Round 6...
After reading over the winter on cz28.com, and researching head porters, I decided on using Lloyd Elliot. He had a good reputation, and he was responding to every email I sent with indepth and unbiased responses. I sent him my original heads and he ported them for a total cost of $700. He also unassembled my old valvetrain and assembled my new stuff at no charge.
My new flow numbers were 271cfm/187cfm @ .550" lift. The flow sheet is below.
The valvetrain I used are the following:
Manley Raceflo 2.00"/1.56" SS Valves
CC987-16 Dual Coil Valvesprings 1.43" Diameter
CC730-16 Comp Cams 10 Degree Titanium Retainers
CC611-16 Comp Cams Valve Locks
CC4771-16 Comp Cams Spring Locator
I also added a Cloyes True Double Roller Timing Chain.
I also sold my SLP Shorties for Jet Hot Long Tubes (1 3/4" Primaries to 3" Collector). They primary tubes were significantly longer as you can see below. I decided to use a Mufflex 3" to 4" Y-pipe and a reducer back down to 3". This allowed me to hook up a carsound catalytic converter to the end of the Y-pipe.
I also added a 1LE Bellows from LS1Speed. My stocker developed a mighty big hole in it.
I upgraded to Taylor 8mm Spark Plug Wires so I can reroute them and also installed a CSI Electric Water Pump (I had the stock H2O) housing Powdercoated black).
I also added an Aeromotive Adjustable Fuel Pressure Regulator and had the fuel pressure at 55psi (richer is safer, especially when your running stock injectors). You can see I had my intake manifold powder coated black as well.
I then went back to the dyno with the same programming as before, but with the fuel pressure higher than stock as mentioned above. This was the first pull with the ZO6 MAF. I then made a 2nd pull (dyno002)with the stock MAF and lost 5rwhp and 5rwtq (the torque was throughout the rpm range). I put the ZO6 MAF back in and kept leaning it out (using the regulator)until I reached a peak (shown in the last pic). I actually hit 384rwhp. I leaned it out a little more and loss 1rwhp, but picked up about 4rwtq. This just shows that if I had my program leaned out, these results could be achieved. However, the PCM compensated for the fuel pressure change and I was back to the high 360's rwhp. The lowend felt soggy again.
I went to the track after the I lost the power. It was a street night and the track was wet! I had to totally baby it out of the hole:
60' 2.065
1/8 8.356
mph 87.72
1/4 12.802
mph 111.32
I went back to the track with no changes to the car at all. I went on a 50 degree day and sunny out. They prepped the track and on 3 out of 4 launches I bogged out of the hole. On the last launch I spun till 3rd. Here is my best ET run:
60' 2.074
1/8 8.231
mph 90.12
1/4 12.583
mph 114.10
Not a bad pickup in mph. Just goes to show you track conditions and weather play a big role. If I had the additional 15rwhp/17rwtq from the dyno (up to 35rwtq at low rpms), then I probably would have easily trapped 116-117mph.
