WARNING: Do not replace your stock crank pulley with the aluminum aftermarket junk!

I learned another hard lesson with my car and installing pretty parts. I picked up and Agency Power billet aluminum crank pulley for m build to "Reduce rotational weight". It didn't work out like I expected and what a hunk of junk it turned out to be. Also keep in mind there are several companies that have these and 90% of them look like they are made in the same overseas factory and just engraved with various company names. I've learned my lesson, I'm putting the stock pulley back on and counting my lucky stars I didn't do any more damage than what I did.
Let me paint this picture on how / what happened. I was out on my private strip doing a few tuning pulls and getting my new turbo kit dialed in. I had just finished up run # 20 something and started packing everything up after making 640whp and 490wtq (Power is probably a contributing factor here as well). So after double checking everything and getting ready to hit the freeway I wanted to check response and check for boost spikes. In Idaho our freeways are 75mph so I decide to do a 1st -3rd quick pull while getting on the inclining on ramp.
So at the top of 3rd everything just went dead, no noise and no warning signs just dead. The service engine soon light came on and I pulled off to the side of the road so I could pull the code. P0340 and some other random cam code I can't remember. I got out looked the car over and since I didn't see any puddles under it or obvious fragmented parts so I decided to try and start it back up hoping maybe it was just an issue of something like chain stretch. With a couple of quick start attempts that were unsuccessful I stopped and called a tow truck. I knew something was wrong just from the sound, or lack of sound while trying turn it over.

I got the car home, did a tear down and discovered;







Now my poor Cosworth head needs to be rebuilt because the valves are bent. Overall just for parts and a machine shop I'm looking at $700 on the low end. Not to mention I now need a new head gasket, timing chain, crank pulley, oil pump chain, timing chain tensioner, and all new fluids. There I'm looking at an additional $500 or more. So not including labor because I'm doing this myself the cost is over $1200 just in parts with some machine work.

I know Agency Power isn't going to refund me that even though it's there part that failed causing the other issues. Besides even if they did there would probably be some sort of stipulation to keep the incident off the web and I just couldn't let this happen to someone else.

Now there is a bit of a bright side to all of this, on other motors I've seen that have rotated 180* off after jumping / busting a timing chain / belt not only did they trash their valves but where the hit fucked up the piston's and cylinder walls. My pistons are perfect, my cylinder walls are perfect. All I did after I took the head off was wipe off the pistons with a rag and they look beautiful and not a single ding on them. Now if I were running a higher lift cam there would probably be more damage but overall I ended up in good shape compared to others.





If you have one of these take it off your car before you end up with an expensive repair bill. Even though my car is over 600whp it can still happen to lesser powered vehicles over time or even with a harsh down shift.