Can you choose a narrower lsa or did you already buy the cam? 110-112 would be better in my mind especially that you boosted the curve already w your manifold mods. Then again your valve openings remain smallish so I can't be sure. A narrower lsa is simply what I would bet on at this point if it were I.The cam is listed as 197/203 114 LSA with 507 / 516 at 1.6 rocker ratio. Steve
I recall Bill Jenkins who proposed a tighter second ring gap on the 350 Chevy engine. It was later to be discovered that by widening the second ring gap, the top-ring seal is enhanced with minimal pressure present underneath the top ring.So we want to talk about Lobe Displacement angle. If going may as well go deep. A little light reading. Widening the angle reduces overlap. "All it does is make the engine much more drivable and is an easy way to allow a longer period cam without throwing away driveability ".I have been building English engines for a long time. In recent years there has been a shift to short duration high lift cams. Yep, high valve acceleration rates but revs held to 5000 or less.
Have you read any about a second compression ring gap 50 percent larger than the first ring gap produces more HP? Thanks for your input. I have no plans for a super charger make my HP on motor. Steve
Yes but the truck is not tuned as yet. And his exhaust is quite stifled. His truck may just be constipated.There are a number of factors involved in selection of cam center line angle, bore to stroke ratio, valve size, rod length to stroke ratio, port velocity and low lift valve flow. As we all know there is a very limited market for 3.9 V6 performance parts. I need to call the supplier to check on back ordered spring kit. I'll ask a few more questions about this cam. You are comparing larger longer stroke engines and are they running on the factory ECU? If I had something like a rat rooster intake and could run 13 to 1 and have a Cam 2 pump in the back yard we'd see what she could make. Trying to think out of the box but color between the lines. I stopped by the machine shop yesterday it seems everyone is busy but my parts were no longer in the drop off area. rather than pull anyone off a machine I waved and left. Rings have still yet to be made so the build slows. Steve