Bonneville Engine:
- Thread starter McRat
- Start date
Sometimes. At Bonneville I already had too much going on to worry about hooking up a computer. I know the coolant never got "hot", maybe 225, if that.
There were no indications or CEL's when the engine retired. It just lost power, I popped it in neutral, and it died. Fuel vapor was billowing out of the hood and the exhaust had turned white for a few seconds before it quit. Back in the pits, it would crank, but not start.
Here is also link to the crower rod autopsy
http://www.duramaxdiesels.com/forum/showthread.php?t=8386&highlight=crower
Ahhh, the shake to remove style ring's
. Just wondering if they butted together causing the pistons to stick!
. Just wondering if they butted together causing the pistons to stick!
Ahhh, the shake to remove style ring's
Not that I could tell. There was aluminum smeared on the bores, and the piston skirts were galled. The "good" bores had some aluminum galling, but no broken rings. They were getting ready to stick.
By going with a "Stroker", Does that not move the pin up into the piston further, and also have a shorter skirt length? I would think that would make things worse! Im only going off of the gas engines that I build though. We had this problem with a twin turbo stroker motor. We de stroked the engine and gained piston skirt and got the piston support back that was needed. We could go an avarage of eight more races between build's with the new setup as well. but it was a Gas drag engine and not a LS Diesel Engine.
I don't think the pistons pull apart because they are weak, I think they are seizing.
Drag racing at 4500rpm or sled pulling isn't pulling them apart. It's sustained heat. I believe Banks saw this same thing when they first started playing with their endurance racing truck engine.
Drag racing at 4500rpm or sled pulling isn't pulling them apart. It's sustained heat. I believe Banks saw this same thing when they first started playing with their endurance racing truck engine.
when is it necessary for 5" exhaust ??? i know a lot of you guys are pushing the 4" exhausts way up there in hp.... but if 4" is good to the 900whp or so that your running why do all these guys making 400whp bother to switch from the stock 3.5" other than eliminating the stock muffler.
Good question. Looks I guess. My truck had the 3.5 inch exhaust (straight piped) on it for years. Made over 600 hp on it.
x2..that and desired exhaust tone.
Or in female terms...will an oven dissipate heat more efficiently with a restrictive exhaust or a huge hole out the back?
In my opinion EGT's are the most critical issue in the longevity of pistons, experienced second hand. (dynoing at a shop with a restrictive exhaust system = loose)
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The oil flow rate could be suffering at your rpms. From 2 years ago, I seem to recall that it stopped increasing around 3000 rpm. so above this rpm, you are getting less oil qty on each stroke.
I still have that flow meter, it may be worth another look.
Other big diesels have higher oil flow rates than we do...FWIW.
I still have that flow meter, it may be worth another look.
Other big diesels have higher oil flow rates than we do...FWIW.
Could the oil flow to the piston cooling oil jets be increased in any way? Could a dedicated pump be used to squirt highly cooled oil on the pistons? Suck from a common sump, cool the oil with an Ice/water cooler and have a seperate oil circuit for this task...
