Th-400 question

[Juicedz]

I currently have a M6 in my 95z, I put 510rwhp and 520ftlbs to the wheels. How much power will I lose going to the th400?

[Juicedz]

any recommendations on where to buy a setup like this? transbrake, converter, flexplate, tranny, etc?

[Jeff_in_Atl]

any recommendations on where to buy a setup like this? transbrake, converter, flexplate, tranny, etc?

http://www.transmissioncenter.net/

[Squat13]

The gains of a high stall and a brake will total negat the power loses. You will understand when your yanking the front after dumping the break. Also it will be much more consistant in trap times.

[Juicedz]

true, but what about the power loss? 5-10% over the m6 or what?

[Injuneer]

Actual numbers, calculated by running the engine on an engine dyno, with full intake and exhaust, then installing the engine in the car and measuring rwHP on a chassis dyno.

Engine dyno:

NA: 486HP
1-stage N2O: 633HP
2-stage N2O: 762HP

With a steel flywheel Street Twin, stock T56, 3" chrome moly driveshaft, Strange 12-bolt with 3.73 gears, 17x9.5" wheels, with 275/40-17 tires:

NA: 425rwHP (12.6% loss)
1-stage N2O: 555rwHP (12.3% loss)
2-stage N2O: 670rwHP (12.1% loss)

Switch to a TH400, high stall, high slip, non-locking convertor (5,000rpm flash at 800 lb-ft), same type driveshaft (different length), same rear and gears, 15x10 Weld Pro-Stars w/ 28x11.5-15 QTP (which clouds the issue a little):

NA: 390 rwHP (19.8% loss)
1-stage N2O: 505rwHP (20.2% loss)
2-stage N2O: 600rwHP (21.3% loss)

Interesting thing is, for the reasons pointed out above, the car did not see any appreciable loss of 1/4-mile performance..... the "area under the curve" is not reduced. The peak HP may be lowered, but you get a huge increase in torque off the line, and the high stall convertor holds the torque high. Car still runs approx 117MPH on motor, 128MPH on a 125-shot at 3,760# race weight. No numbers for the current 300-shot.