I'm having a hard time telling what took out what here. I'd think for the lifter to fail and the end result be a broken rod, there would have had to be piston to valve contact, which there wasn't, but I don't know how breaking a rod would result in a broken lifter. Those were Morel lifters and they haven't even been in there all that long. Kind of unusual to see a hydraulic lifter break like that.
Plans are to build a Dart block motor. There's no need messing around with a stock block with how hard I push it. I'm not too upset about this engine, as it lasted way longer than it should have.
Plans are to build a Dart block motor. There's no need messing around with a stock block with how hard I push it. I'm not too upset about this engine, as it lasted way longer than it should have.
I was bringing my daughter home from riding her horse, and I gave it a quick little burst getting onto the highway. Maybe 3/4 throttle or so, but I let RPMs come up to about 6300-6400, and just as I was going to shift.......BOOM
I am "re-thjinking" how often I am going to rev my engine to 6,000+ RPMs. It is very fun to do, but that picture of the twisted connecting rod gives one pause.
This engine is 4 years old, and that stuff has never been replaced, which would be fine for what 99% of people do with their cars, but I was way exceeding what the internals are rated for.....way exceeding. If I ran the full 1/4 on the bottle, it went through the traps at 7200-7300 RPMs. This was a stock F4TE block, Scat CAST crank, and I beam rods, and a hydraulic cam. Cast cranks and I beam rods were never meant to turn that kind of RPMs, but they turn 6400-6500 all day with no issue. This is the main reason I tried to run 1/8 mile most of the time, because this engine was on borrowed time from day 1. The engine made enough power on motor to run 10.90s@124 on motor, and it's seen up to a 250 shot, and has made over 200 passes with anywhere from a 150-200 shot. Most of those were about a ~175 tuneup.
That rod didn't fail because I was turning 6300 RPMs. It failed due to parts fatigue as a result of being WAY overstressed for so long. I drove this thing on the street 6000-7000 miles per year, and I can tell you it saw over 6300 every time I got in it. It made power to about 6700 RPMs.
Sorry about your luck. I can't resist posting a pic of my 1600 Formula Ford motor from a few years ago after the crank let go, also destroying my transmission housing and adapter. 7000 RPM and everything just went quite....no oil, fire or drama, it just quit with a mild bang !
Wow! That's an interesting one. Awesome pictures. Sorry about the engine, though it sounds like you knew it was on borrowed time anyways so it's not too much of a hardship.
I'm doing a Dart block, so it'd be silly to shell out that cash on not put a quality rotating assembly in it. If I did another stock block, I'd probably still go with the stuff I had. I think it'd be a tossup on what fails first. I'm really wanting to do a turbo setup, but I'm not sure I'm patient enough to save the money. Nitrous is easy and effective.
On Corral, Woody who owns Strokeme had posted a while back that a lot of F4TE cores he's inspected have had cracks in the cam journal area and he's had to scrap them. Maybe this was the issue.
If this block had a crack, it's even more amazing that it lived so long. Lol.
Fatigue killed it. Every time I went to the track, it was kind of a running joke when it was going to die, and it never would. I kept spraying the crap out of it, and it kept living. I even classed raced the stinking thing for 3 years. Metal gets tired and breaks.
And this block originally came from woody, and then I spent another $1000 replacing his junk rings, and fixing his half assed machine work, just to fix the ridiculous amount of blow by it had.
sportsroof69;8205313 I'm really wanting to do a turbo setup said:
I'd love to do a turbo setup too. But vintage Mustang with their shock towers are a big impediment to turbo plumbing and I'm not looking to cut out my shock towers
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Vintage Mustang Forums
4M posts
89.2K members
Since 2001
A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more!