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Old 17-11-2011, 11:25 PM
rsrobin rsrobin is offline
Junior Member
 
Join Date: Nov 2011
Location: accrington
Posts: 3
Default Head totally mashed - should I run WI or WMI?

Firstly - a big thanks to Richard Lamb for all his help in getting my system up and running. The post sales customer care is excellent. He also made me aware of this very useful forum

At some point I will take some photos for an install thread.

Anyway, just briefly as its my first post, my car (bit dirty):









2003 Mk1 Ford Focus RS. She's largely used on track but is road legal. Max power/torque at 26psi is 355bhp/396ft.lb. This is pointless on track in a FWD car so I tend to use her largely at a more civil 16psi which is roughly 280-300bhp.

Anyway...

After spending hours browsing the forum I'm still unsure whether I should go WI or for a 50/50 W/M mix.

My main reason for installing the aquamist system was to help bring down EGTs which are currently scarily high. As I've inferred above, I'm not too fussed on power.

I run her on 99 RON fuel (pretty much exclusively shell v-power) She is live mapped prior to the aquamist being fitted. No knock, ignition etc spot on. The target AFR for the mk1 focus RS tends to be 11.5 - 11.8:1. A little richer that the ideal I've read here but the rationale is that these cars have no knock sensor (hence the 99 RON fuel also). However, at this ideal AFR the EGTs were too high. More fuel was thrown in for cylinder cooling - crude and my tuner isn't happy, but it was a stop gap until I sorted this - so she is currently far far too rich at 10:1 on my AFR gauge. However, EGTs still get scarily high on consistent full load - I once saw 950degC hammering up the kemmel straight at Spa-Francorchamps

Obviously, now I have another means to cool her she'll be going back for the excess fuel to be taken out and lean her out.

So...

with a little background on what I want to achieve and how the car operates, would WI or WMI injection best suit me and the car??

Many thanks

Robin
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