Thread: Twin Engine GTP new 4t80E trans setup testing at dragstrip

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  1. #1 Twin Engine GTP new 4t80E trans setup testing at dragstrip 
    GTP Level Member TwinV6GTP's Avatar
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    back from the race... I'm uploading a video now.
    Wow what a frickin beast !!

    We know now it's a 9.6 1/4 mile car from the 1/8 number vs my last number when I ran 10.0
    And that was on the very 1st try with medium boost on a slippery track.


    The track was just rained on in the morning so the rubber on the track was all soaked and drying. Overall track was slippery as hell.


    Just to give you guys a point of reference. It was a big mustang meet and all of the newer Mustang GTs were running mid 15s low 15s at best.
    And even a GT500 that had a 1000HP label on it's side ran 11.6 on drag radials.
    I believe he was not on his most aggressive tune that day but still...
    it runs 10s normally according to the owner.


    So I do two test runs because I decided last minute Friday to change my 38s for 80lbs injectors and redo the tune in the parking lot.
    I get it fairly close. Made a run but it ran way too rich.
    So second run I lean it more, again too rich.


    3rd run I decide to do a full pass since I'm getting closer now. still running 10.5 a/f far from ideal power.


    BAM 6.31 @ 112 mph 1.48 60 foot without any effort and wrong shift timing (I have to manual shifters it's very hard to get it right).
    I have to get the auto shifter to work on it's own and the car will be much quicker.


    Still running medium boost, since the track was slippery and I couldn't do a full 1/4 mile there was no sense in beating it.
    When I ran my 6.3 on the 1st full pass I know for a fact that was a 9.6 pass and it could go much quicker with a little practice.


    We got rained on so no more practice passes for me.


    I will get the shifter issues sorted out and get a real suspension.
    The pogo effect on this super rough /bumpy track was obvious.

    Last edited by TwinV6GTP; 08-17-2014 at 03:41 PM.
    2015 Custom Twin Engine Nascar style car with dual GTP 3.8 drivetrain, Front trans 4T65e-HD, Rear 4t80e trans 1/4 mile 8.38 @ 165mph
    2000 GP Twin Engine Twin TD Turbo kits. Stock engines stock trans(s) stock injectors stock MAFs 0-60mph 1.8 seconds 1/4 mile 9.72 @ 139 mph
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  2. #2 Re: Twin Engine GTP new 4t80E trans setup testing at dragstrip 
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    Very nice but that announcer is borderline retarded.
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  3. #3 Re: Twin Engine GTP new 4t80E trans setup testing at dragstrip 
    GTP Level Member TwinV6GTP's Avatar
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    Quote Originally Posted by SnowFlake View Post
    Very nice but that announcer is borderline retarded.
    Why do you say that ?
    He's an old school V8 guy. They don't a whole lot of fast turbos. The quickest turbo there lately is 10.7 gutted civic. They had a 9.9 sec AWD DSM shop build many years ago.
    He was very surprised the car had twin engine he had just learned that. Plus he didn't expect the 6.3 time on the track. He told me himself the track wasn't sticky today.

    besides who cares... The car has a 4t80E and it runs awesome. The trans shifts hard 1st-2nd and shift hard in 3rd gear. Holds power like nothing.
    I'm sure it will take the higher boost. I got lucky on my trans.

    I am running the tight converter so it's slow spooling. I might need the Aurora 4.0 converter because right now I have to spool the rear engine before the front.
    Last edited by TwinV6GTP; 08-17-2014 at 06:03 PM.
    2015 Custom Twin Engine Nascar style car with dual GTP 3.8 drivetrain, Front trans 4T65e-HD, Rear 4t80e trans 1/4 mile 8.38 @ 165mph
    2000 GP Twin Engine Twin TD Turbo kits. Stock engines stock trans(s) stock injectors stock MAFs 0-60mph 1.8 seconds 1/4 mile 9.72 @ 139 mph
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  4. #4 Re: Twin Engine GTP new 4t80E trans setup testing at dragstrip 
    Donating Users 16MustangVet's Avatar
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    Another 4t80 swap and 2 Aurora 4.0 converters and this thing will RIP!!!
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  5. #5 Re: Twin Engine GTP new 4t80E trans setup testing at dragstrip 
    GTP Level Member TwinV6GTP's Avatar
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    Quote Originally Posted by 98GrandPrixIraqVet View Post
    Another 4t80 swap and 2 Aurora 4.0 converters and this thing will RIP!!!
    Yes, I can officially say the stock 4.6L northstar (Deville, Seville, STS) is WAY to tight. DO run the Aurora.
    But that 4t80e feels good so far. This was by far my hardest launch (8-9 psi per engine) and and it took well....

    BTW I had to do 2nd gear starts on both engines again because I did not have enough traction for 1st gear start on the rear engine...
    2015 Custom Twin Engine Nascar style car with dual GTP 3.8 drivetrain, Front trans 4T65e-HD, Rear 4t80e trans 1/4 mile 8.38 @ 165mph
    2000 GP Twin Engine Twin TD Turbo kits. Stock engines stock trans(s) stock injectors stock MAFs 0-60mph 1.8 seconds 1/4 mile 9.72 @ 139 mph
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  6. #6 Re: Twin Engine GTP new 4t80E trans setup testing at dragstrip 
    Moderator Russosaur's Avatar
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    Thing sounds like a jet, and that pogo looked sketchy as hell. I love this car.

    Sent from the Milky Way
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