View Full Version : Mod CP3 or duals?
GCarlton53
08-10-2010, 07:50 PM
To run a set of 90 hp or 150 hp injectors and a Smarty will a mod cp3 help or i are duals the only way to go? I have seen these big % pumps and i have had people tell me they are junk and u can only flow so much, and just go with duals to see a difference. any advice?
speeddemon619
08-10-2010, 08:46 PM
IMO alot has to do with what your doing with the truck. I know some pulling associations will only permit one injection pump for certain classes but I am not sure what your doing with your truck. Personally I don't see the big hoopla with dual pumps, it's a great setup but makes things look very cramped and limits classes.
DIESEL_POWER
08-10-2010, 08:59 PM
Screw the duals, go with the II 120% single cp3.....it flows more than two stock pumps and diognistics is simple.
Big Swole
08-10-2010, 09:03 PM
Just buy a Flux capacitor and be done with it!
94ttss
08-11-2010, 12:09 AM
Duals every time, no comparison to a single, unless you have to run a single to stay in a particuler class. You can have duals for the cost of a modded single. Evil Twin Kit $1550, used pump $200-$400.
SPEAKSUP
08-11-2010, 01:09 AM
Older broke down pumps still wont flow as much as a nice modded pump cause they are rebuilt. The only reason for dual's is your running huge injectors. Cause there's guy's running 200 hp tips on a modded pump.
Plus with the Duramax it's just easier to go with the dual's since the CP3 is in the Valley. I say go with a single cause it does make the bay looked cramped. I like clean looks IMO.
SPEEDSHIFT
08-11-2010, 12:07 PM
Duals.
SCHOOL BUS
08-11-2010, 12:35 PM
Older broke down pumps still wont flow as much as a nice modded pump cause they are rebuilt. The only reason for dual's is your running huge injectors. Cause there's guy's running 200 hp tips on a modded pump.
Plus with the Duramax it's just easier to go with the dual's since the CP3 is in the Valley. I say go with a single cause it does make the bay looked cramped. I like clean looks IMO.
I didn't no smarty had a programmer for dmax's???
If your gonna do anything do duals. Do some research on here and you'll see.
GCarlton53
08-11-2010, 06:30 PM
Thanks, I want about 700 hp , trying to stay out of severe mods and internals. and it gets drove about 5k miles a year.
SCHOOL BUS
08-11-2010, 06:59 PM
I did 630 on fuel only with a stock pump and 90's. 730 with nitrous
jordanjames81
08-11-2010, 07:13 PM
I say large single, It what im running on my puller. Im running a II single CP3 with large injectors in can hold 26k or better going down the pull track. I see no reason for dual pump's.
SCHOOL BUS
08-11-2010, 09:00 PM
do you daily drive the puller?
jordanjames81
08-11-2010, 09:47 PM
No daily driving here its a trailer qeen
SPEAKSUP
08-11-2010, 10:34 PM
What about a smarty and a Duramax? I don't see that in my post.
TheBigNasty
08-11-2010, 10:38 PM
I say large single, It what im running on my puller. Im running a II single CP3 with large injectors in can hold 26k or better going down the pull track. I see no reason for dual pump's.
I have no basis for this statement BUT......I imagine if you were to compare data logged graphs of large singles vs duals you would be able to see a difference in support of duals.
Joesixpack
08-11-2010, 11:23 PM
150's.??????....big singles are going to run them no sweat. Size the pump/pumps to the nozzles. I wouldn't complicate it with twin pumps either if thats all the nozzle you plan to run.
I have no basis for this statement BUT......I imagine if you were to compare data logged graphs of large singles vs duals you would be able to see a difference in support of duals.
Data logs are pretty sweet of FCA PWM. Shows exactly how much pump your using....how much pump you have left.
TXAustin
08-12-2010, 12:05 AM
The main advantage you will have with duals vs a single is low RPM PSI and more volume of fuel. I am running 150hp nozzles(looking to go bigger) and while staging at the track I see 23000psi before I am even moving vs my stock cp3 with 90hp nozzles that would be 10000psi while staging. Really helps 60' times IMO.
GCarlton53
08-14-2010, 10:59 AM
what size wicked pump are you running?
jlibert
08-14-2010, 12:45 PM
For 700 hp with 150 hp nozzles, a GOOD single pump will do it. Anything more and duals would be the way to go. I have personally seen good and bad pumps come from all of the bigger name shops.
TheBigNasty
08-14-2010, 01:19 PM
Data logs are pretty sweet of FCA PWM. Shows exactly how much pump your using....how much pump you have left.
Yeah yeah keep bragging LOL
I was more thinking of a rail pressure log, I would imagine the duals would come on faster and have a smoother graph. But like I said, just how I think it would work....not necissarily how it does work.
GCarlton53
08-18-2010, 06:54 PM
so no pump shop in particular is better than the other, for the most part? I know there is only so much they can do it is a little like a trans. all u can do is do it
tcalvin
08-18-2010, 07:20 PM
I got everything I wanted out of the II 120% pump I used to run. Had one of their smaller pumps on before and it wouldn't support the 150's I had from Wicked. Made 733/1305 @ around 50 psi with a 71/73-13. RP was never an issue with the larger pump. I vote single until you decide on larger injectors.
TopFueler
08-18-2010, 07:25 PM
I do agree that the Double Dragon is a bigger pump but a truck made 869hp at our dyno event with a 85% Dragon Fire. Still a nice pump!
tcalvin
08-18-2010, 07:47 PM
The pump I had before was a 33% pump. It just wouldn't keep up with what I was trying to do. I'm sure the 85% pump does very well.
cameredi
08-18-2010, 08:22 PM
If this is a Cummins, I will give you my experience. For 90HP injectors you can run a stock pump if you have a FASS/Airdog or something to back it up. Stock CP3 will hold 23K w/Smarty set to 9, TST 2/1 and 90hp injectors. If you want to have more fuel available bag o parts, secondary fuel line and modded Fuel rail will give a better bang for the buck than 3k+ on duals.
But you also need to think of the future
YMMV
-chris
Blacksdieselhp
08-18-2010, 10:15 PM
The truck in my sig is running the II 120% single pump. It runs low 11s fuel only and is daily driven with no problems or complaints at all. I had dual cp3s and flux 3.5s. Then I went to flux 4.5s and the single pump. No way i'll ever go back to a dual cp3 setup.
jordanjames81
08-18-2010, 11:22 PM
i for one can say the double dragon brady is one hell of a pump. Mine is doing awsome with the large injectors you sent earlier this year. Rail pressure isnt a problem eighter. I will stay single pump.
TopFueler
08-19-2010, 05:46 AM
Glad to see you like it.
GCarlton53
08-19-2010, 07:04 PM
what liter is a 90hp stick? vs a 150 or 200. i think a stock is 30. and how do you calculate how big of a pump one would need? LPh x 6 or do u have to factor in a certain percentage for maintaining the rail?
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