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Blanco, If I remember right you are runnig Nippon right???

Yea that was the first thing the guy told me. "Bring in your pistons so we can bore the cylinder to match the piston." So, yea they know what they are doing, been doing it since the 60's and get this they are only going to charge me $8.00 per cylinder to "bore match the cylinders"!!!! To the...

:( The link does not work.:(

Bore Well, I checked the cylinder bore on the LS block. The readings that I got were 3.185" to 3.188" on all cylinders. Not to bad, I guess. I am worried about going to much on the bore due to increase in compression with the larger surface area of the new pistons. I was thinking of 81.25mm but...

No, problem for "jacking" but, I will be going NA and plan on using Nippon (NPR) or YCP pistons. Maybe sometime in the future I will in stall a JRSC. But, until then I will just stick with some cast pistons.

Compression Well, since I am building an LS/VTEC I was wondering about the compression. I know most recommend an 11:1 and up ratio but here is my delima. My company will pay for my fuel but not 93 octane only 87. So, I was thinking of going with P72 pistons with a GSR head and that would give...

^^^Where are they located??? Velocity "Matchless Performance" is no longer around.

Calesta thank you. No, I do not have the pistons in hand that is why I asked the question so, I could decide on what piston to buy 81mm or 81.25mm. I dont have any scoring or scratches on the liners but, there is a lip at the top on cylinder #1 that you can catch your nail on just a little. Oh...

Anyone?

Ok, I did search and did not find my answer. So, here goes. I have an LS block that was run as an LS/VTEC with the stock pistons. Now, before I purchase new pistons what would qualify for me to bore or just hone (cross hatches) out the cylinders, I was wondering if I have to go up in size or if...