: TBI 302 whats so bad about it?


2drnkecv
05-06-2004, 05:21 PM
Searched and found out that people don't like them. Why. Got a chance to get one dirt cheap, with about 50 grand on it that runs good. Going into an EB. What are all the downfalls? Sensors, wiring? I don't need to worry about smog. The donor's an 84 t-bird. Thanks in advance.

Jrod-13
05-06-2004, 05:48 PM
less power, less mileage, horseshit design, and in my expiriances, a nightmare to wire..

Much better off with a SEFI setup, cheap and easy.. all of 7 wires you need to hook up.

CJ5-Man
05-06-2004, 05:51 PM
how could it be any harder to wire up than an sefi setup?

I've done a 5.0 sefi swap and a GM TBI and TPI swap, the TBI was the easiest. I can't imagine ford used many more sensors than GM did, and I think the ford TB's use a standard 2 barrel carb bolt pattern.

if you can get it free, go for it.

2drnkecv
05-06-2004, 06:17 PM
Currently running a cammed 302 with stock 2 barrel. Don't mean to sound dumb, but can't most of the smog and sensors be ditched cause I don't have to worry about smog? Wouldn't that simplify wiring?

ImNotRight
05-06-2004, 07:06 PM
Well, compared to the SEFI 302's, they have CRAP for heads, lower compression, non-roller cam.. Hideous stock cams..

Oh yea, stock power figures on that are probably shy of 175hp.. :shaking:

So, simply by going SEFI (post 87) you got a LOT more going for you ..

2drnkecv
05-06-2004, 07:27 PM
what about putting the TBI stuff on my motor? worth it for the tipability. Thanks again.

Jrod-13
05-06-2004, 09:07 PM
no, personaly I wouldn't try it..

the best part about fords TBi is that it shares the same intake as a motorcraft 2bbl, so you can easily replace it..

as for the wiring, you have to remember, fords TBI, just like the VV setups, were just a bandaid for passing smog tests, nothing more, so picture your average carbed msog motor, and double that, and thats what the typical ford TBI setup resembles

CJ5-Man
05-06-2004, 09:57 PM
so far I haven't seen a valid argument as to why it doesn't work

If you can find a wiring diagram it can be swapped. I think the reason everyone says it sucks, is because no one has swapped one yet and it is a case of fear of the unknown.

Whatever heads or block it came with isn't part of the question, most trucks came with shitty heads and non roller blocks and their efi works pretty good. EFI of any kind is better than any carb, and while SEFI is great, its not the only solution to fuel injection on a ford. The TBI setups I've seen in the junkyard don't look any more complicated than other manufacturers TBI. The reason it might have more vacuum lines is because the emissions stuff is still vacuum controlled and can be done away with easily.

I say go for it, and let us know how it turns out.

Clodhopper
05-06-2004, 10:10 PM
Much better off with a SEFI setup, cheap and easy.. all of 7 wires you need to hook up.

What vehicles/years are good donors for 5.0 SEFI equipment?

Jrod-13
05-06-2004, 10:33 PM
87-88(87 only cali) for speed density
89(88 cali)-93 for mass air flow.

both from mustangs.

Linconl MarkVII's also have it, but they are all speed density, and have other shit worked into the wiring harness, like the cruise for example.

bobbywalter
05-07-2004, 07:16 AM
it swaps the same as sefi. but the computer is gay. i had an 84 t bird. it wont keep up with a 250 hp build with the stock stuff.

the 84 bird tbi is closer to 140 hp.

2drnkecv
05-07-2004, 09:41 AM
Good shit guy's, but I still don't understand if there wikk be a compatibility issue? I'm going to guess from I believe it was J-rod saying it take the same intake as a motocraft, it should be a bolt on. (I can wire just about anything) just wanted to do some research her to figure out if it's worth it.

Jrod-13
05-07-2004, 12:53 PM
no, there shouldn't be any compatibility issues.. and yes, the intakes are the same. A few years back My buddy had 84' MarkVII with that setup on it, started running worse and worse... after fighting with a for a few days, we tossed on a 2bbl and called it good, problem solved. By all means, put the thing on, if it works good for you, then awsome, if it doesn't work out, atleast your not out much money.

Gordon
05-08-2004, 10:42 PM
I have this on my EB. It got a bad rap from the version that was controlled by the EECIII computer. That version has a magnetic pick up on the harmonic ballancer. The EECIV version is reliable and an easy swap same splices as with the port injected motors. I picked it over a "cooler" setup because my bronco was my only vehicle then so I would work on the swap at night and then stick the carb back on and get it driveable so I could drive to work and school the next day. Man I wish I was that motivated now.

As far as power goes I agree with the comments. You can't make power with that throttle body it doesn't flow enough air for more than 200 HP. but that was OK for my bronco then. Now I want a lot more power.

Stoked
05-08-2004, 11:43 PM
it might just be a handfull of us, but i also agree that for the same amount of work you can have somthing that will run much better. the EFI truck intakes seem to be cheap enough, and if they are not, talk to me, i still have all my old 302 parts leftover from my 351w swap.

2drnkecv
05-09-2004, 03:10 PM
thanks again guys, you got me convinced. not worth it. The guy mentioned something about the harmonic ballancer so I guessing it's the shitty computer.

Paul Gagnon
05-16-2004, 05:41 PM
In my opinion one of the main reasons not to use Ford TBI is because there were so few of them made in comparison to SEFI that it would probably be harder to find a good used one.