Why pull timing?
Why pull timing? As the title states, why is it common to retard timing when using nitrous? What is it that you are trying to prevent?
With regards to dry shots, I have read that stock tuned cars can get away with no timing retards. Why is this?
Sorry for the many questions. Just trying to learn this before I put a dry shot on my H/C car.
Thanks,
Brian
With regards to dry shots, I have read that stock tuned cars can get away with no timing retards. Why is this?
Sorry for the many questions. Just trying to learn this before I put a dry shot on my H/C car.
Thanks,
Brian
You retard the timing because the extra oxygen in the nitrous increases the burn rate of the combustion mixture and if you have too much timing it will start detonating. With a small shot (100-150), you shouldn't have to worry about it.
Originally Posted by Matt@HSW
Unless you have advanced the timing considerably it shouldn't be an issue on a dry 150 or less shot, as the dry shot will pull a few degrees of timing.
Matt
Matt
I don't recall if any timing was added or not when the car was tuned. However, the cam I have right now (TR220) has 4* of advance ground into it. Do you think this would require backing off the timing?
Thanks.
Nope, the cam is valve timing, not ignition timing. The two are different. There aren't any issues with the cam grind being advanced any. There could be issues if more then a few degrees of ignition timing have been added. I’d ask the tuner and see if the ignition timing has been advanced any, and then if so, by how much.
Matt
Matt
Originally Posted by brians98ss
I don't recall if any timing was added or not when the car was tuned. However, the cam I have right now (TR220) has 4* of advance ground into it. Do you think this would require backing off the timing?
Thanks.
Thanks.
One comment on the advance vs. NA and Bottled Crack. I have tuned my car and others using the max advance before KR, back off a * or two and go (normally 31* max). But, I have ran several different nights on varying setups, with a further reduced timing, currently curves from 19* up to 24* and then slopes off some after 6200rpms through the 6800 shifts / 6300 on juice, and using this method I havent seen any change in MPH, ET or anything else, but I dont need to adjust when on the bottle either. I ran a 240shot dry, mixed in a couple gallons of 103 to a couple 92pump, and no KR.
Made runs NA, got my PB, made runs on 120shot dry, new PB, and a couple aborted runs on 240shot dry, aborted but nonetheless, no KR on any of them. Maybe adding a couple *'s NA might help a hair, but I see no need to run on the edge all the time.
GL,
Charlie
Made runs NA, got my PB, made runs on 120shot dry, new PB, and a couple aborted runs on 240shot dry, aborted but nonetheless, no KR on any of them. Maybe adding a couple *'s NA might help a hair, but I see no need to run on the edge all the time.
GL,
Charlie
