are these turbo pistons

[321GO!]

hi are these turbo pistons

 

[Mike Licht]

looks like a cast or hyper piston. Not something I would use

 

[321GO!]

looks like a cast or hyper piston. Not something I would use

so there not factory?

 

[X Ray]

so there not factory?

No...not factory...

 

[321GO!]

No...not factory...

are they ok to build a 87 motor with? or no

 

[Mike Licht]

They are not as good as a stock piston, if it was just a low boost stock rebuild with a stock turbo maybe, anything else no

 

[pacecarta]

looks like a sealed power cast ..and with the raised center ..for a buick 350v8

 

[321GO!]

im just going to completely redo the block then

 

[fastblackracing]

im just going to completely redo the block then. Theres a good possibility that the crankshaft is wrong as well, post up pics of the crank and the rods when you disassemble it so we can help you out.

 

[TURBOELKY]

Post a pic of the block too. Is that even a 109 block? Can't see much of the lifter valley but looks hot air or NA block. I could be wrong

 

[turbofabricator]

Those look like early NA V6 pistons and as stated 350 pistons. Not an '86/87 109 block, either.

 

[321GO!]

Those look like early NA V6 pistons and as stated 350 pistons. Not an '86/87 109 block, either.

it comes up as a 84-85 hot air turbo rwd block the casting number is 25514290 if that helps

 

[321GO!]

Post a pic of the block too. Is that even a 109 block? Can't see much of the lifter valley but looks hot air or NA block. I could be wrong

no i dont know? it came up as a turbo rwd 84-85 turbo block casting number is 25514290 if that helps any thanks

 

[321GO!]

will do i think its a real turbo block
just with diffrent parts

 

[321GO!]

looks like a sealed power cast ..and with the raised center ..for a buick 350v8

i have no clue im new to this lol i need help

 

[jiho2]

That block was used for NA motors as well as turbo during the '80s, until the oil pan was changed to 20-bolt. With different pistons it should be fine.

Those pistons may be genuine Buick, but they are for earlier NA motors, like pre-1978. That's a centering boss in the center, it was removed from later pistons after it was found to cause detonation during development of the first turbos.

Where did you get that thing? I don't know what somebody was doing with it.

 

[turbofabricator]

Nothing wrong with using that block, but everything else needs upgrading. It might even be an odd fire crank, too.

 

[321GO!]

Nothing wrong with using that block, but everything else needs upgrading. It might even be an odd fire crank, too.

what all do you think needs done should i just update eveything to be sure?

 

[321GO!]

That block was used for NA motors as well as turbo during the '80s, until the oil pan was changed to 20-bolt. With different pistons it should be fine.

Those pistons may be genuine Buick, but they are for earlier NA motors, like pre-1978. That's a centering boss in the center, it was removed from later pistons after it was found to cause detonation during development of the first turbos.

Where did you get that thing? I don't know what somebody was doing with it.

i bought it cheap lol i have no clue it has 14 bolt pan forsure! im makeing it an 87 motor so i might have to change alot of stuff lol

 

[jiho2]

Just to be sure, does it have the threaded hole for a knock sensor at the rear of the block? That area is just outside the right edge of your picture (post #13).