okay, i have a 92 rs with the stock 305 (TBI)..

i'm about to put in a 350 bored .30 with 305 heads. but i'm concerned with it not getting enough fuel. but i just cant change it to carb without a new computer chip (i think) . um, what can i do to the stock fuel injection system to make it dump more fuel?

 

carb wouldn't have a chip (right?) you would just buy a carb to flow the amount you want...

 

Use bigger injectors from a 350 Caprice or 350 truck. The 305 TBI injectors are 55lbs/hr and the 350's are 61lbs/hr. Then get the stock chip for an 89-91 police car Caprice, its code is ANLU.

 

That or get a Holley 670cfm throttlebody and a chip to match (the Caprice chip should run it fine).

If you change to carb you'll have to change a lot of other stuff too. You'll need a non-computer distributor, a carb intake and the carb itself, you'll have to rewire the fuel pump because the computer will no longer turn it on, and you'll have to do something about the speedo because thats run through the ECM too. Also you'll have to regulate the fuel pressure down to 5-6psi. There are probably other changes that I've forgotten.

 

someone explain this to me? how does a carb work? it's not the same as a computer controlled EFI system? a carb has a chip? whats going on/!

 

A carb adds fuel to the air using mechanical means...pressure differentials and rod and jet sizing and such thing. Fuel injection does it all electronically via sensors, injectors, and a computer to control it all. Carbs do not have chips because they do not have computers.


There is an exception though: The CC Quadrajet. For a while GM was using carbs that were partially computer controlled (hence the CC). It was the system that led up to fuel injection, and its a carb with a computer. I personally don't like them but there are people who swear they're the best thing thats happened to cars since the wheel.


Hope that helped.

 

305's are 55? i thought it was alot lower than that....what's a 350?

i thought it was 19-24 range...

 

where can i get the 89-91 police car Caprice chip?

 

Jeff they are talking TBI.

 

doh...........

 

You can get the chip out of a junkyard Caprice with the hi-po package or from GM. They'll probably have to order it though.