Dynos can be tricky things. I have one for my car that registered 204rwhp, completely stock. But who knows how it was calibrated? Or what effects the weather had? Two different dyno charts from two different machines on two different days really can't be compared - too much can be different. I can see the hood thing having an affect, but again, who knows?

The best thing to do, I think, would dyno your S2000 and somebody else's back-to-back on that machine. Or, do back-to-back runs with your own car with and without your mods. Absolute numbers aren't the issue - changes from the mods is the important aspect.

 

I'm not a gas expert, but I've seen consistently lower dyno number reported from cars in California. Could it be the gas used here is only with 91 octane as opposed to 93/94 in most other parts of the country?

I dyno'ed my car in Boston when it had only 900 miles with 197 HP and had the 2nd lowest output of the 10 cars there. The only exception was a heavily modified car with 165 HP! He returned the car back to stock and all things went back to normal. Go figure!

Now I just need to dyno my car here in Cali and see if I still get 197 HP.


/Rog

 

Do the results of the Dyno take into account fuel temperature, air temperature, fuel densitiy, and altitude?

 

Besides the different effect of mods on the dyno, I'm interested in finding out if break-in procedure and odometer reading might effect dyno results. According to Honda, break-in continues on this motor continues well past 5K miles. The motor will probably perform better once it "loosens up" a bit.

If you don't mind, I think it would be interesting if the folks dynoed would post their odometer reading and a narrative regarding how hard they ran their cars in the first 600 and first 5,000 miles. I'm speciffically wondering if babying a new motor to much doesn't have a negative effect on performance.

 

[QUOTE]Originally posted by spider
[B]...The only exception was a heavily modified car (the owner of that car shall remain nameless...

 

the s2000, just like the type r (used to have one) are very temperamental cars. EVERY Car is different. the rule of thumb with a Honda motor is that 15% will have more power than expected, 70% will have the proper amount, and 15% will have less than expected. Many many factors come into play when seeing what the power output is.
YES, how you break your car in has a lot do do with how the car will run. These cars get quicker by being pushed, Not abused, but pushed. Honda's are not like other cars, every motor has its own personality.

I know many friends who have type r's, all stock. they all dyno'd there cars on the same dyno on the same day and the difference was over 10 hp between a few of them. why? different driver, different feel, the car was made on a different day, . Just because 2 people have the same car, it does not mean there cars run the exact same.

Its like mods........ some mods yield better gains on different carts than others, even though the cars are identical.

The best advice I can give you is be happy with your s2000, and don't let dyno numbers from one place on one day get you down.

 

[QUOTE]Originally posted by spider
[B]

I dyno'ed my car in Boston when it had only 900 miles with 197 HP and had the 2nd lowest output of the 10 cars there.

 

Responding to the request for odometer readings and break-in history: mine had just over 6k when it was dynoed yesterday. I broke it in pretty much according to Honda's directives, not V-teking for the first 600 miles, but immediately after that I was at Thunderhill with krazik driving the shit out of the car (and me trying to). Since then, I've autocrossed a few times, done another track day (at Sears Point), and done a lot of v-teking on the highway. So I definitely don't baby my baby.

cal

 

I dyno'ed at 211hp stock... go figure

 

Also responding the the request for dyno results and break in procedure correlation:

I dyno'd my car when it had about 4k miles. My peak run was 198.6 whp. The thing is that I completely ****ED up my break in procedure (the ASS that I was), because nobody had told me about it and since I was so RETARDED I did not read the manual for about a week after I got the car. So MUCHO runs up to redline, mucho clutch drops, and a top run of 125mph all within the first 300 miles. Then I read the manual and was scared out of my pants and took it easy all the way to 1k miles. I am at 8300 miles now, car runs great and no problems.

I guess my dyno result at 4k indicates that no major damage was done.