Turbo or super for a 1989 fleetwood
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HT4100 4.1, 4.5, 4.9 Discussion, Turbo or super for a 1989 fleetwood in Cadillac Engine Technical Discussion; I've been looking in to making my car faster but can't really decide on which one? Or is there any ...
  1. #1
    bosque is offline Cadillac Owners Member
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    I've been looking in to making my car faster but can't really decide on which one? Or is there any other way to make the engine fast with out any of those.

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  3. #2
    drewsdeville is offline Cadillac Owners Master
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    Re: Turbo or super for a 1989 fleetwood

    No, you don't have many options outside of forced induction. A number of members at fiero.nl have turbocharged the 4.9 to 300hp or so. See what you can find over there.

  4. #3
    quins90lac's Avatar
    quins90lac is offline Cadillac Owners Enthusiast
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    Re: Turbo or super for a 1989 fleetwood

    89 its a 4.5 and you can make all the power you want but the trany wont last long

  5. #4
    92 4.9 Deville is offline Cadillac Owners Member
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    Re: Turbo or super for a 1989 fleetwood

    There is a Fiero guy adapting an Eaton M90 onto a 4.9 as well that I have been watching for updates to see how it works out. There is a company doing regrind cams for these engines so that could help a bit. I have read that the Allante intake is supposed to be an improvement but not sure how much.
    You could try to get a free flowing exhaust, wont be huge gains but should help a bit.

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