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Verdict on 2.3 vs 2.65 for Cobra

Discussion in 'Engine/Tuning' started by ATS, Apr 1, 2021.

  1. ATS

    ATS Member Established Member

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    I've searched this site thoroughly and I don't see a lot of information on the VMP gen 3 supercharger for the cobra.

    I recently purchased a stock 04 cobra with 70k miles. I want a setup that will hopefully promote some vehicle longevity, so I guess I'm looking to keep the car around 600-650hp, on pump gas without crazy boost levels.

    Everyone raves about the 2.3 tvs being a great fit for these goals and this application. Nonetheless, I'm hesitant to pay $3500 for a used one, when I can get the new 2.65 for $4400 or whatever.

    Is the bigger 2.65 really going to feel sluggish compared to the 2.3 when running only moderate boost and pump fuel? Or does the newer technology of the gen 3 kind of make up for that difference.


    Thank you.
     
    Last edited: Apr 1, 2021
  2. me32

    me32 BEASTLY SHELBY GT500 TVS Moderator

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    600hp ish stick with the 2.3 tvs, 2.3 whipple. If your serious about longevity on pump gas. If you dont drive it often then you can turn it up with a 2.65 or 2.9 whipple
     
    1Kona_Venom likes this.
  3. ATS

    ATS Member Established Member

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    Thank you! That was the direction I was leaning.

    When sticking to the 600hp mark, do you suspect the 2.65 would feel sluggish down low like the 2.9 whipple does on lower boost compared to the 2.3 tvs?

    it just seems nuts to pay 3500 for a used 2.3 when I could have a brand new 2.65 for 4300. But if it’s less snappy then I’ll go with the 2.3
     
    Last edited: Apr 1, 2021
  4. me32

    me32 BEASTLY SHELBY GT500 TVS Moderator

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    Being a smaller displacement engine i would assume the 2.65 would be sluggish at low boost much like the 2.9 whipple and 2.6kb.

    The 2.3 on both blowers are in the sweet spot for the 600hp mark.

    Personally for 3500 id spend the extra money and buy brand new whipple 2.3 or tvs 2.3.
     
    ATS likes this.
  5. ATS

    ATS Member Established Member

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    Ok I’ll do that!! I forgot we already have a 2.6 for comparison in the KB.

    Do you know of any way to buy a new 2.3 tvs?
     
  6. me32

    me32 BEASTLY SHELBY GT500 TVS Moderator

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    Contact the vendors on the site, i would assum 1 or all of these vendors can you the blower

    Lethal performance
    Beefcake
    Raven racing
    VMP
    2003-2004 Ford Cobra Whipple Charger
     
  7. 4sdvenom

    4sdvenom Never Enough! Established Member

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    I don’t believe they still sell the 2.3 TVS brand new. 2.65 only. I wouldn’t pay $3500 for a used 2.3 either unless you know it’s history and it doesn’t have a lot of run time. If you’re dead set on the 2.3 TVS I would wait until one pops up a bit cheaper or just go with the 2.3 Whipple.

    Ken
     
  8. DCguy

    DCguy Member Established Member

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    VMP has a big sale once or twice a year.....black friday and christmas last year they had the 2.65 gen3r head unit for $3700.
     
  9. cj428mach

    cj428mach Well-Known Member Established Member

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    If you aren't going to spin it on corn I'd go 2.3 tvs.
     
  10. D-MANN

    D-MANN Well-Known Member Established Member

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    Having had a kb 2.6H and a gen1 tvs 2.3 i would get a whipple 2.3 new with the newest rotors from whipple. I believe they are gen3 rotors now.


    Sent from my iPhone using Tapatalk
     
    me32 likes this.
  11. 01yellercobra

    01yellercobra AKA slo984now Established Member

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    FYI, the 2.9 Whipple doesn't feel sluggish at low boost. At least the gen 4 doesn't. My buddy just went from a 2.3 at 17psi to a 2.9 at 18psi and he didn't notice any loss down low. I went from an eaton to the 2.9 so it was all faster for me.
     
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  12. V6&V8SHO

    V6&V8SHO Well-Known Member Established Member

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    A 2.3 TVS on liquid gold is a great time.
     
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  13. me32

    me32 BEASTLY SHELBY GT500 TVS Moderator

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    18psi on a 2.9 isn't considered low boost. Also that makes much more than 600hp. I consider low boost on a 2.9 13-15psi. But running 2.3 at 15-17psi is the sweet spot for those as a regular driver.
     
  14. 01yellercobra

    01yellercobra AKA slo984now Established Member

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    It's all relative. A lot of people say anything less than 20psi with a 2.9 is a waste of the blower. I don't think a 2.9 could get down to 13-15. I have a 3.5" pulley to make the 18. As for the much more, than depends on the fuel/tune. I made 617 on 91 with a conservative tune. I wouldn't consider that much more.

    Now when the E85 tune is done I'm sure I'll be saying much more than 600.
     
    me32 likes this.
  15. me32

    me32 BEASTLY SHELBY GT500 TVS Moderator

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    Well typically that is correct 20psi is in the efficiency of the 2.9. It also takes more power to turn the 2.9 too. Depending on people's setups ive been in terminators running too low of boost IMO of 13-15psi and definitely out of its efficiency area.
     
  16. cj428mach

    cj428mach Well-Known Member Established Member

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    Malcolmv8 had a 2.9 Gen 2 Crusher trying to turn it slow to run pump gas and said it was just a dog. If a person is going to run pump gas the 2.3 tvs is the undisputed king.
     
    1Kona_Venom, Wings65288 and me32 like this.
  17. Bdubbs

    Bdubbs u even lift bro? Premium Member Established Member

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    I feel the "sweet spot" for a 2.3 tvs is 21-22 psi on E85. I don't recall what anything less on 91-93 pump gas feels like. Probably would feel slow to me.

    Sent from my Moto E (4) Plus using Tapatalk
     
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  18. SVTdreamin04

    SVTdreamin04 What's a "Termi"??? Premium Member Established Member

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    I love my little 2.3 TVS on the corn with a GT500 throttle body. Not sure what kind of power it’s putting down, but it makes me smile!


    Sent from my iPhone using Tapatalk
     
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  19. V6&V8SHO

    V6&V8SHO Well-Known Member Established Member

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    I run 93 and 18psi for the winter storage season in addition for the long road trips. Gets 21mpg and around 600whp. It’s just a different animal on corn the way it hits and of course another 100 or so whp.
     
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  20. GodStang

    GodStang Well-Known Member Established Member

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    If their car feels sluggish with a 2.6L/2.8L/2.9L on 93 octane then they built/tuned their car wrong and it's NOT the fault of the blower. That being said all of the blowers will put you in roughly same power levels sub 20 psi (unless you get really low in boost). Both the roots (tvs) and the twin screws (KB, Whipple). Now if you plan to add boost and maybe corn later on then the Twin Screws' efficiency will out shine the TVS in higher boost levels by a sensational amount.

    While I am a kenne bell fan as I have always had great luck with them I would take a Whipple over a TVS any day as Screw blowers are simply better technology than roots blowers.
     

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