Piston Ring Gaps | Bigger Gap For Nitrous?
Summary
00:00 | - Rodrigo's asked, I'm building a 4.6 modular Ford power plant using a stock rotating assembly but I plan on running a moderate nitrous shot. |
00:08 | My understanding is that I do need to give the rings a looser gap due to the additional heat produced by nitrous. |
00:17 | Is this recommended even if using a moderate nitrous shot? OK so generally yeah the rule of thumb is yes, if you are going to be using nitrous, it is a power adder. |
00:28 | Very similar in a way to forced induction, what we're doing is adding more oxygen into the cylinder so that we can add more fuel and we're getting a bigger combustion event. |
00:38 | So in turn this is going to create more combustion temperature. |
00:41 | And we do need to account for that. |
00:43 | With nitrous though, what we do need to sort of consider as well before you go and make a massive adjustment to your ring end gaps, is how much nitrous are you adding to the engine? How big physically is the nitrous shot, and how often do you expect to be running it? So on a street car it's probably pretty difficult to use nitrous for an extended period of time. |
01:04 | If you are building a drag car where we see nitrous used a lot, then using nitrous for an entire run down the drag strip can put a lot of stress on the engine and in that instance I certainly would be recommending that you consider loosening you ring end gaps slightly. |
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