turbo upgrade

[towcat]

my pump guy built a 4911 with the mechanical side from a DS4. he had a huge turbo on a modded 6.5 .the sky would turn black until the turbo spooled up. riding in the truck was like hyperdrive kicking in he never had it at a local track, there was just too many rigged items to be cleaned up before passing tech. he just wanted to see if he could do it. last I knew of his whereabouts is in Idaho. Hopefully he set up shop there.
I've always avoided the computer 6.5's as far as modding, so I can't help you on ideas.

 

[Dave Barbieri]

I've been tempted by the simplicity, but not tempted enuff to spend the time and $$$ to make the swap. I gotta tell ya, I've been real happy with the performance of my truck. The mods have been very straight forward, reasonably priced and I was able to do them here at the house. I've got a 6400# vehicle with the aerodynamics of a garden shed that is serious fun to drive and gets 18mpg. Let's hear it for computers!

 

[nitrohogg]

I suppose if I wanted any kind of mileage I should stick with the computer......

 

[towcat]

i get 18mpg on mime easily. it takes some really gentle driving to get to 20mpg.

 

[Dave Barbieri]

I've never seen 20. Gentle driving and keeping it around 62 - 65 nets me 18. FUN driving and getting in a hurry puts me around 15.5 - 16. I guess mileage sorta depends on my mood.

 

[nitrohogg]

same here 17-18 now, pulling my race trailer it's more like 11....but, its a 30' enclosed brick of a trailer and its a heavy one.......time to start a new thread.....

 

[mahatma171]

thats another topic I'm looking for advise on, If I want the most power I can get outta my 6.5 with all my other mods, whats the best I.P.? I was gonna keep runnin my original, but wondered if I should go with the mechanical? can I get all the fuel I want with mine and juice it up with the #9 and the marine injectors with a modded puter, or! Instead go with a mechanical one and turn it all the way up? thinking of the cost comparison also, but it really don't matter cause I plan on keeping my truck forever!

I think you can get as much power as you need with the DS4. However, there is something to be said for the dead-on reliability of the mechanical pumps. I know this is why Towcat is running his this way. If you do decide for mechanical, head for a 4911 pump, that was used on the early 6.5 engines.

I'm gonna have fun with the DS4 for a while. Wish me luck.

 

[turbonator]

We are running 5088 mechanical pumps, the same series as the 4911, these pumps have 2 plungers, 8 cylinder outlets, with plunger diameters of .310''. Same dimensioning as the 4911.......actually the pump is 2831 series. The difference between OEM pumps of the same series is the initial adjustment of the fuel delivery. This is a 15 minute job on the bench, 30 minutes in the truck, simple to do, very straight forward. We run just over the 4911 settings, with theoretical fuel delivery for about 220 hp.