Timing question and headers

[SF223]

I installed a set of headers on my 6 and now when I down shift, the engine backfires. Not much but kinda like a sputter with an occasional low pop (or so it seems from inside the car). I also noticed the milage has dropped significantly. All was fine with the stock exhaust manifold.

So I was told the timing needs to be advanced.

I advanced the timing by 3 to 4 degrees with minimal change. It's now sitting about 1 degree BTDC. Is it detrimental to go farther (ATDC) or should I be retarding rather then advancing?

Zach

 

[SuperMag]

Ummm, I think you have it backwards. To advance timing, you take it further into BTDC country...

 

[MustangSix]

True. Set it to 12 degrees BTDC and see if that helps.

 

[SF223]

hmmm.... aixelsyd :roll:

Thanks.. I'll go fix this later today.

 

[Anlushac11]

hmmm.... aixelsyd :roll:

LOL good one

 

[Anonymous]

I'm sure you have already fixed it now, just going to say that they were absolutely right and you need to be moving the timing UP. Where you move it to will be decided by the car - all cars run best on different timings (even two cars with the exact same upgrades), you'll just have to try different ones to see which one works best (when it is NOT on the best setting it will sputter, not accelerate smoothly, will hesitate for a second when you punch the gas, idle rough - or too high - etc.). You want her to be running a thousand in the shade. I would try from 8* - 12*