Chevy LT-1 Cylinder Head Full Porting Stage IV

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This is the full blown Stage IV Max Street porting of the LT-1 Cross-Flow Cylinder Head. Part One....In this we cover the begining to end of unshrouding and polishing the combustion chambers. Thanks to Tom Kish for the use of his heads and the extra time he allowed for me to film and perform these mods, and his permission to display his heads and work performed. This procedure removed 3cc of material, and blended the chambers to discourage detonation. This is part one of three of mods to turn a stock 170cc LT-1 heads into Edelbrock, AFR killers. The valve size remains the stock 1.94 and 1.50 sizes. To follow more go to www.headbytes.com 615-212-7168

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11 сен 2024

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Комментарии : 55

@HeadPorting 11 лет назад

Thanks, I am 52 and I don't want to take it to my grave after the price I paid in life to learn this. NO BOOKS, NO ONE TALKES ABOUT IT (when I done it).

@sagarpn3162 8 лет назад

The work are displayed in a vivid style using precession tools by experienced professionals.I like it . Still watching the connecting chapters....

@HeadPorting 10 лет назад

Thanks guy, I do this for you DIY guys.

@Midnightm4 8 лет назад

Headbytes Porting

@HeadPorting 11 лет назад

Thanks, I try. I realize I am giving away a LOT, but I just figure for those of you that don't want to try it, I am here to do it for you.

@HeadPorting 11 лет назад

I CC one or Two chambers and intake and exhaust ports. My math procedure is so accurate it never fails. When I do a Stage IV, I shoot of the hip with 3 or 4 pick up points (the points where I measure to assure consistency) Time is my enemy here, and I have to look at the money I got for the job. On a V, it is done every .300 through the ports, hence the expense.

@Carpathian2010 11 лет назад

I watched this video of a guy trying to explain how to gasket match ports, it took him 15 minutes to use his magic marker to mark up one port. I left a comment for him that he should of used a bigger magic marker. I watch his video now and then when I need a good laugh.

@DoriFord 11 лет назад

Yeah, that valve design on BBC is just brilliant! Thank you for your reply. I have some Audi 20V 5cyl head on my table and want to add some squish areas and pretty much improve overall burn process. I consider this head to be somewhat stupid in design, because it has a huge volume of CC way away from the plug. And a small quench, while it could have few! So I needed your re-explanation of that. Sometimes we need to blend our thoughts as well! Thanks!

@HeadPorting 11 лет назад

I am honored, really guys. Hey, if you have any burned up rods laying around that you was going to through away, I use the aluminum to pour cross-overs in my old heads (to fill the cross over path to stop the exhaust gasses from heating up the manifold). If you sent them to me, I would send the cash to cover your shipping cost. About 10 or so would be GREAT. Thanks and I plan on doing a let before the end of the year.

@kirleyq1394 9 лет назад

Ive been following these videos since the start of my lt1 heads! The end result is amazing but im not quite finished yet, I was so far off in the videos I posted on my channel but when I visited your website I was able to see it all in detail and its getting better! Thanks for the tutorial! Im shooting for 400 hp with a 231/239 cam and full bolt ons!

@alexsayers6979 8 лет назад

Thank you so much everybody is calling a polish job porting.

@pvendeloo7512 9 лет назад

jafromobile is pulling his hair out while watching this

@DoriFord 11 лет назад

Uh huh! That's an interesting point on that hump near plugs. My friend once brought me LT1 head, so that I could advise him something. Yet there were not many things that's possible to do with the intake port (w/ no epoxy or welding), so all I could advise him were those ridges around the seats and wavy hump around the plug. Anyway, I think that if you could WELD that hump into a flat surface, you could get a second squish area and improve swirl inside the chamber. Correct me if I'm wrong! Thx!

@gmansr1661 11 лет назад

these videos u do are the best out there.keep it up cause im spreading the word about it.

@DoriFord 11 лет назад

Yeah, I understand that as an aim to have the shortest possible flame travel distance in all 3 dimensions, i.e. inside the volume. Thanks!

@HeadPorting 11 лет назад

One thing you need to know about this is S/V ratio, or the ratio of the burn rate known as Surface to Volume ratio. This determines the effectiveness of the burn in the chamber. I believe it goes like this: the less surface of the chamber to the volume of the bore means it burns more effectively. For example the Chevy 18 degree heads have a LOW S/V ratio, making it a high quench head that burns like no tomorrow. remember that NO combustion chamber is a great combustion chamber in terms of BOTH

@HeadPorting 11 лет назад

Continued from DoriFord comment below: That being said, the quench effect has several major benefits for sure (Less Timing required to achieve max horsepower, the engine runs COOLER for sure, Throttle response in greatly enhanced, and compression is increased); however you can only compress what is sent in through the intake cycle I the first place so I would say (and this is my opinion) that first and foremost Air-Flow is king (or C.S.A.). The problem with too much quench is valve shrouding.

@HeadPorting 11 лет назад

Part III of Quench: The problem of quench is, like I said above is Valve Shrouding. I know you herd of the "CURTIN" of the valve, well there it is (or in this case, is not!!!). The valve on any head has to have a certain amount of "Curtin" to let the air/fuel charge exit around the valve. That is why the BBC is such a bad ass head, because of the canted valve rocks in terms of unshrouding the valves as it moves toward the center of the chamber once it leaves the seat. The best is a good mix here

@stanthology 8 лет назад

Well done. You make enjoyable videos.

@servediocylinderheads 10 лет назад

If you do it right it IS rocket science!

@alnov91 8 лет назад

Thank you. your an excellent teacher. I shit you not, these videos should be bundled and sold as academic media. dont change a thing. Fan Alex in Va Beach. ps, raise your price. this kind of quality is worth triple.

@DoriFord 11 лет назад

And blacktop has more power than silvertop. Of course, there were some other mods, but the engineers were crazy about quench area back then. Possibly, you get pretty big flow numbers with 3 valves on the intake, so you can sacrifice that a bit for smaller CC and faster burn. Just google it, it's an interesting evolution of one head. Both engines were available in a period 1992-1997, mostly in Japan.

@DoriFord 11 лет назад

Haha, thanks for your reply! In terms of whether airflow or quench, you choose airflow? You know, there is an interesting point on CCs on Toyota 4AGE 20V engine. There were 2 versions called Silvertop and Blacktop. S-top was the first gen for 20V inline-4 engine, both came with individual throttle bodies from the factory. The main difference is CC design. Silvertop has an opened chamber with small quench, Blacktop has more squish than any other engine I've ever seen. Might impede flow a bit!

@BigChevyFTW 11 лет назад

I Love your videos this is truly a lost art!

@HeadPorting 11 лет назад

The info is above in the info box below the video. It wont let me post a link here. Just click the "SHOW MORE" and my information is at the bottom of the page. Just look up headbytes on Google and go to my contact us page.

@charlesservedio1222 11 лет назад

Sounds like a safer mix. I will need to try that !

@HeadPorting 11 лет назад

There is a LOT of companies that claim BBFTW to be head porters, but I would be nice in saying that out of 100 MAYBE 3 of them are "CUTTERS" that is a slang that our beloved "Mondello, Sheperd, Glidden" and other guys used to call people like me. Were the last of our kind. I claim to be no better than the next guy, but what I am saying is "you have to cut the shit out of them and remove CSA to make them work, period". It is all about CSA, you need sonic testing stuff, and math to do it. Thanks

@HeadPorting 11 лет назад

Hell Yes!!! your exactly RIGHT. I love quench, and IF it does not impede airflow then squeeze that bitch till she screams......Right On DoriFord...May the force be with you, always..

@HeadPorting 11 лет назад

That would be race only, with epoxy on top of the runners, and probably around $1200.00. IT MIGHT be able to street, it would depend on the Sonic Test...

@phatcowboy76 7 лет назад

If you take metal out of the bowls, aren't you increasing/gaining CCs of chamber volume? You said you were going to lose a couple CCs. Great video.

@HeadPorting 11 лет назад

The shipping address is right beside the email or contact info you used to send the email, right beside it as it says "SHIPPING ADDRESS". Thanks

@CEO_of_Shitboxes 9 лет назад

I can guarantee you that a real mechanic only has your best interest in mind. yes, it's a business and we need to make money so we will upsell anything your car needs but we will perform all repairs promised. also as an ASE certified mechanic I definitely know more about cars than Joe Blow down at the local Jiffy Lube

@servediocylinderheads 10 лет назад

We could continue this but not tonight.

@BNforever2009 9 лет назад

wow!! Woyuld love for you to do that to my heads (94 Chevy 9C1 police Intercepter--LT1 350) have the heads port matched with my Hooker headers which are ceramic coated, need a good cam and lifters, push rods and roller rocker arms and need to add 100hp to the rear wheels, using 3.42's and 245-60 R15 tires. Using a H-pipe and 3 chamber mufflers too. Car will be used mainly for long distance cruising and occasional drag racing-about 4 times a year, bracket quarter mile racing.

@Carpathian2010 11 лет назад

Trumps all other videos on youtube about porting. This is classroom material =).

@nezerac 10 лет назад

wow....SUBSCRIBE!! lol. That looks gorgeous!!

@scren99 11 лет назад

After you've cleaned up the chambers,do you cc the heads again to make sure all the chambers are equal?And the same with the intake runners,and valve pockets?

@jeffparker4840 9 лет назад

I know you get this all the time.. What do you get to do a port match and cleanup on a set of 5.3 LS heads?

@rfrank1980 11 лет назад

I have a question, where can I find those long shank porting stones? I've been searching all over and I haven't been able to find any.

@cid4887 9 лет назад

was that a sacrifice valve to protect your seat or actual valve to be used afterwards, cause you are grinding it as well.

@jeremypacker5375 9 лет назад

any do's and donts for vortec 062 with stock valves. 10.0 to 1 compression lt 4 hot cam. and edelbrock tpi ? novice with a cutter but good with my hands

@seanboyce2895 11 лет назад

do you still do heads. I really like what you do. if so send me you info. I want a set done.

@bigdoo350 11 лет назад

Hey nice vid, how much would you charge for lt1 stage v porting

@FixItStupid 9 лет назад

Thank You Sir YOU ARE A ARTEST far more than an engineer craftsman technician you're THE really Deal Wonderful Thank You TO SHARING THIS KIND OF INFORMATION You Surely Care & Have A Good Heart Sharing IS Caring ..... Thank You Sir

@charlesservedio1222 11 лет назад

Cutters and math? Are you sure that is a good combo?

@HeadPorting 11 лет назад

Hell No, I prefer Vodka and V-8 (wow, I could have had a V-8)

@HeadPorting 11 лет назад

Try CC porting

@HeadPorting 11 лет назад

Yahoo just changed there dam email, homepage and EVERYTHING and I just got about 20 emails at once, I just sent you a reply this morning, if you have any problems after today give me a call. Thanks.

@Imuneplague 9 лет назад

murica!

@leonspringsboystv2025 8 лет назад

Dislike due to lack of "China Valves"

@HeadPorting 11 лет назад

I get this all the time, I just don't understand this. These videos are not that good, at least not to me, really...I have, understandably look on RU-vid for other videos, and your right, there is noting except heads already one or some jackass talking smack with no insight about the subject...Go figure...