Posted by Jack
SAFC 2: Tuning tool
A quick generic tool to help pick tuning settings based on throttle / hi / lo points…
http://www.makemilk.com/pic_hosting/s1495/diy/safc2_install/safc2.xls
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I came up with the idea for the site to summarize some of my projects especially some modifications and things I learned - the hard/expensive way sometimes ;)
Anything you see here - please use at your discretion. I take no responsibility whatsoever for anything you see on this site or use from this site - i.e if you blow up your motor, set your car on fire, flying squirrel falls off a roof and starts keying your door, etc.
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Archive for the ‘Tuning – SAFC’ Category
Posted by Jack
SAFC2: Knocking set reaching warp 10?
Anybody that uses safc for a while may notice that knock values rise with temperature outside, especially with sun out. There are debates on how accurate the knock reading is – I think it’s alright – it did pick up some values when it run lean for for me so I added extra fuel and it’s been sitting at 0 (calibrated) so that’s good. As far as extreme knock values - some of it is due to hotter running motor but a lot of it has to due with the fact that SAFC 2 doesn’t do so well in the sun or heat blowing at it from the air vents.
In the picture above, I calibrated my knock already and it was showing value over 200 - my motor should have been shaking and choking – and it was pretty smooth. At first I was concerned about the knock level until I noticed how hot it got on the black bezel behind it in the sun. Since then – I’ve tested couple of more things to be sure – but yes – safc 2 (at least the knock value) is affected by the hot air. If I place safc 2 near vent and turn on some warm air, my knock level goes from 0 to about 10-15. In the direct sun, I got over 200 that time — so before you guys panic about your motor — make sure your safc is cool.
Posted by Jack
SAFC2 Settings for different mafs / injectors
Just some notes from diy tuning – please chime in and help if you got good ideas.. A bit of mickey-mousing going on unfortunately to get it running since each each setup is a bit different.
Based on KA24DE-T.. I found some cool things about safc 2…
Settings that worked…
I heard of 2 IN 5 OUT being the common one recommended. It didn’t work for me.
1) T25 / N60 MAFS / 370 cc injectors — 2 IN 6 OUT
2 in 6 out worked best. I’ve tried other settings but usually these caused the AFRs to dip temporarily into lean region before returning to around 11 when boosting. It looks like the MAF range wasn’t read correctly and this caused the issues.
My THR points are: LO 3 HI 32
So my low range covers idle and when I let off the throttle.
(going to post actual #’s soon)