Special LS3 Head Valve Tech And Problems

[@mohanperformance.enginerd.1308]

When you mentioned 8 and 12 degree intake valve head back angles. It made me think that would be a great test video to grind a dozen valves or so with different seat back cuts as well as no back cuts at all. Flow them all in a head with mellow and agressive ssr lay backs and show a comparison. That would be super interesting.

[@Mustang_Chris]

That's a lot of extra work to make the heads work right. Most people won't ever think of that stuff.

[@charlesgraham9954]

u say u want a dyno? first order of getting what u want in life, speak it aloud and mean it, picture it by daydreaming of a dyno in your head. think and talk about it so much, u start dreaming of a dyno. before u know it, ull have your dyno. i believe spoken word means more than we think it does. thank u for ur time sir. i appreciate u

[@dreece2000]

Lol

[@FrankM812]

Your videos make me feel like i know absolutely nothing about heads and have probably made mistakes on several engines i build. Never anything catastrophic but probably not making the power they could. Thank you!

[@WeingartnerRacing]

No problem.

[@Haaspeed]

learning something every video i watch. Thanks

[@ShellYeah03]

Built an ls3 with the 11 degree Frankenstein heads and had no issues with piston to valve using a normal aftermarket piston. Low-mid .600 lift cam. If I was a betting man these are the same castings as the m311.

[@baby-sharkgto4902]

Chief just mentioned you in a live. I didn’t know y’all was buds 👍

[@WeingartnerRacing]

Yeah I went down there a few weeks ago. He really does know chassis stuff.

[@baby-sharkgto4902]

@@WeingartnerRacing that’s really cool man. What was the intake that you suggested for him? He mentioned he was going to get the one that you suggested but he couldn’t remember the name of it

[@timothyarnott3584]

Hey Eric, Tim here.....yea, no back cut in NO BUENO!!!!......i learned about back cuts in 1982......my first motor (Pontiac 400) had stock heads massaged by Nunzi himself.....(my brother knew him personally).....and ALL my intake valves had a 30° back cut (none on exhaust)...."stock" Poncho's REALLY need that gain in low lift flow, it accentuates the BIG torque a Pontiac has......so BACK CUT THEM INTAKES EVERYBODY!!!.....you sound in good spirits, hope ur heart is back up to snuff.....take care!!!

[@WeingartnerRacing]

I recorded it before the heart problem. They shocked me yesterday. I’m normal now just sore.

[@timothyarnott3584]

@@WeingartnerRacing good, glad to hear back to normal!!!!!........take it slow, and i've read a few comments of maybe not swimming again.......i'm kinda with 'em....but you are in charge of urself....we just care.......PEACE to u sir!!

[@badassjr43]

Watching this video just saved my build I’m having your exact problem with the right size valves just ordered a set off lsxcelleration thanks for the info and keep up the good fight!

[@WeingartnerRacing]

Your welcome.

[@lamarw9901]

I have been watching about a year but didn't join youtube until a month or so ago. Yes I subscribed. Love the tech and head reviews. The amateur head review maybe the best. I was with a friend picking up a set of AFR LS heads up from D&A Machine Shop in Canton, GA from Andy Key. He surfaced them, checked the guides etc etc. We were talking tech as I'm always looking to learn more. For background, I am not in the industry and work on my stuff as a hobby to save money and out of a general distrust of local tooners. I may never port my own cylinder heads but I want to know if the guy working on my stuff is feeding me a load of crap. Anyways, I mentioned your videos and that I like you because you tell it as you see it. He perked up and said they did Engine Masters some of the same same years you entered. A cool small world moment and that the shop doing our work trusted the guy I was watching over the interweb. Made us feel much better all the way around. Keep up the good work and take care of yourself. Dad went afib and passed out the first time in a hotel in Indy as we were getting ready to head out for an F1 race 15 or so years ago. Yes our healthcare system sucks. BTW the Europe videos were interesting too. I'd watch more and if others don't want to I'll assume they'll have Europe in the title.

[@WeingartnerRacing]

Andy is good guy and knows what he is doing.

[@lamarw9901]

@@WeingartnerRacing We like Andy, he has surfaced 2 sets of heads for us and now refreshed (more less rebuilt) a motor for us. Always been responsive when we had a question.

[@lcelord3941]

if you're having a hard time finding LS valves I'm going to have a nightmare trying to get some titanium Ferrea valves for our C460 head

[@cjcoleman7372]

So for LS3/L99 what is a safe angle without having to change your pistons?

[@bdugle1]

I’m guessing these heads, with a little tweaking by Eric, are going to be pretty strong! Thanks!

[@WeingartnerRacing]

I hope.

[@bdugle1]

@@WeingartnerRacing you mentioned a-fib or getting hit with paddles again in another reply. I hope you’re feeling better! When my wife was having a-fib after a triple bypass they put her on Amiodarone. It seemed to work, no more a-fib once out of the hospital (a week). It was for a matter of weeks, not forever. Regardless, stay healthy!

[@say1o]

So just curious, are the AFR 8mm "sodium filled" valves just as shitty? I dont remember them having the dip like the lsxnation valves. I am not familiar with the hollow stem stuff.

[@dreece2000]

I think he was just referring to the fact you have to run so much spring pressure with a roller cam.

[@kylemilligan752]

Sir, can the liberty heads use the stock rocker arms?

[@taylorsrus9543]

They should use the stock LS7 rockers if using a hydraulic cam. Thats what most if not all the hybrid heads use.

[@stevenkirk2563]

I managed to put a back cut on Manley valves for an ls1.

[@WeingartnerRacing]

It might have had a different angle on the face.

[@KM-os4be]

Good video.

[@horsepowerfactorytx]

You sell the liberty(or any serious ls3) heads with your port? If so, link or how do I contact you? Regards.

[@WeingartnerRacing]

I sell just about all ls heads. I haven’t added them to my website because of time. You can email me at [e-mail]

[@prestonedmonds4128]

When you angle Mill LS heads what do you do about the composite intake? Is it angle milled as well to fit correctly?

[@WeingartnerRacing]

You fix the face of the head so you don’t mess with the manifold. Although nobody has ever asked me to angle mill ls heads.

[@chriswise1232]

Would a radius cut flow better?

[@WeingartnerRacing]

Yes but would hurt wet flow.

[@ezmny1387]

do you mean lsxcelleration? if so ive used their valves on a few LS's and had good success

[@WeingartnerRacing]

Yes

[@firsteg95]

Can you link to the video talking about the intake valve front cut picking up flow?

[@WeingartnerRacing]

It’s at the end of the one about opening the pushrod pinch.

[@firsteg95]

@@WeingartnerRacing great thanks found it. kzbin.info/www/bejne/eKXKi6OegLWjoac Around the 18 min mark for anyone that’s interested. Would be interesting to see a side by side comparison with the front cut vs straight.

[@salvatorehayes2753]

Have You Ported Any Stock Or Aftermarket Gen 3 Hemi Heads Before? Pre Eagle And Eagle 5.7 And Or Apache 6.4 Hemi? Been Watching Your Videos And Getting Lots Of Awesome Tips. One Day I Plan To Destroy A Set On My Jeep hahaha (hopefully not) They Would Be My First Ever Porting. My 04 Monte Carlo Has CNC Ported Heads. They Had Some Shrouded Valve Areas Casting Marks That I Could Have Smoothed Out / Blended For Some Flow But They Are Cast Iron Heads And I Waited 2 Years For Them And Alot Of $ So The Fear Of Screwing Up Was Too Scary haha. I Know All The Basics Apply To 99% Of Heads Just Looking For Hemis Specific Tips And Warnings.

[@WeingartnerRacing]

Nope people keep saying they are going to send me some but it never happens.

[@cassandraclark8568]

Xyldyne usually have a full range of Ls valves

[@WeingartnerRacing]

I will look into them.

[@noname-nq5zn]

@@WeingartnerRacing If you a 4.8 ls 2002 Takes coolant can't find leak external any were could it be anything but a bad head Also how could I order ported heads from you and also do you have a kit that has everything I need for to replace them

[@TheJohndeere466]

HAve you ever heard how much an exhaust port should flow compared to the intake on a turbo diesel. Ive been told that they should flow the same. I also watched a video about a recast cummins head and they said the exhaust actually flowed more than the intake. Any thoughts on this

[@WeingartnerRacing]

I haven't heard that but I don't mess with diesels.

[@TheJohndeere466]

@@WeingartnerRacing If you were going to flow a head with the intake manifold bolted to it, would you have valves in all the other cylinders to prevent air from coming into the manifold from the cylinders not being flowed or wouldnt this be an issue.

[@cdownin]

Bro you are funny im sure you meant lsxceleration lmao... I just bought a set from them and i bought a set from manely. im just going to polish them with 5000 grit and lap them rubbing compound like the dirt bike kids

[@crownvictorialifestyle4421]

You're making a back cut seem like it's the end of the world it is truly not It is more work for little gains

[@WeingartnerRacing]

It’s the easiest way to pick up power.