THE OVAL OFFICE-WHO WINS?

[@bimmerman9839]

100k subs coming soon! I've never seen anyone do such thorough testing like this, definitely learning a lot thank-you!

[@AnDrEw122100]

Richard Holdner just dropping knowledge . Love this channel.

[@johnparrish9215]

Hey, the Speedmasters did better than I thought they would, God knows they're cheap. Now the AFR 265 heads I had never even considered, don't know why, those are some real tire shredders. Thankyou Mr. Holdener.

[@FreakOlds]

Good one 👍🏻 I’m running a set of the Brodix RaceRite Ovals. They’re awesome on my 468. I’ve run 11.8’s at almost 4000 pounds with tall tires 3.73’s on pump gas. That’s with a dual plane intake too. I especially enjoyed this video!

[@kwik440]

Holy cow Richard, I work up a sweat just watching your videos, I can't even imagine how hard you work, I have an engine shop,and dyno, So I know first hand how much work it is to put an engine up on the dyno..>> When I first started my shop a thousand years ago, I "fantasized " about doing just testing ,and experimenting like you're doing, good luck, turns out ,there are stupid bills to pay, so rarely do I get the chance to do experiments like you do. 1000% respect for your hard work.

[@richardholdener1727]

thnx

[@lukemorgan3368]

The dislikes on this video must have got their feelings hurt by old school big block power at the stop light 😂. Great video!

[@kwik440]

Maybe life, just isn't for them.. they live in their mom's basement, and eat Cheetos all day

[@excelerater]

nah ,we run big ports,lots of spray and like to wind engines up to make real power..

[@dragginwagon406]

My guess is that there was Biden-2020 ad shown before the video,; they thought they were downvoting the ad and not the BBC video.

[@MississippiDan1]

He's got all these ford lovers following him... They just can't follow a big block chevy close enough to reach the like button... 😎

[@theeoddments960]

There’s literally 20 dislikes tats less than pure chance

[@Artoconnell]

Mr. Holdener you are the hardest working guy in this business. Thank you.

[@Knightmare-gz9ls]

Love the big block stuff 🤘🏻

[@HilBilySasquatch]

I have a 402 with 049 heads and running this same cam.. still in the process for putting it in my truck. Should be alot of fun. Thanks for the tests.. and the awesome work you do.. 👍

[@UnityMotorSportsGarage]

Dude... The amount of testing you have done never ceases to amaze me!!! Great Job once again! Keep them coming... And I'm ready for a Shirt...just saying!

[@deanstevenson6527]

Unity MotorSports Garage : Sensational Journal of activity Andy. Richard H, thanks for sharing. Its great fun and good to be alive watching this. As a kid, I had to wait 4 weeks for a certain article from Popular Hot Rodding. Its like Im 10 years old reading about how much horsepower and gas a Z28 makes at 55 mph on a dyno with differnt combinations. The new media is the Westech & Holdener "NeeeeewzFlaaaasssssh!!!!!".

[@tunerdadtunerdad7927]

Nice test. Thank You. I don't even look around anymore. I just purchase the Edelbrock RPM kit for my Big Blocks and put them together. They run phenomenal.

[@lindsaymcpherson4744]

Great to see a conservative street style camshaft , I had a 9.7-1 oval port factory cast iron ,640int/641ex/ 3500lb holden with driver. 10.80@128mph

[@brentonk461]

should have done 049 or 781 stock unported with stock 2.06in 1.76" exh with 3angle valve seat. I think you will find those would have achieved above 500

[@danh.122]

I agree. Maybe even show 049/781 with 2.06/1.76 and 2.19/1.88 valves and some basic bowl blending. Something the average person could do.

[@davidharrison8397]

That would have been a better head to head comparison.

[@oldschoolbudgetracing1458]

I have been a major advocate of oval port heads on a big block for years. Love proving people wrong with the oval ports... lol

[@RyanSteele92]

Love AFR

[@craigchiddo2794]

I would love to see a set of those afr 265 ovals on a 427 I saw the article the next cam lower in that series works better with the afr heads

[@peaceandrelaxationwithgodscrea]

Richard you have the best job in the world. Thanks for sharing with us

[@rapidride2]

Richard. Your channel is CHANGING the game. All other channels are in your dust when it comes to videos packed with information.

[@fntony4967]

Alright Rich!! I am ready for the BB Rect port test!! In the way back, 1995, My 496 had Cast Iron Merlin Rect Ports, 850cfm on a Vic 454-R and Comp Cams 288AR-8 Solid Roller, with flat tops it had 9.8 CR 605hp 610tq. Peak Power at 6400rpm. I always wanted to improve on that but never had a chance.

[@escuelaviejafarms]

I can't wait to see the rectangular port video, I'm going with a set of Brodix Dragonslayer 320's on the 433.

[@revdevil9419]

That's allot of port for a 433. Hope you rev it to 7k plus

[@Trebor-gw8lt]

AFRs were no surprise. Best out of the box heads that you can buy.

[@GIGABACHI]

Richard, you're The Patron Saint of "The Other Guys" !

[@JackLawson-WingSmallForward]

Great job and fantastic information Richard!! Thanks you for these tests. Dr J's did a great job porting as they created more HP than some aftermarket heads. Well done!

[@Wormser_mcfrazzleweiner]

When you do the 496 throw a tunnel ram on the best testing heads! The world needs more tunnel rams!

[@rustymedendorp4875]

Yes Sir!

[@steveblottenberger1097]

Keep up the good work Steve from Annapolis Maryland you're like my double

[@sevenoahuhi2279]

Awesome videos, love the BBC stuff building a 496 .

[@jessicawatson-english5505]

And thanks so much for all of your hard work Richard we love everything you do love you 😘

[@MississippiDan1]

Awesome test!! Building one now and was trying to pick a head... ❤🙏😁

[@stripes13311]

Great video with lots of information I have been looking for. Thank you Richard

[@bluecollarhotrods9781]

Awesome test as usual. I have a .040" over Gen V 454 with AFR 265s going in my fathers 72 ElCo. Was hoping to be around 600, but running a much smaller cam - ZZ502 H.O. camshaft. Topped with an Edelbrock Torquer and a Holley Sniper EFI. Maybe 560-575 is a more realistic # for what I have.

[@bigkellyg5947]

570-575 hp is around 600 in my book.

[@georgepanayotopoulos4985]

The Edelbrock torker could be swapped out for an rpm air gap, will make a big difference across the entire rpm range

[@MyLonewolf25]

Get yourself a rpm air gap and that would definitely help

[@hankclingingsmith8707]

WHAT MOST PEOPLE HAVE TO LEARN IS PORT VELOCITY. ENERGY IS WHAT GETS THE JOB DONE ON MOTORS BELOW 7000 RPM

[@AJsSpeedShop]

Goes to show you, flow numbers don’t always mean shit... AFR 265 with the smallest ports, smaller valve etc dominated the group. Most power, best curves, held on the longest up top. Killer stuff Richard. I can’t wait for the rect port test.

[@Mccleje11]

Great info thanks👍🏾👍🏾

[@nathanmcbride1462]

I was surprised that the peanuts made it over 500. That’s my goal with a little smaller cam but more compression. Trying to keep the rpm down on factory crank and rods

[@stanherman5604]

every time i hit 6000 rpm's on my 396..it was time for a new bottom end job.

[@Christian-lf6iy]

@@stanherman5604 what do you mean? how many times did it blow at 6000?

[@stanherman5604]

@@Christian-lf6iy Twice

[@robertwetherington3372]

Loved that test. In the early 80s I traded my rectangular port heads for a set of race ported oval ports because of the low end power they provided on the street. I think this was about the time when articles has just started coming out about the difference at that time. The ovals wer far superior on my 468 in a 3600lb car

[@jacobsheppard862]

512hp from stock peanut ports? Well that settles it for me, all that money I was going to spend on heads is going into a roller cam and blow through carb!!

[@delljr2769]

Why be stuck at 500 with stock heads after a nice upgrade of roller cam and intake, where as AFR or Dart heads would help you get much closer to 600 horse with at least 525 torque.

[@BruceLee-xn3nn]

@@delljr2769 pick up peanut ports for 100 bucks. You got it admit thats cheap power

[@revdevil9419]

Really appreciate this video. Hope you put the 265cc afr heads on the 496ci!!! Cant wait for the next video. (I'm putting the cnc 265 afrs on my 496)

[@unclesquirrel6951]

Awesome video Richard ., I'm looking forward too part two 🐿

[@vwdarrin]

I built a big block for a buddy of mine he has a machine shop it was a 454 block we used a 396 crank and the 60 over bore 12 to 1 compression the cubic inch comes out to 431 inches we use the det of O 49 cylinder heads We spray welded the exhaust ports to pick up the exhaust speed and ported the intake ports this motor made it easy 600 hp just recently upgraded To a good set of rods and the motor look great Felt guilty spraying it with nitrous so we upgraded to bottom and it pushes a full body nova into the low 9 s would love to see You build a small big block and put some bad ass heads on it

[@xmo552]

The det of 049 heads. Det??

[@glennshotrodgarage5509]

im building a 461 right now with the factory oval port heads im using a comp cams Magnum 294S Mechanical Flat Tappet Camshaft Lift: .595''/.595" Duration: 294°/294° Lobe Separation Angle: 110° RPM Range: 2500-6500 10.5 -1 calculated compression ratio duration at .050 is 248 which seems like a somewhat compareable camshaft to the one you used it seemed all the heads except maybe the afrs would have done better with an edelbrock performer rpm intake im at a bit of odds right now between single and dual plane intake however it seems to have ample torque to get the car moving with the single plane and a plate might be in the cards .......Love your stuff thanks for all you do !

[@mikef-gi2dg]

I got a couple of 402 bbc, and 2 pair of peanut ports head, if they support 500+ on a 454 than my 402 or stroked to a 434 should be no problem. One of these in my 78 Malibu, and my 68 Impala should be a lot of fun. Good JOB!!!!

[@gmcnelly2468]

Richard, it is past time for BBC stuff. Great work!

[@richardholdener1727]

lots of BBC videos up

[@GermanShepherdsofOKC]

Thank you for sharing all of your results

[@cuzz63]

I noticed the AFR heads show better flow rates on the intake at lower lift and not higher flow than the other heads.

[@updragracer]

50 degree seats on afr makes great low lift flow numbers . and obvious power .

[@garageredzone]

Higher average flow makes more power! You'd need higher lift to make use of the higher peak flow heads shown anyway :)

[@cuzz63]

@@garageredzone normally do but these made more power with less flow, I guess the difference was smaller chambers.. I have noticed that if the more lift doesnt help flow you can size you cam according to that.

[@Dr_Xyzt]

During the time the valve is opening and closing, that's when the low-lift flow becomes a factor in mid-upper RPM performance. That's when the valves are in overlap. The amount of time in overlap, with the right manifold runner length, and header setup, will purge the cylinder and the combustion chamber. --You're supposed to be able to make 1.3 foot pounds of torque per cubic inch with a well planned built, no matter what design of engine you have(pushrod, 2-valve, 5 valve dohc, it doesn't matter). If you know what you're doing, you can get it. Otherwise, you're gonna be closer to 1.15.

[@francfurian8215]

Good comparison Richard. I’m looking forward to the second instalment. Cheers😊

[@johnhazel9986]

Thanks Holdner!

[@jesusisreal3209]

What is over looked is with the high quality small runner aluminum heads, they get better mileage and the rings last longer because the air fuel mixture isn't crashing into the cylinder wall like stock iron BBC heads typical do

[@Dr_Xyzt]

Those AFR 265's are a great cylinder head. That's a good overall setup. I'm looking at the bubble from 4300 to 5200. 560 foot pounds. At 1.3 foot pounds per cubic inch, we should be able to get 608 foot pounds out of that top-end assembly. That's around 750 CFM at 5500 RPM. If the carb is rated at 28" water, that's 1psi pressure differential over the carb. Which is 13.7/14.7 density loss. That is 93%, or, 566 foot pounds out of a total of 608 available. Right in-line with where everything is. --So, if the bubble represents the cam, head, header, and intake being able to scavenge the chamber on a 468, A 496 would need (496/468) times as much compression, which gives us. 10.6:1. And to get that extra air density, an adapter that tapers at 7-degrees from a 4150 flange, to a 4500 flange might be the ticket to get us there. The additional air density might make that bubble bigger. -What about the GM manifold that came on the RamJet502? I wonder what it can do if you hog out the front of it to fit an oval throttle body for a 5.0 coyote.

[@TheBukesde]

Straight up awesome!

[@drakeolson2539]

Good info brother!!! Thank you!!

[@jaredfarney675]

I bet the AFR heads had the best port velocity. Nice video! The speedmasters were a surprise. Keep it up!

[@DevastationMtrsports]

This is a really great video I have a set of fully worked 049 on a 468 but it is 12.7 compression but I've run 10-6 at 127 so far and it could definitely use more converter NA in my 1970 Chevelle. Videos are on my channel.. nitrous passes are 150 HP setting and easy mid nines.

[@richardholdener1727]

Thanks for the info!

[@bowtiebubba69]

I would like to see an overlay of all the different graphs. To compare the heads to others. Not just the peanut heads.

[@arturos.3973]

I'm learning so much from your videos. Thank you

[@mp5778]

Another great test and results. When you do the rectangular port heads, PLEASE try using and compare a oval port intake manifold vs rectangular port intake manifold on the rectangular port heads. I know a port mismatch, but there might be some surprising results.

[@bdugle1]

Thanks for doing yet another tremendous job with massive info for us viewers! BBCs seem to like lots of overlap and duration, but this cam seemed on the small side. How about another 0.100” lift? Most of the heads showed good flow up through 0.600 to 0.700, and a 2.25 intake valve would generally suggest at least 0.650 lift. I’m thinking these heads could do just fine on that 496, too. Thanks again for all the super videos!

[@jimkillen1065]

Many years ago i was told about guys running the oval port worked heads on bracket motors. At that time i waa doing the wrenching on a 68 camaro 427 powerglide combo . Ran ok .

[@keysautorepair6038]

Can't wait for the 496 head test.

[@w41duvernay]

I wish Richard would use a 427 Chevy bbc to do this test.

[@russelljackson7034]

Right on

[@Kmecha84]

You forgot a large oval port head 781's. It would have been sweet to compare those two

[@shitbox7413]

I’d like to see the exact same testing with a 496...

[@ianhamiltonstore9373]

Sesame. I'm at a point in my 496 build where Im ready to throw it out the window. I need to spend my money wisely for the rest of the build and heads are the biggest cost

[@davidcallahan5157]

Shit Box cost is the same as building a 468 so might as well have the extra cubes!

[@rustysausage69]

Add 10% to every point in all the curves and subtract a couple hundred RPM, there you go.

[@shitbox7413]

David Callahan, Absolutely, I’ve seen 496’s with 781 and 049 heads, made huge low speed torque. If iron GM heads will work to some extent with that much displacement, Im sure any of the the aftermarket castings Richard tested in this video would make for one nasty pump gas 496. 👍🏻

[@shitbox7413]

Ian Hamilton Store, Build what you can afford, can always upgrade later, good luck man. 👍🏻

[@Go4BrokeOffroad]

I bet those small ports would fill up with boost pretty quick!

[@bartpang]

You probably need to watch more of Richard's videos.

[@big_steve_o5129]

Tony Mamo in the thumbnail? It's been a LOOOONG time since he was at AFR.

[@GJ-DT]

Can you please dyno a 454 with afr 265 vs. afr 305. Thankx💪

[@calvinevans8305]

Now I want a big block 496 with afr heads.

[@xlr8r3VA]

Would have loved to see the Dart Iron Eagle oval port heads and the Chevy Performance oval port heads added. I have compared the flow ratings on the Dart heads and some of their Iron Eagle heads out flow some of their aluminum heads. More power, lower price!

[@richardholdener1727]

Great suggestion!

[@unclesquirrel6951]

Just for the record because this is a bbc video I'm not wearing pants .

[@attitudeadjusted9027]

Should I wear a mask when I poop? Or just when you poop?

[@deanstevenson6527]

John Woodworth : As long as no Squirells haven't escaped, the Rat is safe.

[@unclesquirrel6951]

attitude adjuster wearing a mask when a person ( or squirrel) poops is a great idea to keep the poop smell out unless the breath is as bad as poop it self then at that point the mask don't help :( , a few times when I woke up I had to figure out what was stinking .did I just fart or is it my breath :/ . Then I just simply blame squirrels and all is forgiven

[@deanstevenson6527]

John Woodworth : Thanks John..You can do no wrong. Your words are right especially in a wood where every other guy would be a mouse and not a man. On the Elimination aspect verses Halitosis.....The poop is gone and even the Penaut Ported Rat powers on. How is this even possiable? YEP...IT.WAS SQUIRELLS.

[@xmo552]

John, sir in this case bbc is big block Chevy not big black... Either way... enjoy 😁

[@DNOFHD666]

Hi Richard I really like your videos about 454 i am building 454 gen vi with afr 265cc same as that engine : 1- what piston do u use( SRP)in that gen6 bore strok or part number whats the Compression ratio that you get . 2-do you change the carnk or its stock also do you change the piston Connecting Rods or stock . 3-Head gasket that you use part nauber & thickness. 4- is it ok to use this part SRP Big Block Chevy Small Dome Profile Pistons 212159 & bore the the engine block to 4.350 or more to fit this piston . thanks for the lot of exprince that you give to us from you real great videos ✌

[@richardholdener1727]

Unfortunately I don't have part numbers

[@bradlywages]

I was hoping you had a set of 702 heads. If anyone knows where they might stand in this list please let me know. I have a set just sitting in the garage. Thank you and great value in this video.

[@jimmymartin3714]

The AFR head used, was it the 3610-1 or 3620-1. One has larger exhaust ports.

[@robertwetherington3372]

I would of liked to seen a set of stock rectangular port heads on the same motor

[@josephhickle9822]

How about putting a sniper efi set up on top of a set of the aluminum heads to test the sniper. If it would support that set up would be an awesome street engine.

[@libertyjusticeforall6754]

I remember this in a magazine. It was awesome. Where you there when they did this test?

[@richardholdener1727]

I did the test for the magazine

[@gainerman]

Seems like the peanut port heads I have come across, had less cc chamber than those 360s in this test .

[@edcompani4308]

Love your videos, what Rocker Arm ratio are you running ?

[@williamnorman8935]

Awesome video full of good info, but I'd also like to see the rect. port on this smaller motor as well. I know that there is no replacement for displacement, but for all the guys out there with the little motors might want to see if there are any benefits to a rect port head

[@badbehavior1883]

Most Informative BBC video for most common heads on the internet. Can you reveal the exact piston you used for this demo??

[@Hamza-or7jm]

Still waiting on that lsx roots supercharger fed by a turbo

[@angelmarcano6747]

I had an article that these West Tech guys did was it really good article unfortunately I lost it. What I remember about the article was that they took off 454 block bored 60 over and cut the stroke down they shorten the stroke don't know the stroke of the crank, and came out to be a 509 cubic inch motor I don't remember if they did an extensive head test. But I remember have ridiculous torque curve and power curve it just kept Rising, also I have very good bottom-end torque which was surprising thing. It will be nice if you could do that

[@kroeker66]

In all the test on BBC you have mentioned windage and oiling systems. Do you have any videos that go into more detail of what is needed for a BBC

[@angelovasilikos7980]

Great info thank you Richard. These videos are awesome. Keep them coming. The Speedmaster heads would be great for a budget build with Summit brand parts as well. Is a Same test on a 502 coming? :)

[@marcstlaurent3719]

Excellent job , I always look forward to your content Richard , I asked earlier not sure if you answered , what happened to Bryce , he ported a victor junior intake for me ten years ago and did a fantastic job but then seemed to burnout.

[@jeremymurphy7320]

A big block Chevy test...Brulé had to be drooling allover himself.

[@lukestrasser]

I currently have a 10.5:1 468 with the 2.25 intake valve GM aluminum "roval" head. I really want to build a 496 with an AFR 300 Magnum Oval for a street 68 Chevelle.

[@revdevil9419]

From what I've heard the 300cc go turbulent better to stick with the 290cc.

[@michaelparadisis4076]

I have a 572 with 300 AFR’s, super Vic intake , 11.8:1 Comp , 270/274@.050 .728 lift on a 112 LSA., Torque 736 FT/Lbs and 807 HP on pump gas.

[@lukestrasser]

@@michaelparadisis4076 what RPM for HP and Torque peaks? That's a lot of displacement on that head, I bet it's a blast torque wise.

[@MsMichael200]

I was running the compression on your engine with the -22 CC domes you had paired along with the 049s that have 119CC chambers and came up with a number closer to 9.55:1. You said something closer to 10:1. is your deck height different then .04? Once you moved over the Edelbrock heads with 100CC chambers wouldn't you be able to provide more cam because of the increased compression ultimately adding more horsepower? I'm just learning this stuff so sorry for the stupid question.

[@richardholdener1727]

why would you change the cam with a change in compression? also what gasket thickness and ID and deck height did you use for compression calculation?

[@w41duvernay]

Just wish you had tested afr 300cc oval port magnum heads against these.

[@sseibonnevilleman]

Do you think the Edelbrock would have made similar power to the AFR if it didn’t have the valve spring issues?

[@patricksaylor6210]

What about some gen 6 oval port heads

[@erenzoscroggins8056]

Learning a lot... But I do know that cam is way to little for a Big Block Chevy especially if you put 600+ lifts in LS engines which are smaller... That's just from paying attention to the channel💪🏾💪🏾💪🏾.. but great info

[@richardholdener1727]

lift does not determine if the cam is big-duration is much more important

[@erenzoscroggins8056]

@@richardholdener1727 right on💪🏾💪🏾💪🏾

[@erenzoscroggins8056]

BBC vs LSX build up same everything???🤷🏾‍♂️🤷🏾‍♂️🤷🏾‍♂️#onedaysoon

[@danielsullivan9865]

@@richardholdener1727 Brian Tooley says 3 times the intake valve diameter for maximum lift does that hold true here

[@mikewheeler1924]

just wanted to know why u didnt use the speedmaster 305 cc intake runner oval port heads, also i think the reason why the afr 265 oval port heads made more power is becuz the comb. chambers were so much smaller, more compression probably at least 2 or three points higher, i guess the motor liked that alot

[@richardholdener1727]

2 or 3 points higher? um.....no! The little head offered more of everything that counted-just not port volume

[@larrykroger3100]

Do the rec. port heads on the 468 motor,so there is some direct comparison..I would like to see how much power is lost down low...

[@Anarchy-Is-Liberty]

What about the 781's? What about the 820's?

[@plasticzeus40]

Hey Richard, do you have any experience with the KMJ BBC heads? I heard allegedly the flo-tek are AFR copies?

[@richardholdener1727]

i have not

[@bbier330]

I noticed that you did not keep the compression ratio constant over the test. Seems like the chamber volume varied from 121 cc down to 111 cc. Doesn't that alone invalidate the test.

[@richardholdener1727]

invalidate? we tested the heads they way they are supplied.

[@iomero3849]

Hey @richard holdener this pistons is for 6.386 rods this not a 468 is a 496

[@tomkozlow4768]

Hey Richard, great video. What I am really curious about especially with the afr 265s is if you added another atmosphere of boost, would it actually double the horsepower to 1200+ or would they not support that kind of cylinder filling? I assume the reason they made that much power is because they filled the cylinder so well with a high port air speed. Curious on your thoughts. Also, when are we going to see the BBC Big Bang video???

[@ekitching]

I wish you would have thrown in a set of Edelbrock "rovals" 290 cc in there...

[@richardholdener1727]

please see the oval-port BBC head test video

[@excelerater]

the question is,does anyone build 468s anymore? With blocks harder and harder to find you end up with an aftermarket Dart or similar and 540 begins the journey for the BB in the 21st century weather it be a Hotrodder or street strip engine and even if you do have a clean GM block with parts coming in as kits these days 496 seems to be the bare min .

[@justavillain]

How about the less oil in the pan more power myth? That there is a point where you can make max hp and oil pressure with less vs more oil in the pan causing more drag and lower psi ( so I've heard)

[@richardholdener1727]

we do play with oil level on the dyno