Ecu Tuning With No Dyno Around ?

[robots]

I've spent countless hours trying to find a dyno over here(beijing, china). And No. There are no dynos around here. The only one available would be around 3000kms away from me and will cost me arm or more.

There are few options available: road tuning and vehicle speed testing rollers.

1)

Road tuning is the easy choice, but a bit difficult/unsafe task to do on the public roads. Also its hard to find that kind of long strip road with a few cars, and thats easily accessible.

And I don't get how could you load all the cells on the map on the road ? U can't keep the car at the same speed/accell. rate.

If I don't understand the concept of the road tuning, maybe someone will enlighten me a bit?

Like I got a factory map, then I've installed inj, z32 afm, bigger turbo. And control it with EMU.

How should I start mapping?

Run standard boost. Go to 3/4th gear? Make a 10-20% open throttle pull. And datalog the run. And if the a/fs are alright, do another run with 30-40% open throttle? And till WOT ? When the afrs would be ok. Try to add a few degrees timing advance?

More input on road tuning would be good.

2)

They got these vehicle speed test rollers. To test your vehicle speedometer accuracy or something. Probably similar to those rollers that are used to pass emissions test.

What if I go and try those rollers ? I've heard they can read as high as 160-180km/h max speed.

It would be enough for the 3rd gear pull. Also doing some engine tuning on those rollers would result in less rick of causing some stupid situation on the road.

Then is the load. I don't think u can apply enough load to the engine using this method. So it won't be even 70% correct with the real world road tune.

Really hope for some more input from the tuners here.

Thanks!

Edited May 8, 2008 by robots

[Ionos]

Road tune is your best bet, you'll need a wide band o2 sensor and knock sensor if your emu doesn't display knock already.

I'm not 100% familier with how the 'speed rollers' operate but from the sounds of things they would not be able to simulate the load required to properly tune as you have suggested. You could do light load tuning on them, but it's probably easier to do this on the road also.

Start looking for an empty stretch of bitumen!

Edited May 8, 2008 by Ionos

[robots]

I got a LM-1 wideband. And EMU can datalog AFRs and Knock also.

So any tips on road tuning ? What to start with ? How to progress ?

[Guilt-Toy]

I suggest you invest in a power fc and datalogit. This way it will be much easier to tune your car.

Connect your wideband to software so you can get a read out in a graph of the AFR.

What you can do is just do power runs in second gear untill you get the afr's right. then check in third/// Its going to be hard if there are no open roads. IF you had a power fc you can log a average AFR per cell and then adjust the map then re-test. The best option for you in this case.

If there is no dyno available road tuning is good but you need open road to test 4th gear.. 3rd at the least....