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Old 07-14-2008, 08:31 PM   #36 (permalink)
DoctorDex
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Join Date: Jul 2005
Location: Edmonton, AB
Drives: '91 VR4 - RIP
Trader Rating: (16)
DoctorDex is an unknown quantity at this point
Default Re: Catastrophic engine failure, suspect pre-ignition (Pics to follow)

Quote:
Originally Posted by badass3000 View Post
do you have 2 EGT probes or just 1?
was it reading #3?

I dont get this, this probably wasn't caused by too much power, and it sounds like your tune was rich enough. Plus IIRC the Meth should have helped with knock and lowered EGT's. So what was the cause?
could #3 just have not received the same fuel as the others and just ran lean?
this scares me...Im about to run 6 EGT probes, if I can figure out a way to do it.
No EGT probes, just a WB. EGT probes x2 were on the list of things to do, but just never got around to it.

If it is possible to crack a piston without breaking it and then being able to limp around on it for a week, only to have it fragment later while at full boost, then perhaps I can lay blame on the check valve solenoid of my meth kit. Approx. a week before this fateful event, the valve seized which resulted in the worst knock I have ever seen, ie. 24 counts x 6 - 7 data points (in 1st gear). I later repaired the valve (it just needed to be loosened off 1/2 a turn), only to have the motor frag. on my first WOT run after the repair.

As far as finding a new motor, the deal for $1700 turned out to be too good to be true... bit of a mixup between myself and the seller. Back to the drawing board. Really need to figure out where I'm going to go with this car and where I am going to find the cash. Maybe I'll try the bank for a line of credit. lol.
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'91 VR4 - Rebuild in progress: Mods TBA.
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