Hey Eric, I appreciate the matter of fact way you lay out the results, that's what I like to hear. I ported that head about 4 years ago, before I knew how important the valve job is. I'll email you on the cost of a proper valve job, for the I & E, and maybe I'll have you run them again! Thanks for making this service available, I learned alot, and I feel validated on my understanding how gases flow out of the exhaust port

If you had a shop full of silicone, someone may get the wrong idea of the type shop you are running! 😆

Eric, David vizardndoes say to lab in the valbe and make sure the contact area is the correct width if that helps any. That and he does that after the valve job. He wouldn't do that if it didn't make any more hp knowing how he is.

Forensic patholgy of some "my buddy" work, nice, I bet there was some initial looking over, some *WTF!* moments, and then a "This will make a good KZfaq vid" and honestly, it's my favorite kind of content. It really reaches the guy who needs to get in his garage.

The valve job vs. grinding comparison was definitely revealing. Myself, I’ve always considered the valve job to include the throat and the top cut to include the chamber walls adjacent to the valves out to the bore line, for anything beyond a basic valve job. Thanks to you and the victim, for sharing. Hopefully he continues to develop his skills. You need to emphasize, that the skill and art in this, is being able to repeat the exact same things across eight cylinders. A grinder / bur is a subtractive paint brush.

Very nice to see what the valve job does over the smoothing. Porting cast sounds like a labor of love. Thanks for the continuing education.

Great vid Eric. I like these videos of people sending in their work

Good video Eric. The guy did a pretty good job. I like your emphasis on a good valve job and the importance of having one. Thanks for sharing. Take care, Ed.

Excellent video sir. All in all, after his pocket porting work which did result in increases in CFM after .300, a good valve job should have brought the initial low lift numbers back into Respect City. Very informative video, confirming a bunch of things I have learned in the past, and enlightening me even more in other areas! Thank you again!

great video and I love the way you critic the work. open honest feedback is the best way to learn without ridicule. and you did not make fun of his work or say he sucks ot anything like that. so very good. I know it would be a lot of work, but personally i would like to see what one of your valve jobs actually does to his work and see the actual numbers instead of a comparison to someone else's work. I don't expect it to be much different. but you cant compare someone apple to your orange and call the differences the same. you can use it as a prediction, but not a 1 to 1 comparison to show what a good valve job is really worth.

30 years ago when I did a few bracket engines the cam I used 99% of the time was a Cam Dynamics 284 iirc. CD had been bought by Crane sometime earlier. Iirc it was 234* at .050 and 480 lift. I could buy the cam and lifters wholesale for $89 :). I never had one fail but I did have a test stand and my cam break in regimen was 2500 + for 45 min. Then let the motor cool overnight and the next day retorque the heads, warm it up, hot lash the valves and it was:ready to go in the car.

I ported a set of 906 I did a lot more work than that and I will never do that again. 😬

Thank you so much for the information. For us overlooked people who can't buy good aluminium vortec heads for the 4.3 chevy v6....I know BRO..Made aluminum heads but not vortec bolt pattern and hard to find.

PAC makes a beehive valve spring kit for vortecs that allows you to have .560 lift without cutting the valve guides.

Thank you Eric for an awesome and informational video on a head an average broke guy like me can use. Ever think about analyzing a Pontiac bathtube head and what one would need to improve on it? Anything would be much appreciated!!!

Excellent review 😊

Very interesting. I think your critique is really good snd not harsh at all. Would be interesting to see what a valve job would do. Maybe convince the guy to let you cut new seats? I do like these videos so ggod säger ne 👍

the port job was pretty good to be had id like to see the new valve job suiting the port numbers

There is also 520/059/113 head casting for the 305 engine. They have 1.84 intake valves and 58cc chambers. They are vortec heads with the vertical intake bolt.

Enjoyed seeing this. Thanks

Truth. Very helpful, thanks!

Great video

Wow so much information makes me wanna get grinding

6:37 I have a cracked 062 casting that i plasma cut a big hole in the side of the head and the intake and exhaust ports are not solid there , they are however really close together so not a lot of coolant is gonna flow there confirming your cracking theory , the wall thickness is pretty thick so thats probly how a fair amount of material can be removed on the bowl side.

Explain the reason why flow actually goes down when the valve is opened more. Great review Eric.

Eric, please do the valve job and show us a diagram of the angles and widths please

Some heads come from the factory with 5 angle valve jobs...Dart Iron Eagle 230 as an example. Is it worth redoing the valve job on that style of head as well?

Eric, what angles should a valve job be if I were to only port match and flowball a set of 906. Thanks for all the info. I watch alot!

You know, you can flow the head 1st before porting & then after porting to gauge your work, you can always put the VJ in afterwards. I know it's not the usual way of doing things but you can clarify your port work without a VJ

OOOO, great Video! i think i missed the first critique video but now i will have to go find it. This is tempting me to send something in as your feedback would be priceless. Question is, what to send...... I doubt you would be able to mount a big block Olds head to your bench, am i right?

@erickweingartner u cant have anymore lift than .450 lift, even if u get vortec beehive springs?

What do you use for molding material?

Eric i have a 317 ls head I would like you to flow but would like you to flow all 4 ports as they range from stock to more and more modified, and heres the kicker, I opened up the the seats to 90% using a hole saw.

Right on

I have told countless racers that the valve job matters most, in no way being a smart-ass. All the action and air matters there.

Not only is their a difference in 906-062 their is a big difference is Mexican head vs factory head from 96-2002 flow more! If I knew why I know now I wouldn't of touched a Vortec head. A ebay aluminum head flows more than not only mexican vortec they also outflow factory head by a few numbers!

Good review. $30 is a good deal for that.

Why do the Vortecs fall off so much after .500 lift? Does the spark plug boss have anything to do with it?

Thats interesting maybe I will skip trying to port my heads and just do a 3 angle valve job call it a day.

I’ve gotten used to shortness on how you talk, I feel where your coming from.

I have a set of ported Mopar Performance heads I'd like to send in but I don't think he has the proper plate to flow them. Flow numbers are unavailable.

Lol I been grinding valve seat & flow test & port 32 years all my head so bullshit, you can do a valve job in a home shop 0.000 0.0005 Concentric I fix more seat guide machine work then any thing there out 0.005 0.010 always lol it called skill

Cut the seats and show the improvement

do the valve job good video

please make a vid on a worn valve job and with a drill lap the pee out of it like the how to hack vids do.,,flow then do a valve job repeat, cant tell those guys anything

Dude! $30 to flow a head? Some local guy wanted $125! Of course I told him where to go but still, lol. That's cheap, man!

I just made a video of my V6 Heads I have no posted it yet. Would like to watch if and tell me what you thing Eric?