Abridged version.

06' Silverado ECRB 4x4 L33 5.3L. Started with 258/277rw with air intake and exhust. Then went to 293/299rw with a cam and to 330/325rw with last round of mods. Total gain for Heads, cam, and headers was 72/48rw

Had = 293/299rw SAE
Comp LSL 215/223 .604/.615 112+5
Air intake
Summit 2 1/4" dual tip exhaust
Plugs and wires
Home ported TB
9.9:1 SCR 8.2 DCR

Mods added = 330/225rw SAE
Cal Speed 1 3/4 LT's + 3" Y-pipe
Home "ported heads" basically a clean up.
10.5 SCR 8.7 DCR

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Well numbers are in and frankly I thought they would be a little better considering how jacked up the heads were, the extra flow I got, and the bump in compression. But I went from 293/299rw to 330/325rw. If you factor in 20/10rw for the headers then I got 17/15rw out of the heads. I was really expecting to get 25-30 out of the heads alone. I did run out of fuel at 5,500 though and started going lean to 13.5 afr or so. The injectors were maxed at 5,000, hung in there to 115% duty cycle at 5,500 and gave up. The power basically stops climbing at 5,500 even though it pulled to 6,300. Plus I had to do about 15 freaking pulls to get both the VE and MAF tables correct. Started loosing power with the MAF hooked up no matter what I did. I was down 5/5 with the same AFR and timing. Had to add 2* through out to get the numbers back up to with in one or two of the SD tune. Got to check some things but I think I could have gone 335-340rw for sure with the fuel and a cool trans and motor. The other wierd thing was the dyno correction factor. It was the same as last time but was 8* hotter and 15% more humid. Not sure how that works. Any way uncorrected numbers were 346/335rw. They are what they are. I will get a graph up when I can get it on my Photobucket.

I did a light clean up on these heads because the exhaust valves were jacked up. Polished the chambers, cleaned up the bowls, took out the rocker hump, three angle valve job, and 30* back cut on the valves. Here are the numbers.

INT........Stock 243's........My 799's.......Gain
.100............70.8.................70.8......... ...0
.200..........138.6................151.9.......... 13.3
.300..........191.7................215.3.......... 23.6
.400..........236.0................253.7.......... 17.7
.500..........265.5................277.3.......... 11.8
.600..........265.5................262.5.......... .-3

EXH
.100...........60.4...................62.6........ ...2.2
.200.........107.4.................110.6.......... .3.2
.300.........139.0.................159.6.......... 20.5
.400.........164.3.................183.2.......... 18.9
.500.........176.9.................197.5.......... 20.6
.600.........180.1.................203.8.......... 23.7