[rachet ralph]

Hello All,

i have a 1983 cadillac coupe deville with a 4.1 in it now but located a 425cub. in. was thinking fabbing my own intake and use 3 throttle bodies and have a trip set up on it but now here my question, the cadillac injectors are low inpedance, can 4 more injectors be added to my ECU because i'd like to keep all the stock system with my mileage data center and on board ECU reading, the cadillac carries 7 p.s.i. for the fuel system was thinking placing a secound fuel pump along the frame rail to help with the extra fuel load i'm planning on using the center throttle body from a 368 and the outer throttle bodies from a 4.1 an one T.P.S. and 368 dist. or can i use the throttle body from a 454 chevy, but uses the I.A.C. not the I.S.M. that the 80's cadillac used, tring to keep it so passes state laws with emissions, keeping air pump and cats on the car fabbing my own headers with air tubes and and air tubes to feed air to the cats, so any one with any help and info be greatful!

[curtis73]

Nothing you describe will pass NY emissions. No mix 'n' match will do, you have to update to a complete and intact motor of the same or newer year. All of the emissions equipment must be in place, operational, and your car will then have to pass tailpipe emissions for the ENGINE'S year.

You also won't be able to fabricate any of this yourself. The intake and headers would be an instant fail. They must carry a CARB EO number to pass a visual inspection. You can have them certified, but it requires bringing a running model to CA and paying the CARB and EPA about $10,000 to test it PER item. If they fail, you're out $20,000. If they pass, you just paid $20,000 for an intake and headers.

If you're talking about adding injectors to an old 425 EFI system, forget it. They are the absolute in simplicity and they are analog. You would have to run them all through relays and the computer will flip its lid. If you're talking about adding them to the 4.1, chances are you'll fry it. Adding 4 low-impedance injectors to the system is basically cutting the already low load in a third.

You're talking some really custom stuff that even the 1983 system just will have no way of understanding.

I'm not saying it can't be done, but I am saying that your approach isn't really feasible.

[F&J]

Originally Posted by curtis73

Nothing you describe will pass NY emissions. No mix 'n' match will do, you have to update to a complete and intact motor of the same or newer year. All of the emissions equipment must be in place, operational, and your car will then have to pass tailpipe emissions for the ENGINE'S year.

You also won't be able to fabricate any of this yourself. The intake and headers would be an instant fail. They must carry a CARB EO number to pass a visual inspection. You can have them certified, but it requires bringing a running model to CA and paying the CARB and EPA about $10,000 to test it PER item. If they fail, you're out $20,000. If they pass, you just paid $20,000 for an intake and headers.

If you're talking about adding injectors to an old 425 EFI system, forget it. They are the absolute in simplicity and they are analog. You would have to run them all through relays and the computer will flip its lid. If you're talking about adding them to the 4.1, chances are you'll fry it. Adding 4 low-impedance injectors to the system is basically cutting the already low load in a third.

You're talking some really custom stuff that even the 1983 system just will have no way of understanding.

I'm not saying it can't be done, but I am saying that your approach isn't really feasible.

My state; Connecticut, has a 25 yr old exempt statute. NY?? maybe??

[matt167]

Originally Posted by curtis73

Nothing you describe will pass NY emissions. No mix 'n' match will do, you have to update to a complete and intact motor of the same or newer year. All of the emissions equipment must be in place, operational, and your car will then have to pass tailpipe emissions for the ENGINE'S year.

nope, unless it's in the Metro area, this does not apply.. '95 or older, no emissions testing ( '96-present, gets plugged in, but no sniffer ), but emissions equipment for that year car needs to be intact but he knows that.

[curtis73]

Originally Posted by matt167

nope, unless it's in the Metro area, this does not apply.. '95 or older, no emissions testing ( '96-present, gets plugged in, but no sniffer ), but emissions equipment for that year car needs to be intact but he knows that.

Oh... my mistake. I thought the whole state went to sniffer every two years.

Fact remains... both of the computers he's discussing won't even take the extra injectors, let alone a fabbed intake and headers.

Ralph... maybe an aftermarket computer like MegaSquirt?

[rachet ralph]

1996 an up only has emmissions testing anything 1995 and down only has a safey check

[rachet ralph]

i know a guy fab an intake using 2 holley 4 barrel injector bodies and used his stock 305 chevy ECU

[rachet ralph]

i want to use the ECU thats in the car from factory the 1983 ECU hell i'll go to pennsylvania get it on the road get it legal, they only look you have a cat an egr valve

[rachet ralph]

ok where do i fid a mega squirt ECU

[curtis73]

http://bgsoflex.com/megasquirt.html

i know a guy fab an intake using 2 holley 4 barrel injector bodies and used his stock 305 chevy ECU

Without knowing what year and what ECU, that doesn't really say much. If its the common "747" ECU, its quite possible with a lot of hacking, additional relays, and custom chip burning that he could have achieved what you say, but your 83 Caddy is a whole different story. It is a very primitive, unadaptable computer.

We can help you if you want, but being argumentative and unrealistic isn't the way to get help here.

[rachet ralph]

i said it's a 1983 cadillac coupe deville with a 4.1 using the 1983 ECU from the cadillac. i've taken and but a 425 in another cadillac and used the 1985 cadillac ECU and a 368 dist. and 368 intake and throttle body car ran fine, and i'm not being argurmentive, just asking questions, these are just thoughts on my engine if not i'll just put the 425 in with 368 intake and throttle body and i've fab intakes before for other cars but used carbs on them, and i've fab headers for many cars and never had any problem with inseptions, as long theres air tubes if car has them and a EGR valve and has the cats no sniffer pipe test here, and where my family lives in pennsyvania theres no emissions testing at all just look if theres cats an egr valve,

[rachet ralph]

i'm waiting on reply from megasquirt see what they can do for me!