97 Eclipse GSX Timing

[whitetiger777]

Hello,
I've bean wondering about the timing on my 97 Eclipse GSX. My first car was a Miata, and with the miata if I advanced the timing from 10 to 14 degrees I got better performance. Is there a timing for the eclipse that is better than stock. Also how do you do the timing on a 4g63 engin? I've heard people talk about a plug that I am suposed to ground before checking the timing, but no one can tell me where it is, what it looks like or show me a pic. Any help would be apreciated, thank you.

[kjewer1]

The plug only exists on 2Gs in the 95s. Its by the battery with a brown cover. On a 2g with original cam and crank angle sensors you cant adjust your base timing. Its set to 5 degrees. If you move the cam angle sensor (on the 95-96 its behind the intake cam gear, but on 97-99 like yours you can see it on the pass side of the valve cover) the ECU will figure it out and base will still be 5 degrees.

IF you convert to a 1g CAS you can adjust base timing without the ECU knowing it. The loggers will still report timing thinking there is a 5 degree base. So if you advance it to 10 degrees, and the logger/ECU says 20 degrees, its really 25

Also note that the reason people that swap to 1g 6 bolt motors in 2gs get random misifre CELs that cripple the car is the 1g CAS. So if you go to the 1g cAS you need to do the BS POS hack job baro wire mod, or get DSMlink. If you have DSMlink you can use the 1g CAS, but then again, if you have DSMlink you dont have to change your base to adjust timing, lol


So the short answer is yes, you can change your base, but its a huge pain in the ass. With a turbo car you dont want tons of timing anyway. I use the stock ECU timing maps...

Hope that helps.

[whitetiger777]

Thanks for the info