Installing Injectors

[1998GSXR]

Can I put in 780cc injectors without putting in a fuel pump or fpr?

Will it screw anything up?

 

[gsx951]

Can I put in 780cc injectors without putting in a fuel pump or fpr?

Will it screw anything up?

You are going to need some type of fuel control SAFC,DSMLink,Chip, ect.

 

[funniegus]

780cc are overkill for youre setup , you cant throw parts at it with out the proper supporting mods.

 

[CHnKTSi]

hmmm... 780...
trying to reach 600+ hp?
well, you will need pump to pump enough gas to shoot that much gas.
also, better fuel rail, pressure regulator, and fuel management (safc, emanage, etc).
but... why 780?
i heard of people going up to 650cc and running great but 780 is... wow.

 

[2gGSX]

hmmm... 780...
trying to reach 600+ hp?
well, you will need pump to pump enough gas to shoot that much gas.
also, better fuel rail, pressure regulator, and fuel management (safc, emanage, etc).
but... why 780?
i heard of people going up to 650cc and running great but 780 is... wow.

780, why not if he's planning to move onto a big turbo and wants to run it on pump gas? The stock fuel rail will be fine unless you plan on making some really ridiculous power.

Can I put in 780cc injectors without putting in a fuel pump or fpr?

Will it screw anything up?

You will definitely need a bigger fuel pump. According to Jewer's chart, 780cc injectors will require a max flow of 187.2 lph, which is definitely beyond the walbro 190. A walbro 255hp is what I would recommend you get; it flows 233 lph at 58 psi fuel pressure (15 lbs of boost) and 210 lph at 73 psi fuel pressure (30 lbs of boost), so either way you will have enough headroom for a good sized turbo. Whether you rewire it or not is up to you.

With this, you will definitely need an AFPR capable of lowering fuel pressure, as this pump will undoubtedly overrun the stock FPR.

You didn't ask, but like everyone else has recommended you will need some sort of tuning for those injectors. 780cc injectors are beyond what the SAFC can handle, without a lot of problems. Thus, you will most likely have to look toward DSMlink or some sort of chip, either of which will provide enough compensation for those injectors (deadtime and pulling fuel). For either of those options you will need to convert to a 95 EPROM ECU and have that socketed.

My advice would be to go with the DSMlink. Basically, the arguments for it is that it provides full logging capabilities, has the support in the form of a forum, and after all is said and done is worth every penny.