My experience with Hellion Top Mount..

[StickShiftyFifty]

Yea i went with PAC beehive springs

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[illtal]

Yea i went with PAC beehive springs

my bad, I see where you put that in the original post.

 

[Timbuck]

Just wow. That’s getting it done . We need some in car footage of the driving fun hahaha
what psi now ??

 

[Grimreaper]

Congrats and nice setup and numbers!

 

[Andy13186]

Motor should last long too since you dont have to rev it out too high.

 

[StickShiftyFifty]

I’m pushing a little over 14 psi thanks guys. Cars an absolute blast, thing is really hard to get it to hook now lol

 

[80FoxCoupe]

I’m pushing a little over 14 psi thanks guys. Cars an absolute blast, thing is really hard to get it to hook now lol

Nice work. 1000hp is the sweet spot. Not too serious, but more serious than most.

 

[Angrey]

Nice bump.

Given the torque curve, you're probably one of the best candidates I've seen for torque/RPM/Gear analysis. I'm betting to optimize acceleration you shouldn't ever rev it more than 6500 rpms.

 

[robvas]

I'm betting to optimize acceleration you shouldn't ever rev it more than 6500 rpms.

You would be a fool to not rev that to 7k

 

[Angrey]

You would be a fool to not rev that to 7k

You'd be a fool to post this and not understand how torque and acceleration work. In order to maximize acceleration, you maximize the torque under curve for the rpm span for that gear.

Given his peak torque is around 5300 rpms and has a steep decline on both sides, he's a perfect candidate to center the gear range around the peak. They actually have calculators for this where you input the curve values for the torque and it'll show you where the optimal shift points are for each gear (depending on the rpm drop).

For his setup, every rpm past 5300 is a significant reduction in torque (and hence a reduction in forward acceleration and hence a reduction in elapsed time for a given distance).

 

[robvas]

You'd be a fool to post this and not understand how torque and acceleration work. In order to maximize acceleration, you maximize the torque under curve for the rpm span for that gear.

Given his peak torque is around 5300 rpms and has a steep decline on both sides, he's a perfect candidate to center the gear range around the peak. They actually have calculators for this where you input the curve values for the torque and it'll show you where the optimal shift points are for each gear (depending on the rpm drop).

For his setup, every rpm past 5300 is a significant reduction in torque (and hence a reduction in forward acceleration and hence a reduction in elapsed time for a given distance).

Ahh so you're one of those guys

spoiler alert: the party is just getting started at 5300 with that car

 

[Angrey]

Ahh so you're one of those guys

spoiler alert: the party is just getting started at 5300 with that car

Spoiler alert. Not according to the dyno graph. It makes peak torque around 5300 rpm of around 946 ft-lbs and by 7k rpms it's dropped off more than 25% to less than 700 ft-lbs. If you shift at redline, the start of the next gear is near the peak torque but the rest of the gear run out is all on a pretty steep downward slope.

Assuming perfect traction, this car would go faster by short shifting and straddling the peak torque to maximize the force to the tires.

But you do you.

 

[robvas]

Spoiler alert. Not according to the dyno graph. It makes peak torque around 5300 rpm of around 946 ft-lbs and by 7k rpms it's dropped off more than 25% to less than 700 ft-lbs. If you shift at redline, the start of the next gear is near the peak torque but the rest of the gear run out is all on a pretty steep downward slope.

Assuming perfect traction, this car would go faster by short shifting and straddling the peak torque to maximize the force to the tires.

But you do you.

Interesting theory, so at what RPM would you shift this stock 2018 Mustang GT

 

[Angrey]

Interesting theory, so at what RPM would you shift this stock 2018 Mustang GT

On this car, the drop in torque isn't significant enough to overcome the drop in driveline multiplication, so you're better off staying in the lower gear as long as possible.

The idea is to maximize the total torque production to the wheels, so in a torque profile where it drops off significantly, it may present a scenario where staying in the lower gear (with more multiplication) crosses over to less than if you shifted (lowering the multiplication but increasing the motor output).

It's rare to see it on manual, "race" type setups, especially if the gear ratios are wide, but in close ratio trans, especially like the A10, where the drop in multiplication isn't as drastic, something with a top end torque loss means the car will actually accelerate faster by short shifting.

Even with this flatter torque curve, you might find that a 10% drop in multiplication isn't as much as a 15% drop in torque production.

There are calculators that work all this out, and in many/most cases it makes sense to just stay in the lower gear as long as possible. But sometimes you see a torque curve that it might make sense to short it.

 

[robvas]

You want horsepower, forget about torque. It's "plummeting" because of the way HP is derived. If you took your own advice and plotted hp vs gear you would see the shifting early is wrong.

I think a lot of people watched that Engineer Explained video and are in your position.

Your shift point of 6500 is going to put that car below its peak torque point where boost is fully built and anyone who's ever drag raced knows that's not where you want to be.

the Y axis of that graph going to 1000 is also distorting your view of the falloff compared to the other

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