Quote:
Originally Posted by mrx79
Hi,
i'am reading here for a long time, but never had the time to install/test my WI system in my car. Today i made some first testruns.
As a background: Engine is a Honda B16A1 turbocharged with a GTX2860 .48ar T3 Turbine, running stable boost of around 1.1bar on pumpgas (98 ROZ).
based on RICE RACINGs threads i decided to go pre-turbo injection.
Currently installed is a 350ccm nozzle. I run my 550ccm fuel injectors at around 80%dc at redline and at activation boost of 0,6bar they have aprox. 23%dc.
I run normaly rich mixtures (i know propably too rich for pure water) of lambda 0,8 under boost. Timing is normaly retarted. Aprox. 0,5?/psi as a rough guideline of how much retard i'am running.
My first tests where without meth, but i will try later. WI alone will give gains IF you are knock limited in your set up, otherwise it will generally cost you power, especially if you do not adjust your calibration to take effect of the water injection. My suggestion is try the different injectant fluid and report back.
Maybe someone can say something about my experiences:
- i lost aprox. 35hp with my setup. no advance or lambda changes. Just add water.
- with water activated at 0,6bar, my spoolup is delayed by about 500rpm later then without water.
- the overall boost i lowered (with same WG and boost controller settings) by 0,1-0,15bar
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These are all normal findings.
Some of the loss can be recovered by 'beefing up' your spark, even if you have no audible misfires I can gurantee you that it will be much harder to initiate combustion when running water injection on an otherwise optimized calibration for fuel alone.
All the other standard knowledge here applies, you will loose power when you run water injection at your Lambda, even if you go optimal of 0.92 you will still loose a tiny bit of power over the fuel alone set up.
IAT finding is generally correct, it will only have a noticible effect on lowering temperature if the compressor is worked hard or the IC is undersized.
This above is one of the reasons I changed to soley WM50 mixture as an injectant.
Hope this helps.