New Ported head

[Don M]

Well, I finally got my cylinder head picked up today. Thanks to Cord Reynolds for helping me to get it back from Vegas.



Im so excited I finally got it I could not wait to show everyone a picture. I know this is trivial blather to you real diesel hot rod guys, but Im fairly new at it and very excited.

Ported and ready to slap on the engine. Cant wait.



Don~

 

[Deezul1]

Looks good, have it running tomorow with a test report right? hehe. I am very interested in the improvment, actually I dont think I want to know.

John

 

[Joseph Donnelly]

Be darn careful not to drive @high power and boost when in populated areas. That head will let your engine suck all the air out of the neighborhood and people could die from lack of air, kinda like altitude sickness

 

[DRR-24V]

Watch For Children !

Be careful you don't suck small children off the sidewalk.

 

[Don M]

I have a few neighbors that need the air sucked outta them. Maybe not die, just scare 'em a little.



Im glad to have this dude I can tell ya that. My wife was wondering what me and the oldest boy were hanging around in the garage sooo long for tonight.



Ive decided the valves will go in with the factory grinds and seats.

They seemed just fine as far as fit and sealing ability.



Would grinding on the exhaust valve stem near the head of the valve be a good idea? I have done it with gassers and had good results. Of course Im so dern gasser minded from years of hot rodding I cant help from trying to apply gasser stuff to diesels.



Don~

 

[Bad340fish]

Whoa... after close inspection of that picture I think you better send that sucker back!! It seems they forgot about 12 of the valves needed for super high HP



Keep us Posted!!

Clark

 

[Deezul1]

All them extry valves is just more weight to drag around besides they dont work without a bunch of electrons pushin on em all the time and that means a bigger alternater which is more weight so everybody knows that even if them 24V make more HP they aint as fast as a 12 V cause of all the extry lbs they are draggin around just slows em down.

 

[Don M]

24 valves will never make the HP we can! They are limited by their little fuel pumps and computer troubles.



Thats why Diesel Dynamics has the hybrid engine. 24 valve motor with the P7100 pump.



Clark,

the valves just cause a bad restriction in air flow. I want lower EGT's. I have decided to waive the valves this go round to make sure I get max airflow.



Don~

 

[Bad340fish]

Without those valves in there you should have room for another injector or two or three . I think DDs next project needs to be a 3 stage turbo setup with 2 P7100 pumps and dual injectors LOL.

 

[drawson]

Don, Cool, I guess I'll have to find time to put my ported head on.

 

[Brandon]

ok so who am i gonna get my ported head from guys?????

 

[Don M]

I got mine from Joe Donnelly. He has done a very good job on the head. He maintains a good flow without hogging the runners out and killing the durability. Heat is soooo important to consider when porting one of these babies. Some guys get their grinders out and make a mess when porting. I was not surprised to see Joe did a good job and didnt go crazy with it.







A new head is just a phone call away Brandon.



Don~

 

[4020Deere]

Did Joe touch the swirl dams or the bowls, under the valve? These are 2 areas that are very important for proper airflow. Unlike a gas engine, correct airflow in a diesel also relies on air swirl for correct combustion. Messing with the bowls or swirl dams can cause a decrease in power, if not done correctly. Did your head get run on a flowbench? If so was swirl measured? If it were me I would want to be sure that the swirl rate had not decreased, and only increased. Otherwise, you will not realize the performance increases you are looking for.

 

[Don M]

Hi 4020,



The bowls are not really ground on. Only a small amount to remove burrs and extra rough surfaces. Nothing major.

The valve guide area is smoothed just a tad and does not change the swirl characteristics of the head.

No, it was not flow bench tested. Most work was done in the exhaust side runner to try and get a symetrical runner size throughout. I was not too sure just how much swirl is in these cummins heads. I was amazed after what I saw.

Joe did state there would be little to NO power increase from the work. The idea is to try and get the EGT's to lower some and get the air in and out easier.

Here is a picture from Piers Diesel Research. It is similar to what Joe did on mine. Only Joe did more work on the intake side as well.



http://www.piersdiesel.com/PortHead.htm



Don~



BTW, the port job does not exactly match that of Piers, but it is close enough for an explanation.

 

[Forrest]

With 40 or 50psi waiting behind the intake valve, is there any swirl?

 

[Joseph Donnelly]

Take another look at the picture Don posted and you will see that the swirl aspects of the ports were not removed. Flow increases were sought, but not reduction of swirl. The head was not flow bench tested. Most if not all benches use modest vacuum not 30-50 psi driving pressure on the ports, so the validity of the tests is less than ideal. I used the dyno to ensure no hp was lost, even at low hp levels, inferring swirl was retained. Around 400 hp is probably the low end where folks get interested in egt reduction and flow enhancement by head porting. I tested a Ram at 390 hp before and after and verified no hp loss, no smoke increase, and no reduction in driveability. Another runs about 430 hp on diesel only with the small pump.



No doubt someone can do a better job with more scientific study. My goal was to gain 80-90% of the improvement consistent with daily driveability and durability under high temperatures, for a small fraction of the effort and cost. The first list member who gets 700 hp on diesel #2 only should show us how to do it "properly" I first applied head porting to the Cummins B in early 1999 and the only advice I was able to find from Cummins experts was "we did what seemed logical" from the LSR crew. Therefore I did what seemed logical to me based on my head porting experience since 1974.



Swirl and tumble are very important for fuel/air mixing, and the piston bowl shape is at least as important as the esoterica of head porting. When Sickly gets to 650 or 700, you will figure out that some inroads in such acrobatics have been reached.

 

[R.E. Miller]

Way to go Joe!

650-700 Hp I am only working to get a reliable 250 Hp out of my "aged" trucks Anyway just watch out you guys, because the TV keeps playing all of those commercials about GM having the most powerful diesel in a pick-up... . I come on the TDR and drive my trucks, then I chuckle