Piston rings no longer available...
02-16-2017, 12:36 AM
#1
Piston rings no longer available... So umm, what do I do. Hellfire piston rings in 4.030 1.5 1.5 3.0 are no longer made. I can't even get a 4.035 ring set in hellfire rings. What do you guys suggest? My engine went boom and torched the block and head, melted 2 spark plug electrodes and #7 top ring is completely collapsed.
02-19-2017, 08:07 PM
#7
I didn't get a picture of the block but it had to be decked. Bought some LSA heads, new gaskets, new bearings, block re-done and honed, new cam bearings. Should be back together this coming week. Decided to paint the engine bay while the motor was out. Fun fun...
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02-19-2017, 09:52 PM
#8
TECH Enthusiast
I'm curious what your did to create that much carnage, waste gate stick, or were you messing with nitrous? That looks like an LS9 gasket held in place with 12 pt head studs, that should have held anything somewhat normal going on in the combustion chamber.
It looks like you could fix that head though, welding a little aluminum into that breach, then a quick pass over the mill. I've had a cylinder head that was damaged worse than that, and had it fixed, but they were very expensive Robert Yates castings on a Ford about 25 years ago. If those are just inexpensive castings, and you don't have a lot on money in porting etc. it may not be worth it. Might want to consider checking into it, just to have a back up set on your parts shelf, if you liked those heads.
It looks like you could fix that head though, welding a little aluminum into that breach, then a quick pass over the mill. I've had a cylinder head that was damaged worse than that, and had it fixed, but they were very expensive Robert Yates castings on a Ford about 25 years ago. If those are just inexpensive castings, and you don't have a lot on money in porting etc. it may not be worth it. Might want to consider checking into it, just to have a back up set on your parts shelf, if you liked those heads.
02-19-2017, 10:39 PM
#9
They were stock ls3 heads. It would cost $100 to fix. Went with LSA heads for safety factor. Car was pig rich but 91 octane on 20lbs of boost. My fault 100%.
Basically this is what happens when your AFR gauge reads rich but you run too much boost on low octane gas. Timing was at 14 degrees.
Basically this is what happens when your AFR gauge reads rich but you run too much boost on low octane gas. Timing was at 14 degrees.
02-20-2017, 09:44 AM
#12
9 Second Club
They were stock ls3 heads. It would cost $100 to fix. Went with LSA heads for safety factor. Car was pig rich but 91 octane on 20lbs of boost. My fault 100%.
Basically this is what happens when your AFR gauge reads rich but you run too much boost on low octane gas. Timing was at 14 degrees.
Basically this is what happens when your AFR gauge reads rich but you run too much boost on low octane gas. Timing was at 14 degrees.
Boost and low octane are no problem unless the CR is silly high for it.
But when MLS gaskets let go, the damage you seen is very common. So whilst it could be detonation etc...it could just be **** happened, although certainly pushed by bad tuning.
I did the same on mine on a mile run around 8-9 years ago....although I totally fucked the engine, blew the heads, block, stretched the valves etc etc etc LOFL.
That said I sent the heads back to Trickflow and they repaired them and I've been using them since without issue.