I Fabricate a 3" Stainless Exhaust for the Mongrel

[@baddaddy8718]

The mongrel is looking even more fun Matt! Will be a handful whatever numbers she gets on the dyno, those poor little rears are gonna need a cry corner once you get to the track

[@uliwehner]

exhaust sounds good. boosted engines apparently like big exhaust without back pressure

[@iancooper5615]

Exactly how i build an exhaust, front to back in sections so that it cant move with stainless contraction 👍🏼 sounds nice. Hopefully you get 300 nags

[@proflash510plays5]

Sweet bananas. Great to hear the Mongrel run again. Well done.

[@chucksterock]

Who knew an exhaust could be sexy?!? Nice work as usual.

[@FabCoUK]

Top job Matt. 🙌🏻

[@adven999]

I had the exact same issues... I have the same saw and blade, I found that if you hesitate with the cut it gives the tips chance to rub rather than cut, this almost instantly work hardens the stainless, you press on with the cut and it damages/breaks the tips which causes the grabbing, and then the blade then burns its way through the bottom edge of the cut. The blade is about done then.

[@mrkonrady22]

I switched to band saw for cutting exhaust parts for this reason, though I love using cold cut saw for mild steel and even big profiles, they are no problem for Evolution blades and there are even bigger quality ones. On the topic of bandsaw, I just bought a cheap 100€ saw and heavily modified it basicaly for free to better support stainless bends and so on. I weld my own band saw blades after buying them for 8€ per metre.

[@butters_]

@@mrkonrady22 bandsaw all day ! sold my chops as never use it anymore now.

[@keithmoore5224]

Same with drilling if you stop its diffecult to start slow and stedy

[@notpoliticallycorrect1303]

I stick to composites for cutting stainless,it just ruins everything else in the end!

[@richardbrowne3641]

Great exaust job! Bang up job! Epic job! Awesome job! 320 h.p. is my guess on the Dyno Testor.

[@333111444333111444]

I always use star gas when doing stainless (Argon, Helium & CO2) with a mig that is

[@N-Scale]

Lookin Fab !!!!!!

[@zeemanjr]

367.7 hp Well done on the build looks mint.

[@tramptruck4859]

Nice work - I was hoping you would share your welder settings. Thanks 👍

[@chrisallen2005]

No point . Every machine is just a bit different between machines, manufacturers and operator preference. Even filler wire choice has an effect on settings. You have to play around to find which settings suit you best.

[@sjv6598]

@@chrisallen2005 you’ll still have to fiddle but it’ll give you a basic starting point.

[@chrisallen2005]

@@sjv6598 1 amp per thousandth of an inch of metal thickness. There!

[@cogboy302]

If the exhaust is running close to the driveshaft CV it'd be worth making sure you have an on-board hand held extinguisher, or a firestick. Me and a mate have a Mk1 Toyota MR2 tarmac rally car, which had the exhaust routed quite close to the RHS inner CV. The CV boot gave up one day and dumped all the CV grease onto the hot exhaust, which set the car on fire whilst driving on the road. Only realised once we stopped at a set of lights and then saw a lot of smoke coming out of the back of the car. Managed to put the fire out, but I got burns on the side of my head & right ear from trying to get in under the car with the extinguisher to put the fire out. Dunno whether it was heat from the exhaust which weakened the CV boot, or it was just old. I'd hate to see the Mongrel go up in smoke.

[@johncoldwell340]

Turbos heat air temps so much as long as the intercooler is big enough you will see no gains from a cold air feed, very different to a na engine

[@single_cam9199]

Your car is flawless

[@brownah]

Matt, at this point you're just showing off with those welds 😂😍😍😍😍😍

[@MidEngineering]

A bit of Jedi welding too - close your eyes & feel the force!

[@rsbharley4766]

Excellent video, thanks for sharing. Cheers

[@gysbertvanderwesthuizen8011]

Very neat,well done indeed!

[@kcribin5654]

Pure talent, right there folks. Cracking job

[@theoriginalwallace]

LUSH! I have this to do all over again due to the V8 replacing the YB! Using the existing centre to rear section, but due to space constraints I've got the manifolds pointing forwards. The right 2.25" manifold will cross over to the left & merge into the left. Then it's into a 3" section between the block over the x-member snaking down, back then right into the original 3" system! Got v-band clamps, pipes, bends etc, but need to get 1 x 2.25" flexi & 1x 3" flexi. Got the steering done & back onto tin work! Cheers. Leigh.

[@RWDcosworthRSTurboEscort]

Exhaust looks spot on 👌🏻

[@kevinhamling1963]

Nice work man. 289 hp . ✌️ Peace from Melbourne Australia.

[@colhonk2916]

Welded lots of 1/16 inch thick ss sheet in the late 1970`s with ordinary mild steel 0.6 wire in a mig, used to weld ok, never broke welds and suprisingly the weld did not rust. rightly or wrongly,Just saying. Keep up the good work.

[@jasonseal2692]

Clean wiring is happy wiring.

[@jimmypratt6450]

Great job , far beyond my skills lol , plugs and points and maybe a carb clean up how things have changed .Top job 👍👍👍👍

[@mrb1864]

That came out nice, really need get myself a tig machine . mig'd fair few exhausts but it not quite the same end result. One thing I do on hangers is drill hole in end of bar flush to side of rubber mount and use stainless R clips through the hole, makes nice and secure and easier fitting in awkward spaces . Can't wait see this mapped and here the power of forced induction . Is an absolute cracking track car in looks and ability ...

[@BarnacleBilltheSailor]

Yep, Stainless Steel is some hard stuff to cut and drill. I find the best result is to go slow and not heat it up too much because it gets harder when you heat it. Also cut off disc on a grinder is the best way to cut SS, I think. Never been any good with a carbide tipped blade on SS as the teeth part from the blade and come flying out at you.

[@sg3260]

Nice work. Few tips, make a few sponge bungs and back purge the welds, yes it will be more expensive but will transform the welding. A longer down slope is better on stainless, maybe 5 secs, although not critical on an exhaust. The foot pedal I'd just use on aluminium, full juice when starting and as the alley gets hotter, lift off as you go for a consistent weld. Just my 2 cents. 265bhp

[@terencehawkes3933]

Pretty weld on that downpipe! Nice looking exhaust system!

[@kevinlyon9501]

Burble burble it's alive, exhaust lots very neat, as always, and a nice snug fit. Power wise at a guess 230 hp.

[@BenRelle]

Like a glove 😀

[@fargogemini694]

You haven’t lived till you’ve changed exhaust to manifold s on hot Mk1 mini twin carbs

[@Finnspin_unicycles]

Lovely work as always!

[@mikesanderson2361]

Admire your work ethic Matt...I reckon somewhere around 290 hp. Cheers

[@trevorjarvis3021]

Excellent work as always Matt, great stuff. Credit to you. ✊👏👍

[@BillyBob-uc9zp]

Well done Mr. Sounds nice 😎

[@cassowaryind]

great work Mat

[@spiroskatsikas]

Two flex joins are needed for movement ,only one will break the exhaust manifold

[@hespie1]

Nice one Matt. 240hp at the wheels.

[@kittonsmitton]

Nice exhaust sounds so beefy sweet welds thats a beast.

[@iandonkin6762]

Lovely work 👍

[@gatti5002]

lookin` sharp !

[@dcallan812]

Nice job 2x👍

[@futten3230]

i can hear the experts in the comments screaming about back purgeing the welds

[@davidlawrencebanks4610]

That's looking great, do like that mushy pea... LAG

[@beezo2560]

That exhaust is beautiful. Too bad it's hidden underneath the car. Sounds good too.

[@anthonybrown7959]

Loving your work 👏

[@theplantpotman]

Love the welding matt, ive got the 355cps great saw if used correctly 😉 when cutting round use the v block! If the blade grabs it!! And at £135 for a ss blade thats no joke, Keep more uploads coming man ! Too long between them, and did i say i love your ss welding 😍 top bananna

[@magnusdanielsson2749]

Really nice work 👍 I did up my exhaust using a stick welder, angle grinder and table sander. Once I figured out how to do (first time welding) it came out pretty good. At least functionally not fir looks 😅 But once I was done I realized I should redo it now when I know how to do it.. Its for my fiero. 1.3m long exhaust with 7 bends and 11 joints 🙃

[@viskanmustapaiev1539]

Bravo.

[@kevinfromdevon]

If you run a bar of boost, it should make between 260 and 280hp. But with the boost control, you can run up to approx 18 psi after peak torque. Which should see you over the 300hp mark

[@davidyates748]

Lovely work on the exhaust Matt. Shame about the hacky wiring on the ECU, I wouldn't be happy with that either! Good luck for the Dyno session, I'd guess somewhere around 260bhp

[@stevegoldsbrough1028]

Try 1mm TIG rods when welding thin material, not 1.6mm ones

[@nickmassey9104]

The exhaust looks and sounds ace .I'd guess around 280 /300 rwhp

[@gregorydobson4307]

Great video. Is it not necessary to back purge the tubes when welding.

[@Urchfab]

If your pumping baby food through it then definitely yes, for an exhaust system its personal preference I guess.

[@53jed]

Try a blade with negative raked teeth. From memory , a negative three degrees against a positive eight degrees on your busted blade. It's a bit slower but much cleaner and shouldn't chip the teeth.

[@speeedskater]

Use a tube cutter, donit takes a minute longer, straight cut every time

[@Earlysport]

No gas purge inside the pipe? I always thought if you don’t this your welds are contaminated.

[@davidcole9285]

Lush job 😍

[@konjiki240sx]

For the cold saw the higher the tooth count the better. You need at least 100 teeth for it to be happy. However I found band saws to be 1000000% better blades last me about 2-3 years.(especially if you use coolant)

[@clivewilliams3661]

What were the actual design parameters for the system as 3" seems to be a bit large and there are no expansion boxes in the system? It would be interesting to see the dyno test results before and after.

[@PyroDanUK]

Does the new evolution saw have the same problem of a crappy clamp on tube that you covered in your video on the old one a few years ago?

[@Sven_R.]

Have a look at your battery voltage- the alternator doesn’t seem to charge. (Nice work btw. 👍)

[@karnesmotorsports]

Idk what it’ll make but save some horsepower for the rest of us! Lol

[@denis9450]

220 BHP regards from Liverpool

[@jonasthemovie]

Some kind of heatshield for that inner CV?

[@bilaltariq7819]

How come no purge on the downpipe?

[@paddyladdd9395]

How come you didnt back purge ?

[@rognevs5695]

267 ponies with a fare wind in your tarpolian brother

[@sjv6598]

240 👌🏻🙂

[@minmog]

What dyno do you use?

[@BlackTownie999]

My guess is 400HP +or- ten HP or so. The exhaust system supports it, Now how about the Fuel and Turbo?

[@sarbec1]

Why didn’t you purge the exhaust when you were welding

[@toxaq]

What happened on the dyno?

[@WatchingMamut]

guessing 210hp at the wheels

[@jagharingenyoutube]

MAP-sensor not connected 😊

[@Olk335]

Maravilha 😍

[@ciatangallaghe2485]

What engine is it?

[@MrWilliam.Stewart]

That's cheating! When they bought the Stig in to drive for James May, that was cheating. When the fabrication Stig gets called in to weld up a zorst, that's cheating too! (Very well done)

[@TEAMVISKAT81]

safe hp i think is 250 max hp 265

[@crazy7023]

ist doch kein wunder das die zähne abgebrochen sind der zahnabstand ist ja auch größer als die materialstärke

[@cliffludo6860]

416 dyno guess

[@tomscustomshop]

I found them saws are too harsh and I use my band saw was best!

[@Garffey]

The exhaust looks (and sounds) fantastic Matt....As an ex-engineer, who did the odd bit off welding I can safely say that's some great weld-porn there!...😍 ....I'd guesstimate your looking around 210/220 bhp?

[@karlkerkhof7966]

298 bhp

[@peterbonnez]

235 bhp

[@TheMrtMts]

260hp

[@davidwoods6821]

i reckon 270 hp

[@tortfeaser]

Sir. Haltech. Do eet.

[@Steviegtr52]

246.

[@butters_]

that’s a nice handy little positioner, homemade ? would like to see a DIY guide on this 😇

[@markrainford1219]

Old rotary table + cordless drill = 🤸🥳

[@HuMaNiTaRiAn1]

282

[@jlauto3461]

232

[@vanillagoose4444]

Not watched in ages, i guess you gave up too, your posting once a month now 🤷🏻‍♂️ content is also not great to be fair, you need to get away from racing shit and more fab ! just my opinion not trying to hate on you at all 😬 Loved you transit recovery truck stuff 👍🏻

[@MrWilliam.Stewart]

Is it metric or imperial guesses? You Brits still talk in American to me. My geuss is 121 wheel kilowatts.

[@muttapha]

If you talk this much in the next video I will unsubscribe bro!

[@haywardsautomotive6156]

See you later. Some of us like him talking thru what he is doing!

[@markhendry1761]

No, you won't

[@vogs72]

Exhaust ooks great, but reminds me why I hate stainless. Engine bays tidy as well 🫡