91formulaSS

In the near future I plan on swapping in a ZZ4. I have a 91 TBI 305 5 speed. I have done numerous searches, and learned a lot, but there is still a lot to learn. As I have never done an engine swap before, I would like to know everything that is in store for me, things I should keep in mind. I am going to go carbed, Holley DP most likely. What do I need to know as far as wiring? Can I get all my instrumentation to work properly? What about fuel? I can keep my fuel pump, right, I just need a 3 way AFPR? What about the evap canister, can I get rid of it? EGR? What emissions equipment should I keep? if any. I want to try to pass emissions. I already have Edelbrock TES headers w/ air. Just looking for some opinions, maybe some direction. I’d like to keep the surprises to a minimum.

KiLLJ0Y

do you have emissions testing in your area?

if so you can not go carbed because your car never came with it, and it was never offered on your car that year.

the only thing you can do, if you have to keep emissions, is a 350 swap with a TPI because our cars came with that option, and you will NOT need to go to a smog ref.

that being said, you can also swap an LT1 or LS1, retain all the emissions, take it to a smog ref for certification and be smog legal.

the set up you are wanted to do will not be smog legal if you have emissions testing.

OR

if you want a cheap 350, you can keep the TBI and just stick a 350 under it, no my choice but you can do it.

91formulaSS

Fuel Injection is out of the question. Too much time & money to get the desired performance. I don't have 8 grand to do an LS1 swap. I do have emissions test here, but they don't do a visual check. It is posible to get a carbed engine to pass an emissions test. A new engine and properly tuned new carb will do better on the emissions dyno. than my tired 182,000 mile TBI. It took me 5 times to pass last year. I'm not getting talked out of this one, I just want to know what I'm getting in to doing this swap.

KiLLJ0Y

you wont pass.. you just wont. go ahead try it, then when you fail you're going to kick yourself because you spent all that money.

TPI expensive?? are you crazy? a whole complete TPI system with harness is going to cost less than a new Holley Carb.

but if thats what you want, go for it... wont pass. you do realize that the EGR is what is crucial to passing emissions. the smog pump just pumps extra air into the cat system. the EGR regulates the amount of burned exhaust air going into the system. which in turn keeps your AIR/FUEL ratio where it needs to be. EGR is computer controlled.

ljnowell

I have seen people pass the sniffer, with a nicely built engine too. But it wasnt easy, nor pretty. In the end, 9 out of 10 wont stand a chance and end up with very expensive lawn ornaments. If you have emmissions, bite the bullet and get a good aftermarket injection system, keep the important emmissions stuff and have fun. If you cant afford that, simply put, in your area you cant afford it.

91formulaSS

And that TPI and stock ECM is going to work flawlessly on a crate motor too? I don't know how to tune FI, I don't know how to burn chips and I don't know anyone else who does. I don't have a garage to rebuild a motor, and I don't want a used setup.

Thanks for the lesson but I am already aware of the functions of all the polution control equipment on my car. I wasn't saying that because I have headers w/air I will pass emissions, I was just stating what I have on the car and asking if I can do without and still pass.

also I don't apreciate being flamed for asking questions. If you don't think it smart to put a carb on a car in a polution controlled state. that's fine. you can get your point across without the demeaning tones and put downs. It just makes you look like an *** hole.

ljnowell

And that is what you were told. Build it, fail it, and have a nice lawn ornament.

FireBreathin305

hey lj nowell why dont you just shut the hell up?

FireBreathin305

sorry man dont listen to this guy. he is obviously a fat ***** who has nothing better to do than surf the net and put down people who have questions to ask. get a life mr nowell! i think your swap would be a awesome idea. im looking into doing the same kinda thing but im waiting until i have the time and funds. but im just gonna pull the 305 and swap in a 350 since i looooove tpi and i would never wander away from it

ljnowell

I will give you the glory of one response. Dont call names here, its not allowed, and makes you look stupid.

Listen to this guy. He knows it all. Take his advice, build a car that wont pass emmissions, and is therefore no longer street legal. Trust us, this guy knows exactly what he is talking about, you can tell.

Enjoy your TPI!

What a lovely PM you sent me by the way,
Are you tired of the exhaust forum?

91formulaSS

emissions compliance would be nice, but that's not the issue here. I was asking what is involved in this swap, not what the consequences of it are. now, go stroke your ego somewhere else.

FireBreathin305

is that a picture of dimebag on your little thing? just wondering not to get off subject?

91formulaSS

RIP

FireBreathin305

oh yeah and i will give you the glory of shoving my tpi up ya azz. hey there champ does 1990transamtpi ring a bell? ***
look whos flamin ya now

FireBreathin305

RIP DIMEBAG

:rockon: :rockon: :rockon: :rockon: :rockon: :rockon: :rockon: :rockon: :rockon:

91formulaSS

too late

ljnowell

I am not stroking my ego. I am not the one that posted garbage in your thread, personally I am sorry to see your thread deteriorate to this point.

The swap is pretty plain and easy. You need an HEI style distributor. You can use a AFPR to regulate your fuel pressure down, mallory makes a good one that most people use. Make sure it has the return line, so you dont burn up the in tank pump. Most all of the wires can be removed from the passenger side harness, you can pretty well just unplug it and toss it. Your car is a 91 so I dont know about VATS and all of that crap. You may have problems with your gauges, etc. when it is all said and done.

No one cares that you created another user name. It doesnt bother any of us. Nothing like a teenager to come into the room and ruin the intellectual content.

FireBreathin305

as for the evap ive seen people get rid of it and just route a vent line behind the left tire

ljnowell

Then you can smell gas all the time. Dont half *** it like this, just hook it all up to the charcoal canister like everything is supposed to be. This doesnt cost any horsepower, its nothing that will help you performance wise. Keep it, its all to your advantage.

FireBreathin305

and the air does absolutely nothing but be a parasite on your engine. i would plug the holes on your header with a bolt and some pipe tape or weld them shut. or if you wanted get creative maybe use them as a provision for some kind of air/fuel meter or a exhaust temp sensor

FireBreathin305

i said ive SEEN not do it for certain, its up to him, see this is why i flame you just keep your smartass comments to yourself or learn to say them in a way as not to **** people off

91formulaSS

yeah, I want to get rid of the air system, cut and grind down the tubes off the headers then weld the holes and possibly get a non air cat if I planned on passing emissions.

ljnowell

Flame all you want, I dont care. I wasnt giving any smart *** comments. Apparently any time someone says something you dont like that makes it a "smart-*** comment" Get over yourself. You have a lot of growing up to do.

Removing the air and smog pump really wont save you much horsepower either, its more for aesthetics purposes. However, if emmisions compliance isnt required, you may as welll.

Something to remember though, is that when you remove the air pump, a lot of the times, people start having problems with cats plugging. You should be prepared to address that issue also.

Your last post beat me on the air pump,

pasky

My line is still sitting in my engine bay....



I even picked up the hose and smelled it and it doesn't even smell like gas. There must be very little that comes out.

ljnowell

It is very little, but sometimes it can really, really smell. I have had the displeasure of being in more than one car that you could smell it.

KiLLJ0Y

for 91formulaSS

look guy, you came to this board asking certain questions.. i answered, and you seem not to believe someone just because you dont like the answer that was given.

how was i demeaning? i cant help the way you interperet language over the internet.

you said you want to try and pass emissions, then you say in your last statement "if i planed on passing"
make up your mind.. and ask yourself this question:

will the state hold my registration if i dont pass an emissions test?

if the answer is NO, build whatever you feel like
if its YES, then a carb is not going to cut it.

as for the "lesson comment" i think you needed one, because if you knew or had any knowledge of emissions, you would not have asked if your car that is fuel injected, switched to a carb, can still pass emissions. umm duh..
cease asking questions that you "already" know the answer to then, that makes YOU look like the *** not me.

you asked, we answerd, you dont like the answer, tough luck guy, build it and fail.
and as to question "what is envolved", here ya go

Carb
ditch the computer, retrace all the wires through the body to see what you are needing, Temp sensor, fan switch, ect. the ones that are computer controlled. you will also need to fabricate or buy new fuel lines as the ones you have will be in the way. you will also need a non-computer controlled distributer, the old big cap style, a new coil, and about the guages.. the fuel will work, the battery will work, speedo, not sure about the tach but i think it will, temp sensor should be OK. You will need to rig new wiring to make the fan turn on as it was computer controlled. no sense it getting a catalytic converter because you'll destroy it pretty fast with no EGR, plus it will be a restriction.

theres what you are looking at.

for TPI, just plug, bolt on, you wont need a chip burned because a stock one with the stock ECM will work fine for now. you will need a new fuel pump though, the TBI is like a carb pump.

good luck, im done with this thread and will not longer view it so dont bother typing a response.

five7kid

iTrader: (14)

Man, spend a day at work, and look what happens while you're gone...

91formulaSS:
The advice you were given with regard to the ill-advised nature of going with non-EFI was completely in line with your original question. If I had been the first to respond, it would have been very much like what KiLLJ0Y said. I have seen people pass emissions with a TPI ZZ4, but not with a non-computer carb. As ljnowell said, some people who don't have a visual inspection have reported getting such a carb set up through emissions testing, but even then most of them failed the first time. EGR and A.I.R. increase you chances of passing sniffer.

FireBreathin305:
You are way out of line. Clean up your act, and now. Any repeat performance, consider yourself .