As soon as the staff at KT Engines pulled the head on this Windsor Late Model Stock-level
In racing, just as in life, eventually bad things are going to happen. It's a lesson most of us learn as kids when that great toy we got for Christmas broke on the 26th.
That's the lesson we learned as kids; the lesson we learn as adults is that sometimes things go wrong and there's nothing you can do about it, but sometimes you can. The fancy word for it is "failure analysis," but it really just comes down to figuring out what went wrong so you can fix it next time. Yes, we like to keep things simple.
With that in mind, we've got a couple of examples of how engine builders attack engine failures to diagnose the problem, or problems, and make sure they don't keep cropping up to bleed your racing budget dry. When repairing or rebuilding a failed race engine, it's also critical to make sure you've identified all the damaged components and either replace or repaire them so that they don't in turn cause a failure of their own.
Here’s a look at the combustion chamber for that cylinder. From all the damage around the
While working on other projects with KT Engine Development, two broken race engines came in, one right after the other. The first was a Ford Windsor which the owner had bought used on the cheap and brought in for a rebuild—also on the cheap. "When you are trying to rebuild an engine that you don't know the history on, it's difficult," explains owner Ken Troutman. "You have to do a lot of detective work to try to determine how well the engine builder put it together the first time and how long the parts have been in the engine. It seems like everybody who is selling a used race engine will tell you that it has just been rebuilt, but the reality is that's rarely the case.
"When we rebuilt this Windsor," Troutman continues, "we wanted to replace everything we had a question about, but the customer was on a very limited budget. One of the things we specifically questioned was the valves, but the customer said he didn't have the money. Unfortunately, a valve failed pretty early on and now he's got to spend a lot more money to get the motor back together and running.
"I understand that it can be difficult to spend money to replace parts that look like they should be fine, but the upfront cost of doing things right the first time is almost always a lot cheaper than the cost of repairing your mistakes later."
The second broken engine was a motor that came in from a new customer. This engine had never been touched by KT Engines, and the customer was coming to the shop because of previous engine failures at another shop. This one turned out to be a broken connecting rod, but the real cause is just a bit more involved. Let's take a closer look at both.
Here’s a look at the intake and exhaust valves. The ultra-aggressive camshafts used in mod
Any time you have engine trouble, take a close look at the contents of the oil pan to see
Here’s what we pulled out of the oil pan. Luckily, it looks like mostly valve and piston m
One of the benefits of running forged aluminum racing pistons is that they are malleable.
Some debris from the piston got wedged between the cylinder wall and the side of the conne
Along the way, the seized valves also put enough pressure on the lifters to kill the cam l