Yup. Exactly correct. The SAFC-II gives you 12 points (4 more than the
older SAFC)...along with two different data files (programs so to say)
so you can switch from "street" to "race" curves. And...it can be done
on the fly.
- Bernd
-----Original Message-----
From: owner-dakota-truck@bent.twistedbits.net
[mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Tim Berry
Sent: Thursday, April 03, 2003 12:01 AM
To: dakota-truck@dakota-truck.net
Subject: Re: DML: #24 FMS Injectors
The SAFC I have has a high and low throttle setting, and you set the
curves per throttle percentage, say, your low is set at 0 and high is at
60% and your curve is -10% at 3000RPMs, low throttle, and +30% at high
throttle. You happen to be at 30% throttle, its correction factor will
be +10%, it is not a set % per RPM or throttle, it will caculate the %
needed as per your tuning curves... not a sudden change...
http://members.cox.net/coolva1/safc.mpg
I have it on the neon to just play around w/ it while the truck is
gettin worked on.... the video is shakey, but if you look at the bottom
reading, that is the correction %...
I understand what you are saying, but I think w/ the SAFC you'll get it
pretty darn close... 8 points of adjustment, from 1000PMS+ (under 1000
will give you correction for what the 1000 is set at)
I mainly got it for using bigger injectors and a big cam.... (I'm sure
you know the darn MAP sensors suck when its time for a cam and idleing)
Tim Berry - Chesapeake, VA 97 Dakota CC 360 Auto 4300lbs best ET to
date: 13.03@103.76 355.8RWHP 395.2RWTQ 99 Neon R/T Daily Driver
> Part of the problem there is the internal maps in the PCM are 16 cells
wide
> as opposed to the 8 in that aftermarket box, so you don't get a clean
> overlay. The PCM will switch values twice for each ajustment point on
> the SAFC, so it will always be a compromise.
>
> Most of the stand alone controllers like the F.A.S.T., Accel,
Electromotive
> also work on 16 cell wide tables(32 in some of the latest stuff). At 8
cells
> this box is a bit too primitive, IMO.
>
> The factory maps are also not linear, another curve ball in the
> picture.
If
> you set that thing up to change at consistent 500 rpm increments, the
> mid-range will likely be a mess due to the mismatch.
>
> Bob
>
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