Anyone have a Dr Performance upgrade on a first gen Cummins?

[PJensen]

Just looking for feedback from people that have used the Dr Performance upgrade injection pump and injectors on the (rotary pump) on their first gen Cummins?



What other upgrades did you make before or after the Dr P. kits?

Turbo housings, exhaust, ported head etc etc...



What stage kits did you use 1, 2 or 3?



Did you have to upgrade driveline components?



How is the fuel mileage and power? Any dyno runs before and after for documented performance?

 

[drives mopars]

why that stuff

try lucas inj's if intercooler or pw's



1st also try to turn up pump some





it will shorten its life some



hp cost $$$



i was at 250 hp at rear tires or double stock



also call www.piersdiesel.com



or email me on tdr site search piers



he can sell you a pump



but for now ide 1 ) turn uppump

2 gauges 3 injectors

4 14 cm turbo



oh cheap also 1 ) remove kink in exaust pipe over axle



all this will get you to max hp for the rotRY PUMP



AND ALOT CHEAPER THAN DR. P

BY OVER 1/2

BILL

 

[drives mopars]

MORE

IF HIGH HP

IS WANT YOU WANT PUT YOUR $$$ INTO 2 ND GEN MOTOR

ITS NOT ALOT MORE THAN DR P AND WILL ADD VALUE TO

YOUR TRUCK BILL

 

[PJensen]

Im trying to figure out if they can really make more HP by NOT "Overfueling" the engine.



That is thier advertisement.



I know they charge $2,500 for stage 1 and $4,000. 00 for stage 3 kit for the first gen rotary pump and injectors.



I would go second generation Cummins but I already have a complete first gen truck for a donor vehicle. Planning on swapping the Getrag out for the NV4500 if its not too much more Ill go with the NV5600.



What is it that they do with a rotary pump that doesnt make it overfuel the engine? Everything I see about the tweaks on a rotary pump involve basic adjustments to the settings.

 

[drives mopars]

MORE

DONT BELIEVE EVERYTHING ABOUT DR P



I KNOW OF NO ONE HERE THATS DONE THIS ON TDR



BASIS THORY ON DIESELS



AIR AND FUEL = HP



THATS IT PERIOD



YOU NEED BOTH ROTARY WILL NOT FLOW ENOUGH FOR



HIGH HP 330 FLYWHEEL IS MAX



IF YOU DONT WANT TO FLOW MORE FUEL GO W/ INJECTORS



FROM PIERS AND 14 CM TURBO FROM HIM



AND OPEN EXAUST TURN FUEL UP SAY 10 PCT



DONT DO IT ANY OTHER WAY PERIOD!!!!!!!!!!!!!



PIERS WILL SET YOU STRAIGHT PERIOD

OR BRUCE OF DIESEL INJ OF PITTSBURG



IF YOU WANT HP OVER 250 AT TIRES

GO TO A 2 ND GEN MOTOR, IN YOUR 1 ST GEN TRUCK



CALL BOTH OF THESE PEOPLE 1 ST B4 Y OU DO ANYTHING ELSE

OR CALL DR P OR BANKS



BILL PS READ MY SIGNATURE

 

[drives mopars]

4500

4500 COST 3400 INSTALLED



5600 EST ABOUT 6000-6500 INSTALLED



I HAVE THE 4500 IN MY 93



IF YOU PLAN TO GO HP AND 4500



BUY A WRECKED 2 ND GEN 94-98 12V WITH 5 SPD



YOU WILL BE WAY AHEAD

 

[BushWakr - RIP]

Ya,... what drives mopar said.........

I have NOT used Dr. P but everything, and I mean everything I've read is less than stellar.

You can achieve much better performance, mileage, and dependability using other options.

Remember, power up = trans. life down.

1)Gauges, Gauges, Gauges... you need to establish a baseline and have a monitoring system.

2)Air in and exhaust out system

3)Pump timing, tuning

4)Injector change over with turbo housing (my choice would now be 14cm)



These changes will wake that thing up nicely, with room to grow if you want to get a little more wild.

Much of this can be done through Piers, or Joe D. for example.

Transmission, TC/VB up-grades are a whole other 'battlefield discussion'



I asked Piers to "guesstimate" my current HP with my mods and he though I'd be "around" 250 HP. He did also ask me to advise him how close he was when I get to a dyno to check it.



Edit: My current mileage is almost exactly 19. 5MPG city.



My . 02



Bob.

 

[drives mopars]

bushwacker

i did dyno on mustang at 215 then turned up pump more



i did run a 17. 4 same as 3/4 ton 2x4's



and better top end and mph then theres



and i am a 4x4 dually case in point



i was at max hp around 250 rw



what injectors are you running ?

 

[BushWakr - RIP]

I'm using the 180 HP marine app. BD injectors right now.



Bob.