Competition Is head porting right for me?????

[Swamp Donkey]

On my 98 12v I want to get twins. Probably using my hx40 for a 40/HT3B combo. I will be getting the head o-ringed as well.



The reason for me asking if porting is right for me is because of the cost/benifits. Obviously I am going after 500+hp. I can be swayed either way. My 98 is more for fun but my main goal for it will be some 1/4 mile passes. I have run high egt's before and I figure with the twins and my water/meth I got last year for christmas egt's won't be that bad in a 1/4 mile blast. Will the "extra" air that a ported head gives me make that much of a difference. Thinking of going with a stage 2 port job.



Air + Fuel = Power. Is the extra "air" worth the money for my power situation?



Thanks.

John.

 

[DRadzierez]

no you will not see a huge if any gain

 

[RacinDuallie]

I don't know about 'extra air' it's minimal- but the speed which the air flows through the system is what your after when porting and polishing... ..... I say without a doubt- Go fer it.

 

[Hohn]

These heads are so bad out of the box, I'd consider ANY flow enhancement worthwhile if you're going to have the head off already.

 

[JGheen]

Just make sure you don't port it too much as that could kill your velocity of the air flow. Just keep it smooth and tight..... :-laf



Joe

 

[COMP461]

GUYS the only way to make power is to burn air, and fuel, most diesel guys have the fuel part right , that is the easy part , but cylinder head and cam shaft development programs are the only way to advance forward , no if ans or buts , if you not spending you pennies on heads and want to race on a serious level, then you lost.

 

[Swamp Donkey]

I may do the head porting myself. I have done some porting on some 440 heads with a kit I bought from mopar performance. I actually enjoyed it and I think I did a good job.



I did talk to Mark @ PDR, that is why I am asking if I need the porting. It seemed like alot of money for the porting. But I guess it can only be done by hand and having someone sit and port a head for 10 or 15 hours or whatever it takes along with the expertise does not come cheap. It is not that I don't want to pay for the port job, I am still on the fence as to if it is something I need.



What got me making the first call was the 12v heads on sale at PDR. So I want twins so this new head on sale will get o-ringed and then maybe a stage 2 port job and all the other bells and whistles. With all the bells and whistles it will cost around 4 times more than the head that is on sale! That makes a cheap Scotsman like me bunch up in some funny places!

 

[Jim Fulmer]

If your just wanting to tinker around with a head I would use the pics on www.piersdiesel.com and clean the head up then use one of there cams. The stage 2 port job is a good one. The 40/3B twins setup is hard to beat till you get really high in the HP hunt... ... remember the 40/3B was the first in the 750 hp zone( Jason Burton Sept. 03) and Doug Smith (Jet Pilot... . same time frame) with N2O... . 886 hp! I beat out Jason but still digging on Doug



Jim

 

[RacinDuallie]

taint nuttin wrong with gittin in thar yourself and smoothin things out a bit. . Take a look in the bowl just under the valves!! Horrible to say the least! Git in thar and open things up a bit. Try to make each port as equal to all the others as you can. And don't get greedy.

 

[thekidfan]

Ported heads do help. My stage 2 PDR head gave me 30+ RWHP no other changes! Do a search I started a thread shortly after mine was done! If your pushing it that far I'm not sure how you can't get a ported head. Good Luck either way, Don't forget if you haven't gotten all your goodies see if you can work out a package price, it helps them to sell multiples instead of a part at a time

 

[RacinDuallie]

Hey just asking here , But has anyone recorded the 'stock' intake and exhaust port volumes on a 12V head and 24V head ?

 

[12V Ford]

Check out Piers site in the tech. page link under head porting. There is a listing of stock flows.