David Vizard's PowerTec 10 EP 31 SBF factory iron heads - 100 hp mods!

In this , episode 31, DV shows the flow bench & subsequent dyno results of a set of factory E7TE iron heads ported as per his porting school instructions. On a short street cam equipped 302 dyno mule the gains shown were up over 80 hp with close to 100 possible on a 351.

[@robertreavley7145]

I’d say the negative comments and hiding behind fake names. Is purely down to frustrated jealousy. The work you and your team do is if absolutely sound quality. And without mistake. Derived from decades of critical thinking, the use of mathematics, physics, and a mindset that is its own best critic! You can tell by the videoed I’ve watched of you David, that you and your team are no fools and have a unified ideological mindset. There’s not anyone out there that has your level of ethos. God speed!

[@luckyPiston]

I love how 302 cubes are making well past 350 horse and with not even that big a cam ! Having proper flow is like having more duration without hurting bottom end power ! They are not just making more power they are making more usable power everywhere.

[@morganmclean1790]

this is a 351 based motor

[@luckyPiston]

@@morganmclean1790 If it was a 351 wouldn't you see torque numbers going past or even well past 400 Ft.Lbs. range ???

[@morganmclean1790]

@@luckyPiston thought he said 351

[@luckyPiston]

@@morganmclean1790 @ 15:14 David talks about 351 in way that could throw someone off a bit.

[@servediocylinderheads]

@@morganmclean1790 306

[@carportshenanigans5918]

Being proven wrong is a great opportunity to learn and grow. Some people just have an overwhelming need to be right, I suppose.

[@juhanahuovinen]

Can I ask do you have IOP and how you measure over time where you were wrong?

[@ziggassedup]

I'm an old mechanic that's "played" with engines many times but never with heads myself so I'm learning here thank you Dave.

[@michaelgiglio1571]

Dick Johnson allways said, its all in the heads

[@christophersmith2107]

This man is THE MAN. Bottom line, his stuff flat out works

[@cwfella]

Another great dose of useful information! Well done!

[@echadmiyodea]

i needed this 24 years ago.

[@ElvinLeadfoot]

Awesome:) Thanks King David

[@mikew6135]

I'm enjoying these videos

[@ronaldroberts9556]

As ever, never any BS. Have admired your work for 40+ yrs!

[@mikerequa6006]

Very grateful that you share your many years of information and in such detail. Some of us love the nerdy deep dives.

[@alessandroghizzo972]

Greats tech contents. Facts not opinions. Thanks Mr Vizard

[@berneicemussmann2036]

I’ve been uninformed on different things on an engine . When I was much younger but now I feel more informed by you david, but now I feel way more informed about your episodes, thanks a bunch . Bruce mussmann

[@dennisrobinson8008]

His book how to build horsepower volume 1 instill all these concepts and is an easy read.

[@jguti329]

The hardest part of watching these videos is having to wait for the next one to come out! Awesome stuff. Thank you very much.

[@mikedeal8659]

Thanks David. Can’t wait to see what you have for us next. More than once I’ve seen E7 heads used as an example of poor head design but DV always looks at things differently. Have a good day.

[@donp5447]

With the price of aftermarket heads, rockers, pushrods, guide plates, etc... this is looking better all the time.

[@stephenmonkhouse6114]

Great Video. Can't wait to see the porting video. WAY TO CALL OUT THE TROLLS!!! Love that you do that. Thanks

[@kevinflowers3130]

Your explanation of vacuum advance brought me to your channel. Very informative content. Looking forward to learning more!!

[@performancenaveia7821]

*thanks for sharing all those years of experience,don't worry about the comments from keyboard engine builders who never prepared an engine watch 2 video on youtube and think you know everything,a meter of practice is worth more than a kilometer of theory*

[@craighansen7594]

I will watch and enjoy more E7TE ford head porting videos. Those heads are so plentiful and inexpensive. The series you did on the early ford 289 heads I really started to get into but cannot seem to find the episodes beyond the first couple. I have a pair of my very mildly ported 1965 289 ford heads that I ported long ago, I want to apply your technique to them. I have more than a few v8 projects that I plan to use the factory heads and intend to port them all.

[@arturos.3973]

Absolutely amazing. From stock E7 heads. Wooow!!

[@servediocylinderheads]

Not exactly stock!

[@servediocylinderheads]

This may hurt some feelings so read with caution: Cam specs, seat duration 260, duration at .050" 204, lift .472", l/c 110. Flat tappet hydraulic cam from Mike Jones. Cam # H65295.

[@patrickduncan9656]

G'day Charles would you change the ports and /or run a bigger cam for a 347 ci motor?

[@servediocylinderheads]

@@patrickduncan9656 Bigger ports on these heads are problematic due to casting thickness. As they are they would be torque monsters on 347.

[@patrickduncan9656]

@@servediocylinderheads Would be interesting to see how much hp and tq these heads would support with a bit bigger hydraulic roller cam and rpm or cubes

[@stuartwall8212]

This points to better ports dont need as much cam to fill the cylinder....but what size valves are in all three heads? I assume stock is stock, but the others?

[@servediocylinderheads]

@@stuartwall8212 1.97" 1.6" I will state that I feel the intake valve is a bit big for these heads. The ssr is too close to water to really feed the bowl. 1.85" is probably just as good with some air speed management.

[@user-le5no6fl2l]

Power tech 10 is fascinating, No one has helped me more with my endeavors of flow mods.

[@malcolmshaw2609]

Really looking forwards to this series of videos, have a 5.0 that’s crying out for mods like those described

[@approachingtarget.4503]

If only the manufacturers paid this much detail to thier designs.

[@hotrodray6802]

$$$$$

[@gothicpagan.666]

@@hotrodray6802 And finding people to do the work. CNC is fairly common now but when these heads were cast people were just learning to walk up right😆

[@magnusdanielsson2749]

Well the new LS engines are quite amazing. Or GM Atlas engines, High Feature V6 etc. So its not like theyre not doing it.. Also look at Honda, VW, BMW, Mercedes or even Kia engines just to name a few..

[@dionpiazza4672]

Great video! I like how you added the dyno footage. Thank you for keeping everyone honest.

[@finnroen2334]

Pure gold. Thank you.

[@flinch622]

Well put. Low lift flow means the shorter time window that high rpm has benefits from the early efficiecy - cylinder filling gets a good head start. Top notch as always.

[@johnbaker3549]

Can't wait for the next follow up date! Would like to see an explanation about shimming stock hydraulic roller lifters for reduced travel and setting the lash correctly. Thanks for sharing.

[@hotrodray6802]

I would like to know more about the "off the seat" rocker ratios 👍👍 Im going 1.7 but not sure what to buy.

[@MrAvenger1600]

This is brilliant. I find it a very interesting subject. I have a signed copy (By you David Vizard) of how to port and flow test cylinder heads. I am in the process of building a DIY flow bench using a vacuum motor from a large wood pellet filling system. I will be doing tests on a few BV heads from the Hillman Avenger 1.6 here in Ireland. All the testing will be done as per instructions from your book. Looking forward to lots more of your excellent videos! Regards Edward Gibbons

[@davidresar8256]

I remember back in the day when aluminum heads were the ticket, it looks like the E7 modified heads are better than the cast aluminum heads! Great job!

[@hotrodray6802]

$4,000 porting by Vizard 👍👍👍

[@347mav3]

The e7 head sucks but it obviously is a decent platform for performance with the right work.

[@davidresar8256]

Can't argue with the results!

[@richardmoerke9329]

I just want you to show more dodge. Love your show! Also I have never done this stuff so to get any help at how to do this is better than i would have been doing by myself. D V !! Don’t let the pro’s get to you! Arm chair pro’s know everything. LOL! !! Keep up the good work on helping the rest of us.

[@bradoconnor9868]

Thanks heaps for the great show! I look forward to seeing you're porting videos and learning more about what effect well executed head work has on cam shaft behavior and the overall effect on the engines power delivery. I don't have a SBF, but I am shore their is plenty of relevant information for seeking out some street proformane from my Australian 04 Ford XR8's 5.4. I really don't want to rely on big cam lift to make more power. It's my daily driver.

[@brandoncarpenter4077]

DV is the Man!

[@79beans347]

I just subscribed and I will like it, this is some very good information from the porting guru. One could make a good living with half of what this guy knows

[@circut3722]

Nice job on the video , keep up the awesome work . I love that you are willing to share your life's work . Thank you very much !

[@gloriafletcher9318]

Im building my 1st sbf. Thanks for all the info.

[@patrykszewczyk9789]

Mr Vizard, You've got my votes. Great video, great performance, great Man !

[@markerwin7416]

This is huge. I've been searching for this level of detail on E7 porting for years. If what David says is true, and I'm sure it is, the info he will be showing us is priceless. Can't wait to see more. Thank you Sir!!!

[@mikecondoluci53]

THANKS FOR ANOTHER GREAT VIDEO DAVID, CANT WAIT FOR THE NEXT ONE

[@stuartwall8212]

I built the floating pressure drop bench, I got a foredom cable driven tool, $30 buck 69 302 heads, many hours of Davids power tec 10 tutorials, and my first experimental port job flows 125 CFM at .20 lift as tested on a superflow 600. It was FUN! Am I ready to use them? NO! I gotta watch the whole E7TE thing before I call it good.

[@dannoyes4493]

Thank you for this.

[@johnsalvaterra1355]

Thank you DV! I currently have a 302 with GT40 heads, and a Kennebell supercharger. The heads pretty much stock, with a Crane 2030 cam. Interested in some improvements to these as well as E7's. Will be watching, ( of course I've watched all your videos) very good information.

[@reinaldomedina3338]

Very good information, R Medina

[@anthonyrone393]

I wanna see the cylinder heads... I'm from Missouri, You gotta SHOW-ME... LOL! ✌😎❤

[@ronnieb7408]

Now if I could only figure out how to get the cast iron heads to weigh what the aluminum ones do..lol. Very good information and has opened my eyes to what can be done to factory parts to build the ultimate sleeper especially if on a stroker and possibly turbo combination

[@kennethperian4370]

Thanks for showing telling, I am learning more than I ever new about. Thanks again see you next time see ya bye bye.

[@markweber7275]

Thank you David and team, well thought out work. Trying to do as you direct looking forward for updates!

[@juanf4739]

Wealth of informs, your a genius. Thank you.

[@egorkudinov8771]

Дэвид спасибо большое за исследования и за то что вы делитесь этой информацией! Жду всегда ваши выпуски и включаю переводчик на youtube :)

[@GapSauceYoutube]

Translation came across perfect mate 🙂

[@servediocylinderheads]

About 7:00 John had a bigger exhaust port. I also noticed that John's heads had a much more big block sound at idle. My smaller ports mellowed the exhaust note.

[@tedgay8427]

Can't wait to see the porting procedures. Which episode outlined the short block? What are the cam specs? Last, which intake manifold are you testing with? Cheers!

[@luckyPiston]

Cam specs i think are here .. 11:21

[@panthermadness4232]

Jones Hydraulic Flat tappet # H65295 260 duration (204@.050") .472 valve lift. It's my belief Mr.Vizard went with such a mild cam to more showcase the difference in power for more the cylinder heads than using a more aggressive cam..What was impressive however with the mild cam is he shows the difference in power as well using a properly spec'd cam over stock and most all the aftermarket replacement cams..45ftlbs and 40hp from such a mild cam is no joke...combined with the heads that's a serious improvement for such a smooth idling street engine..Sleeper status at its finest. I'm building a very similar engine also using the same Vizard/Servedio ported heads with a few steps up in the cam from Jones cams. 272 (216@.050).519" lift using 1.7 rockers.

[@waltari51]

A pleasure to watch your videos how to design combustion chamber intake and exhaust ducts, and explanations why

[@michaelblacktree]

I'm not a Ford guy, but I still find this stuff interesting.

[@ts302]

GREAT video Mr. Vizard!!!!!!!! Looking forward to the porting videos. Thank you Tony

[@shatteredskull1]

Great video!!! I like it how you always relate the power gains/power delivery back to how the car will actually perform on the track, not just peak flow or peak dyno numbers!!

[@jamest.5001]

If I could I'd sub again! Soo glad you are here!

[@timmaynard1825]

Thank you very much David, and your team of hard workers assisting you. I have a few stock SBF that I will be wanting to tickle up as time and funds permit, these videos are a fantastic source of information! I can't wait to put your teaching to work, I hope I am able to follow along!

[@johningalsbe3969]

Very impressed. Keep up the good work! Thank you!

[@tjakr3869]

Mr. Dyno's opinion. Love it

[@donaldmackenzie2686]

Thank you for sharing sir. IMO, it's always worth the time spent watching your videos. Am looking forward to the next and future videos. Cheers

[@johnkraft7461]

Very informative comparison - thank you. I'd love to see what David would have to say about Ford Australia's small port/small chamber 58cc 302 Cleveland head !

[@psychoholicslag4801]

This is a good example of what made the 5.0L so popular. The factory heads are so poor that they really show improvement easily. These are still way behind a mild Cleveland 2V head.

[@biastv1234]

Still the best content for tuning heads. Awesome stuff.

[@servediocylinderheads]

I love this video! I would still like to see what these E7's could do with a decent hydraulic roller say 228@50 and .544 lift like we ran in the early 90's.

[@juhanahuovinen]

Those heads with decent hydraulic roller vs modified ex. port and custom H65295 (bigger throats and retarted ex. lobe)?

[@hotrodray6802]

DV likes about 108* LSA on these. Aftermarket are usually veeeery wide.

[@deanharris7149]

Would love to see your take on a set of 4V Cleveland heads, and maybe 2V also. That has been the “magic” head in hot rod small block history.

[@riverratmarine7259]

Showing the proof says alot!

[@68nitrostang]

Excellent video and information

[@michaelstrafello7346]

I have a negative comment where we're you 30 years ago when I was using this kind of builds thanks my sponge of a brain is absorbing as much as I can

[@chestrockwell8328]

Couldn't click watch fast enough. :)

[@s4uk218]

Can't wait to see the in depth porting videos, kind of feel guilty for buying AFR220's now!

[@aaronshurrock4980]

Looking forward to the follow-up videos.

[@hendrikbezuidenhout9912]

Excellent love it

[@gearhead7841]

Just wanted to say thank you David, I've been a long time subscriber and really appreciate everything you are sharing with us!! I've decided to pull down the 5.0 marine engine in my Chris Craft boat to do a little work on the heads, which are GT40's, so I'm thinking some decent gains could be had with some porting and slightly more camshaft..

[@boharris8179]

I would love to see a series on the good ole world products sport2 sbc heads. Out of the box there ok but I've personally seen ported ones make some serious power. With all the used sets floating around out there for very low cost I think lots of us budget restricted folks could really benefit. Nvrmind I have a couple sets;-)

[@dielauwen]

The cost of the labor and parts is high. An aftermarket head is probably a better choice in value , hp, and time constraints.

[@Hjfvvdst]

Awesome 👌

[@robinliljegren2344]

I can’t wait to see how you do the valve job and talk about it. I will build a rally engine and valve seat is one of the only things that I can change from stock so I want that to be perfect

[@linziedorris5859]

Just great I really love the truths you share

[@pete540Z]

What's not to like? Great stuff as usual, David. I don't give my name, but then again, I'm not bashing either ;)

[@morganmclean1790]

great vids david appreciate you sharing your knowledge! 👍

[@thatguy83ful]

Great stuff. Thank you for sharing.

[@johndunn678]

Looking forward to the E7 video. I am currently building a 351w for a 1989 f150 4x4 .Have already purchased a set of 1.94/1.6 valves for it and am considering a Comp 35-238-3 cam for it. Waiting for instructions on how to improve the head.

[@cam3002]

Thank you for sharing, very interesting.

[@323gtx88]

This is part of my KZbin university

[@bobwhite5440]

another great vid.

[@chestrockwell8328]

Although I have aftermarket Aluminum heads for my 306 build, still enjoy learning from Mr. Vizard. Any chance you'll be touching on short block tips, tricks, and such? Thanks

[@outdoormayhem31]

Awesome porting info ... Port some mopar small block 302 cast swirl heads

[@dougroope8040]

I love your content David. I’m going to be reworking a set of E7TE heads for a 400” Windsor build because I have them already, therefore they’ll fit into my budget much better than forking out $2000 + for aluminum heads. What size valves are you using? Perhaps I missed it in the video but where can I get your book… I also would like to ask you if you have had much experience in porting the BBF (429-460) cylinder heads…? Thanks again for all of your hard work, and your willingness to help others like myself to become better engine builders…

[@dce428]

Thank you for the power tech episodes Very informative. I race. FE.s. In build my own engine s. I would love to see. FE heads. In your episode s. Just standard. Lowriser heads. Would be fine. To see where the heads can be modified. And what would the results be. Port velocity. Cross flow. Port bias needs to be. Thank you again for everything you do sir.

[@bobqzzi]

A very nice video.

[@davidbradford5432]

Love your videos, would like a list of your books, nothing like looking at it in a book.

[@wayneireland4802]

Good vid mr vizard thankyou.peace

[@jamiereaume359]

Hello Mr. Vizard! First I would like to say thank you for sharing your Data and Experience. Many of your content is in line with the teachings of my mentor. I would like to inquire, do you have any experience in ceramic coating piston and cylinder head chambers and if so, would you be so obliged to share?

[@servediocylinderheads]

For the Facebook Ford Windsor group...this is the video that has some guys upset.

[@jimurrata6785]

I'm a 385 guy but they need to get over themselves. Real talent and _real_ numbers don't lie.

[@user-id9ft8qv4x]

Thanks for video!

[@servediocylinderheads]

About 6:30 port bias is limited due to casting thickness.

[@jimurrata6785]

Thanks for these detailed comments and replies. You've done an awesome job!

[@PCMenten]

I’ll be looking for information on porting Cleveland heads.

[@threefiftyone4726]

I second this

[@theshed8802]

I'll third that!!! Small port, large port, closed chamber and open chamber, would be greatly appreciated

[@PCMenten]

@@theshed8802 Yes, I have three sets of heads, each diferent than the others; 2v OC, 2v CC, and 4v OC. But my understanding is that they flow the same up to 400 lift.

[@theshed8802]

@@PCMenten I suspect that the 2v OC and CC heads will actually be different due to the valve shrouding differences, despite the similarities in the ports. I haven't seen side by side flow bench comparisons though.

[@PCMenten]

@@theshed8802 Side-by-side flow is the same for all heads up to .400” of lift. Amazing heads.

[@68nitrostang]

Noted that David said on a bigger motor it will make more hp I’d like to see it on a 408 for a f-250 truck motor

[@Scarlet_1971_cuda]

I would love to see the same type information on the Mopar BB heads.

[@brucesherrill4116]

Small block and big block too!