[Third Gen Racer]

I'm running Bosh 210s at 43 pounds base. Their getting into the high 80s on duty cycle. How much will raising the base to say 58 help that?

 

[Third Gen Racer]

Well one more google search and tada.

210 lb/hr Bosch
(43.5 psi) 224.3 lb/hr
(60 psi) 256.8 lb/hr
(75 psi) 288.0 lb/hr

 

[Orr89rocz]

Probably come down 10% or so. Maybe the amount of change in injector size from the fuel pressure change

 

[Third Gen Racer]

Probably come down 10% or so. Maybe the amount of change in injector size from the fuel pressure change

From the data I found. Using 88% duty cylce I think it would go like this.
224.3 * 88% = 197.384
197.384/256.8 = .7686 ( 77% ) at the same flow about 1580 lb/hr in my case.

 

[tempname]

I read somewhere that running at pressures as high as 100 psi can actually decrease volume. True or bogus?
Sorry my typing when I first posted was poor

 

[Third Gen Racer]

I read somewhere that run ing at pressures can actually decrease volume. True or bogus?

I belive it's true on dead head regulators like and old carb setup. But bogus on return style regulators after the rails on EFI.

 

[Chuckles]

Take a look at the volt/pressure/flow chart for the pump you are running.
It's not the regulator that will reduce flow when raising the pressure, it's the pump.

 

[tempname]

Take a look at the volt/pressure/flow chart for the pump you are running.
It's not the regulator that will reduce flow when raising the pressure, it's the pump.

Let’s assume the pressure is dead steady where it is set

 

[Orr89rocz]

I read somewhere that running at pressures as high as 100 psi can actually decrease volume. True or bogus?
Sorry my typing when I first posted was poor

Pressure is made from volume supply. If pump cant keep up volume then pressure wont be maintained. Its common with electric pumps. Mechanical not so much

 

[LUXFAB]

Injectors will flow more and more as pressure increases, as long as they open and close reliably. Some injectors have issues past 130psi. I have ran my car in the 120psi range as I had wired and selected fuel pumps that would do the job at that pressure. Most pumps don't do well in that region, injectors are fine tho, but I have not found a need to go any higher. 65psi base and 53psi boost was right at 117~118psi. DW400 pumps for anyone wondering was running two, now I have 3 but only because I was looking for a couple hundred more whp.

 

[tempname]

Pressure is made from volume supply. If pump cant keep up volume then pressure wont be maintained. Its common with electric pumps. Mechanical not so much

Mechanical is all I run

 

[tempname]

Injectors will flow more and more as pressure increases, as long as they open and close reliably. Some injectors have issues past 130psi. I have ran my car in the 120psi range as I had wired and selected fuel pumps that would do the job at that pressure. Most pumps don't do well in that region, injectors are fine tho, but I have not found a need to go any higher. 65psi base and 53psi boost was right at 117~118psi. DW400 pumps for anyone wondering was running two, now I have 3 but only because I was looking for a couple hundred more whp.

when they begin to not open snd close reliably, in which state do they generally fail? Open or closed?

 

[P.Lafferty]

How much hp can a guy make with bosch 210s?

 

[Just_send_it]

I run Bosch 210's at 80psi base, and have put 48 psi of boost into my junk.
The math says about 2000 at the flywheel using 16 of them on meth

 

[tempname]

How much hp can a guy make with bosch 210s?

How many and what fuel?

 

[P.Lafferty]

8 210s on e85?

 

[64nailhead]

8 210s on e85?

I’m making a little less than a 1000 at 48% DC at 80psi of fuel pressure with E85.

I’m sure they will handle 1300-1400 on E.

 

[Third Gen Racer]

8 210s on e85?

Calculate horsepower based on injector size

The injector size calculator calculate the amount of HP / KW an injector of a specific size can support. Calculate E85, e85 injector calculator E98

www.injectorrx.com

Bosch 210s are flow rated at 43.5. I have read they can be ran to 150 pounds net in short runs like drag racing.
@43.5 = 1500ish
@58 = 1750ish

 

[NiceShot]

I run Bosch 210s with an Aeromotive 7.0 60psi base and 40psi of boost on c16 that’s right about 2200hp to the tire and 85% duty cycle these injectors can handle some psi…

 

[LUXFAB]

when they begin to not open snd close reliably, in which state do they generally fail? Open or closed?

I'm pretty sure it was rpm dependent as well. I can't remember who did the testing, I think it was Shane T. A lot of RPM and a lot of pressure and they started doing something weird. I think they were having a hard time opening at the same rate and thus the curve changed a bit. Could have been 150 psi, I'm not sure sorry. I don't think they failed or got sutck one way or another, i don't want to mislead. I'd run them higher than I have if I had to and just keep an eye on it till I was comfortable.