travels. Enjoy your road trip.

[@gazzafloss]

@mrcaps1971, a mate and myself did it in mid summer 1967 in his brand new 1967 Cooper 'S', never had the speedo below the 100 mph for miles and miles. The Hay Plain can be brutal, but not many "speed demons" were working that stretch then. Today, nah, don't think we'd last more than a few klm.

[@sonyhk3824]

Well done mr Jeff 👍 💯

[@danielprivate7442]

I've lost count...is this exhaust number three or four? lol Hoping to be "refreshed" after an 800 mile trip in a classic 911 is folly. The best you should hope for is not being completely road fatigued. Harry is a born and bred sportscar. You can't fault him for not being a GT. Have fun on your trip.

[@blackbuttecruizr]

Great work. Do the mufflers not get hot enough to melt the bumper? I would be worried they would, especially in slow traffic.

[@dra911]

I hope it works out for you (in terms of noise) - but they sure do seem to stick out like a set of you-know-what, even from that high camera angle. I wonder if a coat of black paint on the body of the mufflers could help conceal them a little? Just an opinion of course, like everyone else. Carry on! 🙂

[@eslai]

Yeah, that's my only concern as well--they seem to be very visible, and the tips look rather long since they're so visible from the top. It just looks like the whole thing should be stuffed up by like two or three inches, but I do realize that there's no room. It's strange, because I know they're as close to the bumper as possible, but because the bumper curves inwards, the tips looks especially visible when seen from standing height I guess.

[@kerryclark1926]

Two thoughts. 1. Will the mufflers heat up and damage the rear bumper? 2. Can you paint the mufflers with a high heat black? Or do you want them gray? Harry looks cool every time I see him.

[@ilyafr86]

sounds great!

[@Sloae101]

I work the Adelaide rally each yr should be good to see u compete in it

[@HomeBuiltByJeff]

I am in the Porsche club tour. Looking forward to it :D

[@Sloae101]

@@HomeBuiltByJeff well u will still have a ball we run a enjoyable rally

[@MassageWithKlay]

Nothing like wrapping up stuff just before an event ... You're becoming a true race car owner :D lmao

[@glennarnold3970]

Jeff on your original muffler you took off all you needed was a j pipe welded in behind the muffler to get rid of the drowning noise there are how to and lengths on the internet for this just drive the car get a noise reading when it drowns and the equasion will tell you what size pipe and length to make the j pipe then no more drowning noise when travelling cheers glenn

[@HomeBuiltByJeff]

It was not just the drone. It was also far too loud in general.

[@glennarnold3970]

@@HomeBuiltByJeff what a porsche to loud you must be getting old jeff you could have put a turbo on it that would quiet it down 😁

[@HomeBuiltByJeff]

@@glennarnold3970 Haha. With the compression I am running a turbo would quiet it down permanently.

[@crabapple1974]

Really liked your video installing noise-damping on the ferrari. I see lots of KZbinrs (also BOM/Binky) not using the massloaded vinyl/foam on top of bitumen. Having worked with sound insulation for audio applications it makes total sense to have foam on top. Do you have anything on top of the bitumen in the 911?

[@HomeBuiltByJeff]

Same stuff ;)

[@danianstaffen4428]

Howzit Jeff love your work really love the channel... Just a word of advice as I've tested so so many mufflers... Those triple flow style or (turbo) mufflers absolutely kill power and flow...there are mufflers out there that kill sound without killing so much power... Just my 2c worth... Love the 911 though

[@jakeg1967]

I'd love to hear which ones you think work!

[@enricodigenova8112]

Enjoy your trip mate and stay safe 👍👍

[@cocos.]

One of the Top german Porsche Tuner spend a lot of effort not to mix the two banks

[@bensouth1667]

Will the heat from the exhaust not bubble the paint? Had that on a lotus where the exhaust was very tight with the engine in the back

[@ryanmcneill7492]

Sounds nice 🎼

[@AgentShizzle]

Raw Dogging Jeff ? nice

[@glensgraphix]

I thought the same lol 😂😂😂

[@namtek1]

Wow, I wish I had half your skills. My 911 has been out of commission a couple weeks now due to a fuel issue.

[@motorbikeadventure-mbadv]

Did you consider to paint the exhaust black?

[@lanceboyle4255]

Recreating the heater boxes around the headers next?

[@Steve-jq4st]

I’ve got a 2007 Boxster s and the standard exhaust is loud enough on a trip of more than an hour. Why you would want it to be any louder is beyond me. I’ve got tinnitus which is always worse after a few hours.

[@HomeBuiltByJeff]

I recently did a drive with a bunch of GT3s and my car drowned out everyone elses. Definitely was too loud ;)

[@alanstuffo155]

Is time to put expansion muffler at 4 time engine . Make

[@nickmassey9104]

Great to see Harry back .Jeff you've invented a porsche version of a vw type 1 empi dual quiet pack exhaust for the 911 😅🤣 1 question .? your views on exhaust wrap thanks

[@HomeBuiltByJeff]

I use it where I need it.

[@SkylarkCamperAdventures]

As mentioned by someone else, will you not need to clearance the bumper from the exhaust?

[@glenns2801]

Mate just make sure you aren’t going to have issues with the heat of those mufflers so close or touching the rear bumper

[@HomeBuiltByJeff]

They still have an air gap and I happy that they will be ok :D

[@glenns2801]

@@HomeBuiltByJeff all good just looked super close in the video and hate to see it cause a problem.

[@colinartus1897]

Shouldn't you be back purging those welds? Maybe save that for exhaust version 5.

[@HomeBuiltByJeff]

I talk about why I don't waste gas back purging in the video ;)

[@jimclarke1108]

Is it a bit exhausting, Jeff

[@cam3002]

Please share the dimensions of the pipes and mufflers. ID of the pipes and OD of the muffler case. Thanks in advance

[@HomeBuiltByJeff]

Mufflers and pipes are all 2.25, and the mufflers are 14x10x4

[@shonuffisthemaster]

nice work but i really dont like the way they look, they are far to obvious from any back angle. the already somewhat chunky ass of the porsche looks even more chunky, looks like its got a diaper on now. i get the space constraints and what you want to do sound wise, but sometimes you just cant have everything you want

[@matthewviviano3653]

Looks awfully close to the ground. How much clearance is there?

[@grouphistorics138]

Raw doggin’ it 😂😂

[@honestpat7789]

Odd seeing mufflers sit out like this. Might be limited crossing gutters or going up/down driveways 😮

[@HomeBuiltByJeff]

It is actually about the same height as the previous one, and there is heaps of clearance :D

[@honestpat7789]

@@HomeBuiltByJeff it’s also, at the least, twice as wide 😉

[@1one3_Racing]

Are you doing a lap of The Bend on the way past?

[@HomeBuiltByJeff]

I wish, but not this time :(

[@harryfahrtdenwagenvor5202]

Have a nice trip there in the middle of nowhere 🐞👍👍

[@88Frank]

I love that you do everything yourself.... but in this case I think the massive boxes take away from the look of the car. I'd be calling the experts on this one

[@totallmayhem7423]

Hey, I'll be at the Strathalbyn lunch stop on day 3, 27th. Any chance you will have the Datsun t-shirts for sale?

[@HomeBuiltByJeff]

Come and say hi. Unfortunately the mech is all drop shipped, I don't actually hold any of it.

[@gtr161]

Just watch the flood water, the Hay Plain is a lake atm

[@jeremyfaint5291]

i missed mrs jeff !

[@pascaljeske7307]

I Love Harry it's a so very nice car but the old Sound for me was very better 👍❤️👍

[@HomeBuiltByJeff]

Maybe on video, but now the exhaust actually sounds smoother with the crossover.

[@alanbuckingham8788]

@@HomeBuiltByJeff I built a crossover exhaust for my 997 turbo. Okay, turbos make the car sound very different but the crossover design gives a much nicer sound at high revs.

[@brentgordon8769]

Hay Jeff didn't you do this type of exhaust on the 911 before???? What going on. Brent Gordon of Canada.😵‍💫🚗

[@HomeBuiltByJeff]

No, different again ;)

[@hifiandmtb]

Those mufflers are simply too big & obvious for that application. As stated by others, chose your route to Adelaide carefully!

[@1one3_Racing]

Modified 911s all had exhausts like that in the day. Most had cut bumpers to fit them. It's a classic look before everyone went with the stupid sounding wet fart straight pipe idea.

[@bentandre5524]

not sure if i counted right...exhaust no 3?

[@HomeBuiltByJeff]

4. ;)

[@Bobafixit]

Great work Jeff. I’m looking forward to seeing Harry in the flesh in Adelaide….. will Mrs Jeff be there as my wife wants a selfie for instagram 😂📸

[@HomeBuiltByJeff]

Mrs Jeff won't be there this time unfortunately.

[@Therealstubetube]

Love the car, but those mufflers look awful sticking out that much. You need a smaller pair.

[@jdmfreak22]

Gotta be honest here. I don't like how it looks. Isn't there any way to fit a quieter exhaust, that isn't so "in your face"?

[@plus790]

At the risk of commenting only 2 minutes into the video, I hope you put a remote valved system in.

[@peter-fuppe-fuchs]

4 heaven sakes..... It's a Porsche 911....... Get rid of those mufflers, it's supposed to be loud 😉😉😉

[@racingfortheson]

Looks like it has a full diaper 😂

[@brunojanz]

Hi Jeff, I just realize with this video that your nice Harry does not have a LSD ! If you race your car this should be a must have 🙂

[@HomeBuiltByJeff]

I don't race it but an LSD is on the list

[@michaelpring8748]

First🇦🇺🇦🇺🤘🤘

[@chrisoo8998]

Geez they don't give u much room to fit. so tight

[@francescotrovato4340]

Primo😁😅

[@Markjogo]

Nice mufflers. Jeff … but I bet you they bottom out .. and you rip them off or bend them 🤔 … 😳

[@HomeBuiltByJeff]

Nope, they have the same clearance as the old one ;)

[@stephencurry8552]

A couple of ways you can tell sure you are getting older. Though you are also more intelligent. You get excited when you purchase a new washer/dryer. You decide to spend even more money and you quiet your exhaust and add quiet dampening material despite the weight increase and the resultant three thousandths of a second it cost you.

[@ezacher4634]

Looks like it's really low.

[@mitfreundlichengrussen1234]

Erster