Engine Blow up on Dyno - Questions
#1
Engine Blow up on Dyno - Questions
I just had the tuner vortech supercharger kit installed on my 05 G35 coupe 5MT. My engine internals are all stock. Along with the charger I had a 1/2 inch plenum spacer installed, MRev2, Fast intentions high flow cats on the stock cat back. To hold the power I had a JWT clutch and flywheel installed.
Prior to the supercharged install, I had no excessive oil consumption issue or anything that would indicate the engine is not in decent shape. It does have 90K miles on it.
On the second pull on the Dyno, the engine started smoking badly. Now it won't even turn over. Cylinder 6 spark plug is damaged and cylinder 5 is unscrewed but will not come out of the spark plug hole(end is probably damaged). At the time of the failure the engine was at 5600 RPM and making 367 whp on a Dyno dynamics Dyno.
I am thinking the engine probably threw a rod but looking for opinions on what others think could have happened. I'm just surprised that this happened 2000 rpm below redline. The charger was probably making peak torque at that time but I would think it would still be within the limits of what the stock internals could handle. These centrifugal chargers don't make a lot of torque so I have no clue why the engine failed.
The tuner said all the AFR, timing etc numbers looked fine at the time of failure. Any thoughts from anyone?
Prior to the supercharged install, I had no excessive oil consumption issue or anything that would indicate the engine is not in decent shape. It does have 90K miles on it.
On the second pull on the Dyno, the engine started smoking badly. Now it won't even turn over. Cylinder 6 spark plug is damaged and cylinder 5 is unscrewed but will not come out of the spark plug hole(end is probably damaged). At the time of the failure the engine was at 5600 RPM and making 367 whp on a Dyno dynamics Dyno.
I am thinking the engine probably threw a rod but looking for opinions on what others think could have happened. I'm just surprised that this happened 2000 rpm below redline. The charger was probably making peak torque at that time but I would think it would still be within the limits of what the stock internals could handle. These centrifugal chargers don't make a lot of torque so I have no clue why the engine failed.
The tuner said all the AFR, timing etc numbers looked fine at the time of failure. Any thoughts from anyone?
#4
#5
Wow here I am thinking a stock rod could handle at least 400hp for a few dynos.might as well lower the compression of the pistons and up the boost.
#6
#7
My tuner is saying all the numbers looked fine but I wasn't there as well. What did you end up doing? Did you rebuild the motor or did you replace it?
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#9
Thankfully I had a spare motor I rebuilt, the motor that blew up would need a decent overbore or sleeved and a new head. If I could do it all again I would have bought a built motor instead of building mine. It's been a huge pain in the ***.
#12
really odd that both went down on #6 at about the same power level. is there a known oiling issue to that last rod bearing? or possibly you had a clogged fuel injector. hard to believe it just arbitrarily went, and only on one cylinder. there had to be a timing snafu unless the piston was weak to begin with.
did you have a compression/leakdown test done on the cylinders prior to the install?
did you have a compression/leakdown test done on the cylinders prior to the install?
#14