after getting them cleaned (all the carbon in the chambers and oil residue in the ports), springs checked (all are in good shape and can handle .625 lift, if needed
), the valve job touched up, and one valve stem tip polished (when the rocker arm failed it kinda bounced around on the stem just ever so slightly) and got them flowed.
So here are the stats: 1 set of 241 castings with stage 2 porting done by Cartek probably about 2/3 years ago....stock valve sizes. (2.00I 1.55E)
Intake: Exhaust:
Lift Ported Stock Gain Ported Stock Gain
.200 145.0 134 +9 111.2 104 +7.2
.300 202.4 189 +13.4 147.5 136 +11.5
.400 244.7 222 +22.7 179.2 165 +14.2
.500 270.0 240 +30.0 196.0 179 +17.0
.600 287.7 252 +35.7 207.7 185 +22.7
So I was pretty happy with those numbers and I'd say Cartek did a pretty good job. I have no intentions of having additional port work done, but was curious what kind of gains a "Stage 2" port job would yield. So if anyone is looking to compare numbers, here is some real world data for ya.
The flowbench was a Superflow 600, which I think is the industry standard, and the test was at 28" of H2O. Bammann Racing (located in Imalystown, NJ) did all the clean-up and flowbench work.
Now its time to put it all back together.....
Chris