View Full Version : Bore
HKSenilyks
09-12-2006, 07:52 PM
Yea I was thinking i would any way its got a little scoring on it. .30 what do you guys think
1QUICK4
09-12-2006, 08:15 PM
If you do any overbore do .020
HKSenilyks
09-13-2006, 01:02 AM
.20 alright
Thor06
09-16-2006, 12:00 AM
Jake (EclipseGST) once told me that 2.0 blocks can go out quite a ways. 2.4 and 2.0 blocks use the same casting and the bore of the 2.0 blocks is 85mm while the 2.4 is 86mm. He says hes seen 2.4's go over .040 so you should be able to go .040 over on a 2.0 block and still be perfectly fine.
If you can get away with just honing and new rings by all means do that but I wouldnt be scared of boring the shit out if you have to especially if you only go out .020.
Super Bleeder!!
09-16-2006, 12:40 AM
2.0 and 2.4 blocks are certainly not the same casting. their deck heights differ by like 6mm!
HKSenilyks
09-18-2006, 05:01 PM
I'm just trying to build a 2.0 right now. Once my cars running I'm going to start on a stroker.
1ViciousGSX
09-18-2006, 07:18 PM
Why build two? Build one right the first time.
2.0 and 2.4 blocks are certainly not the same casting. their deck heights differ by like 6mm!
And why couldn't the 2.0 just be a smaller bore and be milled down 6mm more? It's only 1/4", which is 2 passes on cast iron. Maybe 45 seconds of machine time.
HKSenilyks
09-19-2006, 04:15 AM
Why build two? Build one right the first time.
I'd love to and am still thinking about it, but theres one problem, $$$.
Goat Blower
09-19-2006, 11:56 AM
And why couldn't the 2.0 just be a smaller bore and be milled down 6mm more? It's only 1/4", which is 2 passes on cast iron. Maybe 45 seconds of machine time.
It might be real similar to a NT 2.0 block, but not a turbo block. Things like oil squirters and a knock sensor hole.
If you're going to build a motor with aftermarket pistons and rods, it's not any more expensive to just build a 2.4. But I wouldn't go more than .020 on a 2.4 block, there's been more than a few cases of cracked cylinders, like Momin's. You can bore the hell out of a 2.0, .060 is not unheard of.
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