i beat my friends '02 cammed Z06 everytime we race at the track and he definitly has more HP then me.

 

Its about the tune and only the tune for me. # doesn't matter. "How much horsepower do you have?" That is always a question you get asked when getting out of your car at the store, soccer practice etc... Then you have to think of a number, do you give them an inflated or honest number? or do they want "crank" or wheel hp?? I just answer: "Enough to keep my kids in their seats"

 

Amen

 

I agree with the others, if you dyno it should be used as a reference. I've never dyno'd cause the track numbers will tell you roughly and honestly where you're at. Its mainstream to talk about hp numbers, but its more important to talk about tq/lb.

 

for me, it's all about power to weight ratio and the ability to drive the car to it's limit. my civic only 197 whp and 136 ft/lbs but i can still run high 12s because the car only weight 2100 lbs.

 

torque is not a measure of force per revolution. it's just a measure of twisting power, it does not involve rpm. you can have torque with no rpm, just like when you're using a torque wrench. you can apply 50 lbs to the wrench but the bolt doesn't have to move. that's why you can't tell how fast the car can accelerate with just torque number. you need to know how much torque and at what rpm which is the definition of horse power. turbo diesel can make 500 lbs of torque but only 150 hp because of low rev, that means it can pull heavy load but at low speed. however, you can use a transmission to multiply rpm while reducing torque or vice versa. An engine with 100 lbs of torque at 10k rpm can use the transmission to increase torque while reducing rpm. What you really want in an engine is a flat torque curve.

 

No basically what he is saying is that he likes to use his uncorrected numbers from a dynojet so that when he wins, they feel bad about getting beat by a 300whp car, and when he looses, they don't talk **** because its a 300whp car.....

Scorke

 

it is deceptive at the very least....

 

Deceptive, since when was telling somebody false information regarding the power of your car being deceptive ? Unless you were racing or competing in a sanctioning body where there are power restrictions who cares if somebody tells you there car is making less/more power then it is?

People who are serious about racing (on closed road's ) don't come up and ask what power is your car making, they either know or don't care.

If he said his car made 240whp , and it did on some rare one of a kind dyno and he told everybody it made that much, and he smoked 350 whp cars don't you think they would figure it out quickly..... I am sorry just being deceptive about what power your car makes never seemed to be anything out of the ordinary, is there anybody else on here that thinks/feels that being told either incorrect or inaccurate dyno numbers regarding a car is a rare occurrance, I feel like it happens all over the world daily.


Scorke

 

im confused? was is like 300 degrees the day u got your car dynoed? why such a huge difference?

 

^ Doesn't elevation, humidity, and I believe one other factory play a part?

Scorke

 

The elevation we are at is crazy and throws the numbers all off.

I think everyone is concerned with numbers to a point. If you spend your hard earned money on a part and then strap onto a dyno and find out that the part yeilded no gains you are going to be pissed. When you are dynoing your main concern should be the tune and not the numbers, what's the point in making crazy power on a tune that's gonna hurt your engine.

 

I used my dyno runs to measure the change from stock to my current tune. Like others have said, there are so many ways to interpret actual power. I used it simply to measure the change from stock to tuned...just to see what the difference was after modding.

 

sounds stupid probably in all of your eyes., im more interested in hp and tq numbers then track times. just seeing what my car is capable of . im far from done modding my car but when i complete the mods i want im hopping for 360 to 400 hp. maybe then i'll hit the track to see whats up with the quarter mile time.

 

yes there is a flaw in your reasoning.

if you have a car that revvs to 20k rpm, if you had any idea what you are doing, you would gear it down a ton, and it would accelerate just as fast as a car with twice as much torque that only revved to 10k rpm. don't believe me? heres a video of our race car revving to 20k rpm. it makes only 23 ft*lb of torque at the CRANK. http://s2.photobucket.com/albums/y34...rnerflames.flv


here is something that is really interesting... you know all these claims that people are making 425 rwtq? well in first gear that is an appaling low number for an evo. in fact, it would crawl off the line slower then i can on my pedal bike using only 1 leg. NEVER say torque at the rear wheels. it is a meaningless number. when you get a chassis dyno printout, the torque is the calculated torque at the crank based of the hp measured at the wheel. torque measured at the rear wheel would be much much much higher because of gearing. it would also be dependent on what gear you are in, what size rear tire you are using and what your final drive ratio is. hopefully that has clarified it a bit.