Yep, and I disagree with that. I have never seen any SBM or chevy or Ford with conventional OE chamber geometry run timing that low. Unless the guy runs 3 ranges too hot a plug. That is a tuning tool used by some to rub their dicks and make people think they are cool because they run under 30 total. Seen it on the dyno on customers engine. Sent it home wit th e plug in it I wanted, and it came back in the car with a different plug. It had been tuned by a guru.
It was down on power and wouldn’t run over 28 total. Liked less. I’m thinking WTF??? It took 34 when it left here. So he pulled a plug and you could have welded with the damn thing.
So I went and pulled his build sheets and his invoice and sure enough, he signed off on not touching the tune up until it came back in, including the plugs.
BTW, it came in because he was beating the **** out of the bearings. No doubt, his use of glow plugs was an issue, and like a dog returning to his own vomit, he went back to them because his guru said that 34 is too much total.
Put the correct plugs back in it, and it went right back to the HP it left with and 34 total.
So I haven’t seen these super fast OE chambers.
