My Car Is A Roller Coaster Of Emotions

[@gregmiller3132]

Just got to say that I have been a long time fan of this channel! I successfully turbo'd my 1990 1.6 motor and she's been running strong for well over 10k miles since the upgrade. Thank you for everything you do Gerg!

[@Gerle71]

Clegg is a most helpful dude.

[@jeffreylyons1531]

22k on my turbo 1.8 with no issues

[@MrHeisenb3rg]

Approaching 20k on my 1.6 turbo build here because of this channel

[@scottcameron5972]

My stock 1.6 with 220k miles is at 270whp and going strong all because I watched this guy

[@MrHeisenb3rg]

@@scottcameron5972 dang that’s a lot of horsepuppies

[@Rumnhammer]

Whenever someone asks me why I only run 10psi in my car and am totally happy with the 200 hp my car makes, I tell them, first it is a stock internal engine, and the second is to go check out your videos. Mainly because making that much power is expensive and you spend more time fixing stuff that breaks and sorting out other things and less time enjoying the car. When you are my age it doesn't matter how passionate you are about playing with cars, your priorities shift to more enjoyment and less issues.

[@jeffreylyons1531]

Agree with you, I’ve got 22k miles on my turbo build, I run 10 then taper on more boost as the torque falls off, but no reason to push it.

[@h3xd3m0n9]

I have a Honda single cam that I feed 37 psi I replace head gasket once a year and work on it all the time but it's part of the enjoyment for me

[@Yaboybash]

Agreed, since doing motorsports I’ve learned to keep the car simple and get more seat time rather than build time It’s easier on the wallet and you wanna spend your money on the tires more than the engine problems lol

[@aygwm]

Greg isn’t content to just sit back and let others push the envelope. He wants to go from Miata dad to Miata GOD.

[@bandwagon240]

All good motors self-clearance, nothing to worry about here.

[@michaelbull6906]

Been a subscriber for years and it’s always upset me that you aren’t bigger, your videos are always amazing and have so much useful info. Tbh for being a very miata based channel I feel like 140k plus subscribers is still really good but you deserve way more, especially because most of this info works for all kinds of automotive applications. Video is great as always man!

[@dennisstafford108]

When it comes to Miata content, he is hands down the champ . I appreciate the he has kept it all Miata and not chasing views/followers.

[@SkylerB17]

bruh them pistons were just giving the homie a gently kiss on the head.

[@WARXion]

You've been working on these cars/engines for ages yet the anxiety when you first start up that engine never goes away does it? 😅

[@debbiereynolds7759]

I blew up my 1.6 (again) with a big turbo. maybe if I follow what you do instead I'll only blow it up once every few years. thanks garth!

[@placka226]

Although I am a simple 1.6 NBfl naturally aspirated dweller, I can't stop watching every one of your videos! Thank you very much for the effort you put in and all the detail you go into. Truly great that the Miata community has such great content to consume. Hell, maybe one day, I will end up joining the turbo gang! Or the rotrex sc perhaps... Looking forward to the next upload!

[@Rebel635csi]

lol. I saw the wall of HG and smiled, then the mic on the HG had me chuckling out loud.

[@Soulhun7er517]

TheHeadgasketPassionChannel 👍 Love you Kreg, stay how you are.

[@SpeedWhomp420]

Greg, you showing all the ups and downs of your build is why I love your channel so much. The analysis on why parts failed (thanks previous vid comments) is extremely helpful is learning our own builds. I'm hoping to have that same elated feeling you had at 16:20 myself this weekend. I think Donut says it best, cars are pain haha.

[@MeisnerMotors]

Greg Peter’s Miata ❌ Craigslist Beater’s Missile ✅

[@tylerreed7385]

But being honest I'm building a 1.6 turbo build that's a cross between gingiums and yours, but I'm in UK so running Ron99 and water-methonal

[@Tommy-B.]

I just wonder if the head should have been resurfaced flat again after the piston contact.

[@TheCarPassionChannel]

There's only so much time, and so much patience I have for my ONLY car, hahaha. I just want it to run (but also maybe blow it up once in a while 🤣)

[@iko3]

Many of us get off our ass and go work on our Miatas and other cars because of people like you. Just finished doing a BUNCH of work on my car and I referenced your videos MANY times. Watching all the hard work you put in is truly motivating.

[@AlexPerrucci]

Awesome to see the car is running well again! Also seeing the gauge hood move around when you're doing pulls is oddly satisfying haha.

[@TheCarPassionChannel]

@@AlexPerrucci I never even notice it until I watch the footage back 😂

[@BigBenlolz]

Sir your gauge hood/cowl is holding on for dear life, please get a new one. Love all the new knowledge of this whole phenomenon, thanks for pushing the limit for us.

[@shtboxgarage]

Its better than most are on Miatas, if you lightly breathe on them they shatter

[@802Garage]

Fascinating! Hadn't actually heard of this specific issue happening in this way before. Have you generally had good luck with the copper spray?

[@guidosaur7506]

man, seeing that fuel hose cracked reminded me so much of when my shitbox miata was turbo. Between fuel lines and turbo coolant lines I swear I was changing rubber hoses once a month. I don't miss that lol

[@EndriuGolara247]

the technical breakdown of each problem is great, they make you and your videos thrust worthy, I choose to wait for your videos than to watch some shady stories of other youtubers making insane power in misterious ways, keep going Greg!

[@redneckcrawler2367]

Agree. I want to know what caused the problem, not just how to fix it.

[@jeffives69]

Two of my favourite KZbin channels rolled into one TheCarPassionChannel and Summoning Salt 😁 Keep up the amazing work man

[@shirtz69r]

Great watch grep. Looking forward too seeing the new NC

[@dpg_creative]

I watched this, then the previous video, then this one again. Always impressed by your ability to rise up after a setback and share everything you've learned. I finally dialed my setup to the edge of dependability after pushing it super hard, breaking it, and having to rebuild the engine again... If you don't try, how will you ever really know what your limits are?

[@xXRougeNinjaXx]

First I want to say congrats on getting it running again! It’s super awesome to see it wasn’t too bad with the damage! Secondly congrats on showing how much the 1.8 and Subaru have in common🎉🎉🎉 now me and my 1.6 are gonna scoot away

[@sagesends]

Good shit, awesome to follow along with this experiment

[@MultiMustek]

Thanks for this video. I was hesitating between turbo and swap. Now I don't have this problem anymore ;)

[@LordLoMR2]

My MR2 went through 3 engines running high boost. Now I just run a conservative tune. 😂

[@ninpo99]

thanks greg! im a boosted 1.6 nb enthusiast that will build the bp4w and make it reliable. thanks to many others and to You!

[@maxp8892]

Greg, I had to move away from the Cometic head gasket to a Mahura head gasket that solved my problem.

[@of_lion22]

For those curious about Quench (or Piston to Head clearance), you can still have Piston to Head contact even if the pistons are below the deck (cold). The reason it's not recommended to go below 0.030 in Piston to Head/Quench cold engine clearance is because as the engine warms up, the rods can stretch and decrease Piston to Head clearance. High RPM also increases this stretch. Combined with cylinder pressure causing piston rock, it can turn that Quench clearance into 0 or negative (pistons kiss head). Piston rock is exacerbated by the wide Piston to Cylinder wall clearance needed for Forged pistons (that expand a lot as they warm up). The recommended Quench clearance changes depending on the Rod material (and weight of the piston). Aluminum rods can require double or triple the Quench clearance as the aluminum expands much more than Steel. Greg, you rule, and it's always great to see you document the process of pushing limits. 0.020" Quench is freaking crazy for a high rpm, forged piston setup. And you proved it's just fine (heh, well, not catastrophic).

[@ifarmer1776]

I saw that little NC hint and you said you were looking into another project. My NC was my first car but I sold it after hitting a moose. I’ve regretted it ever since. I’d love to see you build an NC. 2.5 swap short stroke or boosted setup would be awesome to see.

[@mariosnikolaou5212]

M8 you are an absolute legend. I saw your entire video. I love your content and how much technical you get. I just finished puting a 6cyl engine in my e30 that originaly came with a 1.6L, 8v, 100hp and realised how cool your engine looks with it's nicely painted parts and the exitment that you are getting with the boost. But because i am in a budget i sacrificed the 4cyl lightness for the ease of installation, cheapness and realiabilty of a 24v, 2.5, iron block. Thank you for what you are doing. Greeting from Greece.

[@sonofthehill1320]

Good luck this time around, hope it holds together!

[@Sommyie]

I have a skyline I've been building for 3 years and it's almost done.... Because of you, i never gave up. Thanks for the videos! I'll share more when it's running... Last hose I need to get delivered today!fully rebuilt rb20 + way too much boost

[@ATXevolutionz]

I love learning about these little quirks of a high bower build ever since you started. I'd be blessed if Miata dad could maybe help figure out a couple of my builds quirks.

[@Swagger3161]

Glad you were able to remedy the issue with a thicker head gasket👍 Now you can buy another Miata and so something crazy 🤘

[@ilovehappyemos]

With the MLS gasket you can torque the bolts higher than 60 ft. Lbs. with those studs. That gasket clamps evenly unlike the fire ring gasket you ran before. Nice car!

[@TheCarPassionChannel]

@@ilovehappyemos I have since ramped up the torque to 85, so far so good 👍

[@M.A.S.-SuperiorService-]

Hey Greg, love the videos. I love efficiency above all and seeing you push the limits with high compression really resonates your channel name. Id love to see you add a second ac compressor to the car with a simple loop into a water tank that feeds a water to air intercooler. q50 guys are doing it and pulling 40f air intake temps all the time. Might be a way to put 500Hp in a reliable way!

[@mastercricket7626]

Hell yeah bro .. glad you figured out what it was ... and i run 30psi on a pulsar 4849g (g25-550) on a boared over forged bottom end 1.6 and i would lift the head untill i went to 70ftpd on my head studs and sofar it has held .. but als like 8.5-1 comp ratio so that makes a world of differance ... but anyways bro , super happy to see ya post and hope to see what ya come to next with ole red ... peace and love bro keep it rad stay safe and build on... l8z fam and keep having fun

[@fsolo97solo94]

Make sure you use fuel injection hose that one that cracked looks like a low-pressure fuel hose i had the same issue it only last about a year or so

[@LoganDiehl2]

Miata Dad ❤️

[@1dameister1]

Maybe machining the combustion chamber in the head would help, it probably will bring down the compression ratio, but you will still be able to run the pistons and the head gasket that's in the engine. And maybe try porting the heads (intake and exhaust) and change the turbo or the exhaust header from the head to the turbo for different one with more exhaust flow in mind at higher boost application. Greetings from Germany ✌✌

[@AN7OverClocker]

Thanks for your content and knowledge sharing all these years. Hope you keep developing the BP platform and don't back down with issues like that(pressurizing the cooling system, maybe a crack on the head or the block you haven't see?)

[@TheCarPassionChannel]

Thank man!! Every time I have a failure I think I'm that much closer to making everything work together, haha

[@Juhsga]

I appreciate your diligence! And love your build!

[@ks1622]

Makes me smile when I get home and see a new video got uploaded by Bret after a long long day at work

[@firedustman]

thank you for all these experiments

[@bmanjohnson51]

I used that fuel hose on my wrx and within a year it looked the same way. Had to get some high pressure fuel injector hose and haven’t had an issue

[@hellfireclub86]

Always loving the content Grogu

[@jeremiahgaskins9127]

Sheesh, that's some of the finest self-clearancing work I've ever seen. So happy it's back together.

[@JamieBainbridge]

Armor Mark 50060 is low pressure fuel hose. Meant for carburettor fuel systems like 5psi, not for EFI fuel systems like 40psi. You needed Armor Mark 50087 high pressure fuel hose. Rookie mistake Dad 😅

[@TheCarPassionChannel]

Rated for 3.4 Bar (50psi), enough for stock but not for my build pushing 80-90psi in boost. Rookie mistake intended

[@JamieBainbridge]

@@TheCarPassionChannel Hmm right you are, SAE J30R7 should be 50psi operating pressure. Weird that AutoZone advertise the 50060 as low pressure hose only. I guess you need SAE J30R9 hose which is 100psi operating pressure.

[@TheBaconAgent212]

Tool steel studs or equivalent and copper oring the block Also a better cam will help with water pushing

[@tuckertenhoff]

Oh the joys of head gaskets, when my Miata was stock I swapped in a .040 gaskets and it lost power, I quickly switched back to a .032

[@paul1329]

I had gates hose do something very similar in less than a year, I was lucky but there was a huge puddle of fuel 😅

[@TheOhsemix]

That cam and turbine housing will cause more issues than they solve if it’s out of its efficiency range. Put a pressure sensor on your exhaust side and if your backpressure is too high you might actually fix all your issues while losing little to no response with a proper size turbine on the turbo. And all while picking up power and making it safer due to lower risk of detonation.

[@kentworch]

Love you Greg, glad you fixed it up and love your work. Love what you do with that BP engine and sorry to hear that you had some clearance issues.

[@MrJasons9]

Thanks for all this detail, I love following along in your tuner journey. I'm curious what would be the fix for your coolant issue if you wanted to stay at 500whp. Sounds like you were saying a less responive and more peaky power band would not have the same issue.

[@cerevo]

I'm more impressed at your stamina to keep trying a different way every time, no matter what to make it work. I think a responsive 400 whp miata is probably an absolute blast to drive and if I were to go for more I'd agree a different chassis (cough NC cough) or at the least an engine with more displacement that is proven well above 400 by many many many people. The BP can make more, but theres not a ton of cars out there that are doing that. a K series on the other hand...

[@roninvirtues8012]

Love watching your videos. The in-depth information and quality 💪🏻 Been helping a bunch 🙏🏻

[@AdamLafr]

NC build from you would be sick

[@mikecruz4356]

I am finishing building my 1.8l 323 that's going in my miata na. The motor is fully built for 900 hp my goal is 400 to 500hp with a turbo ll trans setup. You give a lot of information on all your videos and I would like to thank you ❤

[@ubeherelongtime]

Hopefully you realize these videos are priceless bud just your thought proses and explaining what was wrong even if it's not what you think is what youtube needs ... critical thinking and problem solving 💯 good man

[@ethanschocke333]

Im excited to do an ecotec in one of my miatas, pretty easy to make big power reliably. Keep the 4cyl goodness, make it lighter with full aluminum block.

[@redheadmetalhead247]

NC GANG RISE UP. Please buy an NC

[@MitchelYardley]

😏

[@clay_pizza]

Great video!

[@38tech]

Love me some rants. Keep up the good work my dude!

[@Dankometer]

Came here for your miata knowledge, left wanting tacos. Love your stuff bud.

[@mrfixall]

At 17.42 something sounds fishy...lol

[@BentDog305]

It’s always something. The marathon continues 🫡

[@whitebear96]

our boi Craig saving the day as always, those games aint gona play themselves. burgers well deserved

[@Striball]

Dang it Graip

[@galosengen856]

I hope you decide to hook up a pressure gauge to your coolant system as an early warning device for the future.

[@aryapirooz770]

Nice to see craigg again

[@jonasfrito2]

Coolant pressure sensor? Can the ECU respond to a spike in pressure by lowering engine power / going to safe mode? Really like your videos, it shows whats possible for the miata !

[@Thee_Sinner]

Miss you Crag :*

[@ericschatz4943]

dang i use that fuel hose a lot

[@h3xd3m0n9]

Its ok i do a head gasket once a year in my single cam civic and im somewhere in the 400 - 450 whp at 37 psi

[@completetuningsolutions]

I would highly recommend sending the oil out for an analysis at a minimum (bearing material), better to inspect the wrist pin and rod bearing on that cylinder that was contacting.

[@ldsiverling]

mine has been on jack stands for a year. mostly due to laziness and having a kid now. I really need to finish this vvt swap :[

[@danielhess8700]

My kraken kit comes in Thursday I cannot wait to get my car boosted you have been so informative and helpful it has motivated me to go boosted! 97 na8 gtx2860r for future built engine head room right now my goal is 250whp with 6 speed and stock bottom end

[@TheCarPassionChannel]

Dude you're gonna LOVE that setup

[@danielhess8700]

I cannot wait I bought the kraken because of your videos and I’ve watched every one of your videos to understand the knowledge from catch cans to just simple tuning videos for megasquirt thank you so much and keep up the great work! Can’t wait to see what’s next for the vvt beast!

[@Flozby1]

​@@danielhess8700 you should upload some videos on it. I'm thinking about going with this same setup on my 95

[@boiled4safety]

Yayyyyy Miata dad is back!

[@MitchelYardley]

“Should I buy an NC Miata “ 🤣 Yes, Greg, YES YOU SHOULD!

[@TheCarPassionChannel]

Of course you'd be the first to notice that 💀

[@MitchelYardley]

@@TheCarPassionChannel🫣

[@luis720lm]

@@MitchelYardley Stop it. Stop it right now. You and Jason can be the boat guys.

[@rtsoccerplayer]

Maybe the fuel hose wasn't rated for E85?

[@slizzybob1780]

damn this car gets more head than i do 😔

[@smiller225]

Would backing down timing at peak torque help save the head gaskets. Thats what stock bottom end LS guys do.

[@TheCarPassionChannel]

Yeah that's exactly what's in the cards, I need to stop pushing it so hard on the cylinder pressure

[@raceslash4x4]

You’re doing another head gasket if it pushed coolant out lol I’ve done so many myself.

[@StingrayOfficial]

Are higher quality head studs rated for higher torque, or are you still required to use factory torque settings? What would break first if you over-did-it? The head or the bolt?

[@TheCarPassionChannel]

The head can warp, and the threads can pull out of the block

[@alexsgarage422]

Ricer Miata ran a high 10 in his roadster before she got totaled and he was only making 420-428 idr the legit number but it’s possible to still run a 10 at 425-450

[@mx5_enigma308]

Greg, you're the GOAT.

[@Thee_Sinner]

Just take a dremel to the edge of the piston

[@DeYmOKits2871]

you have too mutch back pressure, internal wastegate no great for 500 1 you need a external wastegate 40mm(for more big escape scroll) or 45(for same .64 scroll) 2 you need a shot downpipe if this dont work 3 you need more big ar scroll 4 a quick spool valve (quick boost and mutch escape flow capacity regards c:

[@TheCarPassionChannel]

@@DeYmOKits2871 Backpressure is likely high on this setup but the Borg Warner IWG has exceptionally high flow compared to pretty much anything else. And I don't want to go to a bigger AR and lose response

[@PANTYEATR1]

I know the thicker head gasket was the cheaper option to bowl work. Personally i would have sent the head to a machine shop and have the bowls reshaped, then retained the thinner head gasket. Both ways work tho. 💪🏆

[@NappMotorsports]

This man’s taco game never misses

[@sickmiatabra]

I heard taco date next rendezvous

[@Jamalolz]

Another great one Greg 😁 just a little side thought though would having the pistons touching the head even briefly like that cause any kind of big end bearing damage? I guess like detonation it’s sledge hammering the rod down. Would love to know your thoughts

[@TheCarPassionChannel]

Definitely bad for the bearings

[@austinsnider2957]

Appreciate the content!

[@FreddyFunderbunz]

Damn, Craig

[@twistiepillowzjr.9751]

Is there a different set of Pistons heads you can use for this build are those two specific ones you have to use

[@MaddyBee]

Might be inching closer to a K swap with Artec Turbo manifold

[@thewheeltroll1833]

Rumor has it the stang owner is still trying to figure out how he lost to a Miata 😂

[@TheCarPassionChannel]

Gave me a big old 👌 after he drove by haha, fun race

[@ProModsPerformance]

Fuel Line age probably is less to do with it, rather than the SAE 30R rating since you're running e85. If I recall it needs to be SAE30R9 or higher to be "rated" to be compliant with ethanol full time. Was this stuff that rating?

[@TheCarPassionChannel]

It may have a different rating from the other lines, just crazy because I've never had a fuel line so that, and I've been purely on E85 for the last 10 years with this car, all rubber lines. But yeah, very well could have been the issue.

[@SaulBarry]

Thoughts on the gbc20-300?