Thread:

Broke my SE motor

What kinds of RPMs and speeds were you seeing before it broke? I have a feeling we'll see a lot of head and valve train issues as people push for the 85 limit.

What compression, What timing, What spark plug, What carb, What manifold, What fuel?????????? Maybe we can help with a little more information, for those of us that don't know your program!!!!!

Sorry to see you have issues before a race! A lot of people keep leaning the motor down by reading spark plugs and get into trouble like you did, especially with the lack of compression! Running the program on the dyno is plus so you can figure all of these things out Prior to testing or racing!

Good luck!

I have been playing with the Vortec heads for years now...

You have a potential rocker arm problem like a bent stud or a tight guide. The exhaust guides need to fit pretty loose if running sustained RPM, especially if running the motor really cool and lean (I know the lean condition was not intentional)

Also, have you verified the cam timing?

Just some off the top of the head thoughts. Running retarded ignition timing will do strange things too, but it sounds to me like it was running "too" good.

That exhaust valve looks funny to me, not funny haha, funny queer...

You need math to figure C.R.? Who knew. With the chamber at 64 you're right around 9.2 depending on the valve notches in the pistons.

FC Pilot is dead on. Can those POS projected tip plugs. You going for a smog check or trying out for a milage marathon.

I'd say you you some how managed to detonate #7. Like you said, the rings are probably toast and causing the leak, probably lifted the head enough to blow a path for the water, or, as you said, the manifold was not only not sealed to the outside world, it wasn't sealed to the neighboring water port.

Like GT Jets said, the guides are probably tight and you hung #1. No sure why he thinks it looks queer. Its looks bent and it looks like it was kissing the piston even after it bent.

I guess this class is a great learning curve to racing. You, Shawn, and Marissa, and who ever else are lucky these were SS PS GN or cracker engines.
Just because they are basically warmed up stockers doesn't mean you can assemble one and tune on like the family grocery getter.

GET RID OF THE PLUGS!!!

Originally Posted by gn7

You need math to figure C.R.? Who knew. With the chamber at 64 you're right around 9.2 depending on the valve notches in the pistons.

FC Pilot is dead on. Can those POS projected tip plugs. You going for a smog check or trying out for a milage marathon.

I'd say you you some how managed to detonate #7. Like you said, the rings are probably toast and causing the leak, probably lifted the head enough to blow a path for the water, or, as you said, the manifold was not only not sealed to the outside world, it wasn't sealed to the neighboring water port.

Like GT Jets said, the guides are probably tight and you hung #1. No sure why he thinks it looks queer. Its looks bent and it looks like it was kissing the piston even after it bent.

I guess this class is a great learning curve to racing. You, Shawn, and Marissa, and who ever else are lucky these were SS PS GN or cracker engines.
Just because they are basically warmed up stockers doesn't mean you can assemble one and tune on like the family grocery getter.

GET RID OF THE PLUGS!!!

Probably should have clarified the queer valve I was referring to the rusty number 7...hey, isn't that an adult beverage?

It almost looks as though number 7 was pumping a lot of water....What do the cylinder walls look like?