How many miles do they put on a timing chain though before it's replaced? Not sure, they do hours of use instead. I vaguely recall something like 50 hours? I assume an average speed of 160kh/h which I recall reading somewhere once, I think how they were our fastest race cars for a long time, averag...

Here is a good video about chain wear and the stretch that comes with it.

https://www.youtube.com/watch?v=d7cWv_ccJtA

The consensus was any aftermarket roller chain, don't run a damper even if they stretch a little. Silent chain (OEM) run the damper, they are way more loose than the roller chain sets, new and old. I think I even asked Dandy engines when I was bored one day at work as was near the area and picked th...

I would have gone straight to the Mahle pistons, you honestly can't go wrong with them and lowering comp is always easier than trying to raise it with big dish pistons that are OEM. With the heads left un-milled other than the min for surface, those larger CNC chambers, I would have guessed a comp o...

My other mild hot engine's torque curve is wavy as hell, this stock engine is very smooth in the curve by comparison. The hot engine has a 109 LSA and a decent amount of overlap which all make the curves go wonky and the centerline is 114 or there abouts. Only 212 duration and 470 lift, but makes ab...

They are nice heads indeed! I'm always jealous of you NZ guys, you always have all the good engine stuff and companies and have good support for the Buick. Over here, if it ain't LS or Barra, they aren't interested in helping you most of the time. Given the rpm range of the cam, I would say the 280 ...

Here is the Formula VE that I ported to 12P some years ago from an original BIN from the series. just FYI, despite common saying that peak VE = peak torque, it's a myth. I found on the dyno it to almost always be untrue. Yes, sometimes the torque curve can have a similar shape to the VE, I found mos...

Damn! those heads are mint! I've never seen CNC Buick heads before, are you able to share the info on them? As for the VE, that's pretty normal on these with big cams, the bigger the durations, that more you get these double peaks. It's from the intake/exhaust coming in and out of resonance at certa...

I agree about those engine building practices. I also opted for the smallest over size pistons I could find. 20 thou was the smallest, and in my case I would have liked maybe 5 thou as the Buicks very rarely wear much past the standard size and just need some correcting from the factory tolerances a...

The factory panels on these are a high quality steel with much better stiffness and spring, much lower corrosion and they could make them much thinner as a result and lighten the vehicle while adding safety and stiffness at the same time to get a similar net weight to stuff that was made in the deca...