Timing

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03-19-2003, 10:14 AM

tsefreeflow

I'm Chillin

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Join Date: Oct 2002

Location: Phoenix, AZ

Posts: 194

Timing

In timing my 1990 300 I am wondering if there is and vacuum advance that needs to be disconnected when checking it. Does anyone know? Thanks

03-20-2003, 04:56 AM

drag_300japan

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Join Date: Mar 2003

Location: Atsugi, japan

Posts: 85

You dont set timing on a vg30.Its automatic!

03-25-2003, 07:52 PM

Jeff_94

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Quote:

Originally posted by drag_300japan
You dont set timing on a vg30.Its automatic!

No you don't actually "set" the timing but you can trick the computer and advance the timing by moving the CAS. I don't know the specifics but there is a good write up on twinturbo.net

03-27-2003, 07:51 AM

tsefreeflow

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Join Date: Oct 2002

Location: Phoenix, AZ

Posts: 194

Timing

Well, I did change timing by moving the cas I just was wondering if there was a vacuum advance or anything.

04-21-2003, 10:07 PM

Boosted_One

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Actually....by rotating the CAS you are setting what is called the "base" timing which is 15 degrees +or- 2 degrees.. The ECU makes adjustments from there(like a vacuum advance)....so if your base timing is off, your car will either be sluggish( timing below 12 deg.) / or you will likely detonate (anything over 18 deg). If it has never been checked it is a good idea to take a look. Loosening the three bolts on the cas and rotating it very slowly will either advance or retard your base timing.

All you need to be sure of when you check/set the timing is that the car is at full operating temp, and that all accessories are off(a/c,lights,radio...anything that drains significant current)

Hope that helps....