5.2L Supercharged V8 Confirmed

[zombiekiller]

I'm not giving any rates. I'm relaying what I know about FPC engines and why the Voodoo motor is a fragile flower. All engines only produce torque- period. HP is just a calculated number.

the torque numbers down low aren't what you'd want in a truck with the FPC. It is the same reason why the voodoo is amazing on a road course, but awful to try to drag race.

I've put approx 15K in HARD, almost 100% track driving on my gt350. I had the motor gone through and the heads flowed, plus a few other special tricks that my engine guy did. I havent had one single issue. The rings are loose as hell on Voodoos. I've come to find that if you whoop on the car as it was designed, the motors are much much happier long-term and produce bigger numbers.

If you baby the car or only use it for slow sunday cruises. you're missing out on a LOT of fun. if you drive the car at no less than 7/10s, its a whole new animal and REALLY hard to beat dollar for dollar.

 

[zombiekiller]

The voodoo motor has been less reliable then Ford hoped and it’s not recommended to add a supercharger to that motor. That’s why the new GT500 is not a FPC motor. Not all will have problems but it’s outside the acceptable failure rate. Buy the way, the power curve of the Voodoo would be awful for a heavy truck, but a large displacement super charged motor would be a lot of fun now that I am use to the Ecoboost it really is a great match to our trucks and makes huge TQ right where we want and need it. Even in the much lighter mustang the voodoo is soft at lower RPM’s. Drive one and you will understand.

motor doesnt get sporty until about 4000-4250. Then all of the sudden it comes on like a freight train. if you weren't listening to the motor, you'd think it felt exactly like turbo lag. yes, it is that stark of a jump off point.

 

[mezger]

All engines only produce torque- period. HP is just a calculated number.

How much torque does a rocket engine produce?

 

[rtmozingo]

How much torque does a rocket engine produce?

All the torques. That's why supercharging a rocket engine provides the best results of all.

 

[EricM]

How much torque does a rocket engine produce?

OK- all internal combustion engines.

the torque numbers down low aren't what you'd want in a truck with the FPC. It is the same reason why the voodoo is amazing on a road course, but awful to try to drag race.

I've put approx 15K in HARD, almost 100% track driving on my gt350. I had the motor gone through and the heads flowed, plus a few other special tricks that my engine guy did. I havent had one single issue. The rings are loose as hell on Voodoos. I've come to find that if you whoop on the car as it was designed, the motors are much much happier long-term and produce bigger numbers.

If you baby the car or only use it for slow sunday cruises. you're missing out on a LOT of fun. if you drive the car at no less than 7/10s, its a whole new animal and REALLY hard to beat dollar for dollar.

Nobody said they all fail. You can go beat on it all day everyday and it might last your entire life. As a percentage though- they fail way more often than Ford's other engines. Granted, I'm going from hearsay and I don't have access to actual internal warranty numbers from Ford- but it hasn't got the reputation for failure because it never fails. The fact the race teams won't touch it speaks volumes. If it was SO great for road racing, you'd think people who, you know, make their living road racing would use it- but instead they specifically avoid it.

 

[mezger]

OK- all internal combustion engines.

ok... rxF is also a calculation. As is determining torque on a dyno. Depending on the dyno, you're doing something like counting a signal from an inverter while simultaneously measuring time, and calculating acceleration with a known moment.

Bottom line is hp determines acceleration for any non-zero speed, I can show the derivation again if needed. It's very fundamental and straightforward physics.

 

[EricM]

I can e

ok... rxF is also a calculation. As is determining torque on a dyno. Depending on the dyno, you're doing something like counting a signal from an inverter while simultaneously measuring time, and calculating acceleration with a known moment.

Bottom line is hp determines acceleration for any non-zero speed, I can show the derivation again if needed. It's very fundamental and straightforward physics.

The crank is literally producing a torsional force though. You may have to measure and multiply to figure out what the torque number actually is- but it doesn't change the fact the crank is only producing a torsional force.

 

[mezger]

I can e


The crank is literally producing a torsional force though. You may have to measure and multiply to figure out what the torque number actually is- but it doesn't change the fact the crank is only producing a torsional force.

But if it's doing it at anything greater than 0 RPM, it's producing power, which is the useful metric if you care about acceleration or pulling a load up a hill.

 

[EricM]

But if it's doing it at anything greater than 0 RPM, it's producing power, which is the useful metric if you care about acceleration or pulling a load up a hill.

Still- the engine is ONLY producing a torsional force. If it delivers an even 100 ft-lbs from zero RPMs to 10,000 RPMs- it still only produces 100 ft-lbs of torque. The HP numbers are calculated to determine how much work that 100 ft-lbs of torque can do at a particular RPM.

 

[mezger]

Still- the engine is ONLY producing a torsional force. If it delivers an even 100 ft-lbs from zero RPMs to 10,000 RPMs- it still only produces 100 ft-lbs of torque. The HP numbers are calculated to determine how much work that torque can do at a particular RPM.

Actually, it's producing power and torque, depending on what measurement you want to make. The fact that it's rotating and producing torque means it's producing power. There is a distinction in the definitions, power is the useful one.

And to get precise, power determines how fast work can be done, not how much can be done.

If I can produce 1000 ft*lbs with a long breaker bar + my arms, why do we bother with complicated and expensive engines?

In your example, gear down that 100 ft*lbs * 10000 RPM and you'll make a lot of torque at the wheels at a pretty decent speed...