Combine PR of different domains to point to new site

what affect this would have?

[penfold25]

I have 4 domains with PR for each of 3,3,4,4. I however am starting a new project and am wondering whether if i put my link on all these domains i would get the shared PR effect.
What would that be?
What should i do to make maximum benefit out of the PRs i currently have for this new site, since i want this new site to supercede all the previous?

[trillianjedi]

Is the new site replacing the old?

TJ

[takagi]

If it is replacing the other 4, your could use a 301 redirect. The PageRank of the 4 would be more or less totalized (but be aware the Toolbar PageRank is not a linear scale, so it could become a PR5). However if you have a few links from the same ODP catergory, then you will loose some PR, once they discover that you basically have one new site. Maybe same for other sites linking to more than 1 of these 4 sites.

[penfold25]

well actually the others are just crappy sites, that are out of date and the new site is something different. However i wanted to hopefully get some benefit from my previous efforts. I do not have any sites listed ODP, so wont affect that. The thing is should i 301 redirect all areas of old sites with some PR to the new URL.?

[trillianjedi]

If the old sites are not being replaced by the new, then I wouldn't bother with the 301.

If you just put front page links on your existing sites in an "in context" way as possible that will get you indexed.

Then concentrate on dmoz - and get your two listings if you can (regional and World).

TJ

[takagi]

For maximal PR transfer, a 301 redirect is the best.

You could put one real link on the all 4 home pages, and some javascript links to give visitors access the old site. But in that case the demping factor will reduce the PR transfer (about 85% instead of 100%).

If you add a link to the new site without changing the current linking and put a 'noindex' meta-tag in all the current sub pages, the PR transfer might be even lower.

[penfold25]

thanx alot
but lets just say
Domain 1 - pr3
domain/page1/P4

Domain 2 - p4
domain 3 - p3
domain 4 - p4

Should i add my self as the only external link from these pages so i can kind of add up my pr for my site?

[takagi]

In the original papers about PageRank, there is no difference between a internal link and a external link. From your home page you now have one or more internal links to the sub pages. Let's say, you have a home page with 3 internal links. Each of them get (1/3 * 0.85) of the PR of the page. If you add an extra link to the new site (3 links --> 4 links), your new site will get from that link (1/4 * 0.85) of the PR of that home page. This 0.85 is just an example, the exact damping factor is one of the secrets of Google. Anyway, the more links there are on a page, the less PR transfer goes to your new site. And you need at least 1 link to give access to the current sub pages. Or you need a link that Google cannot follow (JavaScript, cloaking, or whatever). In the last case the link is not shared, but the damping will still reduce the PR transfer.

[penfold25]

so i should cut ties with all internal links and have just one external link?
this will give me max benefit?

[takagi]

so i should cut ties with all internal links and have just one external link?
this will give me max benefit?

Yes. You might want to check (with www.alltheweb.com or so) if your sub pages have deep links. For "crappy sites" (it's your words) that is unlikely. If you have, you should do the same for those pages that are deep linked to get also the maximal PR transfer from those pages.

[penfold25]

ok
well i have about 6 pages with decent pr.
with 3 PR 3
and 3 with P4
what would be likely result of this?

maybe PR 5?

[trillianjedi]

maybe PR 5?

No.

Low to mid PR3.

TJ

[takagi]

Low to mid PR3.

I would say a PR4, but please remember the toolbar PR is rounded to a whole number. Your current PR4 can be 4.01 or 4.99 so anyway it is guessing. See it as a nice kick-start for your next project. Make a good site, and in time you can get new links to this site.