SPDST3R

... and everything seems to be working. Now I'm ready for the dyno tomorrow to set it up. One noticed though when I was checking the RPM on the S-AFC. It is not the same with the stock gauage. At idle, my stock gauage reads +- 750 while the S-AFC stays around 500. Is this normal or something is wrong with my stock RPM gauage? It hink 500 at idle is really low. Any idea guys?

JKBe30m3

Let me know what your settings are on yours because I have similar mods and I don't have a dyno close by.

I have also noticed the difference in rpm readings. I think that the S-Afc is more accurate because it is just a digital reading straight from the ECU but without the guage that could or could not be accurate getting in the way.

pp13bnos

iTrader: (1)

My s-afc is reads pretty close to idle, but way up around 8,500 its off a couple hunderd rpms. O-well. I trust the s-afc over the stock 12 year old tack. CJ

Scott 89t2

my idle is dead on but anything over 2000rpm is off by 200-400rpm.... the afc will be right.

SPDST3R

ok, i took her out for a spin and here are some reading comparisons:

750 (stock) - 500 (safc)
3500 (stock) - 2600 (safc)
4500 (stock) - 3000 (safc)

as you can see, it is over 1000 RPM off.

bcty

that is concerningly off... might wanna check that your S-AFC is hooked up right.. to be off by 1000 at that rpm seems pretty bad for the stock gauge..

SPDST3R

i had the cylinder wrong. it was setup for 6 instead of 4. So I put it to 4 and everything is now in sync

silverrotor

iTrader: (1)

When you say In sync, like 750rpm (stock) Is 750 rpm (s-afc)? If It Is, than you'll be the first to have matching tachs. I'll be Installing mine soon and am Intimadated to have a contrast with the rpms.

I'll post my results.

SPDST3R

yup, it's 99% sync all the way up. Now i can really tell the idle is not steady because the numbers are going up and down. But I noticed that the idle is smoother now. My idles used to move bet 700 and 900 and now it stays at 750'ish.

Aaron Cake

iTrader: (1)

I believe the S-AFC and tach get their RPM signals from different points...The S-AFC gets it from the CAS, the tach from the trailing coil. But I could be wrong (probably am).