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  1. #1 Twin gtp e engines custom car runs 9.11 
    GTP Level Member TwinV6GTP's Avatar
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    Yup trans are slipping bad, especially the rear since I can't turn down the power.
    Up front I limit the power to 20 psi of boost.

    9.11 @ 145 mph backing off before the end (out of gear on the rev limiter because of trans/torque converter slip).
    Easily an 8 second car if we can get the trans to hold the power. I can't lower power more at the back so I will have to put on a bigger wastegate.
    then with less slip and less power the car will go faster.

    Ran a 1.32 60 foot in practice, then tried a full pass for the 1st time. 9.11 @ 145mph.
    0-60 mph was recorded by GPS at 1.6 seconds !

    Car revs 6900rpm from start to finish the shift light never turns OFF !!! Talk about slip...
    The traction was really good making the problem even more obvious.

    Last edited by TwinV6GTP; 05-17-2015 at 08:26 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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