Stock VE w/tweeks... What injectors can it really handle?

[TRACTJDS0428]

Ive talked to Scheid and Haisley and several other shops and seem to give the impression that the
VE is the worst pump on the face of the planet. Now I'm not stupid but i see all kinds of guys all over making descent horsepower with the VE. I know its a low RPM pump and there is no need for governor springs and what not. But what injectors can it really handle? Scheid said no bigger than 40hp. Haisley's said i could go as high as 90hp. How big can i go before i damage the pump?

Then if i build the pump to 14mm and all the goodies what can it handle?

[The_Head]

Well, one piece of info you need to tell us is how are you going to supply it with fuel. I think Sheid is assuming you are still running a stock diaphram lift pump. If you upgrade your fuel supply you can run big injectors no problem. The VE's main weakness is the faster you spin it, the less fuel it supplies, and it supplies too much fuel down low for most peoples turbos.

The mainstream performance shops don't really know what the VE can do because most people give up on it and move onto other things.

[TRACTJDS0428]

running the low pressure piston pump conversion.

[RCCUMMINS89]

Whose pump?

[TRACTJDS0428]

CUMMINS PUMP. BELIEVE ITS FOR THE 4BT SO ITS A LOWER PSI FOR THE VE. WAS TOLD IF I TRY TO USE THE 6BT PISTON PUMP IT WOULD BE TO MUCH PSI FOR THE SEALS IN THE VE.

NOW IF THERE IS A GOOD PUMP AT LOW PSI SO I DONT HAVE TO DO ALOT OF WORK TO THE VE RIGHT NOW ID BE GLAD TO GIVE IT A TRY. JUST WENT WITH WHAT I KNEW.

[RCCUMMINS89]

IF you have the Cummins low pressure piston lift pump, then you have a quality pump. It will support decent amount of power.

I offer the 6bt p pump piston pump that I lower the psi for the ve pump application. But, the Cummins one does pretty darn good. Only difference is mine has a larger diameter piston and therefore will move a little more volume.

[TRACTJDS0428]

OK ILL CHECK THAT OUT. SO WHAT KIND OF INJECTOR WILL THAT SYSTEM SUPPORT? I HAVE A GOOD PRICE ON A SET OF 100HP INJECTORS AND HAVENT BOUGHT ANY CUZ IVE BEEN TOLD IT WONT SUPPORT THEM.

[RCCUMMINS89]

100hp injectors doesn't really mean anything. Whose are they? What size are they?

[Tacoclaw]

A piston pump, larger diameter supply line from the tank to the IP(including drilling out the banjo bolts or completely bypassing them), and an upgraded fuel filter would probably be able to feed up to 350-400 HP.

I don't know that it could supply it for an extended period of time but I would think you'd overwhelm the cooling system or turbo before fuel starvation became a concern.

[RCCUMMINS89]

Mine will keep up with 8ish psi with my set up that made 414..... I put in 24lpm larger injectors and it still holds 6psi. They do surprisingly well.

[TRACTJDS0428]

Mine will keep up with 8ish psi with my set up that made 414..... I put in 24lpm larger injectors and it still holds 6psi. They do surprisingly well.

Ok so i was just at your site and im thinking about going with the large piston pump. For information sake, what would you recommend from your site to get me close to 350-400hp. i have pretty much all the pump adjustments i can do and drilled banjos. i understand i might have to upgrade on air but what are some numbers on injectors? Or your part numbers?
The 100hp injectors i mentioned earlier were DDP and they didnt explain a size. So i getting the idea they may not be the route i want to take.

[TRACTJDS0428]

A piston pump, larger diameter supply line from the tank to the IP(including drilling out the banjo bolts or completely bypassing them), and an upgraded fuel filter would probably be able to feed up to 350-400 HP.

I don't know that it could supply it for an extended period of time but I would think you'd overwhelm the cooling system or turbo before fuel starvation became a concern.

Thank you very much for info. An extended period of time being miles or feet with a sled? And overwhelming the cooling system, meaning high egt's or engine temps? If i go with injectors the only time it will run hammer down is with a sled behind it or drag racing (on the strip of course). If i tow i wont be hard on it because i dont just beat on my truck all the time.

[RCCUMMINS89]

For turbo..... that depends on if you want a single or compounds and what your goals are... meaning how do you want it to act on the street as a daily driver and when/if you tow. Building a truck for the drag strip or to sled pull that you only do once or twice a year just makes a truck that ends up annoying on the street (laggy and hot).

As far as injectors, kind of same thing.... but in that 5x13-5x16 size would be where you would want to be.

But straight forward..... flow honed 5x14s, a 15 or 18 psi piston lift pump (yours might keep up though) and a 62/65 or a 63/65 would/should get you there with proper tuning. But, also that opens up head studs, valve springs, etc....

[TRACTJDS0428]

Ok so lets say flow honed 5x14's running 15 psi and an HX40? Or would i need something bigger on air? i kinda like the borg 60/68 you have too. really want to stay with a single for money and simplicity. It is a daily driver and tow a 30ft gooseneck now and again. My goals aren't really for a full pull monster as i live in Indiana and if it aint 1000hp+ i cant compete. But more along the lines of hazing some punk young kid in camaro or mustang or even daddy's truck, talking bs.

Head gasket isnt too far away as the truck is around 182K miles. just for safety sake. if i get that far ill do springs and studs then.

[RCCUMMINS89]

A 60mm compressor can get you to 400..... but not easily. I wouldn't want to recommend it to someone as it probably won't get you there.

AS for the hx40..... I've never been a fan of them. Large exhaust housings, slow to spool.