What's the difference between the STS and SLS engines?
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Northstar Engines and System Technical Discussion Discussion, What's the difference between the STS and SLS engines? in Cadillac Engine Technical Discussion; How did Cadillac get the extra 20hp out of the STS engine? Intake? Chip? Plus, who makes a good chip ...
  1. #1
    kjhansen's Avatar
    kjhansen is offline Cadillac Owners Fanatic
    Automobile(s): 1995 Cadillac SLS
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    What's the difference between the STS and SLS engines?

    How did Cadillac get the extra 20hp out of the STS engine? Intake? Chip? Plus, who makes a good chip without the speed limiter?
    Keith

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  3. #2
    JimD is offline Cadillac Owners Connoisseur
    Automobile(s): '98 STS (RIP @ 206,xxx), '04 DTS & the witch driver gone.
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    Re: What's the difference between the STS and SLS engines?

    Quote Originally Posted by kjhansen View Post
    How did Cadillac get the extra 20hp out of the STS engine?
    Camshaft.

  4. #3
    Highline Cady's Avatar
    Highline Cady is offline Cadillac Owners Fanatic
    Automobile(s): Nitrous03DHS,AJtune,Corsa,Volant,3.71s,Grille,tinted,stall'd
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    Re: What's the difference between the STS and SLS engines?

    Really it's the tune/PCM's. Only the intake cams are different on the newer N*'s. Personally I think the cams are better on the base models. The real noticeable difference comes from the different final drives, 3.11's on the base SLS, Deville, DHS, Eldo, vs. 3.71's on the STS, DTS, ETC. That's why I put those in my car, along with a bunch of other stuff.

    Oh, and for your 95, which is OBD1 the only company I know of is FAST chips, I think, it is a pain in the ass for Cadies but I think you can actually find aftermarket chips for 93-95 N*'s. Good luck, do a search this has been covered before.

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