Re: Converter Suggestion - Big Al!!

Big Al wrote:
>>> Have a 950 HP on my 10 second OT street car. They are rated at a
>>> different vacuum level than regular carbs. Look into it before you
>>> go shopping. Was surprised to find out about this AFTER I bought
>>> mine:( Think they are rated like the two barrels.
>>
>>    Hmm. Where is this info on the Web? This is a new one on me.
>>
>
> Google is your friend:) Stolen from
>
http://www.carreview.com/cat/parts/carburetors/holley/PRD_2173_2889crx.aspx
>
> Summary:
> Holley may be misrepresenting their HP carb sizes, a HP 950 is closer
> to a 830, a HP1000 is about a 870 if measured the same vac as a 47--
> series. The industry standard for cfm ratings was 1.5"Hg vac for a 4
> barrel. holley decided to follow the deciptive lead of it's
> competitors and use 28"wc which is 2.06" hg. Holly has all their
> carbs listed with flow spects. They make no distinction between a HP
> type and a older 4781 type. Unless you actually flow a carb, with
> holley's listings, you can't tell what flow it may be since the
> listed flows of the 4 barrels are not made with the same test
> standard. Their all listed together by flow ratings. I'm just for the
> truth in advertising, if holley actually told the test vac for carbs
> it would be better, Esp if they use different test spects for
> different 4 brl carbs. It looks like Holley uses a 1.5"HG vacuum
> standard for the 47_ _ series carbs and for the HP series they use
> 2.06"hg vacuum test standard. The result is a false comparison
> between the two carbs. I got tricked and many others will be also.
> Spread the word about this . The HP950 has a 1 3/4 base plate and a 1
> 3/8 venturi. A older 850 has a 1 3/4 base with a 1 9/16 venturi A
> HP830 has a 1 11/16 base and a 1 9/16 venturi

I totally stole this stolen info and posted it at my place.