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Old 11-07-2019, 09:21 PM   #16
nitrolx
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Default Re: Big Nitrous, if you miss A/F ratio, better to miss rich or lean?

I think a lot of the perceived issues from the tune swinging lean is if the tuneup is on the rich side to start with, and hence heavy on timing to try and clean that rich tune up. The rich tune is letting you get away with the excess timing, and then when it goes leaner with all that timing in it, it'll hurt it. But that's the excessive timing that hurts it; not so much the leaner AFR.

If the tune is fairly clean and not being overtimed to start with; swinging lean will be less likely to hurt it.

JMO.
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Old 11-09-2019, 05:05 PM   #17
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Default Re: Big Nitrous, if you miss A/F ratio, better to miss rich or lean?

I started a thread called, (I got lucky last night ) back on page 16 about this subject when i forgot to hook up the fuel line and made a pass which was my best pass ever and didn't hurt a thing , All the replies were very helpful.
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Old 11-09-2019, 09:19 PM   #18
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Default Re: Big Nitrous, if you miss A/F ratio, better to miss rich or lean?

Quote:
Originally Posted by nitrolx View Post
I think a lot of the perceived issues from the tune swinging lean is if the tuneup is on the rich side to start with, and hence heavy on timing to try and clean that rich tune up. The rich tune is letting you get away with the excess timing, and then when it goes leaner with all that timing in it, it'll hurt it. But that's the excessive timing that hurts it; not so much the leaner AFR.

If the tune is fairly clean and not being overtimed to start with; swinging lean will be less likely to hurt it.

JMO.
Exactly 100% what we have learned sir.
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Old 11-09-2019, 10:13 PM   #19
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I have found if we have an optimal tune and we rich it up by 5 to 10 pph of fuel. It barely if any slows down and is more forgiving to weather swings from early evening to later on. If we are lean as takes to make power and weather swings even if we take out timing it kills ring tension sooner. Again talking high pph and 2 or 3 kits etc.. honestly when using that much nitrous you can hurt stuff anyway. I agree with the low timing and lean tunes, but when we richer up the optimal tunes a bit rings last longer and nothing gets hurt. Mostly on small blocks also.
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Old 11-11-2019, 01:50 PM   #20
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Default Re: Big Nitrous, if you miss A/F ratio, better to miss rich or lean?

From my experience too lean will hurt ring lands on problem cylinders much more and will kill ring tension and ring roundness.
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Old 11-12-2019, 09:07 AM   #21
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Default Re: Big Nitrous, if you miss A/F ratio, better to miss rich or lean?

I'd dang sure rather be on the rich side than too lean
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Old 11-12-2019, 09:59 AM   #22
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Default Re: Big Nitrous, if you miss A/F ratio, better to miss rich or lean?

What came first the chicken or the egg? This debate will never end, anyone want to discuss how to check pinion angle? lol
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