Ultimate 6.2/6.5 engine build questions

[Ratman]

I'd give the guys at Pensacola Injection a shout, Ratman swears by his DB2 also, chides me all time about my loyalty to my DS4.

Aww now c'mon Tim, -it's all in good fun. Sorry I've been hard to get a hold of, -lots on the plate right now.

I like my DB due to its greatly improved smoothness and driveability with my manual trans truck, -ESPECIALLY in stop and go traffic. Whether the DB makes what a DS does is moot to me, -Matt at Peninsular assured me there is dang near 400HP worth of fuel that can be had from their DB2.

As far as DB versus DS.

I swear BY my DB, -I swore AT my DS. ):h

Happy Friday everyone!

 

[Turbine Doc]

Aww now c'mon Tim, -it's all in good fun. Sorry I've been hard to get a hold of, -lots on the plate right now.


Happy Friday everyone!

NP Rich I know,

Back at ya on the Happy Friday, oh don't forget those of you with wives & mothers still with you/us, Sunday is THE day, don't forget. Could be a bad day if you do

 

[Woody35]

what about a aftermarket cam in these engines. it can do wonders in gassers what about in these engines

 

[Slim Shady]

what about a aftermarket cam in these engines. it can do wonders in gassers what about in these engines

The cam is about as good as it gets for our engine, I doubt that the cam would net much more horsepower given we are in a forced induction engine and with the close tolerances in the head to piston clearance. There is not enough room to raise the lift or add much more duration.

Forced induction does not really needed a hot cam, we are pretty good where we are at.

 

[GJF]

The cam is about as good as it gets for our engine, I doubt that the cam would net much more horsepower given we are in a forced induction engine and with the close tolerances in the head to piston clearance. There is not enough room to raise the lift or add much more duration.

Forced induction does not really needed a hot cam, we are pretty good where we are at.

It seems with a diesel no one really fools around with cam profiles. The engine reacts to powerband changes based off the flow capabilites of the turbo. You can remove the intake manifold completely off a diesel while it's running and experience no change. Try doing that with a gasser and it's all over.
With the camshaft in a diesel there is no throttle blade to regulate air velocity. The camshaft in a diesel are usually an optimum profile and the amount of fuel injected is what dictates the power available. The more fuel injected the more boost it needs. If you don't add boost the motor will burn up. It is the complete opposite of a gasser with a turbo.

 

[Slim Shady]

It seems with a diesel no one really fools around with cam profiles. The engine reacts to powerband changes based off the flow capabilites of the turbo. You can remove the intake manifold completely off a diesel while it's running and experience no change. Try doing that with a gasser and it's all over.
With the camshaft in a diesel there is no throttle blade to regulate air velocity. The camshaft in a diesel are usually an optimum profile and the amount of fuel injected is what dictates the power available. The more fuel injected the more boost it needs. If you don't add boost the motor will burn up. It is the complete opposite of a gasser with a turbo.

Well stated :thumbsup:

 

[GJF]

Slim, TD stated he wouldn't put the IC back on and now he is going WMI. Is your IC the same size as his or is it bigger? If it is bigger are you still going to keep it on?

 

[Slim Shady]

Slim, TD stated he wouldn't put the IC back on and now he is going WMI. Is your IC the same size as his or is it bigger? If it is bigger are you still going to keep it on?

My IC is larger and I am probably going to remove it and go without, Now if I towed heavy having an intake air charge temp around 100 F all the time under load would be ideal and my intecooler is large enough that it will do that. But a little warmer air temp improves mileage, this has been proven.

 

[GJF]

OK.... thinking again on differnt materials or new ones ect. I never really cared for the concrete block fill material. But I did some custom head work on some Toyota hemi cylinder heads. The problem we had was the port walls got so thin from flow bench testing. We talked to composite specialist and came up with a 350 degree epoxy that we end up doing a multistage pour. We then had to machine passages for push rods. It allowed us to port further to make the flow rates we wanted. Now instaed of the concrete maybe use this high temp epoxy to fill the block. It adheres far better than the concrete and would help dampen resinating vibrations. I have seen on BBC the concrete fill break up in chunks after time. I don't think the epoxy would do this. The epoxy is like $200 a gallon. Might be a step up from the norm. I'll call them this week and see what the chemist thinks.