How much HP do you have??

[chiefshocker]

LOL i'm the only one under 250hp so far. Guess i have some work to do...

[RedEye]

I really really want to hear about someone who put a high revving or some sort of Cosworth engine in their car, maybe with a sequential shifter. It would sound interesting with the big side pipes

[Maricopa]

500. All Cobras have 500hp. A guy at a gas station told me this once and his uncle had one. So my Cobra has 500hp.

[dallas_]

Originally Posted by Maricopa

500. All Cobras have 500hp. A guy at a gas station told me this once and his uncle had one. So my Cobra has 500hp.

I guess I have 500 too then.

[lippy]

637 HP/567 ft-lb, on an engine dyno

[chiefshocker]

Just for fun boys, I wasn't expecting scientific results..

[Robert McLinden]

I have 2 "HP", one a desktop and one a laptop.

[Tommy]

I've long been of the opinion that the only numbers that matter are lap time and elapsed time. Peak horsepower only matters as you approach your maximum speed in top gear, and I suspect only a few here have ever seen that. The rest of the time peak horsepower numbers are only good for bragging rights and some people have been known to exaggerate about such things.

[twin turbo]

Originally Posted by Tommy

Peak horsepower only matters as you approach your maximum speed in top gear, and I suspect only a few here have ever seen that.

What about acceleration thru the gears?

[Tommy]

Originally Posted by twin turbo

What about acceleration thru the gears?

Lots of people tend to think of horsepower as the UMMMPH that makes cars go. Therefore, they conclude that more horsepower results in quicker acceleration as well as higher top speed. And in casual conversation that's probably a good enough understanding. But technically, its an engine's torque that determines its rate of acceleration. Its possible (and sometimes desirable) to build two engines that produce similar amounts of torque, but at different points in the RPM range. The engine that produced its optimum torque higher in the RPM range would produce more power (horsepower), but it wouldn't necessarily be capable of accelerating more quickly. It would, however, be capable of pushing the same car to a higher theoretical top speed.

[Snake2998]

Originally Posted by Tommy

Lots of people tend to think of horsepower as the UMMMPH that makes cars go. Therefore, they conclude that more horsepower results in quicker acceleration as well as higher top speed. And in casual conversation that's probably a good enough understanding. But technically, its an engine's torque that determines its rate of acceleration. Its possible (and sometimes desirable) to build two engines that produce similar amounts of torque, but at different points in the RPM range. The engine that produced its optimum torque higher in the RPM range would produce more power (horsepower), but it wouldn't necessarily be capable of accelerating more quickly. It would, however, be capable of pushing the same car to a higher theoretical top speed.

That's actually wrong - it's horsepower or using another name for it "Rate of Work" that makes a vehicle accelerate quickly.

If you don't agree think of it this way - two identical cars geared for their rev range but with Identical torque - one a stump puller making peak torque at say 3000 revs hitting the limits of it's usable rev range at say 4500 rpm and the other making peak torque at say 5000 revs and peak horsepower at say 6000 revs racing down the drag strip. Which do you think will win. You're wrong if you think it's the stump puller - if you don't agree try feeding the figures into a drag simulator and you will see why horsepower matters.

[joyridin']

Kind of funny story...I was at a shop this week talking to a guy that is heavily into cars. He has a 1973 corvette with a 650 hp EFI big block Chevy engine in it with a Richmond 5 speed and 3.73 gears.

Last year, he wanted to go a little faster, so they took out the solid lifter cam and put a roller in it. The cam they put in was pretty radical from what he said. They took it for a ride and both were amazed at the new found power. He took it to his buddy's shop and threw it on a dyno to fine tune it. They ran it and found out it had 100 LESS horsepower than before! The old man that used to own the shop (he retired and gave it to his son) came over and said #3 spark plug was arcing. Lo' and behold, he was right. They fixed the wire and added 150 hp (50 over what it originally was).

Sometimes a lot of sound and cool parts do not equate to actual horsepower. He was laughing when he told me this story but he swears that the car FELT like it had tons more power after the new cam was installed all the way up till they saw the numbers on the dyno. The dyno stated different.

[joyridin']

Double post. My keyboard has been going a little nuts lately.

[CzyCobra]

Roush 427 SR w/510hp to the crank.... I plan on upgrading the heads, cam and intake.

Is it possible to take the baffles out of the side pipes, I did this on my ducati and it gained a few hp?

[mtrain2000]

HP, IS TQ over a period of time........

Now having said that, my 428FE engine has a mountain of TQ, but not a high hp peak, BUT that TQ drawn out with the help of the TKO600, 5 speed makes it a pretty lively vehicle.

Now the 540FE tunnelport engine that I have in my 67 Mustang fastback has even MORE TQ, with its 4.5" stroke, but sadly I've yet to get a chance to try it out.........One thing I can say is that the FE engine was different than most all other Ford engines I have ever built, and the most costly.