Quote:
Originally Posted by SpeZ
2017 workshop manual says .037-.043" gap on stock LT4.
I am at 14.5 psi, .037" gap with the NGK 6510 and have zero issues wether cold or on track.
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There are so many variables in these cars, the fuel owners use, the oil they select and how these cars are driven. So sure... the NGK 6510s work for a lot of owners who simply hit a blast on the street or drag racing for a whole 8-10 seconds a clip on an engine that has been cooled down or whatever. The frequency of the owners who push a ZLE to the limits like Road Racing demands is probably less than 5% of ZLE production and maybe, 1-2% of ZL1 production. Yes, they will work... all the way until they do not. I have listed the physics, materials and risks versus rewards... what you do with that info is up to you.
Your profile shows you are in Europe... the fuel there is a base of 95-98 Octane RON which is far better with less additives than USA based fuels beginning with an 87 octane before additives and blending to achieve a best of 93oct. Its this lack of transparency where others get on a Car Forum and see posts stating "this works for me so it should for you..." that doesn't help the person looking to truly solve an issue with Geographical Data would completely skew the outcome.