3800 series II or III swap into 79 deville? - Page 2
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 3800 series II or III swap into 79 deville? in Past Cadillac Vehicle Discussion; That's partially correct. You can use an engine from any car of the same year or newer, so long as ...
  1. #16
    ferrisworld is offline Cadillac Owners Fanatic
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    Re: 3800 series II or III swap into 79 deville?

    That's partially correct. You can use an engine from any car of the same year or newer, so long as you also swap all the emissions equipment and anything else that is related to that. I don't think it's that silly. It kind of is, but I'm somewhat liberal in that I like clean air and I'm not ashamed to admit that I may have been brainwashed into thinking that cars contribute to poor air quality. That's another reason for maybe wanting to do the 3800 since I think the series III qualifies as a SULEV. Correct me if I'm wrong.

  2. #17
    Stingroo's Avatar
    Stingroo is online now Wagon/Audio Enthusiast
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    Re: 3800 series II or III swap into 79 deville?

    I could be wrong, but having to swap over all the emissions/electrical equipment will make your swap significantly more difficult, I would imagine.

    Good luck to you.

  3. #18
    outsider is offline Cadillac Owners Connoisseur
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    Re: 3800 series II or III swap into 79 deville?

    I've only seen the 3800's on FWD cars...It would be pretty cool to see one swapped into a caddy

  4. #19
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    albymangled is offline Cadillac Owners Fanatic
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    Re: 3800 series II or III swap into 79 deville?

    It might be possible but why bother?

    If it's economy you're looking for there are other brands perhaps more suitable.

    One of the things that has always attracted me to Caddy is the big V8 engines...

  5. #20
    csbuckn is offline Cadillac Owners Master
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    Are you gonna build the motor or just swap one in? With the right cam, overdrive and rear gears, you could do good. I've always wanted to see a 3800 in a caddy. Plus you'd get a million miles on the motor.

  6. #21
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    jayoldschool is offline GM RWD V8 addict
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    Re: 3800 series II or III swap into 79 deville?

    Losing over 700 pounds will be a serious challenge. It won't be a Cadillac anymore...

  7. #22
    cadillac kevin's Avatar
    cadillac kevin is online now Cadillac Owners Master
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    Re: 3800 series II or III swap into 79 deville?

    I'm sure you could find spots to save weight- cut unnecessary metal out of interior metal part of doors, lose some of the other structural bracing thats not that necessary (like what's done in drag cars) but when you're done it will not feel like a cadillac.
    anyone know if series III 3800 parts will bolt onto the series II?
    to attempt this, you'd need a series II block from a camaro or firebird and the heads, intake, etc. off a series III (with forced induction to make decent power)
    and even then you'd be looking at a 260 hp/ 280 ft/lbs motor pushing a 5000 lbs car.
    its totally possible to put a 3800 in the car, but it won't be cheap or a direct bolt in by any means.

  8. #23
    Bro-Ham's Avatar
    Bro-Ham is offline Cadillac Owners Connoisseur
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    Re: 3800 series II or III swap into 79 deville?

    Quote Originally Posted by ferrisworld View Post
    ...I'm somewhat liberal in that I like clean air and I'm not ashamed to admit that I may have been brainwashed into thinking that cars contribute to poor air quality.
    I propose liberals only be allowed to walk or ride bikes for their transportation - that's the only solution to solve the clean air fantasy since if you buy into the mantra then you should be the one paying for it and setting the example. Imagine how clear and uncongested the roads would be without libs in cars - leaving more room on the road and resources for those of us who are producers to do our business swiftly and efficiently in our very large and comfortable vehicles.

    As for the idea of putting a 3800 V6 in a 79 Cad, it seems to me that for any nominal increase in fuel economy or lower emissions you will pay the price of your valuable time and hard earned money in attempting to make it happen. Unless there is some special provision in the government stimulus program that will pay you to do this swap, which wouldn't surprise me, and if that is the case I will be requesting a full refund from you once obama is rebuked in the next election.

    outsider and outsider like this.

  9. #24
    cadillac kevin's Avatar
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    Re: 3800 series II or III swap into 79 deville?

    Quote Originally Posted by Bro-Ham View Post
    I propose liberals only be allowed to walk or ride bikes for their transportation - that's the only solution to solve the clean air fantasy since if you buy into the mantra then you should be the one paying for it and setting the example. Imagine how clear and uncongested the roads would be without libs in cars - leaving more room on the road and resources for those of us who are producers to do our business swiftly and efficiently in our very large and comfortable vehicles.

    As for the idea of putting a 3800 V6 in a 79 Cad, it seems to me that for any nominal increase in fuel economy or lower emissions you will pay the price of your valuable time and hard earned money in attempting to make it happen. Unless there is some special provision in the government stimulus program that will pay you to do this swap, which wouldn't surprise me, and if that is the case I will be requesting a full refund from you once obama is rebuked in the next election.

    lame political rants are lame.

  10. #25
    ferrisworld is offline Cadillac Owners Fanatic
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    Re: 3800 series II or III swap into 79 deville?

    So I take it that the engine mounts from the 80s era 3.8 won't work with the series II from a camaro/firebird? From what I've seen people have swapped the FWD versions into the f-bodies without too much trouble aside from the throttle bodies being in the back etc. Series 3 has drive by wire and stuff it looks like, so a bit more work, but I like computers and electronics, so I might enjoy hooking that stuff up. From what I've read, I would save 200 lbs on the engine swap alone - 392 lbs for the 3800, about 600 for the 425.

  11. #26
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    LT1s are a dime a dozen these days and will probably get as good fuel economy as overloading a 3.8.

    Or, you can find a turbo 3.8 from '86-'87. It will tolerate 30 psi from the turbo (500 HP or so) without major machine work. Not emissions legal by a long shot. But would be a ton o fun.

  12. #27
    ferrisworld is offline Cadillac Owners Fanatic
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    Re: 3800 series II or III swap into 79 deville?

    Most people with the LT-1 in a Caprice or Fleetwood, at least from what I've seen manage maybe 24 on the highway.

    On another note, I've never weighed my car myself. The shipping weight for the Sedan Deville in 79 in 4212 lbs, and on one of my smog certificates the shop listed it at 4750. That doesn't seem right to me. I know the curb weight should be more, but I wouldn't think that much more.

  13. #28
    outsider is offline Cadillac Owners Connoisseur
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    Re: 3800 series II or III swap into 79 deville?

    yeah 24 is about what the LT1 does in the fleetwood...and that's on a good day.

  14. #29
    csbuckn is offline Cadillac Owners Master
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    Either way you look at it, a RWD caddy that gets 30mph is something I'd be interested in. You should do a 3.8 so we can see how many miles you can squeeze out of it.

  15. #30
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    Re: 3800 series II or III swap into 79 deville?

    Quote Originally Posted by cadillac kevin View Post
    lame political rants are lame.
    It's a shame to be humorless, most liberals are by the way.

    This idea of a 3800 in a big old Cad seems like pie in the sky. I have a 91 Olds 98 Regency Elite with the 3.8 and it's a decent engine for the car although no ball of fire. Plus, driving at highway speeds it delivers fuel economy on average of 27 mpg at 75 mph. This makes me doubt the premise of this idea of installing the same engine in a significantly heavier car and expecting high gas mileage.

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