Ok i have been told all i have to change is my injectors from my 350 tbi and everything will bolt on and work on my 454 tbi i have just aquired is this true and if not shoot me in the right direction. Thanks Denny
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
350tbi to 454 tbi
- Thread starter dheavychevy38
- Start date
Incorrect.
Fuel maps alone are going to be different, along with timing. Not to mention, the 454 throttle body flows more air.
Assuming I understand your question right.
Fuel maps alone are going to be different, along with timing. Not to mention, the 454 throttle body flows more air.
Assuming I understand your question right.
Thunder
3/4 ton status
You will need 454 injectors and throttle body. 350 TB is too small for a 454. Need The PROM out of the donor 454 ECM assuming the donor 454 ECM is a 747 (Your 350 PROM wont work). I Think you have a 747 in your truck. I cant rember when GM changed ECMs. I think it was 92 but not sure. If you dont have the 454 PROM get the number off your ECM. You can buy them at a chevy dealer. You should also get a 454 CALPAC for the ECM also. You dont need it to make the engine run. But it controls the limp home mode and the 350 settings in your CALPAC wont work with a 454
Connectors for the IAC and possibly the TPS will be different from yours. You can buy adapter for the IAC, or solder & shrink wrap the 454 connectors on the 350 harness. The rest of the wireing/ linkage should connect and bolt up.
.
Connectors for the IAC and possibly the TPS will be different from yours. You can buy adapter for the IAC, or solder & shrink wrap the 454 connectors on the 350 harness. The rest of the wireing/ linkage should connect and bolt up.
.
Last edited:
