hey,,I put 320's and 335 cnc'd heads on all the time w/ cams in the 254-262° range w/ 10+-1 comp.:D

Trend .135 wall

fixed it for you,,your measurement would never fit in the engine.:D
those push rods aren't flexing.

That looks like a happy engine and must pull really hard with the one inch spacer. Pretty hard to find anything bad with your combo and you certainly did a lot of testing with intakes and carbs to get solid information.

Not a huge difference but it averaged 4 more ft/lbs and 10 more hp with the 1 in. Peak tq was up 7 ft/lbs. The 2 in. only outperformed the 1 in. the last couple hundred rpm. The 1 in. also brought the peak hp rpm down a little and peak tq rpm up a little.

That's a gorgeous chart.

I just put a couple more charts up with the different combos on the thread I started about the intakes so as not to sidetrack this one.

http://www.offshoreonly.com/forums/g...take-info.html

oops lol no I bought good parts for that reason.

Did you try tuning out that dip in torque at 3400?

I remember seeing a video you had posted of one of your dyno pulls. Im no dyno expert, but that was like the fastest dyno pull i had ever seen. What was the sweep rate ? If i recall , seemed like it rev'd from 3000 to 6000 in like a few seconds.

On mine , it was the opposite. 3000-6500rpm took a long time. Wanna say it was like 150rpm per second sweep. I found it quite nerve racking loading the engine that long and hard. My engines would never accelerate that slow in the boat.

What is your lsa? I forgot.