Well, I finally got a chance to run my dad's pulley swapped 90 Thunderbird SC. We went from a 10 mph roll and was dead even until I hit 3rd then I pulled about a 1 or 1 1/2 lengths on him. Second run we went from a 40 mph roll with me pulling an instant 2 cars. He really wanted to race me from a dig but I'm the worst person in the world at launching a manual transmission vehicle. Once I get some practice launching, I'll run him from a dig. He thinks he'll take me then....

 

wow i had no idea thundebird s/c's could be made competitive with a fox with just a pulley swap. nice kill either way. your torque would get him off the line, give it a shot sometime.

 

Factory ratings for them are 210 HP and 315 lb/tq. That was before the pulley swap, I dunno what kinda numbers the smaller pulley would produce. It claimed 40-45 lb/tq but didn't give a claimed HP increase. I'm sure thats not too accurate though...

 

[&:][&:]damn! i bet that thing would smoke my car.

 

is it the 3.8L supercharged?

pulley swaps are worth 5hp at the most

you should pull on him from the line and even more once u get goin

 

Yes it is a supercharged 3.8. Only 5 hp? Why do people make such a big deal about pulley swaps on Cobras then? Is the claimed gain of 40-45 lb/tq accurate or is that way out in left field?

 

He is talking about swapping the pulley on the supercharger, not swapping the drive accessory pulleys out for underdrive pulleys.

 

What kinda gains do you guys think he is seeing from the smaller supercharger pulley?