Modded CP3 is on - Dyno and review:

[Tomeygun]

one thing I noticed:



Did anyone watch the run of TST8x8?



I mean I know my truck is an "SO", but most truck on 8x8 NEVER clean up the smoke. And that was super clean and at 522hp. What gives? being 50hp down from the HO's makes me wonder if I need a special TST box with longer pulse to make up for it.



time to call Mark...



It seems really hard to tell "over-fueled" smoke from the "low-psi rail, bad atomization" smoke...

 

[Tomeygun]

ohh and PS - call me crazy but I think my truck does not mind redline as much now.



It used to pop and sputter at 3100+, now it went past but just lost power at about 3300 (3rd gear is over FAST!!!)



see? just call me crazy :-laf

 

[AK RAM]

With the talk about a FASS being "modded" to maintain 40psi, does that mean an off the shelf FASS 150 with the correct springs in the regulator still can’t maintain 40psi?…that it has the be "modded" somehow?

 

[Tomeygun]

With the talk about a FASS being "modded" to maintain 40psi, does that mean an off the shelf FASS 150 with the correct springs in the regulator still can’t maintain 40psi?…that it has the be "modded" somehow?

Thats one of the questions I have... If the of the shelf FASS-150 puts about 20psi out stock from DPP -- Can the modded CP3 pull that down???



THats why I will most likely test the 150pump in stock form first, with a FP gauge etc.



The modding refers the the changing springs i nthe regulator to make 40psi, I do not know if the CP3 can draw it down or not

 

[GWoody]

I'm curious if the pump mod would pull down an Air Dog as bad. My air dog never drops below 15 psi even at wot on tst 8 x 8. I have to wonder if the air dog might be a little better, not trying to start a war, I've seen the fass pull down a little with tst on 5x5. Anyone have any thoughts?

 

[Jeff_K]

Has anyone ever seen a flow chart that shows what a FASS really puts out at 40 or even 15 psi?

I'd be interested in seeing a FASS flow chart as well. I am just having a hard time believing that we would need to supply a 150gph flowrate at 40psi to a stage 1 cp3. From what I see, the FASS 150 modded to put out 40psi is only compensating for the fact that its flowrate drops off severely when pumping against high pressure. There has to be a better solution IMO

 

[CATCRACKER]

i am going with a walbro 392 set up with regulator. i might add in the cat filter like the duramax crowd does after the cummins filter to boot but that is just my truck... . i figure i will save $400 and end up with a better setup but then again FASS seems to be the only pump the TDR group will even acknowledge :-{} ... .

 

[Gypsyman]

I'm feeding mine with the Walbro 391 right now at 640 hp. Haven't even needed to step up to the 392 yet and the 392 flows about 30% more. I guess time will tell.

 

[AEzzo]

I'd be interested in seeing a FASS flow chart as well. I am just having a hard time believing that we would need to supply a 150gph flowrate at 40psi to a stage 1 cp3. From what I see, the FASS 150 modded to put out 40psi is only compensating for the fact that its flowrate drops off severely when pumping against high pressure. There has to be a better solution IMO

This is the same thing I want to know. All the flow charts I've seen (even for EFI pumps that are designed to run at high pressure) the volume drops as the pressure rises.



I am running a Walbro 392 and it will push 80 GPH at 15 PSI but only 69 GPH at 40 PSI. This pump will run up to approx. 100 PSI if unregulated.



If anyone has a flow chart for either of the FASS pumps I'd love to see them.

 

[Tomeygun]

I'm feeding mine with the Walbro 391 right now at 640 hp. Haven't even needed to step up to the 392 yet and the 392 flows about 30% more. I guess time will tell.

I'm in the dark to the whole Walbro pump thing. I did a search and only found 2 threads, is there a master thread that talks about this pump?

 

[AK RAM]

I'm curious if the pump mod would pull down an Air Dog as bad. My air dog never drops below 15 psi even at wot on tst 8 x 8. I have to wonder if the air dog might be a little better, not trying to start a war, I've seen the fass pull down a little with tst on 5x5. Anyone have any thoughts?

I guess it depends on which Air Dog you have. From my understanding, they use the exact same motor. The differences are in the housing that has the air separator ports and filter hook-ups machined into them. Each company is just making their own housings, which shouldn't affect flow at all. I have the 95gph FASS and with everything set to kill mode and WOT sustained my pressure stays at 13psi constant at the CP3 inlet. If you have the 85gph Air Dog, I suspect you and I would both see the same results as Tommeygun. If you have the 140gph Air Dog, you may be OK.



I think the FASS has just been built up too much. Sure, it can flow 95gph, but free flowing into a bucket. Ask it to work for a living and it just can’t maintain any kind of decent pressure. If I can maintain 13psi at WOT and this Stage 1 CP3 only flows 12% more fuel than stock, the 95gph FASS should be able to keep up better than that if it can truly support 95gph at 20psi as advertised. That just doesn't jive.

..... FASS seems to be the only pump the TDR group will even acknowledge :-{} ... .

Patience young grasshopper. They are growing in popularity and will soon be socially acceptable. :-laf

 

[Gypsyman]

You can find them on the DTR site. This thread has links to MOST of the talk. A quick search will turn up even more.



Richard

 

[Tomeygun]

You can find them on the DTR site. This thread has links to MOST of the talk. A quick search will turn up even more.



Richard

wow, better grab a couple caffiene pills to read all that!



It does trouble me that Superduty says 60-70 gph to support 600hp. . Why am I not supporting 600? Why did my 95gph pump dump to 6psi when I needed it?



Guess I'll ask brad tomorrow...

 

[Tomeygun]

I guess it depends on which Air Dog you have. From my understanding, they use the exact same motor. The differences are in the housing that has the air separator ports and filter hook-ups machined into them. Each company is just making their own housings, which shouldn't affect flow at all. I have the 95gph FASS and with everything set to kill mode and WOT sustained my pressure stays at 13psi constant at the CP3 inlet. If you have the 85gph Air Dog, I suspect you and I would both see the same results as Tommeygun. If you have the 140gph Air Dog, you may be OK.



I think the FASS has just been built up too much. Sure, it can flow 95gph, but free flowing into a bucket. Ask it to work for a living and it just can’t maintain any kind of decent pressure. If I can maintain 13psi at WOT and this Stage 1 CP3 only flows 12% more fuel than stock, the 95gph FASS should be able to keep up better than that if it can truly support 95gph at 20psi as advertised. That just doesn't jive.



Patience young grasshopper. They are growing in popularity and will soon be socially acceptable. :-laf

BTW - nice video!!



What has that truck dyno'ed? if your only drawing down to 13psi (and Your certainly 575hp+ right?), something is maybe messed up with my pump.

 

[AK RAM]

I don’t know. Never been on the dyno. When people ask how much power I'm making, I usually say "almost enough". :-laf When I'm done, I'll have to get it on the rollers.

 

[onestackdram]

Ok guys the point about a 'pusher pump' is really a moot point. Meaning that it really doesn't matter what brand you choose to use. So long as you are suppling the pump with the proper amount of volume with appropriate amount of fp. So as far as a debate on which brand you have to use, is really not needed. If you have a brand that you prefer, then great, if not read what others may or may not like and make a choice for your self. Or call your local dealer and ask questions. Like I said, all we are trying to inform people of is the fact that without the proper volume and fp the pumps won't work the way they are designed.



Russell

 

[WUnderwood]

had to ask-are the Stage 2 pumps out?

 

[Diesel Power]

Ok guys the point about a 'pusher pump' is really a moot point. Meaning that it really doesn't matter what brand you choose to use. So long as you are suppling the pump with the proper amount of volume with appropriate amount of fp. So as far as a debate on which brand you have to use, is really not needed. If you have a brand that you prefer, then great, if not read what others may or may not like and make a choice for your self. Or call your local dealer and ask questions. Like I said, all we are trying to inform people of is the fact that without the proper volume and fp the pumps won't work the way they are designed.



Russell

well said russell

 

[Diesel Power]

had to ask-are the Stage 2 pumps out?

yes stage 2 are ready to go!!!!! :--) :-laf

 

[Tomeygun]

yes stage 2 are ready to go!!!!! :--) :-laf

Speaking of other stages, Let me say that I think the p-pump has its days numbered... .