Allpar Forums for Chrysler, Dodge, Jeep, Plymouth, and more: ADVANCED TIMING - Allpar Forums for Chrysler, Dodge, Jeep, Plymouth, and more

I have been hearing alot of people talking about advancing the timing on the N/A's but I dont know how to do it. I would appriciate anyone taking the time to let me know how to do this.

Thanks,
-Paul

You sent me a question about a cold air intake. I did it on a Turbo model. Sorry bout that. I have no idea how to bypass the fuel pressure regulator on an N/A

customdaytona86, on Dec 25 2002, 10:30 PM, said:

If you know whow to set your timing to the factory 12^, your 99% there!
Just keep adjusting it until your at 14^ which is "unofficially" considerd the max you'd really want to set it for.
What 14^ will do over 12^, give better low end throttle response & better highway cruising mileage for N/A or forced induction cars.
Downside, around town mileage will be less. For a forced induction car the downside is the increased risk of detonation under boost which leads to piston cracking.

If you don't know how to set timing, eitehr have someone do it for you or:

Run car to normal operating temp, loosen distributor, unplug coolant sensor in waterneck, using a timing light which you attache to #1 spark plug, aim at little opening (window) on top of tranny wher it mates to the block, turn the distributer (very little) until the timing mark aligns to 12 or 14.
Tighten distributor, check to see that mark hasn't moved, shut off car, plug in coolant sensor, disconnect timing light, done.

I have read when the head is shaved, it is like retarding the timing a certain amount. We would need to take this into consideration when advancing the timing?

Scott

ssheen, on Dec 26 2002, 10:45 AM, said:

Yes , timing is a bit on the before side with a head milled.
Cylinder CC's are reduced, base compression goes up & advancing timing or upping boost becomes a dangerous game when it comes to a turbo car.

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I really don't know the answer to that.
What I do know is that with my head that was shaved .020 before I got teh car, the max boost I could run before detonation was 16 psi, & that was at 10^ of timing. 12^ wouldn't get me to 14^ before we heard the pinging. Installing a Felpro .020 head saver shim, & giong back back to 12^ of timing allowed me to run up to 20 psi of boost! That's roughly a 40 HP increase! N/A cars won't see that kind of increase.

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2^ of cam timing is about right for .020 being cut. Instead of cam keys, buy an adjustable cam sprocket from Gary Donovan: http://www.relentles...nder_heads.html go to bottom of page. Then instead of using a degree wheel, use a dyno & tweak the cam for optimum power. With the list of mods you sent me, a dyno is definitly in your future for some tweaking.