I am going to get a IACV reset done this week and i wanted to get my Ignition advanced w/ the consult 2. I am tuned at a 12:1 AFR and i am running Water/Alcohol injection(80%water/20%alcohol) with stock timming and 12.5 psi of boost. Would it be safe to increase my BTDC from 15 degrees to 17 degrees?


Thanks
Chris

 

i dont think it would be a good idea without a J&S although its good you have w/a injection

 

Advancing the timing of 2 degree, is supposed to give some good gain ( I heard 8-10hp ) I had the advance timing done on my 2k1 so far so good but I didn't dyno'd my car yet so I dunno about the claimed gain. I dont know the effect on a F/I car but my guess is the gain might be even bigger, but you can try and see how the car's behave.

 

I wouldn't advance the timing on a FI car.

 

The reason i think it would be alright is because of the w/a injection. That is the sole purpose of using it is so you can tune a leaner AFR and advance the timming

 

well i agree somewhat and youd proboly be fine but i just think id be safer not to but 2 degrees isnt all that much so you could try it and listen for detonation

 

I cant see why you couldn't advance the timing by 2 degree, if you have access to consult II that would be easy to test, otherwise I think some dealer charge 80-90$
I hade mine done for free.

 

Yea i can do it but i am just wondering if it is safe. Running 13 psi is alittle different than NA as far as timming is concerned.

 

is five horsepower worth a blown engine and alot of cussing? just get the j&s and there would be alot less worries. its kinda one of those things that you shouldnt ask people about because of the fact that there are alot more variables involved, and every car is different.

 

Yep, why take the risk for a few HP. You will be making well over 300hp and you will be traction limited anyhow. I would even be worried about running stock timing at 12psi regardless of water injection.

 

Why take the chance? If you are concerned about it I certainly wouldn't do it on the off chance that it might work and you might gain 5hp.

 

I guess you guys are right. Just trying to think of ways to squeeze some extra power out of my setup.

I think what i will do is wait on the J&S until i do the timming advance. That way i can pull timming above 9 psi which should be safe enough.

Thanks for the input guys

 

IMO, it is a very bad idea to increase the base ignition timing up on any FI car that did not come from the factory with an FI ECU. While you will gain some off boost throttle response and maybe a few hp OFF BOOST ONLY. You will not gain any hp once boost comes on. Most likely, you will lose peak whp.

It is a common falacy that increasing timing will increase power. Ignition timing should be set so that max cylinder pressure occurs at 15-20 degrees after TDC. This will make the most power. Lots of factors go into where you should start your spark to reach this goal... rpm, temp, octane, pressure, cylinder design, cylinder size, and probably a few others I have not thought about.

Advancing timing past this point will lead to power decreases and detonation increases.

Now with a good engine management system, you can tune for more advance off boost and then decrease timing advance as boost comes on (usually 0.75degrees per 1psi). NA cars will usually benefit from from bumping the base timing a bit because timing from the factory is usually conservative to account for poor gas, high temp, etc.

 

I think you would run in to more problems if you go this route just so you could get a little more hp, but I would go with the J&S, it is a must in any FI setup.