As the subject line said, someone told me you can have the 19 lb AC units 'converted' to 24 lbs..................doesn't sound right to me.

What's the scoop, experts?

:lala:

 

I think the costs of converting an old injector would outweigh the 200 price of NEW injectors

 

Forget it. Waste of money.

 

Never heard that one before. I suppose its possible, but by the time you are done you could probably buy 5 sets of 24# injectors. Not to mention you'd have new injectors rather than some hacked up stock ones.

 

Any other opinions/facts? I cannot believe this is even a possibility, let alone something someone would spend $$ on, considering what you can buy new injectors for..............thanks.

 

If you run the injectors @60 psi, then the resultant flow would be 22.3 lb/h. Not quite the 24 lb that you were looking for, but almost. I'm surprised that nobody else even hinted at this. The higher pressure will also give way better atomization, and thus make your engine more efficient, and maybe not require 24 lb injectors, because more of the fuel is exposed during combustion. The one thing about these engines is that they will react to proper mods by giving more HP, while at the same time keeping the same fuel efficiency. If you are concerned about the high pressure, don't be. They are designed to handle up to 72.5 lbs safely. However, the o-rings would have to be in good shape. Not to mention the fuel pump, the stock fuel pump is marginal at best. The reason that the pressure requlator increases the fuel presssure when the engine is at low vacume, is to counteract any fuel pressure drop in the fuel rail, which would result in poor atomization, and insufficiant flow.

 

Running 60psi should not be considered a viable long term solution to needing bigger injectors. The higher the pressure the fuel pump has to maintian, the harder it works and the more quickly they burn out. Since the fuel pump is conveniently in the fuel tank, which is obscured by the rear axle / suspension and exhaust, it's not a popular item to replace, especially frequently.

 

I agree. The use of an aftermarket fuel pump that has better flow, and more longevity, is an essential ingredient if max HP is the goal. A lot of the aftermarket pumps are inline and outside the tanks, as you would know. Also, the higher pressure/flow would keep the fuel rail's pressure even and avoid pres drops, and thus maintain an even flow/spray pattern. Do you know of any inline fuel pumps that will flow up to 40gph @ 100psi?. I have been looking around, and most don't flow that at that pressure.

 

theoretically 60psi could provide 22+ equivilent, althought not all injectors can flow at the higher rate, at least not evenly. They can probably handle 72.5, but they are designed for regular use at 43.5.

I flowed my 19's at 40, 45, 50, 55, and the higher it went, the more uneven it became.

If you wanted to go the higher pressure route, get them flowed at that pressure. A local fuel injector cleaning shop should not charge too much, heck they probably would find it interesting as they usually don't do much performance stuff.

Mark.