[BUBBAS IGNITION]

Originally Posted by tubman

I agree with Ross, the Merc in my '51 Ford seems to like to sit at 2700 (which is 70 on the speedometer) and cruise; any more than that and it's OK but the temperature goes up 10 degrees after 5 minutes or so. As an aside, after I had some break in time on my 258" new build, I ran it to 5500 just to see what it would do. I think it would have gone more, but I chickened out. That's with reworked Edmunds heads, a MAX-1 with 185G springs, a Mallory dual point, and a 2GC.

Also, the reason Zora developed the "Ardun" heads is said to be that he thought the flathead was limited by it's restricted breathing and the engine could be made to produce more revs and power. I've always wondered what he thought about only three main bearings.

5500 wasnt in high gear was it ??