Can i take a tbi 350 injectors and replace mine with them?

 

they fit. No point in doing it though if you're running stock motor

 

You can stick them in there but the car will run like poo. The computer won't know what's going on.

 

IDK if the trucks are different, but my buddie put them in his 305 TBI truck (95??) with the dual stud cleaner, and it gave him additional power.

 

It shouldnt run any different because it will still be pushing fuel through at the normal rate shouldnt it? only if you wanted to run fuel at the pace of a 350 would you than require a tune.

 

They have different flow rates, check this page for info:

http://diy-efi.org/gmecm/component_i...injectors.html

 

Im still new injectors and tuning them, but would a tune be necissary if you bolted on 350 injectors? or is this something the computer is capable of recogtnizing and correctiong? i just did a 350 swap and was going to get the cop car injectors but i was told a better way to go would be to keep the stock ones i own, install an AFPR and tun the computer to push more pressure through the stock injectors, which would increase their flow rate?

 

Injector size increase is pretty close to CID increase. I would think the 350 injectors should be OK at former fuel pressure. 02 sensor feedback should correct A/F. I believe you may need a 350 knock sensor and I will guess a 350 ignition module? I dont believe a VAFPR will work with stock ECU. Did not for me anyway. You could crank up FP so the stock injectors flow more but then you may need an upgrade on fuel pump as well.

 

I have a walbro 190 going in so i should be set for some minor bumps in pressure, i have all the stuff for the swap i was just advised in another thread that instead of just getting bigger injectors(65lb/hr), i should bump up the pressure with a regulator, that way if i wanted to tune it more in the future, i would have the capability to do so, as opposed to having to buy bigger injectors etc. ill be burning my own chip so i dont see why an adjustable regulator would not work with the car

Also im guessing from what you said, In regards to the original question of the thread, that no you could simply not switch out 305 injectors for 350 injectors without tuning the computer to know that it has bigger injectors?

 

Quote: "Also im guessing from what you said, In regards to the original question of the thread, that no you could simply not switch out 305 injectors for 350 injectors without tuning the computer to know that it has bigger injectors?"

As far as tuning the .bin, yes that is always most desirable. B4 one does that you should buy(Moates) or construct a ALDL cable and datalog BLM data. The increase in size of engine and the injector size and fuel pressure are all indentified in a calculation for BASE Pulse Constant. That is placed in .bin. BUT the increase in CID is 13%. the increase in injector(55 to 65) is 18% so the ecu will deliver a bit too much fuel without you correcting in .bin. I would say choke, cold running under 160F coolant, pumpshot, and PE will be a bit rich. CL will be OK.

 

I look into this thanks a bunch guys, saved me time and pain i should just go and kick out 400$ for a tpi and the computer for a 305.

 

You will spend alot more $$$ than that to switch to tuned port and you will still have to deal with tuning to make power.

 

you can take them out of a pick up truck if you wanted.they'll work as long as their the same size.

 

hmmm i went and replaced my stock 305 injectors to cop car injectors and wen i try to crank the motor the injectors are like inconsistent instead of a steady flow of gas , they re like flikering and i have to keep the pedel to the floor so the car wont shut off.

and this is for a stock 350

sorry for the thread jaking

but i need help asap

 

i have used a lots of components from a 350 on a 305 tbi. like map sensor cap n spark plug wires and the car ran fine.i took my injectors from an old suburban the tbi was the same set up.i dont know much about the cop injectors except there probably going to use more fuel pressure from the pump then the stock 305 has to offer witch is only 9-13 psi.if the car ran fine before i woud switch back n make shure you didn't get any bad gas in there. n did you have any problems with it before chang?

 

I just switched my injectors on my 350, from my old 305 ones. I swapped the whole pod though, including the 350 regulator, now i dont know if regulators run at different rates, but my car runs fine, its a little bit stronger, but i also have the stock 305 chip, im still trying to find out if this setup is okay to run, or if i should change something, but you might have gotten a bad set of injectors, maybe your injectors wires are messed up. What kind of chip are you running in your car?