Competition Port and polishing

[COMP461]

There is a place for every modification on a diesel. Port work is HP that is free in a sense, that it doesn’t have a down side, like a bigger turbo or huge By making the ports flow more, you reduce the restriction in the intake tract, the pressure goes down and the air is able to get past the valve and in to the motor, cam timing is a similar deal, open the valve higher and longer you get more in. the 130 lbs of boost that a few claim is just factor of improper cam timing and restriction. If you really work you head program, that boost will be down to under a 100. with some of the head work possible with a full on head program you could get that same amount of air in the motor at less them 50 lbs of boost . I would not rule out port work and a good cam for a mild street truck

 

[Sled Puller]

. the 130 lbs of boost that a few claim is just factor of improper cam timing and restriction. If you really work you head program, that boost will be down to under a 100. with some of the head work possible with a full on head program you could get that same amount of air in the motor at less them 50 lbs of boost .

We 'll there ya go.



Another site, last year, a different(?) Texan claimed he could make 500hp @ 15 psi. We all rushed out and ordered his parts.

 

[RWood]

I am not very knowlegable in porting heads so I will stay out of that part of the conversation. I always thought that twins were a small turbo combined with a larger turbo and this was done in order to maintain effeciency at lower power levels. It sounds like both the twins and Comp's pickup have the large turbos which are the important part of high horse power.

 

[MADDOG2]

There is a place for every modification on a diesel. Port work is HP that is free in a sense, that it doesn’t have a down side, like a bigger turbo or huge By making the ports flow more, you reduce the restriction in the intake tract, the pressure goes down and the air is able to get past the valve and in to the motor, cam timing is a similar deal, open the valve higher and longer you get more in. the 130 lbs of boost that a few claim is just factor of improper cam timing and restriction. If you really work you head program, that boost will be down to under a 100. with some of the head work possible with a full on head program you could get that same amount of air in the motor at less them 50 lbs of boost . I would not rule out port work and a good cam for a mild street truck

That's funny Comp cause I am making 130lbs+ of boost with bigger turbos than you, and I have a stage three ported head with bigger valves and a better cam than stock. I hit a max EGT in the 1/4 of 1620 (which I would bet is lower than yours) If we put our motors in the exact same truck at lets say 6000lbs with the same auto transmission I would destroy you, AND THAT'S FACT NO BOAST!!!! :-laf

You just keep your mid-size fiberglass pretend truck running 90-100 lbs of boost and you will get left behind.

 

[Sled Puller]

Really Comp, you best turn the wick up, or your tupperware will get blown off as a steel monster blows BYYYYEEEEE you!!!LOL

 

[RyanB]

$1500 for port and polish at 500 HP, is a waste of money. How far above are going? What are you going to do with it?



Clean it up a bit, call it good. The turbos will slam the air in, and you want all the strength you can get. These heads can, and do crack. You can't hoge them out like a SBC, and expect to hold 100 psi.

Honestly, I would check with Scheids, Haisleys or EEP, find out how serious they get, on the head. After all, noone has caught any of them yet, in the power department.



Not all of us have access to a dyno, that is set to make big numbers and sell parts with the results!!LOL



A decent set of twins on a 500 HP engine, and you will clean up COMPS tupperware on the street, as well as Old Sickly, towing a trailer. Oo.

I actually talked to Haisleys about this just over a month ago when they were just starting to work on my engine. Patty said that she wouldn't recomend it... said for the money there is no real advantage or gain when it comes to pulling. She said just like everyone says about any blown or turbo'd engine you are force feeding it and unless you are in the extreme HP range its not worth the time or money. She said that mine could be in the 800HP range and said even at that power range its more of a waste of money and even said to me "we don't p&b our heads here!)



Now I wouldn't say that its a total waste... I personal if I were doing it my self would just smoth down casting marks. Now matching the intake/exaust ports to the manifolds/gaskets would be good to do but nothing to extreme!



Thats my opinion anyway and just relaying was Haisleys told me!



Ryan

 

[TCluff]

Really Comp, you best turn the wick up, or your tupperware will get blown off as a steel monster blows BYYYYEEEEE you!!!LOL

NOW THAT IS FUNNY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :--) Oo. :-laf Oo.