Originally posted by Mike Rietow: Norton is a sbc guy, he misspoke.
I didn't, Merlin max overbore is 4.625 per their website. One bad groove or ding, well your either at max bore or sleeving it. You also have more forging options on pistons under 4.600. More deck surface between cylinders etc, numerous reasons in my opinion.
So while you may not agree with a conservative approach its still a very valid point.
The FACTS and the TRUTH is you don’t race a 4.600 bore bbc that as has been said is the norm today with bbc builds for fast top bulb bracket cars as well S/ST, S/C, S/G, TD and TS. Further, I have been running 4.600 bore engines since 2013. Further 2, I wouldn’t run anything Merlin.
Offering 1st hand experience and advice based on 3 decades of on track proven performance
"if you guys are so broke dyck you can't buy USA made parts you need to stay the fuc at home that's the bottomline" ----Tim McAmis