Thread: Twin engine GTP project progress thread

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  1. #11 Re: Twin engine GTP project progress thread 
    GTP Level Member TwinV6GTP's Avatar
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    Quote Originally Posted by 91parkave View Post
    2 things

    1. All in all would it better trying mount a bonneville subframe or something with a 4t80 already?

    2. Do you ever plan on releasing the info from what you did specifically to get the 4t80 working?
    Get it working electrically I supposed ?
    Yes it's very easy but I am running full manual at the moment.
    At first I did it with push pull switches. The solenoid controls are just grounds and you need power to the solenoid (12V).

    Now I have a TCM820 which as the ability to auto shift via RPM sensing. But the RPM sensing is erratic so I shift manually.
    With the TCM820 I can control line pressure via a knob. I run full pressure because I don't drive the car on the street very much.

    For making it work via the stock PCM I think you have to invert the signals but turbocharged400sbc could answer this better I have not attempted to do ECM control.

    As for the Bonneville subframe it would have been probably a better choice but there are a lot of things to verify for compatibility for the knuckles and suspension. swaybars etc...

    I had all my mounting points done it was quicker to redo the mounts. Also it was already a problem the factory mounts are too sloppy for high powered cars so that had to be addressed. Two birds, one stone.
    Last edited by TwinV6GTP; 08-15-2014 at 06:18 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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