Engine Autopsy | Detonation

[@GetWRXT]

I saw the title and pleased to see it wasn’t an EJ engine 😂

[@bout2partyhard]

HA!!! Same tho

[@MegaNardman]

They must be saving the EJ for an example of spun bearings :)

[@hotshtsr20]

Let’s see a feature on that high performance Rolla!

[@TexasVexes]

Those cars are amazing. Half million miles regularly with maintenance

[@MalcolmCir]

Full bolt-on R35 vs. Sweet ass, no clear coat AE102 'Rolla... Round 1, FIGHT!! 😁

[@motoiq]

It is a project that doesn't break, we are seeing if we can hit a million miles on it.

[@carculture3376]

Only Mike could have a garage where a mint 35GTR is parked right next to a 90s corolla with peeling paint. I also ding them yellow shades!

[@thatrealba]

MotoIq, David Freiberger, Banks Engineering, Whipple, Engine Masters, Steve Morris Engines, and others ... we have more incredible knowledge of engines and types of boost at our damn fingertips these days. Insane

[@obxurv]

Corolla beside a GTR?? Sublime 🔥🔥🤌🏼

[@bryanduggan]

Nice Corolla

[@CarRacerGVR4]

Breaking stuff is sadly a really great way to learn with cars, so thanks for sharing this info to save us some money!

[@Nathan0A]

One of the most elucidating experiences I had early in my tuning days was fixing a pair of Det-cans to the engine that I was tuning. The ability to hear the *sparkles* that would occur on the edge or leading up to detonation inspired me to learn more about combustion dynamics and helped me calibrate knock-sensor equipped engines with noisy valvetrains.

[@waynetanner1749]

Excellent, Mike. Engine Autopsy series, a capital idea for sure. Komakai setsumei, sasu ga automotive engineer. Looking fwd to more engine autopsy videos!

[@darrylcavanaugh9465]

So much real world info. I know I appreciate it. I bought a project 280Z with an RB25 swap. Nice collection of parts,but lacks the execution I want, and Its at 22 psi, on a stock rebuild, with a pre-tuned ECM. No Bueno. I’m collecting parts to avoid exactly what you are describing here. Dial it back, set up the proper tune, and enjoy it. Hero HP numbers=a pile of broken parts and a lot of wasted cash. Thank you, Mike. Keep them coming.

[@Clobercow1]

Big like man. From your eye on why it failed is pure gold man. Thanks for the video! Please keep them coming!

[@m.m8760]

MotoIQ Mike doesn't need an engine manual because engines whisper their secrets to him.

[@boosTiMon]

Mike’s awesome with helping out the community with answers to so many things.

[@janmolenkamp3778]

Well appreciate you lectures about the high performance and what it en tails , your experience is a gold mine off goodies , we all learning from the best I belief , by thanking you so much for the video. Hope you have a great day , and a big hello from Melbourne Australia.

[@jasonchew4840]

great videos as usual, thanks Mike!

[@HAULUUZ]

“ONE PULL HERO” 🤣🤣 Didn’t PULL OUT on time.. 😂🤣

[@notsam498]

No joke though, I had a fairly large racing company doing remote tuning on my car. they are one of the big ones for GM's. they were using hp tuners. I knew just enough about this stuff to realize they had gone in and almost completely defeated the knock control system to push the numbers up. the knock control system typically has a tables to remove a certain amount of timing advance based on a variety of factors. the table that gives the absolute value to the number of degree removed was set to 0. I proceeded to learn how to tune my own engine and told them to shove it. One of the best decisions I have ever made I am sure my car wouldn't have lasted long, it currently has 180k miles on it and that was 120k miles ago.

[@loadb5985]

I would very much appreciate a video where you do knock identification would be very cool

[@motoiq]

That is what this whole video is!

[@loadb5985]

@@motoiq by ear

[@motoiq]

It would be a good idea but I am not willing to subject an engine to that for long enough to capture the video.

[@loadb5985]

@@motoiq if you ever catch one in the wild, please share

[@jgoo9912]

​​​@@loadb5985 ​High Performance Academy have a video up on their channel relating to knock / detonation / pinging with an audible knock example

[@pmlaaudio468]

are you located in Gardena???

[@drewstone-z1d]

i just blew my turbo k up yesterday =(. glad im ok but still sucks

[@jamestregler1584]

Great to see you, thanks from old New Orleans 😎

[@gafrers]

Love this video and the series idea. Always so well explained by Mike. 👍👍 I understand why you used the term Autopsy; even if technically it would be a Necropsy. Nobody knows the second term and difference.

[@ChurchAutoTest]

Cmon, don't make us google it! Englighten us on the difference.

[@gafrers]

@@ChurchAutoTest Autopsy refers to humans, hence the Auto part. Which could also be used as a pun for this series' name. Necropsy refers to animals and anything that isn't Us humans.

[@bennyz1971]

Great video, thanks 👍🏻

[@blobcsgo7190]

thamks!

[@msknuked]

@MotoIQ what are y’all doing the that 95 corolla ?

[@motoiq]

keeping it running

[@msknuked]

@@motoiq do some magic with it and make fun with it. Those ae corollas have potential.

[@anthonylove6639]

Also when tuning and running your engine on the track or road racing. Your EGT’s matter and should be consistently monitored👍🏻

[@lobotomyy]

very useless data tho, every engine has a different exhaust temp. If you do the same build with same boost same internals everything the same then yes you can use egts for comparison but egts are not comparbale at all. A sr20 is nit gonna have the same egt as a k20. Its like saying they need the same advance- Whats more important is intake temp since that is actually comparable. But even if it gets very hot u usually install a failsafe so the engine runs less boost or advance when iat‘s get hot. More boost= more egts- it doesnt mean your engine is gonna blow up. Real engine damage can happen wayyy before egg‘s get out of „norm“

[@dannoyes4493]

Well Done.

[@tristancarlson4816]

What 4x4 is that in the back with the exo cage? Looks sweet! Thanks for another great video

[@303cris]

dodge ram

[@motoiq]

4 Runner

[@TheRealBanana]

My last engine failure was a piston wrist pin retaining clip snapping in two places, still not exactly sure why. I think I used a metal tool to help get it into its groove last time so I've switched to using a wooden tool now so I don't scratch it. Most common failure I get is burning/cracking through the piston at the mold parting line. I've thought about using a dremel to make that a smooth surface, but I don't know if that would help much. For now I just keep the temps as low as I can and don't push it when its too hot.

[@motoiq]

Is your engine tuned right? Why are you using a cast piston for extreme use?

[@TheRealBanana]

@@motoiq Its a stock Honda motorcycle engine from a CB300, Id love to mess with the tune but their ECUs are locked down tight. I think they come a bit lean from the factory. I also really beat the hell out of it (lots of time at full throttle 6th gear, high rpm). But they are very easy to take apart and put back together and the piston is $60 so I don't mind it too much. At this point im treating it as a consumable item 😅. Although every now and then it wipes out the cylinder too which is $90.

[@motoiq]

Try a power commander?

[@TheRealBanana]

@@motoiq That seems like the best option. I've always dismissed it because the performance to be gained is pretty small from this engine, but the added reliability might be worth it. Something for the future when I get bored of rebuilding it 😁.

[@RacingHeartMedia]

I need to save my vq35de before I have to gen 2 VQ swap it😢….. oil keeps fouling out my spark plugs

[@zakburnett6690]

I have a push mower that's knocking pretty bad, should I just let her eat till it's insides become it's outside or should I get inside it and see whats coming apart

[@alibabaei1953]

How can we prevent this. does it sound specific?

[@motoiq]

Tune and fuel it right for the most part

[@alibabaei1953]

@@motoiq you mentioned detonation has a sound, how do you know when you hear it, it is detonation?

[@motoiq]

Sounds like rocks being shaking in a can.

[@DavidT97]

Is this a VR38?

[@motoiq]

A Ford

[@RobsNeighbor]

Great information! Thank you

[@franciskimenyi4978]

What is that Corolla doing next to the GTR 😂. I had one like that for over 10 yrs . Are you modding it?

[@motoiq]

It is our maximum mileage project. We want to see how many miles we can get out of it before it dies.

[@TexasVexes]

@@motoiqit might outlive us all lol

[@franciskimenyi4978]

@@TexasVexes lol .I sold mine coz it just couldn’t die

[@abztraktgaming]

That AE100 in the back tho👀

[@matteocoutant4282]

Hey Mike, my 12:1 compression H22 Honda motor runs really rich. It was dyno tuned on 93 octane, and made decent power. The exhaust is sooty. I know honda Vtec motors are tuned rich from the factory. Is this just a safety measure to prevent detonation at high rpm? And if I tried to get away with a leaner tune, what would be the downsides? Appreciate you guys. Great knowledge here.

[@motoiq]

I don't know what rich and leaner means, got the AFR's?

[@matteocoutant4282]

@@motoiq it’s tuned to 13:1 at WOT

[@motoiq]

That is super lean on pump gas.

[@matteocoutant4282]

@@motoiq Ok, thanks.

[@motoiq]

Aim for mid 12's to be safe. Might loose a little power but it would be safe. 13:1 is risky with 12:1 and pump gas.

[@cnknguyen]

Hi Mike.

[@pjmcgarvey]

How do spark plug ceramics end up in the cylinder? 😮

[@motoiq]

Plug gets busted up from detonation.

[@rori1891]

The Carolla ❤

[@Rickie-37]

Hey, I was taught that if the detonation on pump gas is audible, it's at least 5 degrees too advanced. Would you say that's correct?

[@motoiq]

I would say you gotta correct or it will end up looking like this engine.

[@Rickie-37]

@@motoiq Oh yea no doubt, rebuilt several engines tuned by other shops in the past only to hear detonation on the first test drive. I usually rely on the data from ecu so adjusting timing based of hearing detonation is a bit foreign to me, I typically allow a maximum of 6 degrees timing pull by the eco on the hottest summer days.

[@motoiq]

We tune for zero

[@strifefaction]

My ej leaned out on boost at high rpm from 6-7k the other day. Still runs and sounds normal now and pulls the usual amount vacuum at idle but def think I heard det...How f'd am I? 😢

[@motoiq]

Sounds like its ok. Better fix that lean issue.

[@strifefaction]

@@motoiq fixed it immediately in the tune when I got back from the drive. Ve table had a mistake. Hopefully it continues to live on

[@mrvector257]

Would love to see more videos like this. Tons of great information. Was the actual root cause confirmed or just theories?

[@axhhy]

so sad

[@emotionz3]

When you run speedway gas in your boosted motor and push the ignition timing too far. I can’t imagine what sounds this motor was making, but it was making them, and they were ignored.

[@cd9225]

some people put in the wrong gas octane like using 87 instead of 91. Regular stock engine with normal ecu

[@motoiq]

Most late model cars that should be ok, you will just loose power.

[@cd9225]

@@motoiq that's good to know, thank you

[@GixxerRider1991]

What engine is this?

[@Zionslayer1]

3:26 Only Mike can build a G20 that needs a wing like that.

[@motoiq]

Actually that's Martin's car.

[@boostedrex9460]

Please reply i commute roughly 90 miles a day in stop in go traffic in california, i have a 2015 launch edition sti. Is it normal to burn 1 qt of oil at 1500 miles? Im doing 3000 miles oil changes but is that type of consumption normal? I have no white exhuast smoke or no white smoke puffing out of my oil cap.. no rough idle no problems whats so ever at all feel great and healthy doesnt lag or feel sluggish... i average about 28 mpg in my car. But is that normal? 1500 miles 1qt if oil? ​@motoiq

[@rogermartinez78]

You my friend should make your daily driver an EV, 90 miles a day in traffic burning gasoline is insane!

[@boostedrex9460]

@rogermartinez78 apparently oil too. It's my daily driver I bought it so I can use it. Idc about money I'm a welder. I make bank in california. I'm just worried about my car I just bought it. Lol 2015 wrx sti launch edition 30k miles 1 previous owner. From a old tech the car has been stock since birth

[@boostedrex9460]

@rogermartinez78 I drive it at 60 mph. 65 max. I have fun here and there but nothing crazy to be burning oil like it does. The manual says 1qt every 1200 miles is acceptable but is it really?

[@motoiq]

That is on the high end of normal. I might consider an AOS and a heavier oil like 20w50. Also stay on top of that oil level and make sure it doesn't get low, this is one of the reasons why Subarus blow up.

[@boostedrex9460]

@motoiq love this damn channel I subbed already thank you! Do you think my problem can be because I'm using mobile 1 advanced full synthetic? What brand would you recommend I try? I can get at autozone? Valvoline? Castro? Royal purple?

[@christan3278]

We seen so much Dyno Queen over here then rods eventually flew out of the block in very short time. All for the sake of bragging rights.

[@bradlywalsh5786]

i love engine autopsies *pun intended*

[@tommylyeah]

Is that the new Project R35 behind you?

[@motoiq]

Yes

[@tommylyeah]

🦍🦍🦍🦍🦍

[@vladbej959]

From a perfect evo 9 to an old beat up Corolla. That's one heck of a downgrade 😂

[@hdoglesby]

I can here detonation when people use the cheap, low octane gas. Usually Nissan Altimas or early 2K-2010s Hyundais/Kias. Really

[@gurtabe]

Merch = purchased

[@christianadrover2083]

Please do a comprehensive video on water/meth injection

[@motoiq]

Go to MotoIQ.com and search articles we have done on it. In this day of easily available E85 and flex fuel systems, water/meth is falling out of favor. It is still a viable option if no flex fuel system is available for your car or e85 isnt available where you live.

[@chrischeezer]

The most common sign of detonation is tiny pits, sprinkled on the face of the pistons. The pistons in the video don't have much of that, if any tbh. Did anyone else pick up on that? I love this channel but I don't believe this is a good example of "detonation" ? maybe the camera wasn't picking it up? From what i see the brown/black parts are just extreme heat not detonation... please correct me.

[@motoiq]

they do it is hard to pick up

[@Mistabushi]

Water meth combo is cheap, cheaper then engine rebuild 😅😅😅

[@timothyschardt6672]

What's with the Corolla?!😎

[@motoiq]

It's project 500,000 miles.

[@raj-u6t1m]

​@@motoiq trying to outlive a corolla outside the rustbelt is a young mans game. May your health outlast your corolla.

[@MickyMouseLimited]

I am surprised that you wouldn’t offer to install and tune the engine especially after high performance rebuild. In the commercial world an Engine job is not completed until running up and the engine based on the specific load running in diagram and load testing the complete package for few hours . I am surprised that this kind of rebuild is even considered where one person is building the engine different person is installing it and a 3rd person is running and testing the engine. On the end nobody is responsible for anything and the customer is simply dumping money and obviously the customer is the one that has no training or complete understanding of the process. This is completely shocking to me.

[@motoiq]

When the customer is 3000 miles away it is hard.

[@ChurchAutoTest]

Up until the aerospace guys got involved, rotating detonation engine was always a bad thing...