Distance needed for top speed?

[wireeater]

Official hp is listed at 435 and 400 to the wheels and I've yet to see a dyno test that reflects that.

So I think it's reasonable to assume he's reporting truthfully. Or are there a ton of people that have shown it is 165mph with the PP?

Thanks

-Emt1581

That's not how it works friend.

Manufactures don't advertise HP to the wheels because some is lost through the drivetrain. They advertise crank horsepower, which is what the engine makes before it transfers the power to the wheels. They use engine dynos that measure it. The numbers you see are dynos that measure the power that makes it to the wheels. It depends if a car is manual, automatic or AWD, all have significantly more lose through the drive train.

A 435CHP manual car using stand calculation should be making 373WHP which is pretty much spot on with wheel dynos. Actually most make around 380. An automatic would probably see around a 10WHP less than a manual and AWD would probably see around a 30WHP loss.

Sponsored

 

[Emt1581]

Official hp is listed at the crank, which is why you haven't seen a dyno test reflecting that since those things measure power at the wheels.

The performance pack has different gearing, which will limit top end speed. You have to shift into OD earlier thus it won't top out as far. And top speed is pretty pointless in these cars, and the "performance pack" has other perks besides said top speed which make it perform better than a car without.

Oh ok, that makes sense. Not to get off-topic but what are the perks of a Torsen diff compared to the stock diff?

Thanks

-Emt1581

 

[FranzVonHoffer]

Oh ok, that makes sense. Not to get off-topic but what are the perks of a Torsen diff compared to the stock diff?

Thanks

-Emt1581

Torsen allegedly makes the car punchier at lower speeds. It feels a little quicker than non PP but I'm not a car whisperer. Could be my imagination. I got the PP for the brakes not the diff.

 

[Boddie]

Oh ok, that makes sense. Not to get off-topic but what are the perks of a Torsen diff compared to the stock diff?

Thanks

-Emt1581

To oversimplify, helps put power down better on turns which helps when tracking the car. Generally not as recommended for drag racing, which isn't really the purpose of the PP anyway.

 

[BmacIL]

Oh ok, that makes sense. Not to get off-topic but what are the perks of a Torsen diff compared to the stock diff?

Thanks

-Emt1581

Increased torque bias ratio to the outside tire (~3:1 vs. 1.8:1 max for the trak-loc), which is great for track driving. The caveat is that it becomes more sensitive to inside tire loading, as you need to have enough friction to allow the diff to bias. If you lift the inside rear, you have no drive.

 

[Emt1581]

Torsen allegedly makes the car punchier at lower speeds. It feels a little quicker than non PP but I'm not a car whisperer. Could be my imagination. I got the PP for the brakes not the diff.

Oh ok. I went with the PP to improve normal everyday driving for a better experience. I have absolutely no plans to drag race the car at a track and no plans currently to take the car to a track but who knows years from now.

I'm extremely happy with the car so no complaints!

-Emt1581

 

[EFI]

Torsen allegedly makes the car punchier at lower speeds. It feels a little quicker than non PP but I'm not a car whisperer.

It's punchier at low speeds and feels quicker because of the tighter gearing, which multiplies torque more and accelerates quicker. You're not dreaming, it's real.

 

[Emt1581]

If you lift the inside rear, you have no drive.

Not sure what that means.

-Emt1581

 

[NOLA_Stang]

You ever see a hipster wearing flannel and huge beard, but he's never left the city, doesn't know the difference between an axe and a maul, and generally can't survive without a cell phone? I feel like I'm reading that visual right now lol.

But hey, at least you're learning.

 

[BmacIL]

Not sure what that means.

-Emt1581

If, through surface variations or too much inside tire lift, the tire loses grip, the diff won't bias torque and that lightly loaded/unloaded tire will just spin. The torsen needs a loaded inside tire in order to generate the friction to bias torque to the outside.

 

[Grintch]

Official hp is listed at 435 and 400 to the wheels and I've yet to see a dyno test that reflects that.

So I think it's reasonable to assume he's reporting truthfully. Or are there a ton of people that have shown it is 165mph with the PP?

Thanks

-Emt1581

Wrong, hp is reported at the crank. Like it has always been.

Car has an electronic limiter at 165, which a standard 6 speed will do in 5th. The problem is the PP tops out at 151 in 5th, and it will take a long time to accelerate much beyond that in the fuel economy 6th gear.

 

[Emt1581]

Car has an electronic limiter at 165, which a standard 6 speed will do in 5th. The problem is the PP tops out at 151 in 5th, and it will take a long time to accelerate much beyond that in the fuel economy 6th gear.

With all the money people throw into these cars, I'm curious if there is a way to take that limiter away after adding power, and what that would involve?

-Emt1581

 

[ahl395]

With all the money people throw into these cars, I'm curious if there is a way to take that limiter away after adding power, and what that would involve?

-Emt1581

Someone please correct me if im wrong, but I believe a tune can remove the limiter. But there is a "hard" limit at 186 that cannot be removed.

 

[Emt1581]

Someone please correct me if im wrong, but I believe a tune can remove the limiter. But there is a "hard" limit at 186 that cannot be removed.

Not that I plan on doing it, but what tune does it or can they all be made to do it?

Thanks

-Emt1581

 

[kz]

Oh ok, that makes sense. Not to get off-topic but what are the perks of a Torsen diff compared to the stock diff?

Thanks

-Emt1581

It has nothing to do with Torsen, everything to do with shorter gearing PP has. It's pute math, everything else being the same, there's theoretical maximum speed with engine RPM your car can achieve. Taller the final drive ratio, higher the speed. PP has the _shortest_ ratio.

Sponsored