TDIsyncro
Veteran Member
Congrats Travis. It's good to see it back running again. Engine is sounding great. 250 miles already! Soon you will have first oil change and can start pushing it more. I look forward to seeing what the build will bring power wise.
A few comments for other peoples benefit. The valve train design was an interesting undertaking. Part of the process was putting a set of Colt's Stage 2 cams in an engine mockup and finding exact lifts at all the durations. I also had to make a small set of mechanical adjustable lifters to di this properly. This data gave us guidance on piston valve reliefs, but also maximized the Dark Side spring seat pressure while still leaving comfortable room for above coil bind. Exhaust side spring pockets were counter bored and shims were put on the intake side to optimize setup. I can't give numbers away on Colts' cam but it is aggressive and you must do a proper check when assembling aftermarket valve train like this. I would not consider this cam a drop in and go setup. If you go back to my original thread you will see I had valve reliefs cut in my piston tops. I will post a few views from the valve train drawing when I get a chance.
A few comments for other peoples benefit. The valve train design was an interesting undertaking. Part of the process was putting a set of Colt's Stage 2 cams in an engine mockup and finding exact lifts at all the durations. I also had to make a small set of mechanical adjustable lifters to di this properly. This data gave us guidance on piston valve reliefs, but also maximized the Dark Side spring seat pressure while still leaving comfortable room for above coil bind. Exhaust side spring pockets were counter bored and shims were put on the intake side to optimize setup. I can't give numbers away on Colts' cam but it is aggressive and you must do a proper check when assembling aftermarket valve train like this. I would not consider this cam a drop in and go setup. If you go back to my original thread you will see I had valve reliefs cut in my piston tops. I will post a few views from the valve train drawing when I get a chance.