|
|
Post by ghost on Aug 4, 2021 21:58:13 GMT -5
|
|
|
|
Post by Stinger on Aug 5, 2021 0:02:17 GMT -5
Stock block or overbored? If bored, how large?
Looks like it probably blew the HG, hydrolocked, and blew a hole in the cyl while the cyl was full of coolant and it was cranked or started.
|
|
|
|
Post by ghost on Aug 5, 2021 5:50:04 GMT -5
Head gasket in perfect condition. It is sleeved and O-ringed not sure what final bore ended up being but there is decent. Material left on jacket.
|
|
|
|
Post by ghost on Aug 5, 2021 5:51:56 GMT -5
Happened on a running car tuning the top end boost. My only thought was Hair line crack in Liner that opened in boost allowing coolant in and hydro locking….
|
|
|
|
Post by ghost on Aug 5, 2021 5:52:20 GMT -5
Happened on a running car tuning the top end boost. My only thought was Hair line crack in Liner that opened in boost allowing coolant in and hydro locking….
|
|
|
|
Post by ghost on Aug 5, 2021 6:41:17 GMT -5
But you are the expert so thought I would ask you lol received car from my dad after he had it built that is why I don’t know tolerances. Put my stinger engine management system on from previous build. Figured I blew the head gasket and pulled head off to find perfect condition head gasket and hole on cylinder wall…..you think it was just over bored? Bran new engine essentially.
|
|
|
|
Post by Stinger on Aug 5, 2021 12:55:12 GMT -5
Measure the bore. Max overbore on a turbo build is .030" (3.810" bore) and that's "pushing it" on a super high powered setup if you're not using hard-blok to reinforce it.
|
|
|
|
Post by ghost on Aug 5, 2021 18:36:35 GMT -5
I got 3.795 on that cylinder at the top of the cylinder
|
|
|
|
Post by Stinger on Aug 5, 2021 20:56:45 GMT -5
Stock is 3.780. I'd assume it's bored .010" over and the other .005 in your measurement is wear, measuring device, and error differences. Either way, it's not an issue with being bored too large.
Any idea what sort of power it was making? If not, what head, cam, turbo, fuel, and how much boost?
|
|
|
|
Post by ghost on Aug 5, 2021 22:55:41 GMT -5
Borg Warner EFR 6258 ported head, essy 2277 boost was about 22ish lol on premium fuel 80 pound injectors and not enough power….lol
|
|
|
|
Post by Stinger on Aug 6, 2021 0:49:44 GMT -5
OK, so somewhere around 325hp-400hp. Certainly not beyond the capability of a stock block in general.
|
|
|
|
Post by ghost on Aug 7, 2021 1:33:18 GMT -5
No definitely not…. this has me puzzled
|
|
|
|
Post by Stinger on Aug 7, 2021 3:29:53 GMT -5
I'd try to get that piece to knock loose so I could measure the thickness. It's possible that particular block just had a lot of core shift. You may be able to measure this without removing the piece and you can get the calipers around the edge of the cyl where the crack and gap is.
|
|
|
|
Post by ghost on Aug 9, 2021 16:01:10 GMT -5
Yes I will try that on my next days off. Also I have a bunch of machine work done to that block is there a way to salvage it? Does anybody do sleeves?
|
|
|
|
Post by Stinger on Aug 9, 2021 17:42:08 GMT -5
The block can be sleeved, just gotta find someone local to you that can do it. If they aren't local then you'll spend more on freight than you've got in machine work.
|
|
