4.5 V8TT engine
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Cadillac ATS-V Series Forum Discussion, 4.5 V8TT engine in Cadillac V-Series Forums; Today on leftlanenews.com there is an article on a new Cad concept with a 4.5 V8TT engine producing 500/500 hp/torque. ...
  1. #1
    mikesul is offline Cadillac Owners Enthusiast
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    4.5 V8TT engine

    Today on leftlanenews.com there is an article on a new Cad concept with a 4.5 V8TT engine producing 500/500 hp/torque. Here is a perfect motor for the ATS-V.
    Hoosier Daddy likes this.

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    mberisha is offline Cadillac Owners Connoisseur
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    Re: 4.5 V8TT engine

    Yes please!

  4. #3
    JFJr's Avatar
    JFJr is offline Cadillac Owners Connoisseur
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    Yes, babies!! Now if we could have the TR6070, too....

    Jud
    Jud

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    bruff1977 is offline Cadillac Owners Fanatic
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    I was disappointed... IN THE PRESS RELEASE. Nothing technical! Cadillac could've explained what chassis was used, how many speeds the transmission is... Or even the paint process!! (That blue... Perfect.)

    But you're right. Just based on numbers, that TTV8 would be a great fit in the ATS-V. I'll take those hood vents also.

  6. #5
    roadpie4u is offline Cadillac Owners Fanatic
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    Re: 4.5 V8TT engine

    Why go through the effort of creating a unique road engine (4.5L) when you could just, you know, make a boosted version of the LT1 and be done with it?

    Just, you know, sayin. If GM was going to boost a V8 from the factory, they'll save money and use the larger volume 6.2L as a starting point...

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    JFJr's Avatar
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    Quote Originally Posted by roadpie4u
    Why go through the effort of creating a unique road engine (4.5L) when you could just, you know, make a boosted version of the LT1 and be done with it?

    Just, you know, sayin. If GM was going to boost a V8 from the factory, they'll save money and use the larger volume 6.2L as a starting point...
    Yes, well we don't want to usurp the omniscient GM marketing department, they know best. Ha haa!

    Jud
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    Re: 4.5 V8TT engine

    So, no news about no. of valves per cylinder, is it DOHC? I'm assuming it's DI, VVT, and has active fuel managment (i.e. DOD). Is the design like the 3.6TT with the integrated turbos?

    Man, I hate when they do this!

    But, the thought of a 4.5L twin turbo V8? Well, that sounds like heaven.
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    mikesul is offline Cadillac Owners Enthusiast
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    Re: 4.5 V8TT engine

    Possibly it's a new engine in development to be used throughout GM. New CAFE rules mean eventually all engines will get smaller. I would like to know engine dimensions, weight, etc. to see if it's a smaller form factor V8, not just another in the 4.8, 5.3, 6.2 (etc) size block.

  10. #9
    roadpie4u is offline Cadillac Owners Fanatic
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    Re: 4.5 V8TT engine

    Quote Originally Posted by mikesul View Post
    Possibly it's a new engine in development to be used throughout GM. New CAFE rules mean eventually all engines will get smaller. I would like to know engine dimensions, weight, etc. to see if it's a smaller form factor V8, not just another in the 4.8, 5.3, 6.2 (etc) size block.
    It's marketing nonsense. GM has yet to release the genV on large scale, and the next generation of v8 engines from GM is a *long* way off.

    The problem is for a given displacement, having more cylinders means more friction and pumping losses. A 4L v8 will nearly always have more losses than a 4L v6. Higher power, of course, but less efficiency. If reducing displacement was entirely a function of efficiency, the 4.5L makes no sense - especially when the coming TTV6 already is capable of this power output with a liter less displacement... But a small TTV8 sounds good for marketing.

    The first word of GM doing a major V8 change was for the prototype Direct Injected Escalade - in middle 2007. Now, 6 years later, the first GenV V8 is ...almost here.

    The only other potential displacement is the often rumored 5.5L, but realistically that's just an execution for racing.

    Back to that prototype Escalade - the engineer quoted said the engine was capable of "we'll north of 450hp" from the DI 6.2 OHC - and the final product in the C7 Corvette with the TR6070 it's getting a 30mpg window sticker.

  11. #10
    ben.gators is online now Cadillac Owners Connoisseur
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    Re: 4.5 V8TT engine

    I LOVE V-8 engines, but I am not sure about how engineers will be able to balance ATS-V with that presumably heavy, V-8 engine? Anyone knows anything about the weight of that engine?

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    Re: 4.5 V8TT engine

    Quote Originally Posted by roadpie4u View Post
    ... the 4.5L makes no sense ...
    What would you have? ... a V6 with that displacement?
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    roadpie4u is offline Cadillac Owners Fanatic
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    Re: 4.5 V8TT engine

    Quote Originally Posted by rand49er View Post
    What would you have? ... a V6 with that displacement?
    I'd say...

    If you want 300hp, you'll get a 2Li4T
    If you want 350hp, you'll get a 3.6Lv6
    If you want 420hp, you'll get a 3.6Lv6TT
    If you want 450hp, you'll get a 6.2Lv8
    If you want 550hp, you'll get a 6.2Lv8SC
    If you want 650hp, you'll get a 6.2Lv8TT

    Or thereabouts. A 4.5L v8 is an odd displacement and makes NO sense, as I said. Why design a unique block, crank, heads, intake..... Just for a low low volume production engine? GM should put the budget elsewhere, where it can make a difference instead of silly powertrain waste.
    rand49er likes this.

  14. #13
    JimmyH is offline Cadillac Owners 10000+ Posts
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    Re: 4.5 V8TT engine

    I am going with the V6 haters. They should put the LT1 in the ATS-V.
    RICKY V likes this.

  15. #14
    JFJr's Avatar
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    Leftlane News just said that it would be the TTV6, but cited the Car & Driver prediction. Man, I hope they're wrong. Ugh!

    Jud
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  16. #15
    JimmyH is offline Cadillac Owners 10000+ Posts
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    Re: 4.5 V8TT engine

    ATS-V is targeting the M3. M3 is going back to turbo 6. So ATS-V must be turbo 6. GM is just hoping the small percentage of BMW buyers who actually understand how an engine works won't notice the cylinder configuration.

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