Timing 100 & 150 shot - C16
Timing 100 & 150 shot - C16 So I'll be heading to the track soon and will be upping my nitrous shot to 150. I plan to pull 6 degrees on the 150 shot at the track and will add timing as I read plugs. Currently spraying 100 shot with 4 degrees pulled (3k-6k RPM) - normal timing is 28 degrees. Just been doing street pulls and haven't found a good location to do a test run and pull plugs yet. Am I being too conservative by pulling 4 degree on the 100 shot with supplemental C16? Also, about how much power is each degree of timing worth on a 100 shot? Mods are in my sig.
This has turned into a big argument over the years on nitrous afr vs timing logic... Years ago the thing to do was rich and retarded, and guys would try to get away with being greedy on timing and bringing more back in, while leaving it fat. This is a good way to lift a ring. What a lot of big name nitrous guys have found over the past probably 10-15 years, is that you can run the car slightly leaner, say a few points richer than motor afr, but with plenty of timing taken out.. So basically in your case, say your car on motor is 28 degrees, at 12.5 afr WOT.... You may find it actually runs faster/cleaner, with 4 degrees out and a low 12/high 11 afr, than you would with the afr deeper into the 11s with the same timing out of it and the plugs will still show being safe.
Summed up, don't worry about having too much timing taken out. Just make sure it is not too fat and the motor will be just fine and run great.
Summed up, don't worry about having too much timing taken out. Just make sure it is not too fat and the motor will be just fine and run great.
This has turned into a big argument over the years on nitrous afr vs timing logic... Years ago the thing to do was rich and retarded, and guys would try to get away with being greedy on timing and bringing more back in, while leaving it fat. This is a good way to lift a ring. What a lot of big name nitrous guys have found over the past probably 10-15 years, is that you can run the car slightly leaner, say a few points richer than motor afr, but with plenty of timing taken out.. So basically in your case, say your car on motor is 28 degrees, at 12.5 afr WOT.... You may find it actually runs faster/cleaner, with 4 degrees out and a low 12/high 11 afr, than you would with the afr deeper into the 11s with the same timing out of it and the plugs will still show being safe.
Summed up, don't worry about having too much timing taken out. Just make sure it is not too fat and the motor will be just fine and run great.
Summed up, don't worry about having too much timing taken out. Just make sure it is not too fat and the motor will be just fine and run great.
Okay. This is helpful and I will bear it in mind as I tune at the track. I am curious though if there is any upside to not pulling as much timing. Seems that I have seen alot of setups running < 8 degrees on a 200 shot on C16. I think i have a very tight tuning window since I am running .035" quench so I will probably not temp fate too much. From what I gather, there is more room for error in the fueling than in the spark.
