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
About me
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.
Otherwise - please enjoy the website!
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..
Based on KA24DE-T.. I found some cool things about safc 2…
Settings that worked…
1) T25 / N60 MAFS / 370 cc injectors — 1 IN 6 OUT
It liked only odd values for the IN .. so 1 in 6 out run good, 3 in 6 out run bit lean, 6 in 9 out run very lean. 2 in 6 out idled bad alogether. There was choice of running 3 in 6 out and adding fuel – for 1 in 6 out, I had to subtract about 2-4 points for most LO points on safc.
2) T25 / Z32 MAFS / 370 cc injectors — 2 IN 6 OUT
2 in 6 out worked best – 3 in 6 out worked but not so good – 4 in 6 out worked ok but leaned out, so there was choice of doing 2 in 6 out and leaning out the rich spots or running 4 in 6 out and adding fuel.
3) T25 / Z32 MAFS / 480 cc injectors
I jumped on these as I was doing 98% and spiking to 105% on 370 cc’s when hitting 13.5 psi.
Same routine - 2 in 6 out – major gun-like backfire past 4,000 if revved and let off.
4 in 6 out — still finding which works best.