Rotary Corvette made so much power we started blowing off vacuum lines

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[@nochan99]

Dude imagine I might be able to help you with something! I worked with those pesky quick-connectors for many years and learned a trick or two from the pros; 1. you need a special tool to cut the tube straight and without squishing it at all. If the tube is not cut straight or is ovaled in the cross-section it will NOT seal properly and/or may not hold pressure (i.e. fall out) 2. Push the locking ring all the way open before inserting the tube or else the teeth will scratch the tube going in, wearing it down. A worn tube will not stay put 3. After you insert the tube until it bottoms out pull the locking ring all the way closed. If you don't, it will definitely NOT stay put. 4. Maybe the most important part (which I saw you were missing) there is a clip that you place behind the locking ring, it looks like a plastic C-clip that is there to make sure the locking ring does not budge. I can't tell you how many leaks and problems we had due to those missing over the years! 5. Once everything is in place, do NOT let the tube move/rotate! If you have too long tubes that dangle it WILL wear inside the connector and it WILL start failing! When it fails the only way to fix it i to start over by cutting of the worn part of the tube, starting from step 1. Good luck!

[@xijinpingpong4426]

push

[@gordowg1wg145]

Excellent comments there! 😎👍 The only thing I can add is that when assembling the fittings, with the hoses pushed right in one should use a marker to mark the fully in position - that way if it starts coming out ther will be space between the fitting and the mark on the hose. Doesn't help if it's damaged hose leaking, but if there'sa gap, ther IS a problem that needs addressing, even if it isn't the actual problem being chased down.

[@socks2441]

we use that same fitting at work for manometers, we only use them to read pressures of about 3 psi. i certainly wouldnt trust these connectors on something as important as this car, or for 30psi. edit: actually come to think of it we have a few machines that use these fittings connected directly to the main compressor line, which is at about 100 psi.. i dont understand how a long length of that tubing or that connector seal with that much pressure but they seem to.

[@diji5071]

It's so nice when comment sections become a resource for the OP

[@gordowg1wg145]

@@socks2441 They're a standard fitting in industrial machinery that uses compressed air, but there may be a difference in the quality of the fittings and hoses/lines, as Rob suggested - oh, and the quality of the fitter 😉🤣 Oh, forgot in the earlier post, but while 3/8" and 10mm may seem close enough, ~ 0.5mm/0.020", there's just that little bit of compromise in the effectiveness of the gripping mechanisms if the wrong size(s) are used.

[@ryushi5]

Hey Rob, I deal with those air fittings and hoses all day at work. While it can be a bad fitting, 90% of the time it's the way that the end of the hose is trimmed. Get a razor blade and make sure that the end of the hose is perfectly cut and smooth. That can save you some troubleshooting headaches down the road.

[@colecollett9517]

I have had similar issues too, took me ages to figure it out! Hopefully Rob sees this

[@BeardMan01]

Also, it's good practice to put a small zip tie in the release collar to prevent it from releasing. They make lock clips that fit in them as well

[@funkalicious2002]

I recommend getting a cutter. For smaller vacuum lines you could use a cutter for trimming 3d printer bowden tubes, and it'll make a good, straight cut.

[@liamthehippy]

the HGV industry use these fittings absolutely everywhere, i think they're brilliant!

[@bocarrell7881]

Hope Rob sees this

[@Boostedm3nace]

California - “No mods! Not even a cold air intake!” The Dahminator - Builds a fire breathing rotary swapped c5 😂

[@Matty.Hill_87]

It's only illegal if he gets caught 😂

[@bakedandsteaked]

Commiefornia

[@rahenry00]

@@bakedandsteaked how so?

[@gordowg1wg145]

@@rahenry00 It's what the stupids say who don't understand why they can't do whatever they want to do. I don't agree with all of what the CARB and EPA are doing, but I understand why they're doing it - ask your parents or grandparents about the pollution in the sixties and early seventies.

[@rahenry00]

@@gordowg1wg145 I was referring to the "commiefirnia" statement.

[@jonahfastre]

It’s good practice to put a little mark, with a sharpie or something, on those little hoses that can come loose, so you have a visual indication of when it happens

[@xSupra]

Ye that's what I thought too, but that won't stop the hoses from getting out again.

[@caseymiddleton6878]

I love that your making it as “OEM” as possible lol shit looks funny as hell speeding past with rotary noises 😂😂😂

[@joshuafleckenstein351]

The laugh after “Do Re Mi Fa- Dyno” was hysterical lol

[@mattmannino3674]

I was dying

[@VincentParisien]

Paul Walker must have turned in his grave as Rob passed that Semi while tuning his Rotary Corvette on his laptop... All that was missing was a Japanese motorcycle street gang looking for their 10 second car... Love your videos Rob! You're such an inspiration. Keep it up!

[@ksan351]

Calling it now, this vs that. Rotary vette vs ls Rx7.

[@Matty.Hill_87]

We need to see this

[@under_wraps]

Let me wrap the vette for you!!! Like this so he sees it

[@TheRealBhuado]

Rob is literally the ONLY person to show you where the issue was and how they diagnosed it. HUGE thumbs up for this.

[@Coombsly]

Hi rob, noticed in your video the charge pipe moving a serious amount. I know the joints are designed to allow flex but surely best to bracket that pipe to stop wear and tear. Top work tho, love watching your videos.

[@Oatmealism]

Do you remember when this car was just a situation of 'I want to Rotary to make as much power as the stock LS that was in it'? I do, Not that I am complaining this car is getting the chance to stretch its legs and actually put the power down is really interesting to see how far it can go.

[@craigbarrett2278]

It's what started the Dahm experience for most of us.....😊

[@xXxcastenada]

11:12 cool pipe movement

[@robbertburger9381]

damn Still AWD 4 rotor Waiting room, since Hoonicorn VS world is back i'm hoping on a Rematch :D

[@962RACER]

A shorter rear end would make the t56 a pretty well suiting short ratio tranny in 1st through 5th gears for this powerplant. It being domestic it shouldn't be ridiculously expensive either.

[@yasha1928]

Ps. Go into second gear 1st and then go to 1st gear, stops the trans rotational mass and should prevent your grinding synchro lol

[@bigcountry908]

Only whilst downshifting

[@yasha1928]

@cole wenger no, definitely works during stop and go traffic as well.

[@jsomething2]

that will help, or you know.. just put new blocking rings in the tranny? it's not has hard as any of the other shit they do. could also get a zo6 tranny with the shorter gears. will help some since they don't seem to want to do rear gears.

[@briankuhn7396]

17:11 OK. That got me! 😂

[@marvinzimmermann1678]

I love how rob is tuning his cars himself. Not like other dudes. No front at them cause not everyone can programm. Just want to say

[@andivatar6383]

Cant believe you still hadn't changed that exhaust. I thought you can't resist that sound.

[@Cjbarker2]

Those air fittings have to be cut perfectly straight. There is a cutting tool that makes it easier, but I prefer compression fittings to quick connects every day that ends in “y.” Quick connects are great for stuff that needs maintenance, but if it’s imperative that it doesn’t leak, I’ve never had an issue with a compression fitting.

[@coltonmcrae5873]

As someone that works on air brakes daily, 100%. Compression are a bitch to deal with, but they never fail

[@demonic477]

I know it's counter intuitive to racing but if you have a gear too tall for the engine the trick is to run a heavy flywheel . it will keep the inertia of the engine revving when it gets a load on it like with a tall gear and push thru to get the car moving and once it's going it will help keep it moving the only down side is the engine winds down slower then with a light flywheel. it's the same reason the old battle boat cars with 6 cylinder engines had massive flywheels it's cheap and it works very well

[@funkalicious2002]

How long until you get a different gear for the rear? I feel like that would fix most of your drivability issues.

[@fernandop937]

What rear gear would you recommend?

[@funkalicious2002]

@@fernandop937 I think the Z06 from that era has a 3.42, so I would go with at least a 4.30, or maybe even as low as 5.13.

[@isocuda]

That's the kind of failure that cost Toyota the LM24 a few years back. Questions like "why are we using a $20 fitting on this little thing?" can be replied with how much the hourly dyno rate is, fuel, staff costs, or even a race victory. But this is the fun part of the puzzle that is making cars do silly things :D

[@curtism7203]

I finally know what you car sounds like, Its like putting cards on a bikes wheel and going really really fast!

[@paveldzhurylyuk6076]

Pro tip from a Subaru specialist with no 1st gear synchro, when your in neutral at a stop and want to shift to first, go to second then go to first so the 2nd gear synchro does the work for ya.

[@Wormweed]

Engine sound is much better inside the car than outside. Love the project though!

[@CrunchyMaggots]

I love that the auto-generated caption system labelled the revs at 8:05 as [Music] ... Correctly.

[@jscbmx21]

I’ve got smc cutters for those kind of hoses, they cut perfectly square

[@Ace_AL360]

It's time for a new exhaust for the Corvette

[@jordanburns8975]

8:18 the absolute most devilish Dahm laugh

[@johavenga3535]

"Mr know it all" does it again

[@oscarcastrellon7095]

That exhaust sound makes this car real difficult to love

[@jorghemlein4322]

Take fittings Form Festo and the leaks are history!

[@ExWowas]

Cwn you finally get rid of those hideous blue racing strips on the hood and polish that poor car? It looks scuffed as fuck. Otherwise, enjoying the content since the beginning!

[@GW2_Live]

That is why I don't like push-lock fittings, AN -4 vacuum lines only for me! Way overkill I know, but I never have vacuum/boost problems

[@JudgeDreddz]

I see the black coupler on the intercooler pipe spinning it’s the drivers side one

[@hugojeller]

i need a shirt with "do re mi fa so la dyno" now

[@Jlow67WV]

As others have said, use a razor blade/tubing cutter to cut that tubing. Also, use nylon tubing or DOT certified type A/B. Those will support higher pressures at higher temps.

[@Graphics21]

I seriously cant wait till everything is perfect. Rob your are a mad scientist 😂😎😎👏👏👏👏

[@ClarkBark14]

Food for thought. You do have the capability of machining cap off plugs for turbos/intake pipes that you can tap and plug an air chuck to for boost leak tests. Spray around with a soapy bottle instead of risking engine harm.

[@Cjbarker2]

The turbo inlet is a boost leak if the engine isn’t running. Unless you’re telling him to cap off the turbo inlet, there’s no real benefit to that. However, that’s not a terrible idea

[@ClarkBark14]

@@Cjbarker2 I normally pressurize the system at the charge pipe where it connects to the turbo. Depending on how your valves/rotors whatever are clocked, air will get through unless you plugged the exhaust, but that's not really necessary. If you have large shop air system, you can just crank a regulator up enough for the system to be pressurized despite what creeps through the engine.

[@TheRandominated]

Inb4 Rob buys his own dynamometer to do long-ass steady state tuning 😆

[@limitlessbuilds]

Got to start doing hard lines on your projects! Great problem to have. Haha

[@Joshua-qm2qu]

1:05 bruh that music is alpha af

[@crts1683]

The fact that you have this SO dialed in is MENTAL, amazing car.

[@monke4632]

He’s truly a mad scientist.

[@emilcladoveanu1875]

Beautiful , thank you !

[@brysonfields2284]

Missed you in vegas, but now im watching you threw a window rn! (i like your shirt)

[@socks2441]

there's another season of hoonicorn vs the world. hopefully we get to see the awd 4 rotor rx7 back in action for not that this corvette thing isnt awesome. because it is. really awesome. but i am itchin' for some awd quad rotor.

[@Levibetz]

I was pushing for a race last summer and my car wasn't making boost. Ended up being the map sensor hose had melted on the exhaust so the MAP signal was just totally whacked, and the turbo was struggling to build boost. I ended up overspeeding the turbo and wiping out the bearings. Just swapped it out and there's like .030" of endplay in it haha. All's well that ends well! But couldn't agree more, tuning through boost leaks is a mistake.

[@MrClaypogue]

That dudes facial hair is amazing lol

[@klitorusrhex8354]

You could go to a hardware store and get compression fittings for those lines. Look where they sell the refrigerator or dishwasher water supply lines 😉

[@protodad1]

Duarte. Weird place. I wanted to test drive a bunch of cars (m3, s4, panamera, etc) and they had a car max that had them all. They also has a mclaren and 2x Porsche turbos out front getting appraisals. Salesman said the most expensive trade in was a RR and they cut a $200k check. The nicest car on the lot was a RS7 for $99,999. They auction everything over $100k…

[@johnnycashh7148]

Seeing and hearing it go down the road seems so odd!! It's like your buddy leaning down to grab something and you see the top of a G string!! 🤣🤣🤣

[@ChutneyInc.]

Sounds like Ron has caked Isaiah into more than two rotors

[@joshsaxon4114]

I saw a car on a Dyno in the thumbnail and I almost passed out before I realized it wasn't the four rotor. Corvette is cool too but just not the same.

[@Aradinx2]

Rob you need to start posting some 60-130mph pulls after you get your cars done so we can get a sense of how fast they actually are.

[@mebordernoneya8484]

Watching and listening to that car drive by is like seeing an asian super-model who talks like Snoop-Dogg.

[@DEADPEDAL]

I think you had just purchased this car when Freddy and I were there in 2019. Glad you stuck with it. I absolutely love this thing.

[@venge1894]

This was the car that really got me watching this channel. Its just such a clean engine transplant, and its nice to see some 2-rotor love after all the three and four rotor content.

[@boosted95elantra]

What is your fuel and turbo setup? This is awesome!

[@JpEvoX]

Up to you guys but I'd attach something to the charge pipe so it does move so much under boost lol

[@holdingboost2024]

Had this problem Same Solenoid dealio. But mine is N75 from Volkswagen/Audi. With your MAC real t304 steel adapter ones never fc up. ;)

[@RobertMiller-dh6ci]

That exhaust NEEDS to be changed it sounds like a Honda fart can

[@GoodVibezz93]

You should let a chevy dealer let the alignment do 😂😂😂

[@carlzirbel2860]

If the gearing is too tall just change the diff gearing to 4.11 or 4.5 or so it will fix the problem

[@daviddetweiler7658]

My Turblown EFR 8474 kit says your turbo is laggy. I can make 10 lbs at 2500 RPM. You need to talk to Elliot about a kit and give it a try. His cast internal kit would be perfect for the 10AE. It's the perfect "buy a kit and make power" car

[@mr.k6136]

I've no idea why I but the MTV Riff Raff reference made me totally lose it that was one of the most random things Rob has ever put in a video

[@vegasdriver]

I wonder if a corsa axle back would help with the flow issue. That way you still keep it with the corvette style exhaust but open it up a bit

[@mr.syed_212]

Hey rob, how about a rotary bike project?

[@rsharney1111]

That exhaust is terrible... but everything you guys do is awesome.

[@cncdan1364]

Order those npt fittings from MSC.

[@marktarascio4766]

Putting a drop of super glue on the hose and then safety wiring it will fix hose blowoffs.

[@AlexDeGruven]

The only thing I'd really miss from doing a rotary swap from an LS is the "LS Shudder". It's such a silly stupid thing to be nostalgic about, but it always gave me a chuckle in my '01 Camaro.

[@jsomething2]

what is this

[@AlexDeGruven]

@@jsomething2 LS would always idle really smooth, but every now and then a vibration would develop (I'm not explaining it well, sorry) and you could watch the stick shudder almost like someone getting a chill. It would happen periodically, seemingly randomly, and was only for a moment. You don't even feel it in the car.

[@sberry80]

Love this car. Please do some exhaust work, it sounds like a farty honda with the vette exhaust. Lol

[@Jumpingmeatloaf]

Use nut and ferrules, lines will tear before this style of fitting leaks.

[@JosephWellman]

the only thing I ever have any grips over on any build is the belt squeal

[@timtaylor6147]

You did take a bunch of weight off the front ! Does it still have the leaf spring in front ?

[@timtaylor6147]

You did take a bunch of weight off the front ! Does it still have the leaf spring in front ?

[@MrGrossbaff]

Do ré mi fa sol la Dynooooo , this made my day :)

[@1979augistine]

Dahm it ! put a rotary in it.

[@normanguzman417]

I don't trust houses next to the turbo header. No matter what they are made of hi-temp silicone, or special material. The heat that header generates is much more hotter than a conventional oven. When the hose gets hot (specially on a rotary engine) it gets really soft and that's when issues happen.

[@rbmwiv]

The shape of the car and the sound of the Rotary it’s like looking at a RX7.

[@max-eo9iq]

lol yeah looks like an rx7 from an alternative timeline

[@mhammadalloush5104]

It looks like if the GM Aerovette engine made it into a Corvette.

[@emanh4keem_san420]

The RX7 from another universe Dahmniverse

[@Apexxshock]

Ol Robert Dominic

[@lazy1126]

good lord that pull

[@GeorgeMcNally]

I love it, but it just sounds *so* wrong. Which is exactly why I like it.

[@HalferLandPerformance]

We specialize in Honda Jseries V6 engines and do care about power per psi of boost. Our 06' Accord 6spd coupe J35 custom turbo setup on a 6968 Journal bearing Turbinetics turbo gained 35whp per 1psi which is INSANE. Good rule of thumb is a healthy setup will gain 20ish whp...ours did 35whp 😎 We have a Dyno video on our page

[@andrewjweaver]

On the MAC valve hoses, you could draw 2 lines on the hose with a sharpie such that if you see 1 line you know it's seated, 2 lines and you know it's not. I'm interested in the gearing. I want to see what a good street-able first gear ratio is for a 2 rotor with a modern big turbo. The OEM Mazda first gear is way too short.

[@ICKY427]

jeez how much power could you make with just ONE rotor? 300 would be dope in a miata

[@1MBStudios]

Team boosted has a few videos on a turbo one rotor, you should check them out

[@nagizah8]

The law says you can't text while driving, but it says nothing about tuning your car while driving

[@austinclifford4511]

I think you really need to go something about that exhaust. The drone is lethal...

[@Sauerbrew777]

Isaiah needs a shirt that says "This is what peak performance looks like" with a picture of his RX-8 doing a burnout!

[@Matty.Hill_87]

I'd buy that

[@ax75f92]

Time to toss those refrigerator line fittings and go AN

[@pahlsun216]

*check engine light on* Rob Dahm: "This little light of mine, I'm gonna let it shine"

[@everettbrooking710]

Perfect time to stop studying for 21 minutes.

[@jesseselinsky6535]

That’s why I Used PTFE AN lines on all my vacuum for everything

[@jvepps]

U don't blow vacuum lines off with power. You blow them off because they were installed wrong.

[@ArthurSperotto]

If that's a standard T56 trans, a set of 4.10 diff gears goes wonderfully with it :)

[@yutub561]

Get some swagelok fittings for your Mac valve. Best of the best

[@jenibond]

I know this sad but girl of the 80's my brothers away had the A team , Nightrider or Airwolf on You need red light like kitt as it all black out !! But instead of back forth red light like a piston could you make a triangle go in a circle like Rotary shape !!! love jeni xxx

[@Iesmi840]

Rob i NEED a grey d🔺️hm shirt 🔥🔥🔥

[@anthonyciccariello8089]

3:17 you should make one of those gated shifter plates like in your Lamborghini.

[@Jcarney87]

Episode 49 of telling you switch that rear gear before you smoke your clutch constantly slipping it