What can I do to my 305 TBI engine?
What can I do to my 305 TBI engine?
Easiest fix is to replace it with a 3″ tall 14″ diameter open element filter with a flat base. You can drill a hole in the base to put your IAT sensor in. Also toss the choke collar that is between the TBI and the air cleaner assembly. Good for around 5hp on a 305 car and again mandatory for any decent engine upgrade.
How much air flow does a 305 TBI have?
The TBI unit. The stock 305 and 350 TBI unit has 2 (1 11/16″) bores which flow 450 cfm of air. Up to 230hp engines that air flow is fine. you can do the ultimate TBI mods to the stock 42mm TBI unit and get that air flow up to 500cfm without increasing that bore diameter which is plenty for any 305 engine that you can run with TBI. 7. Injectors.
What should the fuel pressure be on a 350 TBI?
From 370-440hp you need to bump the fuel pressure up on the 454 injectors to the 15-18psi to increase their flow rate to 100lb/hr.
What’s the casting number on a TBI 305 head?
Those are the last 3 digits of the casting number on top of that head under the valve cover. These heads flow as well as pretty much any other 305 compatible head out there and respond very well to some porting and good for nearly 30hp over the TBI 305 heads.
Easiest fix is to replace it with a 3″ tall 14″ diameter open element filter with a flat base. You can drill a hole in the base to put your IAT sensor in. Also toss the choke collar that is between the TBI and the air cleaner assembly. Good for around 5hp on a 305 car and again mandatory for any decent engine upgrade.
The TBI unit. The stock 305 and 350 TBI unit has 2 (1 11/16″) bores which flow 450 cfm of air. Up to 230hp engines that air flow is fine. you can do the ultimate TBI mods to the stock 42mm TBI unit and get that air flow up to 500cfm without increasing that bore diameter which is plenty for any 305 engine that you can run with TBI. 7. Injectors.
Those are the last 3 digits of the casting number on top of that head under the valve cover. These heads flow as well as pretty much any other 305 compatible head out there and respond very well to some porting and good for nearly 30hp over the TBI 305 heads.
What do you need to convert a TBI to a carburetor?
The most basic things you’ll need to convert from TBI to a carburetor is a carb and a matching manifold. You could try to track down a used stock manifold, but aftermarket aluminum manifolds like the Performer RPM make more power, are lighter and will only run you about $60.
