87 GMC R1500 TBI injectors

[87 lowGMC]

I am currently doing the infamous 305 TBI to 350 TBI engine swap. My question is--can I replace my 305 injectors for 350 injectors and not change anything else on the TBI like (sensors)? I was looking on ebay for parts and found (5) 350 TBI inj. sensors. I am sure someone has completed this swap before....

 

[Swims350]

from what I heard yes, but I think you need a 350 chip or computer not sure.

 

[bucket]

You don't NEED the chip, but it is a good idea.

 

[Mike1]

hello

im new on this hey you got a 305 thats what i got in mines what can i do to the 305 with out going internal to get more power? just to kinda pep it up a lil i herd about a chip that just plugs in the brain but not for shore...but my truck is running BAD! i got to give it some new plugs becouse when i drive it acts like it dont wanna go and it skips so im not really to shore what to do

 

[HotRodPC]

Welcome to GMSB 87Low and Mike. As bucket says, you don't have to reprogram the chip, but it would be nice so the 305 will know how to handle the added fuel. You might run a bit rich if you don't, or maybe your advance can be tuned up a lil better. That's my understanding anyway.

 

[Jims86]

Welcome to the forums! you will need the 350 injectors, and a computer chip for the 350. The injector flow rates are set in the chip.
you will also need the 350 knock sensor.

 

[dhamp]

I'd get it running right before doing the swaps though. If it's running that bad, it could be something that's not related to the typical tune up parts and it would continue to rob your new performance as well.

 

[Jims86]

Welcome to the forums! you will need the 350 injectors, and a computer chip for the 350. The injector flow rates are set in the chip.
you will also need the 350 knock sensor.

Done the swap 23 times...cars and trucks. you will need the chip, injectors, and the knock sensor. All specific to the 350.

oh yes, i almost forgot.. you will need the knock module as well, it's AC Delco part#21647.