NZHondas Dyno Results thread

[Green Machine]

strange that they did it in 2nd gear, should have been done in atleast third and normally 4th as the higher gear the more acurate the reading is im fairly sure. Also 94kws is damn low for an h22a.

[b_series_power]

94wkw fuck me look at the air fuel ratio though NEEDS A TUNE badly

[avinesh]

i made only 324kw today at king pin dyno day, had major wheel spin on the dyno...........at one point it made 460kw at wheels so we gave up an got the car off....should have had around 430wkw but just had too much spin

[Pdu-NZ]

Yea 94kw is pretty low for a H22A but it is auto, you will gain a bit more if it was manual.

For a manual they should do it in 3rd, since 4th will hit speed cut way before redline (around 6k or so), Auto (as he said it is) not sure.

As for the richness, Mine was the same, on a stock ecu they are programmed to just dump fuel in when Vtec comes in - hence the high a/f (mine blew smoke from unburnt fuel from 6k onwards). Getting it tuned and leaned out a bit will give it more power.

[Coupe-R]

Get a full exhaust system remove the cat, use a fuel controller to add fuel in the lean spot and take away through the rich areas.

will make over 100kw then no doubt

[Demon]

Heh forgot about this thread

Had mine Dyno'd last month (b18cr with I/H/E and a semi decent tune)
Heres the graph


136.3wkw without hte silencer in and 127.6 with
Done on Spec Performance rolling road dyno
Doesnt show AFR Read out but was richening up in the last 2000 odd RPM so with a retune should crack the 140wkw mark hopefully

[H22A LUDE]

Thanks for the input. Yes the car is an auto so the tuner had to run it in second gear unfortunately. I have added in fuel around the VTEC point (4-5k rpm) but I cant really just remove fuel to fix up the curve up top. When the car was on the dyno I asked the tuner if I could make some adjustments in between runs, he was cool with it. He told me it was running very rich up top and so I leaned it out on the Field fuel controller. At for example 6.7krpm, the air fuel ratio was 11.8:1 on the first run, I changed the settings on the Field from -3 to -7 at 6k rpm for the second run and this changed the air fuel ratio to 12.1:1 on the second run at 6.7k rpm. This was able to change my power from 107whp to 117.5whp. So through extrapolation, if 0.3 of an air fuel ratio can yield 10whp, if I hypothetically I leaned it out to 13.5:1, its a change of 1.4 in air fuel ratio. This should in theory then give an extra 40whp (1.4x0.3=0.42, thus the air fuel ratio is changed 4 times relative to the initial 0.3 change on the dyno, hence 10whp for 0.3 becomes 50whp at 1.4 from initial) extra, bringing the total to atleast 157whp at 6.7krpm. Im glad I made some notes of the air fuel ratio of the other runs at each rpm/speed, means there is hope for the engine, but for some reason it is smothering and or just getting way too much fuel above 6k. New straight through exhaust sounds like the way to go, but im just worried that there is some small problem some where (maybe a sensor etc) that is causing this and that it needs to be fixed first. Thanks for the input, I need to fix this, its just wrong for an H22 to produce double kw figures.....

[Demon]

Sounds like you know what your doing so shouldnt be to much trouble to get it all sorted, when tuned properly you should be around the 130ish WKW mark if not more

[H22A LUDE]

Hmmm had an interesting reply on honda-tech, the one guy said that the car is running that rich after 5.5k rpm due to it running so lean around 4k rpm. So he got me thinking that maybe, due to running so lean at the onset of vtec (14.1:1), the engine starts to run really hot (no fuel to cool the cylinders after the combustion stroke), and possibly some form of knock begins and the ECU intervenes and dumps in huge amounts of fuel as a protective measure? Far fetched maybe but it made some sense in my mind. For a stock ECU to reach 11.1:1 air fuel ratio at WOT is not right in any way, so a protective reaction may make perfect sense in this case. What I dont quite get is why the ECU doesn't just enter a form of limp mode (6.5k rev limit or ignition cut etc) if it finds itself running to lean at WOT. I may take the car for a run and rich it out to see if makes any difference.

[Horny_Devil]

youll probably find the ECU will adjust the timing if it indicates knock not add more fuel.

the ECU runs off the maps in it so its not going to deviate from them that much, maybe a little bit because the 02 sensor is still in there and doing what it does but its running rich because you have done mods to it to make more power. the ECU is still adding the same amount of fuel it always has but now with the mods it doesnt need to add that much any more.

you need to have the car tuned no 2 ways about it

[H22A LUDE]

youll probably find the ECU will adjust the timing if it indicates knock not add more fuel.

the ECU runs off the maps in it so its not going to deviate from them that much, maybe a little bit because the 02 sensor is still in there and doing what it does but its running rich because you have done mods to it to make more power. the ECU is still adding the same amount of fuel it always has but now with the mods it doesnt need to add that much any more.

you need to have the car tuned no 2 ways about it

Yea the retarding of timing would make more sense than the ECU sensing knock and it would explain why the power decreases and the air fuel ratio increases. More unburnt fuel not necessarily more fuel added.

You mentioned that mods make the car run richer and then in the next sentence you say ECU adds the same amount of fuel as always but due to the mods it doesn't need as much fuel? Could you elaborate on this please. Sounds like you mean that the mods cause you to get less air into the engine (which would be picked up by the MAP sensor (MAP voltage would decrease) and fed to the ECU), and hence the ECU needs to add less fuel (use a different position on the fuel/ignition maps) to normal because there is less air entering the cylinders? Wouldn't it be the other way round, the mods allow more air to enter at any given time (less restriction at the exhaust and less restriction on the intake to air flow), which will mean the MAP sensor will pick up more air (higher MAP voltage goes to the ECU), resulting in a different fuel/ignition position being selected by the ECU. This will result in the ECU causing the injector pulse duration to be longer and hence more fuel will be put into the engine all due to the higher MAP voltage due to the power modifications. Either way, the mods make the car run richer, and probably to the point that the stock ECU cant compensate correctly. Hence the need for tuning, especially in this case.

The ignition cut definitely sounds like the cause of the lack of power and the reason there is a richer air fuel ratio up top, same amount of fuel but its just not being burnt.

[Gudgen]

do you reckon we could have less jibber-jabber and more dyno plots?

[Horny_Devil]

regardless under WOT the ecu will be in the top 2 rows on the ecu maps.


start up a new thread and outline you questions/observations

[Jin]

1998 Mirage RS
Mods:
FGK Cat Back exhuast
Intake Pipe and Pod Filter
Earthing kit
Apexi SAFC

Tuned at ST HiTec

Has 104.7KW and 881.6Nm



---------- Post added at 11:43 PM ---------- Previous post was at 11:36 PM ----------

1995 DB8 SIR
Kms (more than you expect )
Mods
4-1 Xforce Extractors
2.5inch Custom Mide Pipe with TRR Twin Loop
Simota Carbon Fibre Whale Intake
Has Cam Gears (dont know why as came with car)
NGK Spark Plug Leads
Engine apparently had rebuild before but have no clue when

Tuned by Kent at Speed Source (Great Guy)

Peak Power 129Kw

[FUJ1]

Car is currently in at Speedtech Motorsports in Lower Hutt..

1997 Honda Civic Type R (EK9)

-B18CR engine out of 97 ITR..
-Buddy Club Spec 4 Cat-Back Exhaust..
-Hy-Tech style headers..
-Cold Air Intake..

Running standard ITR ECU..

Made 134kw at the wheels..


Getting tuned with Link ECU so will post up new results in next couple of days..

[jawdat]

H22a
153kw
stock internals
exhst,intake, and a bita clean

[pretenda]

Old Prelude BB4 H22A

DYNO: Torque (rolling road)
Gear Tested: 3

136.4kW at the wheels @ about 6700RPM
570ish Nm of Torque at the Wheels



Mods

Exhaust headers back
Pod filter and new pipe
Tune with VAFC II

Before Tune (124.2kW at about 7000 rpm)

[Gudgen]

Dyno sheets people! dyno sheets!

[d16a7]

aaand because im drunk il do it for you jawdat...

[jawdat]

NO NEED TO QUOTE THE IMAGE RIGHT ABOVE THIS POST

haha awsum thankss dude! much appreciate it

Old Prelude BB4 H22A

DYNO: Torque (rolling road)
Gear Tested: 3

136.4kW at the wheels @ about 6700RPM
570ish Nm of Torque at the Wheels

Mods

Exhaust headers back
Pod filter and new pipe
Tune with VAFC II

Before Tune (124.2kW at about 7000 rpm)

HOOOllly crapy man thats alota torque!!!

[Horny_Devil]

its a lot of torque because its at the wheels, and its an h22a

[jawdat]

its a lot of torque because its at the wheels, and its an h22a

still, you see all the n/a h22's and theyr around the 400 mark.. yea i guess bigger displasment = alota torque

[Demon]

u actually need to divide that number but i cant remeber what, u will actually have around the 150nm mark??, i could be wrong how ever

[Logger]

u actually need to divide that number but i cant remeber what, u will actually have around the 150nm mark??, i could be wrong how ever

Divide by final drive ratio

[d16a7]

^^^ easier said than done on a rolling road,

yeah sure easy on a hub dyno heck it even gives you the final drive ratio to divide by.