Who can spot the difference in these Dyno's

[GoldCoastDC5R]

Below are three dyno printouts as follows

Initial Tune - Custom Intake Manifold (there was also a dyno run at toda with the JDM Intake manifold back on the car yet untuned and the car made 151.x kW but was running lean up top hence the touch up tune below - dyno 2)



Touch up tune (which was done from scratch for some reason?? )after changing from Custom Intake Manifold back to JDM Intake Manifold 29/7/06



Dyno Comp - No change to car from previous dyno run - For you info it translates to 143.1kW



So who can pick the differences?

[Wlee2]

well im not tuner.. or nething so reading dyno graph not my thing..

but i did notice that the last one was Run in a different Gear since the top speed is far lower than the other 2..

quite posibly 3rd gear on the last dyno.. and 4th gear for the top 2?

Like i said im just guessing.... you wondering why the readings read different even though your car was never changed ?

[GoldCoastDC5R]

Yeh just after opinions on why there is such a big difference. I am going to be putting my car on a dyno this week sometime for another run just to confirm...

[fueltank]

Your ramp rates, intake temp, ambient temp are all different.
Would this be why?

[Wlee2]

well using gear ratio Spread sheet.. on 4th gear Type R DC5 (assuming stock gearbox)

with 215/50/16 Tyres.. should reach 170.37 Km per hour at 8400 RPM..

i just wondering maybee the very first one seems to Goto 193 Kmph and still looks like it could continue..

Your 2nd dyno Graph looks like it clearly cuts at 170 km and was the only one labled with (4th gear) safe to assume its in 4th?

but the other 2 looks.. strange... first one starts to drop at 193 kmph.. 5th gear on a dc5 at 8400 rpm should be topping out at 212 kmph.

but your last one didnt show its top speed it just showed its peak power..so yeh.. but i guess that one was 4th gear neway..

Like i said before im not tuner .. but maybee different gears account for different power?

1st and 3rd dyno were done on shoot4.. but 2nd one was done on shoot 4f?
so technically the 1st and 3rd graph accordinig to dyno dynamics in shootout mode should pull the same figure.. but were done in different gears? (bear in mind 5th gear on the DC5r is the one closest to the 1:1 gear ratio)

ohh well best i can do ^_^ i cant help you on tune or why but ill tell ya what i noticed =P

[GoldCoastDC5R]

Your ramp rates, intake temp, ambient temp are all different.
Would this be why?

Well spotted - note in the second dyno the mode is 4F or 4 cylinder forced induction. The person tuning the car is supposed to be well experienced in honda tuning so you would think it would be tuned in the right mode

But the first and third dyno's are pretty similar consideing one was done in sydney and the other in brisbane. I will be going back to APC to run the car in the right mode and see what power it makes... to try and get a decent comparison

[GoldCoastDC5R]

Car was running 225/45/R17 on all three runs and all 50psi of tyre pressure for your info too...

[GoldCoastDC5R]

oh and the car revs to 9000rpm

from speedo does around 150kph in 3rd and 190kph in 4th....

[Wlee2]

oh and the car revs to 9000rpm

from speedo does around 150kph in 3rd and 190kph in 4th....

i goto ask then.. why did the 2nd Dyno cut of at 170?...

[dang]

Did you end up winning anything? Would have thought you would have pulled a much better figures.

You managed to get 13.9hp/10.3kw more than us.

We got 178hp on the same dyno same day with a stock JDM k20A in our civic.

[freakie]

Its because they are not running the car in shootout mode stipulations.

Shootout mode is 50psi tyre pressure and 3rd gear

Wayne, maybe its because Hondata has to smudge figures again to beat your power output? :P

oh just to clarify, your right Wayne, its obvious its different gears, look at the nm on the right side scaler

[GoldCoastDC5R]

Did you end up winning anything? Would have thought you would have pulled a much better figures.

You managed to get 13.9hp/10.3kw more than us.

We got 178hp on the same dyno same day with a stock JDM k20A in our civic.

Yeah i won the highest HP NA 4 cylinder award.

By Stock you mean Intake/Headers/Exhaust and Hondata? Or are you using the Standard Computer?

[tinkerbell]

i thought 4F = 4 cyl FWD

as a RWD has a tailshaft and rear differential to "lose" power through,

so 4F reads higher as there is less transmission loss?

[sangers]

i shouldve gone and run

[GoldCoastDC5R]

i thought 4F = 4 cyl FWD

as a RWD has a tailshaft and rear differential to "lose" power through,

so 4F reads higher as there is less transmission loss?

APC told me that 4F = 4 Cylinder Forced Induction... Unless their dyno tuner doesn't know wat they are on about???

I don't really think there would be different modes for front and rear wheel drive, never heard of that b4, and i dont think there would be any point, every car has different drive train loss anyways so a setting on the dyno is going to achieve anything...