question about dynos
 

Friday i ran my friends modded c6 z06 on 17lbs and pulled by a car. Later on i took it to his dyno where he made 498 and i figured what the hell and dyno'd the car and i was surprised that it made only 448 on the same pounds (if you look at my signature i did 478).


The dyno where i tunned at (for the 478) was a portable one that you lay on the ground with a ramp to roll on the 2 dyno wheels that go between my rear wheel, the one where me and the z06 did was a actual dyno jet with one wheel under the rear tire.


so different dyno's really make different #'s? is it the wheel used on the dyno? Or maybe the computer?

All types of dynos will give you a different read out most likely. Dyno Jets are very accurate though from dyno to dyno, it was explained to me why at my local dyno but I cant remember all the specifics. The only real way to compare #'s is to have the same dyno type.

Im just happy that you pulled on a C6 Z06 with 450rwhp.

I pulled on one just messing around in second gear and im running a little less (no dyno yet, but an educated guess).

Darkphantom... what are your mods?

(ps.. sorry for the hijack)

I understand dynos use diffrent corection factors. I have dynoed on a dyno pac at 420 at 16 lbs. and dynoed 403 at 20 lbs on a superflow! I was disapointed and wondered what was wrong but after checking et calcutator at the 403 h/p my car ran within 1/10 th of the listed time. I run 10.8-10.9 at 403 h/p if i had 478 h/p it would be close to 10.2-10.3. So if the h/p does not match et's the dyno could be wrong or your a lousey driver! Someone should know more about this as i would like to know!

/\WELL i wanted to dyno where the corvette dyno'd cause i was wondering how come i have almost more power than he did but he stilled pulled in the beginning!
supposed to take it to the track but i spin pretty bad! how do you hook to run that low?

thanks, the c6 z06 isnt stock btw. HES MILD BOLT ONS (vette makes498 on the dyno that i did 448).


i have alot of stuff on the car T78, 50mm wastegate, hks ss bov, 550cc/1600cc injectors. Aeromotive 1000 fuel pump, Msd 6al, 2 blaster coils, 8.5mm wires, greddy profec b controller, Upgraded throttlebody for the spool, greddy 3 row intercooler, r1 dual oil coolers, waterwetter w/water, 20w50 castrol. automatic 3.9 final gear, apexi power fc, i have more but thats all i know for now

Run a set of 10.5 et streets at about 15 psi air pressure and play with the launck rpm's until to find were it goes and dosent bog. For me its about 7800 rpm's. Its confusing when you dyno 403 h/p but run this well it makes you wonder if everyone with big h/p numbers are right or if your just good with a good package. Dont get me wrong im proud of the car but im not bragging im just confused!

well the more power the more you will spin, its a given fact

dude, you still lying about pulling me, well i guess if you count when you JUMPED me and had that car length lead then i cut it to a half car, but we had to brake(you fucking lucky)....how come you didn't tell your cheerleaders the second run where we took off at the same time, and somehow your car died off at 130, i was ahead by half car....hmmmmm

Why the hell do you have 3.90's? Perhaps thats PART of the reason your car falls on its face in 5th.


Also, your stories are all confusing and way to different for me to believe, so I'll just say good luck in one day pulling the vette.


BTW, White Z, AWESOME car!

:pokeowned again darkphantom

dynos read differently because they're actually designed and built differently. there are a ton of factors that go into them and the numbers they produce. that's why the only way to compare your numbers is to do it on the same type of dyno.

well they do build dyos specially tuned to dyno certain cars. depending on wat type they are, they can give you dramatic results

example: most common one-mustang dynos

thanks man....:)

You guys over in the US always seem to get higher dyno figures than over here in the UK, even with identical mods on our cars...

e.g T04R on a street port with FMIC, De-Cat, 550cc & 1680cc inj, in the US making 450rwhp, would probably only make 400 rwhp at 15 psi in the UK...

No problem :bigthumb: In fact, I'm pretty sure that my next car is going to be a C6 Corvette, once I'm in the Navy.

Dynojets are usually really accurate because they measure horsepower directly (work done over time), then they back out a torque number using the rpm. Basically they're just a weighted drum, they know how much it weighs, and they know how much work it takes to make a change in rotation speed (acceleration) of that weight. There's no calibration or anything like that involved unless you start trying to compensate for altitude, temp, etc., basically trying to normalize results for different environmental conditions.

The uncorrected numbers from any Dynojet are usually dead-on accurate in regards to what your car did at that time on that day at those conditions.