: Why do these motors break rods?



2dedge
06-21-09, 05:43 PM
I was running a Northstar in my rock buggy up until last week when it tossed a rod through the valley right under the starter at just above idle.

I assume I damaged the motor earlier maybe from an overheat up to 260 for about 10 miuntes(fan relay failed)but the oil never went to cream and it wasn't using coolant so I thought I was ok.

Now I am gun shy about replacing it, and I am thinking about a supercharged 3800 series 2.

2dedge
06-21-09, 05:47 PM
This was a great day!

bajarails
06-21-09, 06:44 PM
What PCM do you run? I'm building an off road car with '98.

bajarails
06-21-09, 06:47 PM
What PCM do you use? I have a '98 in an off road car.

Ranger
06-21-09, 06:55 PM
Yeah you had to do something. The bottom end is pretty strong. Head gaskets are the weak link. If I where you, I'd buy one with bad head gaskets cheap and stud it. http://www.northstarperformance.com Then it should be damn near bullet proof.

2dedge
06-21-09, 08:28 PM
I am pretty sure the abuse I give the motor had something to do with it, but I have seen 2 others in junkyards the same way still in the car.

dkozloski
06-21-09, 11:25 PM
Northstar rods are about as exotic as stock rods get. They are powder forged with cracked caps. You must have been turning about a jillion RPM.

2dedge
06-22-09, 06:43 AM
6700 rpm redline:crying2:

bajarails
06-22-09, 04:40 PM
Thanks for the info, 2dedge. I couldn't reply because I am not yet allowed PM's yet. I'll tell you about my setup if I can get through to you somehow, you could email me at dan (at) glenellenlabs (dot) com.

2dedge
06-22-09, 04:56 PM
Well after further research it destroyed the piston and the schrapnel came through the block not the rod.

STSS
06-22-09, 06:27 PM
pics?

I've put the pic of your buggy up on my work computer and everyone loves it.

97EldoCoupe
06-23-09, 11:25 PM
Piston? Bad case of pre-ignition? Nitrous? What happened?

AJxtcman
06-28-09, 08:54 AM
let me guess you have been using a Commander 950? Don't feel bad I hear about this type of thing with them and the Fan Thing also