HF 2.8 turbo & HF 3.6L similarities
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V6: 3.0, 3.2 LA3, 3.6 LY7, 3.6 DI LLT Discussion, HF 2.8 turbo & HF 3.6L similarities in Cadillac Engine Technical Discussion; Just how similar are the HF2.8L turbo & HF 3.6L? Could you in theory take the HF 3.6L block and ...
  1. #1
    Starfire88 is offline Cadillac Owners Member
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    HF 2.8 turbo & HF 3.6L similarities

    Just how similar are the HF2.8L turbo & HF 3.6L? Could you in theory take the HF 3.6L block and mount the HF 2.8L head, turbo gear and electronics on it for example?

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    Rodya234's Avatar
    Rodya234 is offline Cadillac Owners Connoisseur
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    Re: HF 2.8 turbo & HF 3.6L similarities

    I don't think anyone would know, considering that the 2.8L isn't used in any production car yet. At least not any Cadillacs.

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    concorso is offline Cadillac Owners Master
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    Re: HF 2.8 turbo & HF 3.6L similarities

    Not true. Saab, Opel and Cadillac have been using the 2.8L Turbo for 2 or 3 years now.

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    concorso is offline Cadillac Owners Master
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    Re: HF 2.8 turbo & HF 3.6L similarities

    Quote Originally Posted by Starfire88 View Post
    Just how similar are the HF2.8L turbo & HF 3.6L? Could you in theory take the HF 3.6L block and mount the HF 2.8L head, turbo gear and electronics on it for example?
    I would think so. You might run into some issues since its only been mounted on a fwd configuration so far. The n/a 2.8L has been in the CTS tho...

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    Starfire88 is offline Cadillac Owners Member
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    Re: HF 2.8 turbo & HF 3.6L similarities

    The following cars use, or will use, the 2.8 turbo (LP9)
    2007 Cadillac BLS ..... Epsilon platform (FF layout)
    2010 Cadillac SRX ..... Sigma platform (FR Layout)
    2006 Opel Vectra ...... Epsilon platform (FR layout)
    2006 Opel Signum ..... Epsilon platform
    2009 Opel Insignia ..... Epsilon platform
    2006 Saab 9-3 ..... Epsilon platform (FF layout)

    the other HF engines are

    LP1 2.8L, naturally-aspirated engine used in the '05 CTS. Output is 210 HP@6500rpm/194 lb·ft@3300 rpm

    LP9 2.8L, turbo-charged engine used in vechiles listed above. Power Output are 252hp@5500 rpm/258 lb·ft@1800rpm, 227 hp or 276 hp (will lookup which vehicles have which later)

    LF1 3.0L, naturally-aspirated engine is debuting in '10 models on Epsilon, Sigma & Theta. power output is expected to be 255 hp@???? rpm/214 ft·lbf@????rpm

    LY7 3.6L, naturally-aspirated engine used in lots of vehicles. Platforms include, W-body, Sigma, Epsilon, Zeta & Lambda. OUtputs vary depending on platform (w-body 240 hp@6000 rpm/225lb·ft@ 2000 rpm , Zeta 262hp/251lb·ft, Lambda 275 hp/251 lb·ft, Sigma 255 hp@6200rpm/252 lb·ft@3100 rpm, Epsilon 252hp@6300rpm/251 lb-ft@3200 rpm, Epsilon II is rumored to have 280hp/261lb·ft)

    LLT 3.6L, naturally-aspirated engine used in Sigma, upcoming Lambda, Epsilon II & Zeta platforms. This is the Direct inject version. Power output is platform dependant (Zeta & Sigma 302 hp@6300 rpm/272 lb·ft@5200 rpm, Lambda 286Hp@6300rpm/255 lb·f@ 3400rpm, Epsilon II 280hp@???? Rpm/261lb·f@???? rpm)

    LCS 3.6L, naturally-aspirated engine used in the Saturn Veu Hybrid/Theta platform. It is direct inject and is a 2-mode hybrid. Power Output 262 hp@6100 rpm/250 lb·ft@4800 rpm

    As a note both Holden (227 hp@6600 rpm/219 lb·ft@3200 rpm) & Alfa Romeo (260 hp@6200 rpm/237 ft·lbf)build a 3.2L version of the engine too


    So once the 2010 modeles get here the question will be more easily answered for the CTS anyways. The chart above is very interesting for the Chevy Malibu, Pontiac G6, Saturn Aura, Fiat Croma, and the up coming 2010 Buick LaCrosse and Regal

    Now to wait for the '10 SRX to reach boneyards to begin playing

    Does any one have a picture of the engine bay for the current style CTS & Malibu. Or better yet the exploded view that the dealers use to see what part goes where. I'm looking to get measurement for this

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    concorso is offline Cadillac Owners Master
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    Re: HF 2.8 turbo & HF 3.6L similarities

    Quote Originally Posted by Starfire88 View Post
    As a note both Holden (227 hp@6600 rpm/219 lb·ft@3200 rpm) & Alfa Romeo (260 hp@6200 rpm/237 ft·lbf)build a 3.2L version of the engine too
    I would hope Holden have a version of the engine, considering they helped design it. They also build most of the engines for the non-North American market.

    Youre missing one application, too. The Saab Turbo X used the 2.8L Turbo, but it bumped the hp to 280 and the tq to 300+

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    Starfire88 is offline Cadillac Owners Member
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    Re: HF 2.8 turbo & HF 3.6L similarities

    only reason i didnt list the Saab Turbo X is i couldnt find the RPO code for that variant of the engine or the year

    I have a feeling the turbo 2.8L will have considerable hp/tq differences depending on the yaear and model they are in

  9. #8
    concorso is offline Cadillac Owners Master
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    Re: HF 2.8 turbo & HF 3.6L similarities

    Quote Originally Posted by Starfire88 View Post
    only reason i didnt list the Saab Turbo X is i couldnt find the RPO code for that variant of the engine or the year

    I have a feeling the turbo 2.8L will have considerable hp/tq differences depending on the yaear and model they are in
    I was wrong. I thought there were changes to the engine versus the lower powered LP9. But from what Ive been told, the Turbo X just has the boost upped.

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    Starfire88 is offline Cadillac Owners Member
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    Re: HF 2.8 turbo & HF 3.6L similarities

    Thats fine, if all all the Saab Turbo X happens to be is an LP9 with more most or a bigger turbo its worth knowing for junk yard diving.

    Just curious where had you heard it has more boost and did they/it tell you how it got more boost so i can add it to the list and be accurate

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