ernesteugene, your CCV measurements sound interesting and I look forward to hear your findings. However, knowing the mods of Kris' and Mike's trucks I have a feeling that Kris may have an exhaust leak or an injector issue. Kris should have put down at least 20-30 more HP than he did.

Mike, did they get to everyone on the dyno list? I know I left early.

 

I agree Kris should have made more but I think it is fuel related.

 

Its got to be that sink strainer...........

 

Even with the regulated return ,tank mods and the Carter pump?

 

guys, see my other post, which you have probably already read by the time you come back to check this one. The fact that i had ***** to the wall 120 race acceleration from 2000-2750 tonight and barely nudged 20psi makes me think its an exh. leak. Peering at the pipes while the trans was out, i didn't see any new leaks.


Mike, in all seriousness i think that new filter gave me some much better mileage on the way home. The lieometer read ridiculously high compared to the rest of the trip, and i fueled up at the 440 exit onto 40W and i got home 472 miles with still 3/8 tank left.

EDIT- also, im leaning towards drivepressure leak, because i have plenty of smoke on the dyno, running the same tune as Tenn however the turbos are different. Mine should flow more air on the top end too.

 

I am not 100% sure what his system consists of before the stock pump. All the rest is the same or better. Now, I put my sump in after looking at the $200 unit they had on DI I believe it was. No lifting, a straight gravity fed shot to the pump. (Well, through the $3 fram see through to protect the pump).

Now, somewhere with a helper pump and all, I think therein lies a potential problem. I feel he would be far better off with a single better pump than 2. If both don't flow at the same rate, and even identical units won't, you will have a problem. If the first one outflows the second, there is the possibility of churning and who knows what other effects on the main pump. The opposite scenario doesn't merit words.

I know several folks use two pumps here and I will likely get flamed but I'm a firm believer in the old KISS principal.

BTW, Kris, glad that filter got put to some use. And I will run the one I have a bit longer so as not to be ****.

 

For a moment there I thought you weren't genuine, but I know better. I just spent some time looking for that billet sump and cannot find it anymore. Must have been another site or they don't sell it anymore. Oh well.

Oh, and Chris, I don't think they got everyone as it got dark but that last 95 dodge dually with the twin turbos and ford rims????? put out the most smoke of the day.

 

I think it was DI i saw it a few months ago. You have a good point if the pumps are not balanced it could cause cavitation on either side or just a plain restriction if the lifter was not keeping up with the OEM for some reason.

 

The aeromotive pump looks beefy enough to pull the fuel through a 5/8" line, a dahl 150, and push it into the injectors, right? I think i may end up selling the Carter and doing it that way. Think i could keep 3/8" on the pressure side?

 

Well Mike, you've got me sold on the idea! Since I have'nt done my pre-pump and tank mods yet, I think I'm going to do it. The Sink Stainer Sump Mod is next on the list!!!!!!!!!

 

Let me call DI tomorrow and find out what happened. They had a real good pictoral of the install for that unit. I just didn't have $200 + for that pretty billet unit at the time. Just want to make sure there was no other issue. Maybe didn't sell because folks didn't want to cut a hole in the tank and I have yet to cut my skid plate and reinstall it.

When my pump goes, I will be replacing it with a better one.

 

As I've been reading all the posts I've developed a few opinions. Mike, the sump was indeed a DI pump. I've checked everywhere I can think of and don't see it anymore. I'll be curious to see what you find out.

The Carter pump may cause some churning issues at lower RPM if it's trying to force pressure through the stock pump. However, it shouldn't be an issue at WOT, like a dyno run, thus not cause a drop in power for Kris. When I was looking into these pumps last year, I did see that the Carter has a free-flow rating of 100GPH or 72GPH depending on the model, either of which should be plenty of flow at WOT. I don't think it's a fuel delivery problem.

If you do want to go with more fuel delivery, try two stock super duty pumps inline with each other. I will be doing this. The Aeromotive pumps have had their fair share of failures, which they claim to have fixed, but they also said there was never a problem with their pumps and diesel fuel in the first place. I'm not convinced of their reliability yet. BTW, guess what Patti's truck has for fuel pumps.

Kris, if you're only hitting 20 psi at WOT in the 120 tune, you definately have a problem. Our setups are near identical, save for the dual HPOP setup, and that won't account for 6 psi of boost. Maybe 1-2 psi of difference, but then again my Spearco will drop that back down 1-2 psi, so our boost numbers should be identical. Like you, I did not see any exhaust leaks when your trans was out.

Finally (sorry for the long post guys), I don't think your dyno numbers were too low to be searching for a problem. On the dyno, you won't see max boost...I didn't anyway. My numbers were close to yours, and your numbers were close enough to Mike's that it can be chalked up to small differences in the tolerances of the engines. Mike may just have gotten a good one. Hypermax says that our stock injectors just aren't capable of putting out much more than 300 HP to the rear tires in our trucks. Max knows their injectors too - look at what they do in Patti's truck and Cale's truck.

The way I see it, you have a boost issue right now that you need to track down. Other than that, I don't think there's really anything wrong.

 

With dual sd fuel pumps, and no fuel bowl on the motor, what do you do about filtering? I can't figure it out, if you had two pickups in the tank, you would need 2 push pumps, 2 filters, then 2 sd pumps?

 

I'm not saying have two different pickups. Two pumps, inline, one in front of the other. Get rid of the lift pump alltogether. Keep the pre-pump filter setup.

BTW, here is another option if you didn't want to put a sump in the tank. Use a bulkhead fitting: http://www.jegs.com/webapp/wcs/store...55321_-1_10297

 

That two pump idea sounds very interesting. Thanks for the Aeromotive tip. I'm surprised as they sure have a good rep.

Again, I can see seperate dual pumps but I will never install two in line. I have nothing but instinct to back me up on that but I'm the boss of my rig.

I may consider a big rig pump. Gotta do some research there.