Bore it .010 or .030

[Scoobum]

Opinions wanted. I have a decision to make. I have the rotating assembly out of the block with the cracked cylinder. I have a standard bore block. One of the .030 over pistons is scrap...was damaged from the crack in the cylinder. Do I purchase a new .030 over piston and have this block bored .030 over for the this rotating assembly...or do I toss the 5 remaining .030 over pistons and order new .010 overs...as I'm positive this block will 'clean' at .010 over.

[Steve Wood]

If you don't mind spending the money, I would probably go +10 so the block could be redone again in 20 years

[Scoobum]

If you don't mind spending the money, I would probably go +10 so the block could be redone again in 20 years

That was my thot. Piston recommendation that can handle 10.90 all day? Think the .030's are TRW's.

[Steve Wood]

I think Mike is selling Diamond pistons and they are good.  We used to go JE for  top end stuff.  Wiseco was good. Probe sells some I think.

TRW are good value for the money and we liked them because the alloy did not expand as much so they could be fit tighter and the rings lasted a long time. They are heavier but if you use the light pin and rebalance, they are good for the money.  No problem for 10.90.

Paul is probably a good up to date source.

[motorhead]

10 over.  Keep the meat, up the boost.

[larrym]

yes .010 would be my thought too weisco is the most cost effective the have an office in ontario i talked to them when I was putting together my short block.
Ended up going with used diamonds the TRWs are less but you have to go .030




Wiseco Piston Canada
948 Keyes Dr, Woodstock, ON N4V 1C2
519-537-6281

[earlbrown]

I can make you some forged 5 overs if you want and be a hellovalot better than TRWs

[tb3]

Go 10 over and make some of these with your 30's for around the house

[Just a Six?]

I can make you some forged 5 overs if you want and be a hellovalot better than TRWs

I did that to my last rebuild which I ended up selling to a friend. They were CP 5 overs from Nick at Arizona GN. I figured that it was better long run to save all the meat I could for a future rebuild. 

[dyermullet]

Not to hijack but is there an available option for 0.005" over pistons?  And are rings easily available for 5tho over and 10 tho over?   I PM'd earl brown on the other board asking what became of his custom piston project but he didn't respond.

[earlbrown]

Since we run larger than normal ring gaps, a set of 'filt to fit' STD would work fine in a .005" over.

when did you PM me?

[earlbrown]

I did that to my last rebuild which I ended up selling to a friend. They were CP 5 overs from Nick at Arizona GN. I figured that it was better long run to save all the meat I could for a future rebuild. 

It's also a good money saver as you don't have to pay for boring, just a hone job.

[dyermullet]

I did that to my last rebuild which I ended up selling to a friend. They were CP 5 overs from Nick at Arizona GN. I figured that it was better long run to save all the meat I could for a future rebuild. 

It's also a good money saver as you don't have to pay for boring, just a hone job.

That is what I am thinking.  I will not be building this car for all out racing.

How about ring availability for 0.010" over?  In all my years of owning and following the turbo regals I just mostly skipped over the hardcore buick v6 engine details.  I was more concerned with tuning and enjoying.  And since I knew it wasn't as easy as a chevy or ford I just assumed I would learn about it when I got there.

[earlbrown]

There's plenty of rings in 3.810" all thickness are covered.

[dyermullet]

Since we run larger than normal ring gaps, a set of 'filt to fit' STD would work fine in a .005" over.

when did you PM me?

http://i497.photobucket.com/albums/rr337/87buickregal/piston_zpsf6aa4ee0.jpg