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What cast iron BBC heads are these? That combustion chamber does not look familiar to me.

I trust Project Farm

how do you calculate secondary pipe length? Did not hear on the video.

One nitrous deto will bend those into an s shape. Ask me how I know. lol. Love the vids!

Audio is missing or really low on some videos just music playing

Chrysler used a mushroom lifter. Years ago a friend had a drag racing engine that Maurice petty had built using mushroom lifter. He decided to swap to roller set up. After we got finished there was no difference in power and he was angry he wasted the money on swap.

Hello David. This is excellent information! Thank you for this. Do the other companies that make multi-electrode spark plugs perform as well as your reshaped specials or even the E3s? Is this something you have tested? I'm guessing this becomes much more important when stuck with a non-transistor system.

Thank you DV for the mini-series on lower end assembly. I am rebuilding a Saab 2.0L B205 and have been using your tips. Had an issue using the 40ft-lb recommendation with plasti-gage (red), it was showing about 0.004"-0.005" clearance, not enough compression. Repeating using full torque and was able to get around 0.0025" (the target). Some online forums mentioned similar issues and recommended full torque or the results were similar. I am guessing the 40lb rule is somewhat engine type specific. I will try out the 40ft-lb tip on my next SBC or SBF project. Now the question of why it didn't work as expected.. my guess would be the bearings are simply different width and thickness requiring more or less pressure. I am sure this technique would work with almost all engines, but some trial and error would be required to figure out what the acceptable level of torque is required. Interesting results, thought I would share. Just also thought thread pitch and diameter variance between the engines might influence this as well..

Id get in trouble, grade school for reading DVs books in school hidden in my class books. Teacher and my Dad thought I was a strange little man. ID go to the bookstore in the northridge mall or the local chevy dealer and buy everyone I could, even Smokeys, Gms performance catalogs etc.

Vizard! I've always said it wrongly- to rhyme with WIZARD........

Is this channel a scam????? It's different than the original.....Hmmmm

Thank You King David:)

Vizard again teaching the world the way it’s supposed to be. Can u imagine how much horse power and torque has been lost because of all those lazy tard cams they made for DECADES. Excellent stuff I’d LOVE to do a back to back test on a dyno to prove it to the naysayers :)

What happened to the bowl mods?

Please do vortech aluminum exhaust porting

Would this motor perform in a 7200 4wd 3/4 ton truck and still pull Camper,what camshaft do I need for my application??

The next time I take my mini van to the track, I'll stick in a K&N filter. In the meantime, I'll stick to top rated conventional air filters

I'd love to be a fly on the wall of your shop!

dave, why havent you made a "i dont have an opinion i have a dyno t shirt? that was hands down the best way to tell someone to get out of here w your BS ever lol. best quote ive ever heard by far. one thing ive learned over the years is know it alls dont know jack schmidt lol!

Excellent work David! It really works!

David any thoughts on PC products PC-7 for light port filling in an intake manifold? I did some research and found favorable comments on this epoxy. Price is good also! This would be used in your "light filling" application

Chip Barret-Smith applied Whitcomb Area Rule in Ohio canted valve chambers circa 1970

Great episode. Cam function is really critical and so difficult to grasp.

Flowmasters makes high pitch sound that changes the tone and makes the engine sound mean and desirable, to me the flow perfs comes after . On my lmp race car I use a walker because the goal is to be under 95db and no power loss

You are the Engine Father I never had. Can I have an allowance?

About 99% of the gear heads on the internet will debate that engines like a little backpressure! I ask them if they have had college level physics classes or a fluid dynamics class? On planet earth back pressure reduces flow which in an engine reduces power. I ask them why would you do H/C/I work to increase flow to only choke it back in the exhaust? They can never answer that question....they usually say well my uncle was a mechanic for 40+ years and that’s what he told me....😂😂😂. If back pressure is good then stick a potato in your exhaust pipe and see what happens. 😂😂😂

So does the header collector still have to be a tuned length, calculated? Prior to the termination box (resonator).

Interesting do you know how big the hole wss he drilled in the plug negative electrode? Just made me think what about if you had a hole in the electrode and the center electrode came up through the hole so you're given gap is the size of the hole to the size of the electrode, and if it was tapered from the inside you could have some adjustment on this gap and the spark would be right on the tip the flat part.

On a lower hp engine would a double roller chain be a consumption of power where a single roller could do the job just fine?

A Day and Night difference of understanding Exhaust backpressure and muffler design

Thanks for the heads up.

Excellent video with Dyno-proven results. My question is what is the measure of a chain that is too tight or too loose? How much range of deflection is preferred between the cam and crank gear and how many pounds of force are required as a standard to impose the deflection? 10, 25, or 50 lbs? What is the maximum “allowable wear” measured in deflection typically? Also, I realize this would be a variable on all different engine types as the cam and crank gears vary in spacing and chain length.

Just on the dyno: 355ci sbc 9:1 compression Trick flow 175 dhc heads Isky 258/262 208/208 @0.050 .464/.464 lift w/1.6 roller rockers 107 lsa with 4 degree advance 400 ft/lb @4200 360 hp @5100 16" vacuum @800 rpm 15° initial timing 34° total

Have an 010 block handy, going to basically follow this build, 500+hp is my goal. Be a fun daily driver, probably high 11 sec car or so.

Should I run a pcv valve on my 383 build?

all in favor of any and all seminars

I assume the pressed in studs are adequate for the job.

getting to grips with a rotary way out on the boondocks of NZ , I found it best to build my own straight though with lots of stainless polypads , the brass ones got flattened in days , any normal glass pack large mufflers fell apart . I made a few attempts at internal reflection cones too , were ok but stainless is to noisy . And with turbos have found a big expansion tube after the turbo is good . now it seems there are ways to design noise reflecting grooves at about the size of the sound waves , Gismag/new atlass had an article a few years ago ,would like to know more ,could greatly simplify the muffling , even make effective aero mufflers , next project I hope . Thanks David ,great info, and attitude , we say you attitude determines your altitude ,and fame without good character will destroy you .

best 🚀🚀🫡

You answered several questions

Old Crank - "in my day, we used flannel to filter our model T"

Do you have any experience with 4 liter Jeep 6 cylinder heads and also their 5 liter v8 head? Will look for an answer in this column. Thank you for all your info on small block Chevys.

🇦🇺🙂

You said in your book that balancing is a waste for street cars. Make up your mind.

Please dont use the lords name in vain !

Brilliant!

Aren’t Baja engines rebuilt ever so often, meaning multiple times a year which would mean that this story might not apply to every day engines that are looking for longevity? I’m not very well versed in Baja, so I’m asking and not being accusatory here. Maybe I’m missing something and need clarification, but I’m not entirely sure a baja engine can be compared to factory engines. I would think that companies with billions of dollars looking to extend fuel performance would maybe adopt K&N like filters because they not only produce higher horsepower, but increase fuel mileage and help with filtration that also filters better? I need something more than a story and more actual science analysis.

Dale here. I am glad that you have mentioned that the engine does not need back pressure. I have talked with many people about this, and they always say that there needs to be some type of back pressure. As I mentioned in another video that you did "Grumpy Jenkins" once made a comment about using slightly larger exhaust manifolds (in this case headers) so he could block backpressure and therefore gain a few more horsepower and a slightly quicker time on the track. With what you are talking about here validates his comments and makes me want to agree with you about the person who demands that the engine needs that backpressure is either ignorant or parroting words that someone told them were gospel. Thank you for the information that shows the fallacy of that view.

Thank you for sharing your knowledge. I hope some youngsters can learn from you. 😊

That's dam fine! where do I find the info on how I can try to do this on my heads? of better yet can I send my heads off and have them done? There's plenty of guys out that will port heads for me but I don't want to get ripped off by joe blows head job. I'm sure I could butcher them myself LOL!