crossfire timing
Thread Starter
Racer
Joined: Dec 2007
Posts: 269
Likes: 38
From: So Cal
crossfire timing
Newbie question. I see in a lot of posts that people advance the timing from 6 to 8-12. Why? If higher is better did GM set it lower for emissions or why? What are the downsides of raising the timing?
Le Mans Master
Joined: Dec 2006
Posts: 8,837
Likes: 1,027
Emissions. Upside: Runs better. Downside: Gotta set it back before smog insp.
Le Mans Master
Joined: Jul 2000
Posts: 6,663
Likes: 162
From: columbia city in
to much timing can make it hard to start .and you can have pinging and knocking .to much knocking will give you reduced power.The knock sensor will reduce power.8-10 works best on my car.
Thread Starter
Racer
Joined: Dec 2007
Posts: 269
Likes: 38
From: So Cal
So no issues with 8-10? When you say it works best, what exactly do you mean? Thanks
Le Mans Master
Joined: Jul 2000
Posts: 6,663
Likes: 162
From: columbia city in
my car starts good ,performs good .no pinging or knock.go up 2 degrees each time and see how it runs.the gas that you are using can make a difference.factory calls for 87. my car likes a midgrade 89
Thread Starter
Racer
Joined: Dec 2007
Posts: 269
Likes: 38
From: So Cal
Safety Car
Joined: Nov 2005
Posts: 3,533
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
You should be able to get away with 10*-11*, but if it starts pinging, back it off 1* at a time until it stops. I run 20* on my 383, but it likes that much.
