How to port your LS cylinder heads! In your garage by hand! +40cfm!

[@brad1367]

youre one of the few that actually showed it from the start. the part the us noobs need lol so thank you!

[@corytaylorbuilds2566]

You're welcome! Glad I could help!

[@MiguelSanchez-rb3tw]

Only video i saw that showed exactly what i wanted to know and see. Thanks🙏🏼

[@jeremygourde9880]

I hear a lot about leaving the swirl ramp. I’d like to see numbers on these after the “port” job to see actual numbers

[@arturozarate1752]

@@jeremygourde9880 the swirl ramp is good to keep in most street applications. Removing it completely is tricky. Some get lucky and miss the water behind it, but the risk vs the gain reward really isn't there. The cathedral port OEM casting flows great with the swirl ramp partially removed....and just a little bit better completely removed. Man....I might have flow numbers on an old laptop. My ex-wife set fire to my shop and collection of data, images, etc.... In 2001 when I started porting these heads while I was in school, I took the complete removal approach. It was several dozen heads and a year later that I started to question my methods.....

[@nathana2977]

Dude thank you for making such a detailed video 🤘

[@corytaylorbuilds2566]

You're welcome!

[@wilsondriver654]

Get some single cut aluminium burrs! Will be less prone to clogging.

[@arturozarate1752]

@@wilsondriver654 yes, but a thin film lubricant like Royal Purple Max Film sprayed occasionally will clear the double cut burr and keep it sharper, so it can last longer, so it can do more work...... Welding tip gel works great too. Ultimately a non-ferrous burr would be the right tool for the job, but they can be intimidating to the uninitiated. They're sharp when new, and that first bite ain't always "love".🤣🤣🤣

[@christos8189]

Rookie here interested in the LS game. Not trying to be negative, but why did you just chunk up the valve stem seals? Do they just press in and are easy to replace?

[@eleventysixpl]

Is that 🐀 💩 in the intake port lol

[@jesussandoval2629]

What kind of sealant you use for the rocker bolts?

[@gordocarbo]

permatex thread sealer

[@checkmatenate]

Nice

[@jasonmcintyre6458]

does porting increase combustion chamber volume and possibly lower compression ratio

[@Artoconnell]

No, in this case it will slow the intake velocity down, and all those sharp thin edges are stress induced cracks waiting to happen.

[@arturozarate1752]

Grinding the combustion chambers will effect CR. Porting is work done to the intake and exhaust runners.

[@DWBmotorsports]

@@Artoconnellhey art, I noticed you didn’t have any porting videos up on how to properly do it. When are you gonna upload one?

[@Artoconnell]

@@DWBmotorsports Your fine, drill for water. just wallow them out. WHy would i upload anything to this BS site?

[@Artoconnell]

@@DWBmotorsports Mu all time fave is when people smash numbers into the top of the piston. acts like a mini glow plug.

[@adammcdowell8620]

Bro, did you ever run these heads? That bowl looks pretty large in the video, so I just wondered if this engine was a little on the lazy side on the bottom if it's an N/A deal! I'm not being the YT know it all, I've always tended to probably ask too many questions, but I generally end up with a pretty good understanding of things in the end. Did you just do this set for the video? I'm surprised that you didn't get a valve job done. You can normally pickup roughly as much power there as doing all the other work and you got a valve job done! We know that all LS heads need a valve job if they have any miles with the way they pit on the exhaust side and the only contact the valve is usually making with the seat is a little pencil-tip thin ring way outside. At least that's my experience with the ones I come across. I'd imagine I rarely see one under 200k...

[@wesleycreasey403]

How long did it take you to do both heads?

[@corytaylorbuilds2566]

Took me about 5 hours of work total, including removing and replacing the valves and springs

[@jesussandoval2629]

Where did you buy the grinder tips or bits?

[@BillyP-49Chevy]

I can answer that for you but I just bought mine off Amazon. I just got the long style four different shapes and really he's only using two of them for 50 bucks.

[@ernestorodriguez8228]

What kind of burrs do you recommend?

[@wilsondriver654]

You need a single cut burr for aluminium ideally. This guy is using a double cut, intended for steel. Can clog up easily with aluminium.

[@ssman9925]

WoW 🤩 thanks bro 😎

[@keyschar7493]

Wow thank you sir

[@RAWRMotorsports]

Don't open the throat more than 90% of valve size

[@1flynlow]

seems like that hole you make in the intake ports might cause turbulence.

[@corytaylorbuilds2566]

The hole ends up being plugged in the end because that is where the rocker bolt goes, and the rocker bolt threads go all the way down to where that hole is made, so it doesn't end up being open at all!

[@arturozarate1752]

Negative. The air doesn't even "see" it.

[@Turtles_Hotrods]

@@corytaylorbuilds2566my worry is this would affect the strength of the hole. Have you dad any issues with the studs pulling out.

[@corytaylorbuilds2566]

@Turtles_Hotrods no problems at all. the hole is towards the end of the bolt, so there is still plenty of meat left for it to bite onto!

[@adammcdowell8620]

That "hole" is present on the port work of EVERY LS head porter in the country! At least the ones good enough to speak about..

[@arturozarate1752]

Don't pat yourself on the back just yet. If you think youre gaining 40cfm from doing a "cleanup"......then fully ported cylinder heads would be gaining 100 to 150cfm or more!😂😂😂😂😂 Fact check that 40cfm. More than likely you hurt low lift flow and the intake port will stop flowing at 0.550". It'll back up 60cfm less @ 0.600" and never recover. The swirl ramp you removed aids swirl which mixes the air/fuel charge amd promotes better burn....smh. The short side air speeds will be much higher as well as the roof air speeds and theyll collide in the narrow and turbulent bowl that wasn't sized. All the flow you potentially gained will be beat into submission at the small throat, and what does make it out may net you 5 more ponies. Excellent example of what you shouldn't do to a cylinder head. I bet its good to brag on though.....👍

[@gordocarbo]

Well said..simple bowl and ssr work with a premium valve job will net him much more

[@arturozarate1752]

@@gordocarbo I know there's a lot videos and hype all over forums, but I've been doing cylinder head work for 20+ years. If it were that easy to gain 40cfm.....I'd be rolling in the dough!

[@DWBmotorsports]

@@arturozarate1752that must explain why you have so many cylinder head porting videos huh 😅

[@arturozarate1752]

@@DWBmotorsports probably....

[@arturozarate1752]

@@DWBmotorsports if posting videos is proof of years of experience and "hard lesson learned" acquired knowledge, then we're all in trouble. I'll consider making a video or two, but there are PLENTY of videos to view here. If that's your thing? I firmly believe my words speak for themselves. If there's anything you feel I've wrongly stated please let me know. I'll consider making videos, but I wouldn't hold my breath.

[@ArthurFleck-tx9di]

Ruined the integrity of them heads. Im sorry i dont trash talk but there is no way the gains are worth grinding through the bolt wall and loosing that strength..

[@corytaylorbuilds2566]

@ArthurFleck-tx9di no strength is lost, cnc port jobs will do the same thing and go through into the bolt hole. As well as with old smallblock chevy heads!

[@ptbelttactics]

You are just plain wrong. That bump decreases the CSA, and bolt only needs 1.5x the diameter in thread engagement for full strength.

[@aidanattalla5275]

Stock vortec 350 heads rocker stud is actually exposed in the intake runner without porting :p

[@ArthurFleck-tx9di]

Just no

[@peteJoseph-x3h]

Your heads will flow about 290 max, 310 CFM is very possible with more work and better detail and a little math….just sayin.

[@arturozarate1752]

Ehhhhhh.....you're being awful generous! No short side work, bowl, throat, valve unshrouding, chamber work(spark plug boss and machinist ridges)......there might be 10 to 15 cfm of work done. Low lift numbers will suck....and no valve job. Generous.

[@171apples171]

I just cant help but look at how motorcycle ports/bowls and other high performance stuff "looks"... Everything is smooth.. im impressed with his work but the comments make me unsure lol.

[@CDShawnsshop]

​​@@171apples171only respect comments of those who made their own video.

[@gordocarbo]

Not hardly

[@trailerparkcryptoking5213]

@@arturozarate1752 🎯💯. I was waiting for him to check throat/valve ratios and open that up and then blend, short side work is extremely important on LS heads... + some chamber work....

[@daveerin3518]

Dont remove the swirl ramps on intake bowl .

[@ptbelttactics]

The swirl ramp is to improve fuel efficiency at low rpm, and hurts flow opposite the short turn at high velocity and lift. Every good porter takes it out.