CUSTOM Porsche 997 911 Turbo Exhaust Install - Then THIS Happened....

[@josephpressinger1525]

The craftsmanship on those exhausts looks insane 💯 2:43

[@adcampo7601]

Those welds look amazing.

[@666sledgehammer666]

your the kind of uncle that all kids want !!!

[@matt13ross]

Haha that's very kind!!

[@marcosguzz9610]

That exhaust its like a peace of art.

[@matt13ross]

Sure is!

[@josuegarcia6843]

Nah

[@MarcoDambrosio96]

Well i guess my lunch break starts right now

[@buggersunboxings4650]

Yeah. Same. Was looking for something to watch sitting in the car at lunch. Saw this. Win.

[@Iridtube]

It's not a prop valve issue, as those don't adjust the pressure to a vehicle's front wheels - just the rears. And a 997 turbo does not have a prop valve; it has distribution built into the master cylinder (featuring two output lines feeding the abs block). It'd be odd to have your issue stem from the master cylinder, as if the piston is releasing for the rears it's also releasing for the fronts - so it'd have to be some super weird failure mode. I would bet it's in the abs block activating when it's not supposed to, have you tried pulling the ABS fuse and driving around to see if it's still an issue? I would start there.

[@matt13ross]

I'll try the fuse. Thanks!

[@cliveargyle5237]

Time for a new master cylinder, front left is the nearest.

[@DennisLoughary]

Love to see you taking the time to include the little man. Those are memories he and you will never forget 👍

[@pcar928fan]

Dude, cold slicks have zero traction and are easy to spin. Hard to get enough heat in to a slick on the street. Once they are sticky they sure are fun! Great job on the car!

[@matt13ross]

Oh that makes sense. Lol I'm dumb

[@marklengal9990]

Great to see Hoyt getting involved. Teach them young and they will never forget it

[@gmanglenn1]

As a dad and we’re recently a grandfather I really like the kid who is helping you just great

[@chrishaug]

Awsome work! A tip for the dji, Drill some small holes and stick metal rods in and glue like crazy. It Will stiffen it up

[@marshman997]

Sounds friggin awesome. I get my 911 this Saturday!

[@matt13ross]

What model???

[@markevo1974]

I would bet the abs hydraulic module is causing the brakes to stick, check the lines coming out of the unit itself for fluid flow. master cylinder is also possible, swap the components of your yellow turbo to isolate the problem.

[@gregglen-hoodedratmedia]

Hey Matt, good job on everything done so far, the problem at hand could be master cylinder and or ABS problem with sensors etc. Just have your mechanic buddy diagnose it for you. Cheers man

[@ronniejarvis2679]

That dude’s exhaust work is art

[@alhuegayle7550]

The JChutch exhaust are the best. I have the same exhaust on my 997 turbo but with titanium tips which gives it and even more exotic sound. Worth every penny. keep up the awesome build.

[@TomHamilton-rg7cp]

Seems like you have a residual pressure issue in the front brake system. I don't remember what all components that you changed but places to look and consider are the master cylinder, flex lines (don't reuse the old ones) and ensure that the pistons in the clalper are able to slide in and out easily. Clean up the bores and the pistons so that they don't have any corrosion in them and use some lube as you reassemble. If you change out the front flex lines for some new ones, do the rear too.

[@matt13ross]

All lines replaced and calipers rebuilt.

[@TomHamilton-rg7cp]

@@matt13ross then you are onto the master cylinder. Maybe something strange is going on inside that's keeping residual pressure on after you release the pedal. Perhaps the seal has gone bad in the cylinder bore for the front section and the seal for the rear is ok. Otherwise, you would have the rears doing the same lock up. Stranger things have happened. If my memory is right on the caliper rebuild that you did, the pistons and bores were in nice shape...only needed new seals and boots.

[@zachmoffa4091]

Had Josh's exhaust on my 996, so much turbo whistle. Crazy nice stuff.

[@stevereno6799]

Sounds terrific! Not too loud, not too quiet...goldilocks!

[@charha01]

Don't know if these cars have proportioning valves in the braking systems, but if they do, I'd check that. Also, might be something to do with the ABS system so I'd check there as well. Since it's impacting both front brakes that's where this is coming from. If it were just one, then I'd say you have a bad caliper and recommend replacing it.

[@VuBeClan]

Time for a Hybrid Turbo/Turbo upgrade. It's 100x better than any other 'exhaust' or whatever upgrade, also tuning it should be fun!

[@dubzstylerc9580]

So here’s the thing about DJI years ago they used to be terrible for charging a lot of money for repairing their equipment but these days things have got a lot better as in that most people used to go out and buy the warranty from DJI now it’s gone the other way where it is now cheaper to send your equipment to go and get it fixed then to actually have the warranty so don’t be worried about sending it back for them to repair and the reason I say this is because most of the time they don’t bother repairing it they just send you either a reconditioned unit or a new one and just pay for the repair, so don’t be worried about doing that but being that you’re really hands-on and you love repairing things yourself. It is fairly easy to buy these parts off of eBay and your generally find that Ebay is littered with them. But one thing that I will say being that I repair Dji drones and gimbal that I buy for myself and sell on, or at least I did before Covid hit , if you buy the outer casing parts for this gimbal make sure to buy the ribbon cable and the power cable as well because if you’re not careful when taking this apart the likelihood of you breaking one of these cables is fairly high so for that reasoning, it’s probably easier just to send it back especially if there’s other marks on your camera unit , as to buy the parts separate will cost far more than if DJI was to supply the parts to do the repair , but as always keep up the good work and I hope this information helps

[@maxboost259]

No one does a better exhaust than Josh

[@Bandiet-ne3zb]

Now that,s a exhaust, wauw its a beauty, looks very nice 👍

[@viktord5275]

It’s a brake master cylinder. Had the same problem on my bmw. Good luck

[@dailydriven991]

Damn those welds are pristine.

[@thesearch9048]

The exhaust looks and sounds amazing! Hopefully the brake fix is something easy (master cylinder perhaps?). Always look forward to your Porsche content. Really interested in a 996 Turbo & 997 Turbo comparison vid!

[@whileyoureinthere]

Unbelievably good looking and sounding exhaust. Very well done. As for the brakes.. gotta be either the master cylinder or the ABS system. I'd start by digging into the ABS.

[@eduardlast23]

That exhuast work looks like art bravo

[@rueliotube]

My 991 requires special LV (low viscosity) fluid. Not sure not using that would cause this issue but worth using just in case.

[@pauldavis7429]

Most likely the booster is causing it. Next time you drive it take a spanner to unbolt the master from the booster and see if it releases the pressure to the front brakes. If it dies it's the booster holding them on

[@craigsmith1354]

The pistons in the calipers expanded due heat they may need thermal protection the piston seals. I'm not sure your piston bores are scored in one caliper yes but both not so sure . Proportioning valve not sue that would be an issue up front but you did have the car exploded so maybe? . These are things that come to mind .... recheck ..

[@pollatso]

Angel 👼 sounding artwork that exhaust 👍👍👍👍👍great content 🙏🇬🇧

[@quickliqproductions]

You should start diagnosing the master cylinder or ABS pump.. I suspect the ABS pump with intermittent failure..

[@mattandrickadventures8416]

It sounds so good without cats and mufflers..basically straight pipes. Lol

[@patrykrusin2501]

At least the engine is safe, take care.

[@yurcivicsux2245]

Sounds amazing.

[@greatenigmus]

I had this happen to me in my supra and it ended up being my brake booster.....not necessarily saying that's your issue, but that is what happened in my experience.

[@davidclarke7728]

Quality work

[@BMWorks_NL]

Still driving it without fixing the paint on the contact services of the calipers 😉🤪 Maybe fix that first before next mods. Keep up the good work

[@matt13ross]

Maybe I did 😊

[@BMWorks_NL]

@@matt13ross nah 🤪🤪

[@guydontas5040]

Genuinely look forward to when I see a thumbnail with the chalk grey 997 👌🏻

[@DaytonCarCare]

That sucks on the brakes. I hope you figure it out. Of all my 30+ years of working on numerous types of cars (most of them German) I've never run across that issue.

[@bobthebroken3773]

ABS pump? Or maybe master cylinder are my guesses. Having your nephew help you brought back lots of good memories. I have 7 nieces and nephews and used to get them to help me work on my cars a lot. My oldest nephew has become a better mechanic than me! When my niece was 9 months pregnant she had a fender bender- I told her she did it, she can help fix it. We did the repair in the driveway and I am sure neighbours and people passing by were shocked! lol. Look forward to seeing Hoit in more videos

[@carlosedu9224]

As ABSOLUTELY ALWAYS, HI MATT!!!!!!!!!!!!

[@danielharding654]

Are the disks definitely in the centre of the callipers? Only thing I could think of is one side is too close, pads are binding and the heat is causing the fluid to boil and lock on. You could also try pulling the ABS/PSM fuse to rule out a pump or PSM issue. Most likely master cylinder / booster diaphragm / misalignment of master cylinder pin if that all checks out.

[@matt13ross]

Yup everything seems good. Just after driving a bit they stick

[@danielharding654]

I’d definitely check the master cylinder arm is seated properly in the brake booster then. That’s the only other thing I can think of. Your car is looking great, great choice of colour. You’ll love it once it’s up and running, have never regretted getting mine. I’ve only had to do servicing, PCM+ and coolant pipe pinning on mine though. Nothing like what you’ve had to do!

[@miguelcollado5438]

Brake Bias adjustment needed? Wish i could help, awesome build so far and thankfull you have posted these videos.

[@MRBRENTHOWARD]

Is there a separated module for the front since it's awd. Try pulling a fuse and see if the module is doing something wrong?

[@jjoneking2117]

I think you need to change a proportion valve that’s why you’re having breaking problems

[@esteban8681]

Salute to Hoyt.

[@james94582]

Need to get a Porsche project to work on little by little with Hoyt... Then it be his first car once he's ready to be driving...

[@matt13ross]

He wants a Cummins lol

[@therowyn]

Think maybe do a seal kit on caliper or braided hose, not sure if you did this already , or the pads are slightly think , with the disks etc hopefully this helps, worked for Porsche since 2000

[@matt13ross]

Rebuilt the calipers and lines already.

[@josephpressinger1525]

13:58 Is there a front rear brake bias “thing” that requires adjusting? It was a track car after all so maybe previous owner had the bias set up differently to stock? Either that or maybe the callipers themselves have a blockage inside (maybe they accumulated debris from sitting in the body shop for so long)?

[@matt13ross]

Yes, I may need to adjust it. Thanks!

[@josephpressinger1525]

@@matt13ross looking forward to the next upload!

[@AtownCangri]

Bruh... This man makes car jewelry 😍❤🔥💪

[@kallefleck8717]

U need to do a bleed thru your OBD Scan tool if u have let air in the system .

[@matt13ross]

Seems to have no air at all

[@coolcolschannel8773]

Very smokey on starting 😮

[@snolvr100]

100% normal for a Mezger. In other words they all do it occasionally

[@sphiwe.maphosa]

bro i’m so obsessed with your background music that you played at the beginning of your video! 😭🔥

[@andreafilippi5243]

psm light is on, i see. for first fix it ,the psm system work also with abs pump and it could cause problems...

[@matt13ross]

Yea it's been on the whole time. I'm not sure why yet.

[@tl2bros258]

Same braking issue I had on my m5 and it turned out to be a bad master cylinder.

[@FrancoisVlog]

Mat , my personal opinion is , that you have brake pressure problem in your brake lines. How the brake fluid come out under pressure...

[@benrambow144]

When does Hoyt’s first car build start? You should make a poll on what to build!

[@matt13ross]

He wants a Cummins!

[@sho92]

Maybe a new master cylinder is on the menu?

[@StraightLineCycles]

proportioning valve

[@user-ub1nm3sq1u]

Hi Matt! I've always wondered what did you do for your main living before KZbin?

[@mattandrickadventures8416]

He looks like a police officer. Lol

[@fernandovaca7970]

Are you planning on upgrading the turbos and maybe adding some tunes?

[@matt13ross]

Maybe!

[@007clownfish]

That exhaust is amazing. How much more is Ti and Inconel?

[@matt13ross]

Send him an email!

[@paddyfriend3999]

My brakes did this, needed new master cylinder.

[@jeanfrancoismenard705]

Yo Mat 2 things why is always un puff of smoke each time you start the car ? It look blue on screen... About the exhaust are you able to told a range of price for the kit ?

[@matt13ross]

Send him an email! Not sure on smoke yet

[@calsin3280]

Car is coming along nicely. What wheels are they?

[@matt13ross]

Tra Forged track wheels. Not the permanent wheels though.

[@jimherrmann9839]

Brake booster push rod length is missing adjusted

[@matt13ross]

I'll try that!

[@marklengal9990]

Sounds great. Nice little turbo sound. Did you go catless? I did that in my g35 but the drown was terrible.

[@matt13ross]

Yup catless. But the turbos keep the noise down.

[@samreye1]

The brake pedal pin clearance to long it keeps the brake applied, or abs pump solenoids stuck.

[@matt13ross]

That may be it!

[@nickgeorgiakakis7249]

I've noticed on a number of videos that there's a bit of smoke on startup, is it an issue like bore scorring?

[@matt13ross]

Not sure yet

[@raymondgrieger9267]

Yip that’s exactly what kids do 😂😂

[@yamen_aly]

Maybe the abs is sticking

[@coolcolschannel8773]

Is there not a compensating valve for pressure distribution? Or maybe air lock in and pump ,did you pressure bleed brakes?

[@matt13ross]

Yup pressure bled

[@jerehada]

Hate to say it but seen a few times the 7 puffs a bit of start up white smoke 🤔.

[@matt13ross]

Haven't looked into that yet

[@aaronf4201]

70k nice one!

[@matt13ross]

Thanks!

[@nimaparsizadeh8072]

Matt are you going to address the smoke on the cold start?

[@matt13ross]

Eventually

[@najuad]

Is your engine oil level too high? That would cause the smoke on first start. I know the 996 doesn’t like being full, 2bars from the top is the ‘recommended’ level. Also check your boost hoses to see if they’re collecting any oil.

[@Perceni]

I have have several Porsches and they all have that issue if they sit too long.

[@najuad]

@@Perceni strange that my metzger engined turbo doesn’t do that unless over filled. M96/m97 yes.

[@matt13ross]

I'll have to check the oil level again.

[@kidnplaye4630]

To nice to stick under a car Jewelry is what comes to mind

[@tomburns890]

Were those 200 cell sport cats on the old exhaust and if so what brand?

[@matt13ross]

They are from AWE.

[@Mohammad_E89]

I guess brake pressure regulator is bad.

[@gouldnj]

Did the previous owner put a brake proportioning valve in the system somewhere that could be set too much to the front?

[@matt13ross]

I certainly haven't seen it

[@karl-heinzheuser2281]

Check the brake hose, sometimes they swallow inside and lock the brake. Exhaust is insane !!

[@coolcolschannel8773]

Any cats in as seen O2 sensor holes but no bulge in pipe for cat?

[@matt13ross]

Nope

[@ts6141]

I've bled brakes a lot and had an issue on my BMW where the front driver kept locking up, I took it to a shop and all they did was bleed it, so some air was stuck somewhere is my guess and maybe your issue as well.

[@jdmjunk]

Is the exhaust resonated like your 996 or it has cats?

[@matt13ross]

Same exact unit as my 996

[@kokkolollo]

70K 🤘

[@matt13ross]

Thank you!!

[@redzone5655]

Stuck booster or master cylinder clogged.

[@rwscarlett2958]

Let’s call the exhaust trombone

[@BashOner]

Nothing will get done now that there’s a new upload.

[@pauljoyquilter359]

Could be the master cylinder, is it air locking?

[@pauljoyquilter359]

😊- or are the seals in it correctly in place. Have seen them in backwards once and it caused this type of thing.

[@matt13ross]

Air locking?

[@pauljoyquilter359]

@@matt13ross where the master cylinder can’t vent so as you press on the brake pedal it applies the brakes but a vacuum is created which holds them on.

[@Onlooker71]

I’d verify that you used the recommended brake fluid. I’d also check the caliper slide pins and make sure they’re lubricated and working properly. Hope it’s not the ABS system itself!

[@matt13ross]

Calipers rebuilt and lubed. Proper fluid too!

[@hornhospital]

Proportioning valve problem?

[@spoons6728]

Are the hard metal brake pipes crimped at all?

[@matt13ross]

Nope.

[@Emerica-wp9ch]

How was the drone on the inside?

[@matt13ross]

Well hard to tell with windows down. But so far, zero!

[@koreycarlson3309]

Oh no, Hoyt has unlocked master level Lego building of Porsches early in his life journey. Matt, kudos; this is the way.

[@matt13ross]

It is the way!!

[@dyi01]

I would wager to guess you have some kind of brake master cylinder issue, or maybe a brake proportioning valve issue.

[@976darkboy]

Not the first here today, but glad another 997 video's out!

[@calli1993]

Your nephew did most of the work! Getting lazy, Matt!

[@matt13ross]

Haha I was hoping no one noticed!