I have a L03 TBI 305....i plan on putting in long tube headers...i also plan on using a LT1 cam... as well as many of the free TBI mods...like the open element air cleaner.and i was wondering what kind of power i would be making? and i was wondering which trucks...if any...have bigger TB's that would work with my car....if you guys could help that would be great

 

I'd say you'll be pushing about 220 hp. You really gotta ditch the swirl port heads though. As I'm sure you'll soon find out As for the throttle bodies, can't help ya.

 

For a bigger tbi, look in late 80's, early 90's HD trucks that came with 454's. The injectors will be bigger then what youll need, though, probably want to step down to around 65 pph.

 

Should go to a three wire O2 sensor with the headers

 

plan on getting a fan temp switch when doing the headers, I think everybody broke it off. I did, then forgot to drian the anti-freeze out of the block

 

Woah Woah lets slow down here a bit guys. You need to first make sure that you car is in good running condition before you mod. These cars tend to get neglected over the years and a good tune up can do wonders. Before you add a cam you need to make sure that you have a full exhaust (I would look at the exhaust page to find a better route than longtubes for a 305TBI), and you also have to make sure that you have enough fuel. You are going to have to be rady to burn a nrew chip to make a cam swap run to its full potential. Your best bet is to search for 305 TBI mods and go from there. As you build up your car and prepare it for heads and cam you will learn the 'ins' and 'outs' of these cars. As simple as TBI may seem, there is a whole lot to understand before you throw parts at it.

 

Welcome to the boards!! Just like Shifty said (been saying that alot lately) you can do a SEARCH here in the TBI forum and answer just about any question you could have on freshly upgrading a stock 305. Making power isn't as easy as we'd all like it to be takes some work and a lil' sacrifice, but if you do it right it'll all work out in the end!

Bruce (90RS305)