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  1. #1
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    Default 350 or 400 turbo

    I will be converting my m6 car to a auto. I have a 350 and 400 Turbo. I know the 400 is tougher but takes more to turn it. Engine is a 383 12:1 compression, ported 643 heads custom grind cam on a 250 shot. 28 inch tire 373 or 4:11 gears. It will be mainly a street car.
    [SIGPIC]

  2. #2
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    Joel
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    Default

    I would do the 400. If your doing mainly a street car to drive. I would get in touch with @Cahall. You may want to look into a 4L60E for overdrive and improved street manners.

    Sent from my SM-N915V using Tapatalk

  3. #3
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    Default

    I have a 350 and 400 already both in great working shape.

  4. #4
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    Default

    Street car.... 4.11 gears.... no O/D. Not too street friendly, unless you avoid freeway driving. With street tires, I was turning almost 4,000 RPM at 70 MPH. It is a non-locking converter, which didn't help. Didn't take long before I opted for a Gear Vendors O/D. With the torque available from the 250-shot go with the 400.
    SOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.

  5. #5
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    Alex Rauld
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    Default

    Th400 damn near unbreakable when built right, the th350 isn't really a huge step up in strength from a 4L60e and might even seem stronger just because so few people know how to properly build a 4L60e.

  6. #6
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    Default

    Its going to be a weekend car mostly to shows and to the track.

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  8. #7
    The FABRICATOR!


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    Chris
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    Default

    Will you be running 1/8 or 1/4 mile? What is the max rpm you want to spin the engine? You may consider a higher gear, maybe a 3.50 ratio. It would help with the highway rpm as well as cross the beams at a more reasonable rpm
    Chris
    1985 Monte Carlo SS
    Mods: 9:1 383 LT1, Ported Trick Flow heads, D1SC Procharger, 4L80E, 3.50 9"
    Check out the M122 MCSS build thread here!

  9. #8
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    Tyler Sandy
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    What are you doing with the M6?

    '94 Trans Am GT A4 "Ballin' On A Budget"-LPP LT Headers, ORY, CAI, Hooker Catback, TB Bypass, TB Air foil, and a handful of cheap appearance mods...

  10. #9
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    Kyle
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    Default

    another vote for 400, seems u should be making good power and tq
    Kyle

    just ur everyday slow LT1. wanna try her out?

  11. #10
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    Selling it.

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