I'm switching to carb. I have finally gave up on my TBI setup since I did my mods. I cant even to get it to run like it did when it was stock. I just dont want to spend the time and money on tuning the prom on this thing. I can however tune a carb pretty good cuz thats what I am used to. Its not my daily driver and we dont have the smog police here yet so I am going to try it and see if ther is any improvement in my timeslips.

 

That's too bad. I would just take the time and learn how to burn your own chips. In the end I think you will be more happy with tbi than carb, but if you feel otherwise thats cool. Good luck.

 

What you can do, since you're not real happy with TBI right now is switch to carb, then after you study more about TBI and learn more about it, perhaps try it again.

That's basically what I was planning on doing. Then my car got hurt.

Work with what you know until you feel the need to tackle something you don't know.

 

well if you really think about the TBI its not really as hard you might think, i say that because i've worked on other systems that are 10x more complicated then TBI, usually its the simple things we overlook and we make it extremely hard to fix tearing into something else thereby making it worse. If you look at the computer its pretty simple to understand and burning your own chips isnt any harder. normaly open, normaly closed circuts, IP/OP, etc....
heres what happened to me, today! i went out to install top cover but i later learned that reason why my injectors where leaky is the O-rings where cracked, injectors where burnt the screens were melted, and now they need rebuilding) ive spent the last month waiting to get parts for this thing, but more probs arise. [a carb will probably net you more power though] ive thought of it but the more i look at this TBI clunker the more i say S*** i understand that now!
EXACTLY

www.tbichips.com chip from this guy cost 30 bux? im there
http://www.fl-thirdgen.org/forum3/viewtopic.php?p=18617

 

Yea I may put TBI back on it later but I doubt it. I'm still going to leave my wires and stuff in case I do. Im kind of a puter tard so it really sounds like burning proms is over my head . Hell, I could'nt even get the win/aldl cable to work after building it 3 times. I guess its just not meant to be.

 

not to rag (no pun intended) on your setup but most of the stuff there really arnt parts geared toward making power. First, the LG4 intake is ok, if you have a 780 cfm quadra jet. That intake, from what i hear, really has a small internal volume. Not what you want with a small bore tbi. You want a good aftermarket intake with a large volume to buffer out the intake pulses so the tbi doesnt get totally overwhelmed. Secondly, the LT1 cam isnt exacly high performance. Its a relativly mild, conservative cam with low durations and efi friendly LSA. Not bad, but you need good parts to go along with it if you want to make reasonable power through the low and mid range of your engine. Secondly, those 416's are only average in stock form. Better then the boat ankors you replaced them with but still not a great head. They really need to be ported, polished, and enlarged to give results. If you still have the stock tbi, i highly recommend replacing it with a new holely unit. I got a 670 cfm one and it made all the difference in the world. Before that, my engine was a real dog. Its not a rocket, but its much better.The larger bores and the new delphi injectors really improved perfromance all around. As far as fuel goes, the little things really make huge difference. Lastly, an old 305 really doesnt help matters any if its starting to get sloppy inside. If your getting blowby and oil consumption, its time to point your car toward a junkyard and get a 350 core. All of these things really dont help much. In essence, you have an L69. Not a bad engine, 190 HP, but still not what you want in a 3500 lb lead sled. I wouldnt lay all the blame on the tbi. Even w/o prom burning, it should do ok with those parts since their not too far off from stock. Switching over to carb may not make your car much faster, in fact, it may not change things much at all depending on how your engine is.

 

lol, the server didnt even register that i posted in here yet... thats wierd...

ok, works now...

 

My 305 runs great and barely used any oil w/ the old heads. I dont thimk its time for a new engine just yet. Even though my mods arent that extreme I should'nt have lost so much off of my timeslips. I've played around w/ this setup until I'm tired of it. I know a carb is inferior but I'm going to give it a try and if it does'nt show any difference I'll switch back.

 

glad to see you're making the switch, but what took so long

 

hey I'm new to the whole thing so right now tbi is what I know the most about (not saying much) so when I try moving to a stealth ram I might try falling back on tbi and learning what I can about dfi, but I will get that thing figured out.

 

how much did you loose (gain)? What are you running now?

 

I ran a 15.7 w/ just open element and a glasspack, w/ stock timing and FP. After mods the best I could get was a 15.9. I messed w/ timing and fuel pressure several times and that was the best result.

 

I hear ya...my days on this section of the board are numbered IF I get an LT1 I bid on to swap into the RS.

 

Hey raggedout are you still running the stock y-pipe and intermedate pipe. This could be holding you way back by not letting you see the benifits of your mods. Even a carb wouldn't make it run any better.

Steve

 

Report the trap speeds, also. At least we can guage HP from that. ET comes from many things. Torque is only one way to effect the ET (traction comes to mind).

 

hey I know the idea sux but, if you have a stock chip you could either get a chip burned or put all of your emissions crap back on. These engines are tuned with all that bs on there, so when you take it off it's like putting your engine out of tune. Just an idea

 

i second that. if your running any part of the crap stock exaust, then your gonna be slow no matter how big a carb you slap on it. The stock exuast would actually make you slower with a better cam since the power band would shift but you cant make more power at a higher rpm becuause the stock exaust components are capping the maximum ammount of power you can make, hence less average power output for your engine. If you do have any stock exaust components, dump them FIRST before you consider switching over to carb. Youll need new exaust stuff anyway so youll need to invest in that before anything else.