Hey Josh, I do have more info on these and will try to get a hold of you. I will also be posting more videos of the tools we found to be the most helpful in the porting process. After having done 4 of these now, we can move through them a lot faster. The best thing that we found is to think hard about air flow patterns and keeping everything smooth and even. From what we have found we have tried to make all the curves as gentle and smooth as possible. Also, Before you ever start try to sketch out or pre-plan what you want your end result to look like. I almost ruined my first one by not thinking a head.
Robi1nz, The torque is good but I wont say great. That could be due to a number of reasons on this particular motor. Obviously, the larger runner and port size slows down the air speeds but allows for higher flow numbers. The other reason is because the timing on this motor is set to 22 degrees, which added some top end but hurt the low end a little. Now, with that said, when common rail guys climb in my truck they say " Wow, these 12 valves sure have low end torque." So the torque is great for common rail guys but but as good for stock 12 valve guys. There were too many changes to the truck to be sure about the boost or lag. I will tell you that this motor produces about 45 psi with a set of DAP 5x14 injectors, Hamilton 188/220 and a modified 180hp p pump. That is a little low for what a lot of guys see and we figure that is because of the free flowing nature of the ported head. We are to 45psi by 2200-2300 rpm which I think could be lowered by switching from a industrial style 12 valve exhaust manifold to one with a middle exit and a better flowing design. I am tying to book some dyno time and will post all the numbers that I get and the video of it being dynoed. We recently racked the barrels on this 180hp pump and have seen a solid improvement in the top end response. The pump has been worked over as it can without taking it into a shop ( that maybe in the near future just to get it balanced) The last thing I wanted to say about this is that as we drive the truck more and tow more with the truck, we are truly happy with how will it does above 2000rpm. Even will a lot of fuel it will stay at 900 degrees towing a 10000lbs trailer down the freeway at 75mph. That's not too bad in my book if you consider we are doing it with a larger single. Towing is not an issue with this truck. I recently towed that 10k set up a 1000 miles and got about 13 mpgs. As the motor breaks in, that number should go up a little. I will be posting a bunch of Cummins Videos in the next little while so subscribe if you want more info... Hope that helps and keep the questions coming!
Are those aftermarket valve seats instead of the stock cast ones? I need info on them as my brand new oringed head I bought has casting void on one of my intake valves that is barely sealing with minimal material. I wanted to cut the stock valve seat out and press in an aftermarket seat in place of it.
eally interested to know the do's and do nots of the porting on the chinese heads...... i just started porting one this evening. any thing to look out for would be great!
How is the torque now in the low range. Do you notice any difference in boost pressure or lag. It looks to me to be a stage 2 type porting job. Have you had it on the dyno yet.
To be honest it's not bad work but on the short side you can angle the seat towards the swirl direction taking your tool at a slight angle while working the seat. You can take all of the seat angle on the intake and not effect flow in a bad way... I like porting the front and back of seat in relation to swirl. It helps deshroud the valve in key areas. Where it's needed in this take you can gain more from the seat flow and not the ports directly. Looks like your new ports here will outflow the valves 2fold. I agree with not going crazy I'd like to show your guys how far Ive ported my own 24v heads haha I start out conservative then I go nuts, it's a habit. But they always turn out better flow than anything you can buy on the market but your also putting in 54-70hours per head going my route
We would love to see what you have done on yours! Take some video and post it, then just shoot us a link! Isn't crazy how long a good port job takes!!!! We are much faster now, but our first couple of heads took forever!
Joelyboyblue, I know it has been a while, but I wanted to let you and others know that I feel like I have finally driven this truck long enough to really say how it has performed. I am planning to make a follow up video soon.
Hi man my name is josh clark thanks for the 12 valve port video i am trying to do one myself but this will be my first port job do u have any more information u could tell me
with the work on the exhaust side you should pick up some considerable numbers on the torque front. you dont show the runners on the inlet. how much meat did you take off there.
Hi Robert! Thanks for the note. We do feel like we gained a lot of flow with our port jobs. We didn't show the intake side because we didn't mill off the intake shelf and without doing that you really can see much. All the work we did on the intake was through the valve side of the head and with our long 6 inch carbide burr. We have run these heads long enough that we are going to be doing a video about how we feel they run and what we think worked and what didn't. Good luck on your projects!
Hey Mark, There are a few places that make aftermarket heads, but the thing that blows me away is that most of them have really poor quality control. And they are pretty expensive to boot! That leaves most of us learning how to do a basic port and polish on them.
Thats what im saying I know a few guys make them a ew guys stopped but there very over priced. Unlike lets says a sbc engine you can get a pair of bare aluminum performance heads for 400$. Usually a engine this popular would have allot of company's casting aluminum heads.
I hear ya man. There is a huge Cummins following, but we haven't gotten much love from any of the big aftermarket performance companies. If they came into the game it would really drive the over-inflated prices down.
As sad as it sounds . I see huge price decreases only when china copys a product. Thats why SBC heads are 400$. There direct knock offs of darts. Honestly Ive had a set on my 1000hp turbo truck for years no pro Example china knocks off turbos prices start coming down.
For a performance head for a 12v the Hamilton warhead is an awesome head. Intake and exhaust are ported and it’s cut for big valves. They flow a lot and since the warhead Dosnt have the stock intake shelf you can run a runner intake.
We're having a conversation about cummins head porting over on CF, it would be really cool if you could join in! www.cumminsforum.com/forum/94-98-performance-parts-discussion/1807001-head-porting-4.html
Dallas, Sadly, I only have a few links. To learn how to do this we spent tons of time reading and searching. Here are a few I saved but there are many others out there that are also good. Here is the 1st link: www.competitiondiesel.com/forums/showthread.php?t=59175&highlight=junker+drag+truck+build&page=71 This link is going to take you to page 71 which is where the porting and polishing starts but it a threat is really good one about building up a 12 valve. The #2 link www.dieseltruckresource.com/forums/1st-gen-ram-all-topics-93/head-porting-266131/ . Link #3 www.pirate4x4.com/forum/dodge/1394650-porting-polishing-5-9-cummins-head-does-help.html. I will also be adding a video soon, trying to show the areas that we worked with on a unported cylinder head so please keep an eye out for upcoming additions!
Hey Josh,
I do have more info on these and will try to get a hold of you. I will also be posting more videos of the tools we found to be the most helpful in the porting process. After having done 4 of these now, we can move through them a lot faster. The best thing that we found is to think hard about air flow patterns and keeping everything smooth and even. From what we have found we have tried to make all the curves as gentle and smooth as possible. Also, Before you ever start try to sketch out or pre-plan what you want your end result to look like. I almost ruined my first one by not thinking a head.
Robi1nz,
The torque is good but I wont say great. That could be due to a number of reasons on this particular motor. Obviously, the larger runner and port size slows down the air speeds but allows for higher flow numbers. The other reason is because the timing on this motor is set to 22 degrees, which added some top end but hurt the low end a little. Now, with that said, when common rail guys climb in my truck they say " Wow, these 12 valves sure have low end torque." So the torque is great for common rail guys but but as good for stock 12 valve guys.
There were too many changes to the truck to be sure about the boost or lag. I will tell you that this motor produces about 45 psi with a set of DAP 5x14 injectors, Hamilton 188/220 and a modified 180hp p pump. That is a little low for what a lot of guys see and we figure that is because of the free flowing nature of the ported head. We are to 45psi by 2200-2300 rpm which I think could be lowered by switching from a industrial style 12 valve exhaust manifold to one with a middle exit and a better flowing design.
I am tying to book some dyno time and will post all the numbers that I get and the video of it being dynoed. We recently racked the barrels on this 180hp pump and have seen a solid improvement in the top end response. The pump has been worked over as it can without taking it into a shop ( that maybe in the near future just to get it balanced)
The last thing I wanted to say about this is that as we drive the truck more and tow more with the truck, we are truly happy with how will it does above 2000rpm. Even will a lot of fuel it will stay at 900 degrees towing a 10000lbs trailer down the freeway at 75mph. That's not too bad in my book if you consider we are doing it with a larger single. Towing is not an issue with this truck. I recently towed that 10k set up a 1000 miles and got about 13 mpgs. As the motor breaks in, that number should go up a little.
I will be posting a bunch of Cummins Videos in the next little while so subscribe if you want more info...
Hope that helps and keep the questions coming!
Are those aftermarket valve seats instead of the stock cast ones? I need info on them as my brand new oringed head I bought has casting void on one of my intake valves that is barely sealing with minimal material.
I wanted to cut the stock valve seat out and press in an aftermarket seat in place of it.
eally interested to know the do's and do nots of the porting on the chinese heads...... i just started porting one this evening. any thing to look out for would be great!
Having troubles finding good info on where to take material from. Do you have links?
Thank you
How is the torque now in the low range. Do you notice any difference in boost pressure or lag. It looks to me to be a stage 2 type porting job. Have you had it on the dyno yet.
To be honest it's not bad work but on the short side you can angle the seat towards the swirl direction taking your tool at a slight angle while working the seat. You can take all of the seat angle on the intake and not effect flow in a bad way... I like porting the front and back of seat in relation to swirl. It helps deshroud the valve in key areas. Where it's needed in this take you can gain more from the seat flow and not the ports directly. Looks like your new ports here will outflow the valves 2fold. I agree with not going crazy I'd like to show your guys how far Ive ported my own 24v heads haha I start out conservative then I go nuts, it's a habit. But they always turn out better flow than anything you can buy on the market but your also putting in 54-70hours per head going my route
We would love to see what you have done on yours! Take some video and post it, then just shoot us a link! Isn't crazy how long a good port job takes!!!! We are much faster now, but our first couple of heads took forever!
That will help getting the intake ports with sanding rolls
@@70440charger I will have a few videos posted soon as I can get them edited
Would love to see an updated vid, hows it perform now
Joelyboyblue,
I know it has been a while, but I wanted to let you and others know that I feel like I have finally driven this truck long enough to really say how it has performed. I am planning to make a follow up video soon.
Hi man my name is josh clark thanks for the 12 valve port video i am trying to do one myself but this will be my first port job do u have any more information u could tell me
with the work on the exhaust side you should pick up some considerable numbers on the torque front. you dont show the runners on the inlet. how much meat did you take off there.
Hi Robert! Thanks for the note. We do feel like we gained a lot of flow with our port jobs. We didn't show the intake side because we didn't mill off the intake shelf and without doing that you really can see much. All the work we did on the intake was through the valve side of the head and with our long 6 inch carbide burr. We have run these heads long enough that we are going to be doing a video about how we feel they run and what we think worked and what didn't. Good luck on your projects!
Ive wondered why aftermart high performance cylinder heads are not offered.
Hey Mark,
There are a few places that make aftermarket heads, but the thing that blows me away is that most of them have really poor quality control. And they are pretty expensive to boot! That leaves most of us learning how to do a basic port and polish on them.
Thats what im saying I know a few guys make them a ew guys stopped but there very over priced. Unlike lets says a sbc engine you can get a pair of bare aluminum performance heads for 400$.
Usually a engine this popular would have allot of company's casting aluminum heads.
I hear ya man. There is a huge Cummins following, but we haven't gotten much love from any of the big aftermarket performance companies. If they came into the game it would really drive the over-inflated prices down.
As sad as it sounds . I see huge price decreases only when china copys a product. Thats why SBC heads are 400$. There direct knock offs of darts. Honestly Ive had a set on my 1000hp turbo truck for years no pro
Example china knocks off turbos prices start coming down.
For a performance head for a 12v the Hamilton warhead is an awesome head. Intake and exhaust are ported and it’s cut for big valves. They flow a lot and since the warhead Dosnt have the stock intake shelf you can run a runner intake.
We're having a conversation about cummins head porting over on CF, it would be really cool if you could join in! www.cumminsforum.com/forum/94-98-performance-parts-discussion/1807001-head-porting-4.html
Dallas,
Sadly, I only have a few links. To learn how to do this we spent tons of time reading and searching. Here are a few I saved but there are many others out there that are also good. Here is the 1st link: www.competitiondiesel.com/forums/showthread.php?t=59175&highlight=junker+drag+truck+build&page=71
This link is going to take you to page 71 which is where the porting and polishing starts but it a threat is really good one about building up a 12 valve. The #2 link www.dieseltruckresource.com/forums/1st-gen-ram-all-topics-93/head-porting-266131/ . Link #3 www.pirate4x4.com/forum/dodge/1394650-porting-polishing-5-9-cummins-head-does-help.html. I will also be adding a video soon, trying to show the areas that we worked with on a unported cylinder head so please keep an eye out for upcoming additions!