ive heard of wanting to retard your timing in order to shoot nirtous or whatever but why would you advance your timing?

 

Advancing your timming gives you very moderate power gains, but only on the bottom end. Your top-end wil suffer a bit from it. It just detonates the air/fuel a split second earlier in the combustion stroke.

 

you'll want to run premium fuel if you advance it also...

 

i gained 5kw at the wheels going from 12 degrees to 18.5 degrees.

stupid **** of a mechanic had retarded it heaps.

 

Be careful though when toying with your timing.
Advancing it will give more power at the higher end of the rpm band, but it will also create more heat. The more advanced you go, the more heat you create.

FYI, I was toying with my timing recently, and found some good gains when I went to near 8-10deg advanced. However, my EGT's had risen to 1600deg a lot faster than when the timing was advanced by 3-5deg.

You have to decide for yourself, is the damage you're doing to your motor with the extreme exhaust temps worth the extra 3-5hp?

 

What the F**K are some of you guys talking about?

1. Do a search...many threads on this.
2. If you want to play it safe, just take it to maximun factory spec(usually 18 degrees on an Integra)
3. Usually good for 2-5HP across the board...no top end suffering
4. If you stay within factory spec no better gas is needed than whatever is reccommended.

If I wasn't too lazy I'd scan some dyno sheets I have of various timing advances and their gains.

 

basically when you advance your timing you are just advancing your spark timing. when the pistion is at TDC air/fuel is mixed in the chamber and you have combustion. by advancing it you are creating combustion 8, 6, 10, 12, etc.....degrees before the piston reaches TDC or as we know it BTDC. you are just creating more resistance on the piston head as it comes up, which allows it to be thrown back down the cylinder at a faster rate than normal. the piston is therefore working harder as it takes the explosion and compresses it as it comes up which increases cylinder pressure, which in turn increases your HP.

oh and usually you can only get away with 18 degrees BTDC. this is agressive as you want to get. rule of thumb is advance degree by degree untill you hear knocking at idle then retard it 2 degrees from that point. just remeber we dont have knock sensors on the LS, GS, RS blocks, so dont push it, cause sometimes what you cant hear can hurt you.


[Modified by Jspd, 5:10 PM 1/15/2003]