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Aquamist 1S water injection is compelte - results>>
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Posted by sab (more from sab) on Thu, 11 Jul 2002 05:56:40 Share Post by Email
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Let me start at the beginning......
I run the usual mods in my 1988 900 Aero (the silver sled) with high boost (the list of mods can be read more in depth on my website). I had a problem when the head temp would get pretty hot (and ambient temp was high) and when running outside the "efficiency" of the mitsubishi TE05 turbo (probably above 16 or 17psi) which i put on a couple of years back. If i kept the boot in and tried to maintain high boost it would occasionally ping/pre detonate - The APC always caught it in time tho and reduced boost. This is even running RICH accordning to my a/f gauge through out the high boost... it still wouldnt matter and ping slightly. My boost on cold days was much better and a lot more stable.

Well the water injection has seemed to cure all sign of ping (even at 20psi) and it maintains such a smooth transition through the boost range its incredible. The car just pulls and pulls. I drove a mates 1996 9000 Aero with the abbott motorsport chip a while back and my 900 Aero performs very similarly... maybe no so much down low gusto... but still quick!

I did a little test after driving back from my mechanic's workshop - which is about 20km from my home... was on boost and having fun most of the way! Got home, popped the bonnet and I felt the turbo to intercooler duct... ouch! that was hot and unbearable to touch! I then felt the intercooler to throttle body duct that has the water injeciton nozzle in it (see pics) ... that felt warm only and i could leave my hand touching it! That kind of intake temp must be good for the engine having nice cool air going in! :)

My tech helped me out installing it - which we started on Saturday morning at his workshop and he finished it up yesterday... we ended up using a variety of sourced parts on top of the Aquamist kit - from an old HQ Holden one way valve (in line to pump to maintain pressure to a 1997 900S 3 way washer check valve - to stop the pump drawing air through the washer outlets! The boss that was welded onto upper i/c duct looks a treat too!
We tried the old C900 washer check valve and found it was useless... when pump was activated it was pulling both water and air (from the windshield washer outlets!!)... not good!

I have also sourced a methanol based washer fluid here called WURTH.... not cheap at aud$22 a bottle for 1 litre... but am going to experiment with percentages.

Below are some other pics i took:
http://www.tbp.net/sbsaabonline/waterinj_pics/wi_1.jpg

http://www.tbp.net/sbsaabonline/waterinj_pics/wi_2.jpg

http://www.tbp.net/sbsaabonline/waterinj_pics/wi_3.jpg

http://www.tbp.net/sbsaabonline/waterinj_pics/wi_4.jpg

http://www.tbp.net/sbsaabonline/waterinj_pics/wi_5.jpg

http://www.tbp.net/sbsaabonline/waterinj_pics/wi_6.jpg

Just thought id share the results, which are great!
cheers from down under
sab

http://www.tbp.net/sbsaabonline/waterinj_pics/wi_1.jpg

posted by 63.34.219...

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