10-14-2007, 12:16 PM
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Senior Club Cobra Member
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Join Date: Jul 2007
Location: Odessa (Tampa),
FL
Cobra Make, Engine: BDR 559. 410 Stroker 72 block AFR205 Heads, Solid roller lifters, Comp Cams XR286, Eagle 4" stroke internally balanced with chevy journals, Oliver rods, Probe Forged pistons, Mighty Demon, Super Victor, MSD Digital 6.....
Posts: 260
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Not Ranked
When Stroker Motors Go Bad....
Well...
Taking a nice casual drive home Saturday morning when all of a suddon in stop and go traffic I hear a high speed rattle. I immediately kill the motor and coast to the side of the road. 40 mins later my car is towed home and the fact finding mission begins....
The first clue is an exhaust rocker out of adjustment, second clue is a plug that has been beaten to a pulp.
We dig in and pull the head.... Here's what we find.....
JUST WONDERFULL!!!!!
We pull the other head, here's what we find there...
And here's what we have left for the rest of the pistons....
So, Obviously the valves have been dancing with the pistons for about 400 miles due to insufficient valve clearance. My builder says it was caused by valve float?? I find that hard to believe when the motor hasn't exceeded 6500rpm while in my possession. Comments? Suggestions?
The motor let go while in traffic with rpm's between 3500 - 4000 (It was between 2 -3 shift).
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BDR 559
Indigo Blue, White Stripes
SBF 410
TKO 600 .82 OD (Road Race)
HP= Enough!!
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