Do I have .030 over block and pistons?

Justa_v6

Member
Apr 15, 2011
140
4
18
Los Angeles
I bought the car several years back and drove it a while and parked it with the hopes of upgrading with ported heads and having the block bored over.

I finally got back to working on my car and decided to install ported iron heads I purchased here. I purchased all the gaskets and head bolts and when I removed the head I was surprised with this. I tried to look them up with no success.

Do I have .030 over bore pistons. I don’t have inside micrometer to measure.

If so it is a nice surprise.







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Justa_v6

Member
Apr 15, 2011
140
4
18
Los Angeles
I figured just wanted to make sure. Great one less thing to spend money on. Thanks for all the help guys.


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ScottHeidinger

Active Member
May 2, 2015
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What are your goals for the car? You might want to read up on hyper pistons in a turbo engine. Probably ok for close to stock but I would put some forged slugs in.


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michael evans

Active Member
Feb 27, 2008
804
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Louisville, Kentucky
I took a new set over of hypers over to my engine guy and he would not even look at them let alone putting them in my engine. He told me to take them with me and bring a set of forged the next time I came over.
 
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ScottHeidinger

Active Member
May 2, 2015
611
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northeast Florida
https://www.turbobuick.com/threads/hyper-pistons-bad.113390/

Here is one of many threads on the hypers but I think they are mostly talking about them in a 4.1 application. There is good and bad things said about them. I’ve never used them but if they were in my engine I would want to know what potential issues to avoid. In the picture guide they seem to be lacking support in the wrist pin area and that would concern me but it costs a lot of money these days to rebuild a short block and they are in your engine already.
HTH


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earlbrown

runs with scissors
May 26, 2001
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https://www.turbobuick.com/threads/hyper-pistons-bad.113390/
In the picture guide they seem to be lacking support in the wrist pin area and that would concern me but it costs a lot of money these days to rebuild a short block and they are in your engine already.

it's not so much the wrist pin area, it's the ridiculously stupid way the oil ring has the return slot opened up. It basically makes the skirts only supported by two small spots when the piston tries to rock over. When they crack, the pinch off the rings and make them worthless. Within milliseconds, you'll know it when smoke starts to chug out the breathers like a freight train.



I've seen me do it. Never again.
 
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