HOW TO FLY CUT PISTONS

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[@hughobrien4139]

I’ve been an automotive machinist for over 30 years. I’ve never cut valve pockets this way, however it’s a very good way to get it done. This will ensure your valve pocket is square to the valve head. Considering the fact that valve guide centers and angles can be slightly different and not perfect this way can ensure that each and every piston is square to that particular valve and valve guide centerline.

[@dirtyminerapparel]

We have been doing this for 35 years on interference engines and it’s so cool to see someone so young doing this. Great work!

[@britneyautomotive]

Thank you!!!!!

[@dmystify1381]

i've never fkng heard of it....thats why im here.......👍

[@b.c4066]

Level up the bank you're working on, fill the valve relief with w/d-40, slow drill speed, steady pressure and you'll have less chatter. Then when done, bond a piece of fine grit paper to a valve of the same size to polish and smooth the newly cut valve relief.

[@reidsanders3552]

Problem with that is the Gen V piston doesn’t have a valve relief on the intake to hold any amount of WD40. Can only really get a coating on the face. But wD would help reduce chatter. The chatter is so fine if you were really worried about it some 400g would fix it quickly

[@chehystpewpur4754]

@@reidsanders3552 chatter is bad so he is worried about it. i would be too honestly. yes a flat surface wont hold it for long but i promise you. machinists and engine builders have mastered it long ago. a dripper or another squirt. gear lube is great when you need a lube that sticks and so is actual grease or assembly lube its nice and sticky/tacky but liquid when hot so it doesnt get in the ways. atf is pretty great too. it cleans and also lubricates . ill refrain from making any ex girlfriend jokes and what not because were adults and im always happy when im single... chatter can cause some pretty bad damage thats unseen before its too late and looks like something else. smooth and steady/slow is always best and sometimes it just takes too long.

[@davidmiller4594]

You actually want to speed up the cutter and/or slow down the feed rate (pressure) #speedsandfeeds

[@HoleshotKFX400]

@@davidmiller4594 to eliminate chatter? lol its the other way around slower speed more feed. you can oscillate spindle rpm also to limit chatter, or hit the sharp edge of the cutter with a diamond file to dull it a bit for more load.

[@whiplashmachine]

@@chehystpewpur4754 We machinists and engine builders usually just do this on our milling machines, never any chatter. This way has been a proven to work backyard method though.

[@dinorains9145]

When I started learning how to work on engines and cars I've messed things up and broke things in the past but I got better at doing it and I've been working on cars most of my life that's one of the reasons why I enjoyed watching your videos because you're teaching me things I didn't know how to do. So keep educating me. 👍😊

[@robertheymann5906]

Anytime someone gets into cutting on pistons usually means they are stepping up their game. That space and shape, not JUST the head, is worth spending time on. Great job

[@britneyautomotive]

I’m skipping a level and going up 2🤪

[@robertheymann5906]

When we built dedication race gas NA motors with 14:1 plus compression piston crown heights/ shapes and valve pocket machining gets critical. Be bold and take big swings at stuff if the budget allows and your learning curve will show it. Skip 2 levels!

[@ericcouch7583]

I love the knowledge you put out there for everyone!! It's nice to have a woman with the experience and knowledge and the drive to actually learn and teach others. Your awesome!!! Happy Thanksgiving!

[@britneyautomotive]

Thank you!!!

[@tristanh4007]

Just something to note for anyone fly cutting pistons, the piston and valve aren’t closest at tdc, you should probably find out at what degree the valves are closest to the piston and cut the pistons there. A lot of the fly cutters are oversized so it shouldn’t matter much if you don’t though. Keep up the great work Britney, I love a good build series!

[@themotocrossmodchannelWulfMX]

The only way to really determine TDC is with a dial indicator and some sort of way to lock the crank in place for every piston cut so you know when the needle stops moving, you are at TDC. .120" (or 3mm), is a decent amount to cut. Some sort of cutting oil would work to help keep the cutter teeth cool and lubricated for a smoother cut. Im not sure if this mod is specific to interference motors only, but in non interference, not matter what position the valves are at they won't ever come in contact with the piston head. This mod will also inadvertently lower the comp ratio of the engine (not by much), due to the trapped volume of the motor being larger now that less material is in each cyl. Great video!

[@xtfairmontlover]

10 degrees before TDC & 10 degrees ATDC is where the valves are closest to the piston.

[@shanerorko8076]

It doesn't matter though, if you need 120 thou of clearance you can cut it out anywhere on crank rotation, 120 thou from the crown is still 120 thou off the crown.

[@ayuse01]

@@shanerorko8076 True statement sir.

[@reidsanders3552]

@@shanerorko8076 bingo…. Doesn’t matter where you cut it.

[@minecrafthacker9582]

It makes my heart happy to see another young person who clearly has a passion for engine building

[@britneyautomotive]

Thank you!!

[@johntwigg8162]

In addition to the suggestion of WD-40 I find the product that goes under the name of Alumtap is truly fabulous for clean smooth machining of aluminum.

[@chrislowery185]

I love that "I'll be in my office" shirt. That's one of the best "car" shirts I've seen in a while.

[@britneyautomotive]

It’s from speed society!😂

[@aviciitiesto8076]

I am impressed by your dedication!! Aldo clean and tidy! Gooood! 👍🏼😉

[@britneyautomotive]

Thank you!!

[@TheJagjr4450]

The sharp edges can cause preignition after fly cutting, softening the sharp edges by handworking with a small drum sander helps immensely. IF not coating the piston tops - lightly glass beading the tops allows the piston to accept a nice even carbon coating which acts as an insulator on the piston top also keeping hotspots from forming.

[@moabman6803]

Seems like even after removing sharp edges that the raised areas could still create hot spots.

[@TheJagjr4450]

@@moabman6803 Unless you are running the engine hard for longer time frames none of this really matters. The things I am talking about are only done in a fraction of a fraction of race engines.

[@moabman6803]

@@TheJagjr4450 I would say it depends. If you have a ridge next to the pistons edge from flycutting I would think it could cause preignition readily. Only way to know would be testing.

[@vinnylc]

The piston will always outrace the valve coming down or up in the bore. The reason we fly cut is To compensate for the overlap when the intake valve is opening before top dead center an aggressive Cam. On the exhaust side PTV is not that big a deal unless you're in a full blown race Cam. Keep up the good work! 👍+- 15* TDC is the problem area on split overlap.

[@farukthehandyman3650]

I'm not a car guy. I just found myself here. Salute to men of culture.

[@earlscheib7754]

This young lady should have a million subscribers by now!

[@britneyautomotive]

Thank you!

[@undisputedtruth4954]

I don't even know what's more impressive, but dang it I am impressed. My repair skills stop at alternator/water pump/radiator/tire & oil changes. Oh, I almost forgot about the battery. I can also change and charge a battery!😂 Someone is gonna get hella lucky wifing this woman. He's actually gonna learn something useful in life.

[@britneyautomotive]

Thank you!!

[@jbrownnn100]

The look of determination!! Another awesome how to video 🙌🙌🙌

[@britneyautomotive]

Thank you!!!

[@paulventh7034]

And it is great to see young and older ladies doing this stuff because my Mom did right out there beside my dad so keep the trend burning rubber

[@britneyautomotive]

Thank you!!

[@paulventh7034]

@@britneyautomotive No darling I thank you because other women will see ladies like yall and then other ladies will get out and get greasie with there partner or mother or even their dad so thank you

[@davidmiller4594]

Yup! That's what being an enthusiast is about. Trial and error.

[@britneyautomotive]

I agree🤍

[@MrPdforeman]

Great video ! Very pretty & knowledgable!!!

[@britneyautomotive]

Thank you!!

[@AndyFromBeaverton]

It would be interesting to see some micrometer measurements and maybe a weighing of the pistons before and after. Symmetry is good.

[@britneyautomotive]

Coming soon

[@AndyFromBeaverton]

@@britneyautomotive Sweeet!

[@silvercityslightshow23]

Good training! I don't know much about the technical side, but trying to learn so i can do a fresh build for my Camaro! All the info you share is great! Thanks! Hope yalls Thanksgiving was great! Take care!

[@britneyautomotive]

Thank you so much! Happy thanksgiving!

[@WarrenHester1]

Very interesting and useful information. This fly cut tool is exactly what I'll need in future. Thanks for sharing Brits 🤗

[@britneyautomotive]

Thank you!!

[@joecameron3406]

This is kewl. Can always learn something. I've had a lot of 1st time experience over the years building fixing and repairing these 5 wheelers. 4 on the ground and 1 to aim it LOL

[@britneyautomotive]

Always lots of learning to do!!

[@dennisallen9830]

I must say you taught an old dog a new trick. I've heard of this but have never seen it done. Thanks

[@britneyautomotive]

Thank you!! I’m glad🤍

[@1975napier]

Very cool video! Thanks for bringing us along on your learning experiences. Much appreciated!

[@britneyautomotive]

Thank you!!

[@dicktrickle4197]

Building your own race car engine is elite status 🙌

[@britneyautomotive]

🥰🥰

[@kennethhacker3014]

Great job girl...I enjoyed it.

[@britneyautomotive]

Thank you!!

[@Jim-fe2xz]

You can do a lot with knowledge, skill and patience! You don't need the latest most fancy machines to do acceptable work. I've built many engines with my old school (50's ventage) cylinder boring, honing and valve and seat grinding equipment and gotten lots of life out all of them (besides consistently passing emissions testing requirements). Thanks for sharing this skill!

[@StreetRacingChannel]

Those are some high dollar pistons now that the world famous Britney automotive fly cut them.

[@britneyautomotive]

Haha we will see😂

[@immanutt4442]

in the days of old high dome pistons were solid dome and were fly cut to finish with no issues - now with the hollow done pistons today ...

[@MrTimNed]

Nice job Brit, killin it. Happy Thanksgiving to you and yours. Peace and Love, Tim

[@britneyautomotive]

Happy thanksgiving!!! Thank you🤍

[@xanderx4131]

I have to rewatch these like ten times bc I keep getting distracted, stupid eyes 😂 Happy Thanksgiving gorgeous ❤️

[@britneyautomotive]

Thank you!!

[@YerkitRacingChannel]

You have the right mentality! Get in the shop, get uncomfortable, make mistakes and learn! Have ran fly cut pistons before with no problems also

[@britneyautomotive]

I agree! Uncomfortable means your learning

[@johnnyholland8765]

I could never argue with you. You can work on my stuff anytime... Never seen that done before. Very unique tooling. Don't sweat it if you screw up. That is how you learn. You need a bigger half inch drill with variable speed and not the battery ones. Get a corded one because they are stronger and more controllable. Use a cutting fluid (Tapmajic) for aluminum works great and use a slower speed. Chatter comes from excessive speed. You can also make a roughing cut at 2/3 depth then come back with a finish cut if chatter is a problem.

[@agoodneighborautorepair2176]

Very nice explanation;blessings

[@britneyautomotive]

Thank you!!

[@jesseswonger9699]

Happy Thanksgiving . Glad to see you haven't acquired any more neck wounds.

[@britneyautomotive]

Haha no more yet😂 Happy thanksgiving!!

[@johnwhelan723]

Learn something new everyday, impressive work

[@britneyautomotive]

Thank you!!!

[@zeeelander]

Wow, kinda speechless. I could write a book on what I just saw, on so many levels. But good shit fr.. 💯

[@britneyautomotive]

Thank you!!!

[@adamhawkins243]

Her subscriber count seems like it's going up hella fast. That's awesome she deserves it

[@britneyautomotive]

Thank you!!!

[@SirUncleCid]

Attractive mechanic girl LETS GOOOOOO

[@superrodder2002]

Isky Cams has been selling a similar type fly cutters for decades. fly cutting pistons is normal for race engines because high lifts and long durations keep the valves hanging into the cylinders farther and longer than street cams do. There is only so much area in a combustion chamber so pistons has to be modified to clear the valves.

[@britneyautomotive]

Yup

[@capcadetNH]

I have never heard of fly-cutting pistons. Learned something new

[@britneyautomotive]

I’m glad!!

[@adamaugust9190]

Awesome Video about to do this on my sbc 350 for the first time to clear a nice .600 solid roller

[@timmygiles9554]

I love big cams and that’s the only way your going to run one!!! Happy Thanksgiving girl great videos

[@britneyautomotive]

Happy thanksgiving!!! Thank you!

[@alexrivera4337]

Happy thanksgiving 🦃 to you and your family. Have a blessed and wonderful day GORGEOUS!

[@britneyautomotive]

Thank you! Happy thanksgiving!!

[@MrDilley777]

How do you keep the aluminum shavings from getting down in the piston ring area???

[@britneyautomotive]

Just vacuum it out.

[@wtf0101]

Nice video 👍It's top TDC clearance,

[@tonyedge540]

I did it on my 302 it worked great just make sure you have good lube on the tool or you will prematurely wear out the valve guides, good job enjoy the beauty of engine modifications 👍

[@opiealvin]

Glad you told it straight. No dancing around. Just your real opinion. Good work Britney. I've been told before not to bother fly cutting unless you have a real clearance issue.

[@britneyautomotive]

I will most certainly have clearance issues with what I’m doing

[@tonyt8805]

Great job Britney....🎊 👏🏾 👏🏾 👏🏾 👏🏾 🎊 I was nervous as hell my first time! 🙈 😕 🙈

[@britneyautomotive]

Thank you!!!

[@davidvazquez5795]

Happy Thanksgiving Britney. Thanks for channel

[@britneyautomotive]

Happy thanksgiving!!!

[@davidvazquez5795]

Keep your channel going, & happy Thanksgiving to you & all you're family.

[@caskisner]

Keep pushing❤😊

[@scrotiemcboogerballs1981]

Great explanation for why someone would do this and great video all around you are very talented thanks for sharing with us old man garage told me about your channel and I am glad he did

[@britneyautomotive]

Thank you🤍🤍

[@bluea75]

Awesome job cutting the pistons … happy thanksgiving

[@britneyautomotive]

Thank you!!! You as well🤍

[@jamest.5001]

Clarence, can't live without him,

[@britneyautomotive]

😂😂😂

[@andrewmichael814]

Thank s for the info Britt, and HAPPY THANKSGIVING to you and ur FAMILY. 🤘🇺🇸.

[@britneyautomotive]

Happy thanksgiving!!!

[@andrewmichael814]

@@britneyautomotive 👍🦃🇺🇸.

[@ajw6715]

I learned something new. Thanks.

[@britneyautomotive]

Thank you!!!

[@ajw6715]

@@britneyautomotive Your welcome. Have a great night. AJ.

[@codyhull3259]

There’s nothing like driving an older car with a modern engine in it!

[@britneyautomotive]

I can’t wait!

[@Cheechofficial_]

This should be your favorite woman/automotive channel !!

[@britneyautomotive]

Thank you!!!

[@Cheechofficial_]

You’re welcome!!🤘🏼

[@rayrussell6064]

I'm proud of you Brittany it was scary the first time I did it back in the day but after that it's just a matter of going slow and take your time. Congrats to you for trying. God bless and as always be safe 👍

[@britneyautomotive]

Thank you!!!!

[@johnmatthews2198]

Very nice work, didn't know you could do that, Great video, thanks for sharing

[@britneyautomotive]

Thank you!!

[@gilbertoquinonez1974]

Yo I can't believe I missed the video when it came out I'm slacking but it is 5:15 am LoL love showing love for the channel...! 🤘🏼💯

[@britneyautomotive]

Haha thank you!!!!

[@georgesam7805]

Good ole backyard hacking. That’s what makes this stuff fun I once resurfaced a set of Chevy heads with a brick. It worked awesome. Little gasket sealer and it ran all summer. Do you have any other pages to view ?

[@leonardalcalaii9277]

@Britney Automotive Good job!!! You were taught really well. Your a great teacher. My 1st Intro Automotive College classe was a lady instructor like you ✌😇🔧

[@britneyautomotive]

Thank you!!

[@peted5217]

Using a layer of wide masking tape across the cylinder tops will capture the filings. Had to do this to a set of LT pistons to use on a LS engine since valves are reversed on LT types . Purpose was for more compression the LT piston dome provides.

[@tornado_8554]

Se ve genial!sii

[@britneyautomotive]

Thank you!

[@joelalexvega]

This is dope! I love it, I'm working at a shop where guys are willing to teach me about big repairs. I understand the intimidating factor, but we gotta get it😉 Thanks Britt! Happy Thanksgiving💯✌️

[@britneyautomotive]

Thank you!! You as well!

[@copperh1722]

Awesome content just wanted to tell you that I appreciate your content!

[@britneyautomotive]

Thank you!!!

[@gentimusic]

I'm learning out here, thanks to Britney Automotive

[@britneyautomotive]

Thank you!!

[@brxezo]

Happy Thanksgiving my love enjoy the holidays

[@britneyautomotive]

Thank you!! You too!🤍

[@justinandnickybrock7463]

Been waiting for Richard Holdener and BTR to do this video but there's no way they could hold my attention like you did. 😉 thx for the video.

[@britneyautomotive]

Thank you!

[@shanedevlin6097]

Happy Thanksgiving to you and your family and friends

[@britneyautomotive]

Thank you!!! You and yours as well!!!

[@craigfiles7067]

You should put playdo around the edge of the piston to fill the cap between the piston & bore so no metal/aluminium fillings drops down the sides

[@britneyautomotive]

1 it can’t. 2 I took the entire thing apart

[@gabrielsegura3358]

Awesome video! Have a happy thanksgiving. Eat lots of green bean casserole!

[@britneyautomotive]

Thank you!! I will🥰

[@keithjagarnath5137]

We been doing this with older valves cut on face.

[@danielvick7875]

Great content thank you!

[@britneyautomotive]

Thank you!!!

[@_ITSJOSH_]

Have a great Thanksgiving Britney!!! 😁

[@britneyautomotive]

Happy thanksgiving!!!

[@cameronbarsby4605]

i hope you are doing aluminum pistons if those worl with nitrous i dont know much about nitrous but i have aluminum pistons and they are soo light my next step is a light weight crank which hope you are doing also i have high hopes for this motor

[@timothyheller2580]

I think you are doing a great job and happy Thanksgiving

[@britneyautomotive]

Thank you!! Happy thanksgiving!!!

[@ajyradmirer815]

Yup

[@tynellmitchell667]

Happy thanksgiving Britney from Britney automotives!!!! Have a Awesome one👍

[@britneyautomotive]

Thank you!! Happy thanksgiving!

[@tynellmitchell667]

Just wanted to say your so awesome and cool!!!! Have a sweet awesome day!!! 😁😁

[@tynellmitchell667]

How them apples here are again huh britney😳😥 sorry got the sniffles today hope your feeling well though have a good one!!!

[@kartguy]

Love your valve spring tool! Nice and bulky! They should sponsor you for them pants as well too, you know what I'm saying :D Whew! I heard of fly cutting, but thanks first time seeing it pretty cool and legit since using the valve guide. Happy Thanksgiving enjoy yours!

[@britneyautomotive]

Happy thanksgiving!!!

[@Tier1Norseman]

She cut it so well, even my pistons went flying!

[@britneyautomotive]

Haha

[@MrToppox]

😈😈😈😈 yeah girl , awesome mechanistic know how and thankyou for sharing it 😈😈😈😈

[@Pure_KodiakWILD_Power]

Get it, love 💪🏽 That is some hella tedious work, though 😂

[@britneyautomotive]

It is😂

[@butcher390]

I never realized 😳 how incredibly close these tolerances are 🤯 Thank you for sharing this 🙏 information Hope you'll have a very happy Thanksgiving , Britney 🌺🔩⚙🔧

[@britneyautomotive]

Thank you!!!

[@chancepollock4159]

Great informative video! I’m always learning something watching your content! Hope you have a Happy Thanksgiving! Super thankful for all you do for the community!

[@britneyautomotive]

Thank you so much!!! Happy thanksgiving 🤍

[@JoeBeech]

Great video never seen that before and happy Thanksgiving have a nice day 🙂

[@britneyautomotive]

Thank you!Happy thanksgiving!!!

[@ArizonaKid]

Good job and thanks for keeping it real , and I agree , everyone makes mistakes . Happy thanksgiving and God bless . See ya on the next one

[@britneyautomotive]

Thank you! Happy thanksgiving!!

[@Ivan-bp1hk]

I love you!!!!

[@randychong5395]

I'm curious, is it possible your fly cut depths could be off depending on the mating surface of the head and block? Ie. If they aren't decked and the heads aren't torqued to spec when cutting, wouldn't your valve to piston clearance change when the heads are torqued to spec? Keep up the good work, I enjoy your channel 👍

[@britneyautomotive]

You have to measure the actual piston after cutting and determine how to make them the same yes.

[@LexNoLuther]

Nice channel. Your super smart ❤️📝🥂

[@britneyautomotive]

Thank you!!

[@triggeral]

You're Awesome! Thank you for sharing

[@chriscorts3337]

Wonderful. Remember folks, sometimes you have to go slow to go fast.

[@britneyautomotive]

Facts

[@arthurrodesiler3109]

On valve relief pistons the deeper they are they keep the same thicknest on the piston under the relief. When you cut for more you weaken the piston. Buy the right piston to start with.

[@britneyautomotive]

👍🏼😂

[@muppetgump8522]

Great job 👍

[@britneyautomotive]

Thank you!!!

[@artegarcia2184]

hello Britney you are a very interesting person for what you do I like to see you in your videos greetings from Mexico 🇲🇽 sincerely your number one fan

[@britneyautomotive]

Thank you!!!

[@TheCanadianBubba]

Nice work, keep diggin' 👍

[@britneyautomotive]

Thank you!!

[@cedricwilson2055]

No mention of where to rent/ purchase that cutter. Isky may still sell one but hadn’t seen it in a while

[@britneyautomotive]

Lindy but isky does too

[@Jakeserragarage]

Holy dream girl!

[@britneyautomotive]

I appreciate it!!

[@rhettabney2838]

Rhett