DV's porting secrets for street and race tunnel ram's.

[@3800TURBO]

The Aussie 3800 v6 we use to race with has a factory tunnel ram style intake manifold. Makes excellent mid range torque. With so much valley room in that manifold I am surprised the designers didn't just move the runners apart a bit just in the plenum area.

[@immanutt4442]

Mr.Vizard , all kudos and accolades to you sir for another outstanding tutorial video !

[@bmaxTJ]

Thank you Sir.

[@joecurmaci5880]

I'm a Mopar man I enjoy your videos

[@Bbbbad724]

I love this! I love the Ford FE Tunnel Wedge and 8_-2 swap with the same treatment. The sound of happy air when you just twack the throttle, it is so tight, no blubbering or uneven noise or pulses!

[@shrodokahn470]

Firing order, well said.

[@BessieMorrison]

Easy to understand and simple visual presentation. 5 Stars.

[@mr.x1510]

Great intro

[@jessewayne8001]

I put a tunnel ram on my stock 67 440 RB engine that had 915 closed chambered heads and I used 2 - 750 cfm Carter AFB 3705 max wedge carburetors that were tuned to my cross ram and it ran and idled without any adjustment....I was amazed....but after running it for about an hour I pulled the plugs and found #8 rich and #5 lean....no big deal cause I wasn't keeping them on there I put a set of 600 Holly's on it they are much easier to stagger jet in My opinion plus I wasn't messing with Maxie carbs ....so my point being is that a cross ram n a tunnel ram are somewhat the same 1 is vertical and the other horizontal but they are miles apart when tuning one or the other

[@bobg3034]

Thanks for the info! Merry Christmas Dave.

[@theshed8802]

Hi David. So glad to see you talking about firing sequences. Being primarily a Ford Cleveland, and later 5.0 injected motor builder, I have always struggled with the Ford 1-3 firing order that hits the front part of the plenum 3 times in a row. In my opinion, there are a lot of Ford intake manifolds that work, but not many that are anywhere near optimal. Regards Greg

[@hotrodray6802]

Dual planes are better.

[@theshed8802]

@@hotrodray6802 dual planes do get around the problem. But getting them to work at 7k and above is a bit of a challenge

[@tp5337]

David, thank you for sharing your knowledge. Once again a great video. TP

[@hotrodray6802]

🔔😎 Excellent. Thank you DV, team. 👍👍😎

[@cam3002]

Thank you for sharing your wisdom. Assuming the principles will work the same on any engine. My application is a Windsor Ford and not aware of something similar to the 4 - 7 swap.

[@davidreed6070]

Doesn't the Windsor already have the 4,7, swap. The 4,7,swap is with how gm numbers it's cylinders. With Ford wouldn't it be a 2, 8 swap.

[@theshed8802]

Ford ran 2 different firing orders on Windsor's. The 1-5 order and the 1-3 order. Apparently Ford went to the 1-3 firing order to stop the front main web in the block breaking. All Cleveland's and high performance Windsor's ran the 1-3 firing order. Unfortunately it means that the front plenum gets hit 3 time consecutively by induction pulses.

[@davelewis2174]

Thanks I've had many duel quad and tunnel ram engines , sometimes having to stager jets to get even plug colors

[@calvinevans8305]

Awesome and interesting as usual David.

[@mrkultra1655]

Thanks David

[@johnsalvaterra3116]

Thanks!

[@dhudson4733]

passionate ìs the word you were looking for because passionate is what I see in àll your videos I just found your show and I I love it ivè kown somè very smart guys that I've learned so much from information that will be gone when they are and they are going fast and I just wish I could have learned more I just want to thank you my friend for sharing your years of nalage so thank you

[@NotSure723]

Great episode. I wish there some computational model that helps illustrate the robbing between runners.

[@lautburns4829]

Thanks David, I enjoyed that lesson!

[@robwelch9182]

Greetings from Cheltenham UK

[@DavidVizard]

And greeting to you Rob - how my old home town without me???

[@Scarlet_1971_cuda]

More excellent information!!!

[@broke_dongle]

On non H. O. Ford firing order , the 7 & 8 could benefit from this as well . Great Christmas present , Sir.

[@jarmominkkinen9409]

Can you tell me I have Weiand Tunnel Ram and sixpack.I like thise setup! Weery good respons on The trotel!! Have even PRO shot fogger in that intake!!! 440cui Engine.Challenger 70..

[@immanutt4442]

@slackthompson6984 ... true and the aftermarket intake manifold 'scene' was just taking off - so many (Offenhauser design and quality was stellar) Edelbrock , Weiand Holley and others had their designs as well - As an ol' Pro Street fellow myself nothing was and still is as impressive as seeing that big Tunnel Ram or Weezer sticking up out of the hood !!!

[@jarmominkkinen9409]

Grate Video👍👏👋

[@hotrodray6802]

I would like to see Jacque tribute and St Jude's $$ again.

[@bleeksbentbits3150]

1-2-7-8-4-5-6-3.... It's almost like the ol' Slide Rule Phil Irving had some kind of input into some aspects of the Holden V8 design that never got any credit...

[@echadmiyodea]

Why did Andy's tunnel ram make 20hp more than your modified tunnel ram?

[@brianalbrecht4423]

Thank u D.V. for another great video...one question....what or where are the gains in tunnel ram compaired to a duel quad (flat manifold).....?....have u ever compaired the 2.....I have only seen a compairson with a duel quad & a single 4 barrel....mayb this would be another video...?...thank u 4 shairing ALL your years of learing...reguards Brian

[@DavidVizard]

Brian, did that test 35 years ago. Tunnel ram every time!

[@brianalbrecht4423]

@@DavidVizard Thank u David....I figured that with the years of involvment & your pasion...that u mist have compaired the 2...Thanks David & good luck to u & Andy with the 318...I will be watching...have a merry christmas & a healthy & Happy New Year both or u & your faimlys...reguards, Brian

[@Privateones]

One way thin tin check flap intake design to prevent charge robbing

[@thomasmcglinchey2024]

Hi from a cold ireland

[@bcbloc02]

What suits a street motor better a tunnel Ram or a cross ram? The few dyno results I have seen show great promise in cross rams.

[@aaronanderson6892]

What if you was to weld in dividers in between the runners? Obviously shaped to desire. Kinda like a dual plane divider. Would that help give more signal to the carburator ?

[@DavidVizard]

For very advanced mods I weld shaped fins between seveal of the runners to better control things in the pressure mwave department. will show how that is done when I next have to do one. (might not be too long at that)

[@tannerlippiatt8387]

@@DavidVizard is this information applicable to cross ram style dual quad intakes much like what was available for DZ302s in the 69 Camaro? Would you suggest 1in spacers on cross rams as well?

[@jjgoyn5324]

Have you studied the 2000 onwards Mercedes ML320, 350, 400, 430, 450, 500, 550, from the W163 to the W166? Also I have a 2000 SLK with a 230 Supercharged motor in it, any help on making these run cooler and more economical would help, it would not hurt for them to have more HorsePower either. I am not a mechanic, but looking at your clips you appear to be the GOD of engines, you certainly do good work. Running water to cool the engine down and increasing octane is amazing, can that be done with the above Mercedes motors?

[@EricErnst]

With a 4-7 swap, you move the grouping from 657 to 421. It's essentially the same.

[@rickynelson3222]

Any video on synchronizing the carburetors on a tunnel ram

[@dondotterer24]

Thanks for the great videos. This is got me thinking about the Holley Z Duntov intake with the extra runner connecting 5 and 7. What was your experience with it? And would it even be good for a high torque truck application?

[@servediocylinderheads]

I know that intake and would not use it for a truck application. Go dual plane.

[@dondotterer24]

@@servediocylinderheads Thanks Charlie!

[@deanstevenson6527]

21:15 See, Uncle Squirrel 🐿️, DV Balmes Squirrels too ( Squirrels, Swirls, same Thang... 😁)

[@vinnylc]

Mr. Vizard I am studying intake wave pulse tuning for some time and keep hitting a wall with the formula. There seems to be a debate on the Ramchargers constant (K) (72) or according to phillip Smith (90). L=[(K) x C ÷ N +-3. Both formulas give a broad range of intake runner lengths, which do you use do calculate optimal intake runner length?

[@jamest.5001]

What if you ran two 450 or 600 carbs, without progressive linkage or secondaries, and had one barrel per port ? With only a small gap so all barrels saw vacuum from all cylinders, much like having Webber's or something, could this be any advantage? Much like running 4x 2bbl 350 Holley's or something,

[@voxnova9471]

Yes but the main benefit is being able to individually change jets so you can tune each cylinder’s fueling to equalize it out. Its hard to do without 8 afr gauges

[@raykieran754]

Does this thereory work for a single plane super victor style intake as well on a small block Ford,love the videos god bless you DV

[@raykieran754]

Sorry just finished the video and it answered my question,can't wait for the spacer videos

[@thomasmcglinchey2024]

What about info video about cosworth yb normally aspirated porting job deal

[@robertquesenberry8651]

How about the 4-7 and 2-3 swap on small block chevys

[@landonthompson5604]

David what happens if you change around the firing order like swapping 7-2 to 2-7?

[@travispfannmuller7717]

4 and 7 work because they are at tdc at the same time, 2 and 3 are running mates and are at tdc at the same time so it would be possible to get a cam ground that would accomplish that firing order but i've never heard of it being tried

[@ziptieracing]

@@travispfannmuller7717 that's the LS firing order at that point. 18726543 works nicely and is apparently easier on mains. It doesn't sound as good though.

[@telmosilva7355]

hi Mr David i really would love to know what are you toughts about spark plugs reading/chops. many things are said about spark plug colour like brown is good and whithe is lean, many say that with today fuel (10% ethanol, no lead) is difficult to achive a brown colour and if is brown most probably is because of a rich mixture. Can you please give your opinion in this subject? Im just trying to maintain my old carbureted motorcycle in good shape,, an old Yamaha XJ600 with 4 Mikuni carburetos, I know your videos are more for car guys but i believe many concepts can be applied in 4t motorcycles. Sorry my bad english!!!

[@andysteele4056]

Would this be worth doing on a tuned port plenum? The ports are round, so a little different shape.

[@michelcote]

I would like you to cover fuel injection and water injection as well. I am surprised that there is still people using carburators. Also, why there is no use of variable timming camshaft. It seem you thrive when you are limited by rules and have to optimise according to that but looking at what is possible outside that would be nice. Thanks.

[@Tig572]

I'm getting my die grinder out of the cupboard next time my T/R is off. 😀 Anyone know if adding a plenum spacer helps ??

[@thomasroth4695]

Does what you just showed with the firing order swap require unequal length header pipes changed or is that strictly a crank plane deal? Thank you. Just tryying to make sure i understand. Out of curiosity nascar stopped using moving parts in manifold. Was that a volume device or like a reed just to control waves?

[@TEN-TIMES-HARDER]

I missed that, I heard this on dodges but it seemed crazy to me

[@thomasroth4695]

kzbin.info/www/bejne/bGmxpqGfeLugnqs&feature=share. Its towards the end. You can google Ernie Irving 91 Daytona 500 also✌️

[@goldoverblack]

Please return to the "99% of headers are wrong" video. At 26:30 into the video your chart of primary header lengths have no data for cyl #7, but two different lengths for cylinder #1...please correct!

[@bamsportscollectibles2185]

do you offer a ship it to you porting service?

[@hotrodray6802]

Another video he says YES. about $ 4,000 per pair.

[@boharris8179]

Would this translate to a single plane manifold? would a knife edge be benifitial between 5 & 7....should have held my question🤣

[@beecj0]

.

[@inspectorbusiness4892]

When all else fails, baffle them with b.s.

[@slackthompson6984]

in the 1970s there were tunnel rams on the street all over the US

[@alfavulcan4518]

Yep, and gasoline was 25 to 35 cents a gallon! Those things hogged gas

[@matthewvarnam4302]

back in the 80's I seen a few tunnel rams driving around on the streets and at the track. The cheapest I remember gas being around $0.87

[@hotrodray6802]

@@alfavulcan4518 so what's your point? Because muscle cars are $$ gas is higher we shouldn't be hot rodding ??

[@alfavulcan4518]

@@hotrodray6802 I checked my post and nowhere did I say anything resembling that. Just stating an observation of the times cuz tunnelrams aren’t a common sight anymore

[@alfavulcan4518]

@@bigboreracing356 mmmmmm, again, where did I say ANYTHING like that, just observing a difference between then and now. If you want a modern muscle car or a modernized older car, knock yourself out. I like old hot rods, new muscle cars, sports cars, all types. The tunnel Ram was an observation of changing times. Nowadays it’s much more likely to see a high end fuel injection setup than any carbureted car. I like carburetors but one of my Alfa’s has a modified fuel injection set up. I never have or ever will say you shouldn’t be hot rodding. Clear?

[@thomasward4505]

Could you use a sandblaster to make the port finish rougher without all the grinding?