SR Timing?

[AdrenalineS14]

Hey all, i just got the mechanical timing dead on, checked my timing with a timing light and adjusted the CAS to 15 degrees TDC, it was barely off before the adjustment. My concern is that on the Power FC it averages at 15 degrees switch is great, but bounces barely +/-..... ill see it jump around at 13-17 degrees, my idle on the FC runs around 850-low 900s im guessing i prob need to mess with the IACV screw to get it at the 800-850 mark or maybe im fine but not sure... just wanna hear from you knowledgeable guys out there if im in the "norm" or if everything needs to be precisely dead on with everything, im getting it tuned next week and wanna make sure everything is smooth on my end adn to make as easy as possible for the tuner to tune my car... btw its a SR20DET thanks in advance:bow:

[cotbu]

Not saying your timing is correct or anything, but the fluctuating timing at idle is normal. Think about it, there would be no need for timing mode if it was always steady.

[AdrenalineS14]

Not saying your timing is correct or anything...

what do you mean... is my stock timing incorrect?

[Sil-Eighty SE-K]

as long as the light says what the PFC says at the same time youre good....

dont use the "timing loop" ive chased my ass on those for so long RB, sr, doesnt matter
make a wire from coil 1 to the plug and use that for inductive pickup instead of the loop
ive found the loop to be 10deg off on several engines.....
worst case use the primary wires to coil 1

[cotbu]

what do you mean... is my stock timing incorrect?
Damn! I said, I'm not saying your timing is correct or incorrect, as I did not set it! How am I supposed to know, if you timing is correct?
You questions was about the timing fluctuating. I answered it.

[AdrenalineS14]

Damn! I said, I'm not saying your timing is correct or incorrect, as I did not set it! How am I supposed to know, if you timing is correct?
You questions was about the timing fluctuating. I answered it.

haha! my bad bro, i got what you meant, and i do thank you for your help :D

[inopsey]

as long as the light says what the PFC says at the same time youre good....

dont use the "timing loop" ive chased my ass on those for so long RB, sr, doesnt matter
make a wire from coil 1 to the plug and use that for inductive pickup instead of the loop
ive found the loop to be 10deg off on several engines.....
worst case use the primary wires to coil 1

why does every thread about setting timing (on zilvia) suggest using a ghetto rigged wire to go between the plug and coilpack? the method used in the fsm is for a timing light that is designed to plug between the plug and coil, modern timing lights use a clamp on ammeter style of pickup and can read the timing off the #1 coil wire...unless you believe that the wires after the coilpack would have a different electrical frequency than the ghetto rigged wire setup everyone seems to suggest???

[4x4le]

Because it works great. Other methods seem to give undesired results.

To the op. I dont know much about pfc, but try to lock the timing somehow or set all the surrounding cells your operating in at 15 when your checking it

[AdrenalineS14]

locking the timing... how do i go about doing that? And yes using the modified spark plug wire works WAY better then that stupid loop... im using a brand new digital timing light and used the loop and spark plug wire and got a better reading using the spark plug method plus the FSM states and shows how to mod a spark plug wire to use as well.

[inopsey]

Because it works great. Other methods seem to give undesired results.

To the op. I dont know much about pfc, but try to lock the timing somehow or set all the surrounding cells your operating in at 15 when your checking it

yah it works great if you have a old style timing light, totally unnecessary otherwise. (btw i could not get the timing loop to work at all either) do you really think that a wire you ghetto rig between the plug and coil pack gives a different signal than the wire between the coil and ignitor? look up on how a clamp on ammeter works, this is your pickup on a modern timing light.

[4x4le]

I wouldnt say it works better, but it surely dont work worse.

My reason for setting timing is the same as the op's. And this is whats key, have a consistent way of getting the same results each time. Any time you have to remove your cas, or if you just want to check it at a later date after tuning you want to be able to set it back to where you had it set earlier.
Most important thing would be using the same method that works and gets the same results. The entire tune is based off the base timing.

[inopsey]

i totally agree with you. i had a timing issue a few weeks back and made a ghetto wire to check the timing but was unsure if i had set it correct(tps plugged in or not gave different readings.) after sorting out the issue of how the pfc is suppose to be timed (i called apexi for that) and having a few mechanics laugh at me for suggesting i read the timing with a ghetto wire, i went and checked the timing from the back loop, the harness of coil pack #1 and the ghetto wire setup between plug 1 ant coil 1. the harness of coil #1 and the ghetto wiring gave the same timing results while the loop did not.