Tech question on HP/Torque vs weight

[tweaked]

Hello all,

Could someone tell me how much (or where to find the info) HP/Torque the 2002-2003 Explorer need to reach 5.5 sec 0-60 times? Is this feasible? There should be some kind of "average" formula to use?

Thanks,
Stephane

 

[Alec]

You'd probably need at least 400 hp. Just a guesstimate.

 

[Majisto]

Getting more horsepower will change the weight of the vehicle, and thus will change the acceleration rate. 5 1/2 seconds could probably be done with a supercharger setup combined with a tuned motor and a good intake/exhaust system. Maybe a Kenne Belle twin-screw will fit on the modular 4.6 Explorer. That will get you going quickly.

 

[tweaked]

Thanks for the replies. I read a few weekes back that the Kenne Bell will only bring the acceleration to 7.9. Other SC will do about the same. When you talk about a tuned engine, you mean pistons, bore etc? Did anybody on this forum modify his 2002 + Ex to achieve that kind of acceleration?

Thanks again,
Stephane

 

[Alec]

Since the block is the same as the Mustang 4.6, you can use many of those parts. As you've already found out, making a 5000+ lb SUV haul ass is hard. You'll need to do more than just bolt on a supercharger.

For the gains needed, I'd look into a centrifugal s/c with an intercooler instead of a roots or screw type. Then with a worked block you can turn up the boost easier.

It is possible, but it all depends on the $$$ you want to spend.

 

[Majisto]

Originally posted by Alec
Since the block is the same as the Mustang 4.6, you can use many of those parts. As you've already found out, making a 5000+ lb SUV haul ass is hard. You'll need to do more than just bolt on a supercharger.

For the gains needed, I'd look into a centrifugal s/c with an intercooler instead of a roots or screw type. Then with a worked block you can turn up the boost easier.

It is possible, but it all depends on the $$$ you want to spend.

What's wrong with a twin screw? I don't know much about the Centrifugal (Vortech, right?) chargers, but the Kenne Bells are very nice. How fast is a V-8 X stock? Geez, I would hope it's not above 8. My stock V-6 runs 8 seconds.

By tuned engine, I mean one with a chip. A built engine would be heads/cam and all of that pizazz.

 

[Alec]

It would need to be "built".

Centrifugal superchargers are much easier to tune to higher boost levels and are much more thermally efficient with a good intercooler.

I'm all for roots and screw s/c's, but centrifugals are better for building crazier levels of power.

 

[Majisto]

Originally posted by Alec
It would need to be "built".

Centrifugal superchargers are much easier to tune to higher boost levels and are much more thermally efficient with a good intercooler.

I'm all for roots and screw s/c's, but centrifugals are better for building crazier levels of power.

How does it work? Is the Vortech the s/c that looks like a turbo blower?

 

[Alec]

Yes.

A centrifugal s/c is a snail just like a turbo. However, instead of exhaust gases driving the compressor, a pulley does.