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2 degree TA

2643 Views 16 Replies 11 Participants Last post by  woodb01
Had the timing advanced 2 degrees at my local Nissan dealer and I can't tell a damn thing different. I have 89 octane in the tank. Feels the same.
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A small timing advance without any other changes may not yield any results at all. Nissan and their ECU already optimize a-f ratio and timing. Depending on HOW they do the timing change the ECU may automatically RE-adjust back to stock.

If you have made ANY breathing mods (Cold Air Intake, CAI - Exhaust mods) then you might notice some difference together WITH the timing change. That is because better breathing means there is a small amount more charge to burn and bringing the burn on slightly sooner will make a little more power and possibly offset the gas mileage too.

Find someone who has a timing light and stick it on there to see what the timing is showing.
Here is my opinion based on my experience with both building engines and on my own personal Nismo...

A small timing advance on a completely stock motor will not do very much if anything at all. In colder weather it will help a small amount on even a stock motor because there is a slightly more dense charge that can be combusted more readily.

However, if you do any breathing mods, like a new exhaust or a Cold Air Intake (CAI) it can make quite a bit of difference. The freer your motor breathes the more advance you may need for it to run smoothly. In other words if I get more charge into the combustion chamber and make it easier for that charge to leave the chamber during the exhaust cycle then the charge may need a slightly sooner "burn" to use the charge more effectively. And it should help a slight amount with idle, power, and mileage.

The one caveat here is that if you manage to advance the timing too much you can cause detonation. NOT GOOD! Even with the ignition knock sensors to retard the timing it is still hard on the motor and damaging to any performance gains.

One last consideration, the effects of timing advance and breathing mods is DEFINITELY dependent on temperature and weather conditions as well. When it is cooler out your motor can deal with more aggressive timing, during hot summer months, especially in the SouthWest like AZ, NM, TX, or Southern CA desert areas those 110+ temps can be damaging with aggressive timing setups.

Just my 2 cents.


I've noticed GREAT improvements in performance by doing all of the following:

Custom Exhaust
Change out Fluids to 100% synthetics
Remove WOT restriction
SuperChips 87 Performance tune
2 degrees timing advance


I noticed more performance gains from the WOT removal than the SuperChips tuning. However the timing advance and a slight RPM increase (+25 RPM) did improve my idle quite a bit and I do notice a power increase across the whole power band but all the other changes made a LOT more difference.
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