1981LT1

Is it possible for the torque converter to be too tight in my car? I put a factory replacement 86 TPI converter behind my LT1 and I have to press hard on the brakes to keep the car stopped. It only idles at 850 RPM's but the car is lurching forward unless I have the brake fully depressed. I was wondering if going with maybe a 2200-2400 stall would fix this probem?

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1981 - '95 LT1, cc306, 1.6 roller tip rockers, 58mm TB, LE stage 2 head/cam package, T-56 trans, full length headers, dual 3" flowmaster exhaust, custom computer tune, 17x8 and 18x9 Boze Pro-Touring wheels, 4-wheel disc brakes, 3.73 gears = 345rwhp (before heads), 350 ft/lbs torque (before heads)

1986 - 95 LT1, cc305, T-56 trans, flowcrap headers, flowmaster 3" cat-back, custom computer tune, 06 C6wheels, 4-wheel disc brakes, '02 T/A seats

Apeiron

Idling at 850 RPM in gear? Why so high?

1981LT1

No particular reason. That's just what we set it to.

Duck

Lowering the idle speed to the recommended level will reduce the forward creep, but it will still be there to some extent. Installing a converter with a higher stall ratio will reduce the creep. We recently installed a Pro-Built 700-R4 and Edge 9.5-inch 2600 stall converter in our '92 5.7. At idle the car does not creep, slightly up say 900 rpm the car does creep. It does take more throttle compared to the stock 12-inch converter to accelerate the car, but not a lot, and oddly, the cruising RPM on the highway is less than before the new parts were installed. At WOT, the car is much faster. Gas mileage is the same or better than before. Eventually, when I swap the stock converter in my '87 IROC 5.7, it will be an Edge 9.5, but due to my need to drive through lots of city stop-and-go traffic, will probably choose a 2200 stall ratio.

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Duck_SoCal
87 IROC-Z 5.7, 92 Z28 5.7 25th Anniversary, 91 RS Ragtop

1981LT1

Thanks for the reply!