What to Know About Ported 12V Cummins Cylinder Heads | Parts Bin EP 21 | Power Driven Diesel

In episode 21 of the Parts Bin, Todd and Will discuss everything you need to know about ported cylinder heads. They cover flow gains and real world benefits of running a CNC ported 12V Cummins cylinder head and more. These stage 1 ported heads still utilize the factory sized valves but they pick up substantial flow gains throughout the valve lift range!
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[@Nathan-ds3sp]

Great work, but I'd love to see you throw em both on an engine back to back for real world gains

[@jeffbeaird747]

Love the setup of the flow bench, Old School baby.!!

[@idahobuckaroo8348]

That's a very simple, and great upgrade for a moderate build. Impressive.

[@JerryLee..]

Great product, and explanation of manifold pressure vs flow vs power! Always on point!

[@pddofficial]

thanks always trying

[@nephron9924]

Just signed my new grad nursing contract last week. As long as I don't croak from this covid mess, my dream is buying a 12v from you guys to put in my excursion. Can't wait to get started 🤟😁

[@greendodge98]

Damn you guys did it again!!!!!

[@halbritt]

Dammit, you guys keep coming out with these 12v goodies that I have to had. I was looking for something like this.

[@justinhowell8484]

Need to get an engine dyno and do a diesel version of engine masters.

[@petek6522]

You guys made it look light putting it on the flow machine... i guess porting it save waight too

[@Parents_of_Twins]

How do the 24V heads flow? I don't know if I have ever seen numbers on them. Increasing the flow is free horsepower so absolutely makes sense to go that route if you're need a head.

[@timothymroberts2949]

I'd love to see what this thing flows with a 1.75 exhaust valve. I'm sure it'd be well into the 200 CFM

[@halbritt]

@@pddofficial Guess I'll wait to order, then.

[@bayouboattrash]

Any plans for 24v and common rail trucks?

[@bdjm8595]

When will you have a 24V CR head ready for sale ?

[@coalstang]

i would love one in aluminum. 👍 a budget friendly factory replacement in aluminum.

[@RobRocker09]

I believe with stock high compression. I would think it wont hold up.

[@northsquirrel6465]

Youd really have to watch egts then.. start melting shit if it got too hot😂

[@coalstang]

Northsquirrel64 man it should be no problem Duramax diesels run aluminum head lots of the European diesels are in aluminum heads. Top fuel drag cars are aluminum heads.

[@coalstang]

Robert RobertD dmax does it. lots of euro diesels run aluminum head. should be nonissue.

[@descott1976]

How does this compare to the 370b marine engine head?

[@markrich3271]

Im really envious of what parts cost for 12v guys. Usually much cheaper.

[@CapeCodCNC]

Will you be doing this on a 24V?

[@GdunR6]

Wondering the same thing.

[@ronniewilliz153]

Great job but we can tell your reading off a tablet on he back side of the heads. But who elae can remember all that info. Great job guys

[@ronniewilliz153]

@@pddofficial i was just busting yalls balls. Then cfm numbers arnt easy to remember. An i got a ? Where should i start if my 98 24v cummins has bad connection to lift pump I got all mew filters for the truck an im gonna test fuel pressure as well but whatbelse should i check. Al the grounds are good.

[@keiferjanz3197]

Ronnie Williz the lift pump on a VP44 cummins is controlled by the ECM. You need a multimeter. Disconnect the wiring and check if you have power and ground at the lift pump connector. If you have 12v then you have the potential voltage needed to run a lift pump but possibly not amperage or more likely the lift pump is failed. If you don’t have 12v then you need to trouble shoot if it’s a loss of ground or positive. Check for 12v by testing with a known good ground. To test ground simple test is to ether continuity from battery post to the pin of the connector. Or test voltage with test lead on battery positive and other lead on connector. This will tell you what side of the circuit to troubleshoot. If you have ground and no 12v then your next step is to determine if it is the ecm or harness. You can check this with finding a pin out of the ecm and back probing the connector for 12v, if you have 12v coming out the ecm then issue will be the wire I’m the harness and you can just run a new wire. You could also continuity test the harness. If the issue is no ground then simply splice a ground. Also a quick test is to power up the lift pump with test leads and make sure it works. If it does then another quick option is to just wire the lift pump with a relay, key on signal wire and a fuse .

[@norcalray7182]

No 24 Valve ???

[@jeffbeaird747]

I’d like to see, at least, an exhaust manifold strapped to the head to see more REAL WORLD numbers. It might take a 3rd guy to get the head on the Flo-bench, lol. I think there are gains to be made in a less restrictive exhaust manifold on full throttle only applications. The exhaust pulse has to be choked by the immediate 90 degree turn it has to make.... just saying I am curious at a reading of exhaust pressure (PSI) before the turbo on a race motor, does that play a factor in high HP motors.? just my $0.02 Thanks for any response

[@g__wizz]

Ehhh exhaust manifold is just a funnel for the ultimate restriction.. your turbo. I would think that as long as the cross section was larger than the head it would not effect flow. That being said going bigger obviously has positive effect on egt.

[@bcbloc02]

I suspect under 2000rpm you will lose some torque cutting that much swirl out.

[@ShainAndrews]

Could possibly dimple the runners. For a daily driver that would be $$$....

[@ScottKenny1978]

Silly question: how much weight did you remove? Less than a pound?

[@g__wizz]

Probably more than a pound honestly.. take a head apart, the swirl ports are pretty large..

[@Wrenchgod1]

How about a 4bt head option?

[@g__wizz]

Its literally the same thing im sure they can do it.

[@justinamann1056]

What can you do for us Marine diesel guys, we run the 12v loaded up for hours. My 330B cracked one of those 5400 heads, running the marine 3967448nx head now. Can you port a 7448 head, always looking for more power and lower EGTs.....

[@victormiller7440]

When you ask a question of a specific youtube channel, add @PowerDrivenDiesel to your question so they are notified, otherwise they have to go through every single comment.

[@pddofficial]

We can port any Cummins head, price will depend on whether or not it's a common casting that we already have a CNC program for, or if it requires hand porting.

[@stevehall1667]

does it smoke badly without swirl ?

[@uglymechanics6599]

It can yes

[@ben_hamilton]

Perhaps I'm missing something but arn't these the same price as a Hamilton stage 1? Is it cheaper because you can reuse stock valves?

[@pddofficial]

It is slightly cheaper but with the porting I actually like this head better than the as-cast hamilton head.

[@ben_hamilton]

@@pddofficial Oh really, interesting. Well a new head is definitely going on this thing so I'll keep that in mind

[@austindoud273]

Is a newer 24 valve head any different from an older one port/flow wise

[@austindoud273]

@@pddofficial it amazes me that they haven't gone with an aluminum head

[@ShainAndrews]

@@austindoud273 For what advantage?

[@timkis64]

i had often wondered how much power companies like cat & cummins were missing by running heads basically as cast.with 13 to 15 liters, one would think small improvements would add up quickly.

[@g__wizz]

Apples and oranges. The stock configuration are optimized for much less rpm than these guys play with. Plus it represents the era when most things were designed for fuel efficiency.

[@ScottKenny1978]

On gas engines, the heads are getting to the point of being close to race flow in the ports, but with a fairly small cam limiting breathing. Not sure about diesels.

[@g__wizz]

@@ScottKenny1978 depends. The diesels run at much lower rpm, different theories on what is best for that under boost. The way they fuel is probably the best benefit, hence why even gas cars are going direct injection now.

[@ScottKenny1978]

@@g__wizz except that direct injection is least ideal at low RPM where cars spend most of their time. It's why the current generation of gas direct injection engines are still using port injectors for idle and low RPM, then direct injection once the engine speeds up. Not like a diesel that spends basically all its time at 2500rpm +-300 as long as the vehicle is moving.

[@g__wizz]

@@ScottKenny1978 thats not how diesels operate, especially a road going vehicle.

[@kevinsimonsii6605]

Idk if it's cause of the way you said it or because I haven't heard you say it, or because I don't hear it much because of people not wanting to offend others, or if it's a mix of all of those, but I laughed like a toddler when you said retarded lol js

[@lostaoulscustomz777]

Please sponsor me I wanna put your stickers on my truck this race season

[@111gregs]

save oil THEY need it escape rockets rich all building 1 weird fight back hep me hep me think

[@thelol1759]

God I wish I had a Cummins.

[@korn111685]

thelol1759 sell you a 98 12v. “Holy grail” why they call then that idk. But that’s what “it is”.

[@neorecormon1769]

8:29 that only applies if you dont add any additional heat to the air

[@g__wizz]

Chill out gale banks.. intercooler aka intake temps vs flow, flow will always win with hp.. plus intake temps specifically excessive ones are because turbo is running beyond its efficiency range..