Let's say you have a VE pump/injector setup that can flow 250 cc's and a P7100/injector setup that can flow 250 cc's. Base timing will be about the time for both setups, something streetable, not too extreme. For air, you are using the same compounds for each setup.

Even though both setups flow the same amount of fuel, the P7100 setup will make more power due to the higher injection pressure, correct?

 

Nope, pop pressure is set at the Injector................

 

The way I see it, injection pressure will depend on/be determined by the injector sizing vs. injection rate.

The VE may have the quicker rate, since the one plunger has to feed all six.

 

VE will make more power because it takes less HP to drive the pump

 

Depends on what rpm you wanna run

 

Don't forget the dynamic timing advance: Advantage VE

 

My question would be how much difference is there in a stock VE truck if you did the p-pump and it being stock and would you use the original turbo or the p-pump turbo or a different turbo all together. Seems like if you ask this guestion to 10indicate different people you get 10 different answers. I am new to this and would like a solid answer from people who have done it and know.

 

My 89+bolt ons =300rwhp

My 95+bolt ons = 400rwhp.

But fueled the same (cc) I still say the VE takes it.

 

I think you need to take into considerration the weight to Hp ratio

 

I guess I should mention for the purpose of this thread, both setups would be in the same weight first gen truck.

Basically, I am gathering info to decide on going P-pump or not.

 

X2 THAT'S WHAT I'm TRYING TO DECIDE ON

 

depends on how much power you want. It's pretty much as simple as that.

 

Talk to Terry (Crewcabxlt) he has gone from P pump to VE pump back and forth many times over the years. He tows a lot and He says top end is definately a different animal with a p pump, but for bottom end and streetability, the VE is a better route.

I'd say if you only want 400 to 450 and a good clean running streetable truck, I'd say stick with the VE. If you want the rpms and top end to get you over a hill with a load then the P pump might be the better route, but its not gonna have that low end grunt and its gonna be smokey til later rpms. I've noticed that a lot with my friends p pumped fummins when he tows my truck to the pulls.

 

smokenblacky austin is right, ive p-pumped 3 times now, ive owned p-pumped trucks, ive built 24v p-pumped motors. ive used 2 different 215 pumps and now a 180 pump. i know how to make them run. the p-pump trucks offer the cheapest/easiest h.p. however for 300 -400 hp the ve is BETTER than the p-pump. unless you need more fuel above 3000 rpm. if i set up 2 trucks with the same turbo/intercooler for a max boost of say 35-40 psi the ve has a broader powerband and is more drivable. towing the same trailer up the same mountain road thru corners the ve outpulls the p-pump. it lugs a little better. i dont run alot over 3000 rpm. i used to think the higher atomization would help performance but in testing i have not found this to be a noticable difference. a good ve pump set up right will flow enough fuel for a laggy single or towing twins. for serios h.p/compitition/hi rpm fuel go p-pump. the p-pump is a great pump but the ve is hard to beat for a daily driver/tow/mild street rod truck. i may switch to a ve again. we still have 2 ve trucks on the farm i mess with too.

 

follow-up post- like austin i ve been to a dyno event and beat some p-pump trucks and i beat the next closest ve truck by around 70 -80 hp. he had very simular mods to me, if you havent figured out how to get a ve to its full potential throwing on a p-pump may not help. my advice to 95% of people wanting to p-pump would be dont waste your time.