AFTERMARKET LS HEAD TEST-STOCK CATHEDRAL PORT VS 10 SETS!

All I have to say is: WOW. The sheer amount of work it would have taken to do this is crazy. THANK YOU!

I believe that Richard understands these things because, he himself, is also a machine. There's no other explanation for this gigantic amount of testing in every video. He's not human! I'm glad to see this channel grow. It is one of the most informative and interesting engine performance channels on Youtube.

A few things: 1. This channel should have 1M subs. Every day is another interesting video and this one was amazing. I mean the sheer time and expense of conducting these tests is staggering, but Richard delivers the info in a free 20 min video 2. It's funny as hell that they are all basically the same. Gear heads have been searching for the secret cylinder head forever. 3. I was in the engine business until about 2010 and just started to get interested again this year. The amount and quality of aftermarket parts has exploded, as has the amount of actual scientific information. Pretty remarkable

Single handidly making head builders step up their game.

All I got out of this is save your money and port stock heads. And that every company is making the same product.

This must have taken a very long time to do! Thank you, Richard.

Once again you shatter the bs. The best reason to watch your shows. You give the facts and let them be what they are. Fact or fiction. Keep making your videos and I’ll keep watching. Thank you.

There is a great article that was published around 2001 that details the developments of the LS6 head from the LS1 head, and why GM had to make certain choices and decisions to balance power vs exhaust management and emissions regulations. They learned some things from Lingenfelter, specifically that atomization as a result of the spray pattern from the injectors onto the back of the valves was not as influenced by the intake port design as they had originally thought. They further refined the port profile to reduce air restrictions while being careful not to disturb the spray pattern and this allowed them to increase the hp from 345 to 385 to 405 from 2000 to 2002 (with slightly different cam profiles), although they were still using pup cats after the exhaust manifolds to help comply with LEV restrictions. GM produced one hell of a head, knowing full well there was plenty left on the table, but not able to capitalize on it because of the cost of producing CNC'd heads vs cast. In the end they still had to produce a product that was cheap, met LEV regulations, and then made decent HP.

you deserve a Nobel peace prize for tireless work .thank you too much .

TEA did with a 2.055" valve what Mast did with a 2.165" valve. my hats off to TEA! it seems to be a clear leader in this test.

daaaaaaaaaaaaamn, this dude never sleeps. lol

Just the test I was looking for. Very informative and helpful. Great Work Richard. Keep'em comin

Thank you, Richard, for all the great information, sweat, hard work & $$ you do! Bravo!

You have done the work to answer the questions we all had. Congrats to you sir.

Thank you for all the work you put into making these videos. Thanks to you I’m in the process of building my own 408 stroker for my Toyota pickup. Keep up the amazing content!

Awesome video! Exactly what I’ve been waiting for, this should make shopping for heads for my 6.0 way easier.

That was an excellent comparison! Thanks Richard. Cheers😊

your videos are excellent man. a person can confidently build something spectacular by using all the things you share for free. great work👍

Great work Richard. I really enjoyed this video, tons of information as always. Thank you.

Wow, you are a legend. Thank you for putting so much time into this video. All the power fiends love your work.