I have a 92 350 z28 - what is the best base timing for this car? I have it set at about 12 btdc right now, just wondering what you guys think is best.

 

I'd like to know that also for my 82 Z as in my sig.

 

As high as you can get it. To much however makes it hard to start.

I'm currently running 16° base, w/Carb, Comp XE284 & MSD distributor. (My car is not a daily driver)

Don't confuse total with base. The total we want is 36-38, so unless you can use stop bushings, your limited to Total - Mech. Advance = Base. (Total timing, BTW is more important to producing the most power)

So I have a 21° stop bushing (Limits my mech. advance to 21°) set on my MSD, and my total is set at 37° (all in by 3000rpms)

Ron

 

I dont fully understand how all the advance works past base timing, but how do you change/limit the other timings that add up to the total?

 

eee I've never tried, but I believe they limit the advance with stock GM HEI is by using different shaped weights.
Don't confuse this with the springs either, cause what that does is control the advance rate, not total amount.

This might be a job to the ageing distributor Dyno machines. If you could find a shop that has this Dyno, or find out if there's any part number or aftermarket for these weights you might be in luck. Hopefully someone on the list can help???

On the other hand, there’s the not so cheap MSD distributor. I bought mine to run with my MSD-6AL for around 180-190 bucks new. These aftermarket distributors use stop bushings, which allows a good range of customizing. --that & I could go on & on, about the superiority of these distributors over stock. -- & they look good

Ron