Port & Polish Services/Stages - 3 angle performance valve job, We specialize in LS1 aluminum intakes, LT1 aluminum intakes, Mustang 5.0 Upper & Lowers, Dual Plane Intakes, Single Plane Intakes, Small Block & Big Block Cylinder Heads.  Mopar, Che I was thinking about getting the level 5. Would that make a differnce on a 6.9?

 

no one knows?

 

I am sure it wouldn't hurt anything lol. Just make sure that they don't take much off the head surface when they resurface them. The only clearance on them now is the head gasket.

 

hard to think it would be worth a grand.
even it added 20hp/40ft lbs would be a high price per hp.
id take that 1k and buy a turbo personally.
or with these fuel prices,hows about a Zf-5 swap to save some loot at the pump?

 

yeah i have been thinking about doing the transmission

 

Stage 5 and make sure they don't chew too much surface off. Then when you turbo the truck, the flow will be even better. Sounds like a winner to me!

 

Didn't realize it was a question.. First off, polish is not worth your time. I have done it with 460 heads on a pulling truck and it didn't mater much. Not enough to mater. These engines, it would mean even less because there is no air/fuel mixture going through the intake. Just air. Sure porting can help. Fords have always had exhaust ports that were to small. Our engines aren't Fords though. That is something you have to look into on the head. Probably wouldn't matter though. It is easy to build more boost then these engines can handle. With that being said you evidently have more then enough exhaust flow or this couldn't happen. Intake is the same. On a direct injection engine that you are trying to build 200+ lbs of boost then yes, it would matter. Another thing. Diesels, across the board, run a standard valve angle. Those fancy valve angles don't apply to these engines. Now we could have cams custom ground and play with valve timing but with our engine designed as it is, we are limited to what we can do. If we can find some CNCed direct injection heads that we can run our mechanical pumps then it is on. If we could find the time and turn these engines into true precombustion chamber engines that would allow us to run a different piston, we would have something also. We are kind of stuck.

 

ok i was making sure bc im planning on rebuilding the engine soon. I like the power it already has and I compelty forgot about the engine not being a ford engine. I work on diesels but this is the first one i have owned.

 

These performance tricks do help but not in our situation. Now there are things like this can do that would help a N/A engine but the addition of a turbo would take care of those and would be cheaper unless you were doing the work yourself. Porting is something anybody can do actually. Polishing also. Just have to figure where and how much. Trial an error.