dezrik
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- May 27, 2006
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- VN 5.0L Berlina S2 Slushbox
Hey guys,
I am in the process of rebuilding a blown 308 bottom end from a VN (I know they were 304's but this one came with ACL stamped pistons, a 308 crank, and a 40 thou oversize so I'm assuming it's a 308? It was assembled as such in my Berlina anyway and appears to have blown from a lack of servicing.)
Anyway, I'm not too up-to-date on bottom end stuff such as compression ratios and the like and I am looking at an ACL rebuild kit.
I want to up the bottom end power wise and work on all the extraneous bolt-on shmaltz later on.
As far as I understand the stock compression ratio was 8.4:1 and the pistons in the ACL rebuild kit are flat top (what's the difference with flat top... all the more expensive ones seem to be flat top) and have a compression ratio of 9.3:1. Do the pistons in the kit basically give me an instant compression ratio increase?
How do I get my compression ratio to 9.5:1 - 10:1?
I am not too familiar on ways to increase the compression ratio, besides having read about head shaving and the like.
Anyway, there's a collection of ACL rebuild kits, from the basic kit to the ACL Race Rebuild Kit (which is about $940 or so) at Gimmecarparts.com.
Is the Race Rebuild kit worth the extra dosh, and in what way? I take it is, especially for future applications, but I'd like to now the 'how' as some of these things are a little out of my depth.
Anyone know of any other options I have with rebuilds/kits/pistons etc. and any other places to find them cheaper?
Phew that was a long winded bloody question without about 20 mini questions. Thanks guys.
I am in the process of rebuilding a blown 308 bottom end from a VN (I know they were 304's but this one came with ACL stamped pistons, a 308 crank, and a 40 thou oversize so I'm assuming it's a 308? It was assembled as such in my Berlina anyway and appears to have blown from a lack of servicing.)
Anyway, I'm not too up-to-date on bottom end stuff such as compression ratios and the like and I am looking at an ACL rebuild kit.
I want to up the bottom end power wise and work on all the extraneous bolt-on shmaltz later on.
As far as I understand the stock compression ratio was 8.4:1 and the pistons in the ACL rebuild kit are flat top (what's the difference with flat top... all the more expensive ones seem to be flat top) and have a compression ratio of 9.3:1. Do the pistons in the kit basically give me an instant compression ratio increase?
How do I get my compression ratio to 9.5:1 - 10:1?
I am not too familiar on ways to increase the compression ratio, besides having read about head shaving and the like.
Anyway, there's a collection of ACL rebuild kits, from the basic kit to the ACL Race Rebuild Kit (which is about $940 or so) at Gimmecarparts.com.
Is the Race Rebuild kit worth the extra dosh, and in what way? I take it is, especially for future applications, but I'd like to now the 'how' as some of these things are a little out of my depth.
Anyone know of any other options I have with rebuilds/kits/pistons etc. and any other places to find them cheaper?
Phew that was a long winded bloody question without about 20 mini questions. Thanks guys.