Thread: Gen2 LS4 swap info

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  1. #1 Gen2 LS4 swap info 
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    I've been looking through forum, I'm sure it's been done. I'm looking at buying a 2002 intrigue Final 500 car with blown motor.

    Thinking about LS4 swap. Who's done this and what issues could I be looking at. Links to previous projects?
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  2. #2 Re: Gen2 LS4 swap info 
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    What motors came in them originally?
    - 2001 Grand Prix XGT -- 11.21@124MPH
    - 2010 Chevy 2500HD LTZ -- Car hauler
    - 2011 BMW 328i Xdrive -- Wife's Daily
    - 2014 Ford F250 crew cab -- 6.2 liters of ford fail
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  3. #3 Re: Gen2 LS4 swap info 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Quote Originally Posted by NebTurboST5 View Post
    What motors came in them originally?
    3.5L Twin Cam V6.

    The cool factor: "This Intrigue is one of the "Final 500" Oldsmobiles ever to be produced"

    One of them sold for $12,100 at Barrett Jackson in Las Vegas 2008.
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  4. #4 Re: Gen2 LS4 swap info 
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    Most of these don't go for anywhere this kind of money, because most are just daily driven. I found one140k miles, normal wear and tear for salt belt. Which means it's not worth much, but would be nice to mod for something different.
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  5. #5 Re: Gen2 LS4 swap info 
    The Blue One blueguy's Avatar
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    I'd venture to say a blown 3800 would be much more along the lines as something that would have fit that car.

    After owning an LS4, I'd tell you to run away from it lol
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  6. #6 Re: Gen2 LS4 swap info 
    Bastard Reptile's Avatar
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    Quote Originally Posted by blueguy View Post
    After owning an LS4, I'd tell you to run away from it lol
    After working on said car, I agree wholeheartedly.
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  7. #7 Re: Gen2 LS4 swap info 
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    Thanks, I'll look into L67 possibly
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  8. #8 Re: Gen2 LS4 swap info 
    GXP Level Member 91parkave's Avatar
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    After owning a 3800 then going to ls4 I'd say go with ls4.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  9. #9 Re: Gen2 LS4 swap info 
    The Blue One blueguy's Avatar
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    Quote Originally Posted by 91parkave View Post
    After owning a 3800 then going to ls4 I'd say go with ls4.
    lol, not even close. The LS4 is such a hodge podge crap pile.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  10. #10 Re: Gen2 LS4 swap info 
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    How so?? Please explain

    Especially if your starting a build with one alreadyear out the car, a simple cam and intake will net you at least 340whp. Take that into consideration.
    Last edited by 91parkave; 10-08-2016 at 09:56 AM.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  11. #11 Re: Gen2 LS4 swap info 
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    Quote Originally Posted by 91parkave View Post
    How so?? Please explain

    Especially if your starting a build with one alreadyear out the car, a simple cam and intake will net you at least 340whp. Take that into consideration.
    and it destroys the trans in record time.
    2003 SSEi,
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  12. #12 Re: Gen2 LS4 swap info 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Quote Originally Posted by 91parkave View Post
    How so?? Please explain

    Especially if your starting a build with one alreadyear out the car, a simple cam and intake will net you at least 340whp. Take that into consideration.
    Oil leaking valve cover, a junk transmission, stupid voltage problems that fry batteries, burns oil, lifter tick, etc etc..

    LOL @ 340 WHP from a "Simple Cam and intake"... You know they only make about 230-240 wheel horse stock, right?

    The only way a simple cam and intake alone would get you there is if you actually had 289 WHP, but ran on a dynojet with at 15% HP inflation.
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  13. #13 Re: Gen2 LS4 swap info 
    GXP Level Member 91parkave's Avatar
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    Quote Originally Posted by Explicit_Spade View Post
    Oil leaking valve cover, a junk transmission, stupid voltage problems that fry batteries, burns oil, lifter tick, etc etc..

    LOL @ 340 WHP from a "Simple Cam and intake"... You know they only make about 230-240 wheel horse stock, right?

    The only way a simple cam and intake alone would get you there is if you actually had 289 WHP, but ran on a dynojet with at 15% HP inflation.
    Why u might have 3800 experience out the ass. Your ls4 knowledge or experience in ls4s seems nill
    Leaking valve covers? No....that's a known 3800 faulthe not ls4

    The junk trans? Yea welcome to w body land. We all have the same issue with that.

    Voltage problems? Never had issues with beyond operator error and lack of attention to detail when modifying the car.

    Burns oil yep easily remedied by turning off dod in the tune and utilized a catch can. op could do a non dod cam upgrade. With non dod lifters to eliminate the physical dod parts as I mentioned before.

    Lifter tick--rare if ever and not just a problem associated to the ls4 no more than a 3800.

    Tuned these cars have been in the high 260s whp intake and exhaust 290 intake swap and headers 310whp cam to utilize it all 340. That's not inflated.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  14. #14 Re: Gen2 LS4 swap info 
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    Quote Originally Posted by 2003 SSEi View Post
    and it destroys the trans in record time.
    I dunno if mean I'm at 120k on stock trans on e85 and nitrous and cam with no issues.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  15. #15 Re: Gen2 LS4 swap info 
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    Weird, I pulled that list of LS4 problems straight from someone on an LS4 forum. It has nothing to do with my 3800 knowledge.

    So now you're talking about:
    Cold air intake
    Intake Manifold
    Headers
    Catback
    mild Cam
    and a Dyno specific Tune
    All without a built trans
    ...Probably still done on a dynojet to inflate the numbers 12-15%...

    That's a lot of work and money spent to lose to a supercharged 3800.
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  16. #16 Re: Gen2 LS4 swap info 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Maybe be a somewhat friendly dyno to see those numbers, not saying it's not possible but on regular pump gas it seems a tad high. I woulda said 325ish on pump gas.

    Knowing trucks have more drivetrain loss and bigger things to turn, seems most guys can hit 320-330whp on the GEN 4 engines. They also have 325hp at the crank to start with though. Gen 3 engines with 285-295 CHP, hit 300whp with cam/headers/tune.

    SMGPFC Member #1
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  17. #17 Re: Gen2 LS4 swap info 
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    What would be the biggest challenge to getting it to work
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  18. #18 Re: Gen2 LS4 swap info 
    GXP Level Member Turbocharged400sbc's Avatar
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    The lack of CAN bus data communication... as the ls4/05+ cars utilize a much faster Network scheme to communicate with the body control module and the instrument panel computer.
    The Oldsmobile would have the older serial data system and you would have a difficult time getting the cars instrument panel cluster to work with the newer CAN bus data
    ~James~ Psychotic Gearhead
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    00 Turbo Regal 608 fwhp 575ftlbs at 5500rpm, 98 WhippledRiv, 97 GTP
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  19. #19 Re: Gen2 LS4 swap info 
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    Where's like button?
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  20. #20 Re: Gen2 LS4 swap info 
    GXP Level Member 91parkave's Avatar
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    Still a non issue as you you could easily use a express van 0cm and harness. Which plays well with older style bcms. Transmission control should be able to be segment swapped and use the 4t65 programming
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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