BADSZ28

iTrader: (39)

Just like it says. Can anyone help me?
TIA

wrencher

iTrader: (2)

Inertia of T-56? ?

BADSZ28

iTrader: (39)

Yeah. The rotating mass. The resistance to motion or change. I would like to know of the LS1 motor too.

SMOKIN01TA

iTrader: (10)

i dont want to sound sarcastic but who gives, like what are you trying to figure out here.

BADSZ28

iTrader: (39)

Acceleration is all about moving a mass. If I know the inertia of the engine and the load on it I can better determine HP and TQ needs, gear ratio and RPM relationship to shift points. It's just a different approach. Guess and check doesn't work for me.

Great work with your car by the way.

SMOKIN01TA

iTrader: (10)

well to even begin to determine that you have to know like a billion things about the motor. just a offer, tell me what you want to run and ill tell ya what you need, that will remove guess work.

btw, if you want to know load on the motor get a-tap, it tells you instantaneous load.

just currious, but are you a mechanical engineer

P Mack

iTrader: (6)

I think the word you're looking for is moment of inertia. I don't know what it is but it would effectively change when you change gears for each different gear ratio. You'd also have to know it for the driveshaft, differential, axles, tires, etc. You could rig up an experiment to figure it out though. Let me know if you want my idea on how to do that.

But why stop there, you also need to get the car's drag coefficient, rolling resistance, and if you want to get real crazy, the change in mass as it burns the fuel in the gas tank through the run.

My point is, this is a hell of a problem to figure out with pencil and paper, especially when it has been figured out exactly for tons of different combos already with the answer printed on a timeslip.

BADSZ28

iTrader: (39)

Yeah I know. I justed wanted to take it step by step. I am actually an Electronic Engineer working a Mechanical Engineer Possition. I actually size servo motor systems. I know changing the gear changes inertia of the load, thats one of the reasons why I am looking into this. But I think I am just waisting my time. I will just stay with the basics. I will just look at my dyno graphs, weight, and speed through the traps. We all know lightening rotating mass, and throwing in a shorter gear will give us better acceleration.

calhoon

iTrader: (6)

Sounds like neither of you know what you're talking about. The moment of inertia is the effective center of mass rotation. The inertia question( I think) is relative to the mass of the components. Each rotating component has an inertia value that is considered in th reflective inertia of gear changes. This is a value most used to design synchronization systems.
Bottom line- if you don't know what you are asking ,you prolly don't know how to use it .

P Mack

iTrader: (6)

The word you're looking for is reflected inertia. But since you're smarter than everyone here you already knew that.

BADSZ28

iTrader: (39)

wrencher

iTrader: (2)

So your original question is useless, there are no other parts for a T-56 you can change (gears) so it is a constant.

P Mack

iTrader: (6)

I meant change gears = shifting. The (reflected) inertia of your drivetrain will look different to your engine in 1st than it does in 2nd.

BADSZ28

iTrader: (39)

Yes. So I would have to compile 4 different inertia loads to the motor. So. I realise that. It isn't a waist. I can determine shift points, what gear to use (rear end), and at what RPM I want to be at passing the traps.

wrencher

iTrader: (2)

So you should re-title the post what are the gear ratio's of the F-body or Y-body T-56? That is the question you are asking ?

BADSZ28

iTrader: (39)

I also need to know that, but I need the inertia of each through the tranny. What would be the reflected inertia from the output shaft for each gear?

Phoenix 5.7

iTrader: (7)

this is way too scientific, just ask somebody what the best setup is instead of this complicated math.

jmd

iTrader: (4)

If you were racing a 780,000 race car and needed to compare the virtues of a wider centerline distance from mainshaft to countershaft vs gearset strengths & gear ratios availability, this would all matter. All you need to know is that the changing of the T56 for something else isn't worth it 99.9% of the time if we're talking manual trannies, nor is changing gear ratios and you're not going to create custom one off custom parts for it, so don't sweat it. Make the post power you can given your budget & drivability concerns, change the rear axle for something higher than 3.42 if you want, put down the calculator, and enjoy the car.

BADSZ28

iTrader: (39)

Yeah, I already decided to do that. I don't have time to sit here and calculate all that info. I will just go with the basics. Powerband, gears, and weight.