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Re: what about a single 1.5 su?

To: Paul Archibald <androbus@yahoo.com>
Subject: Re: what about a single 1.5 su?
Date: Mon, 17 Jun 2002 19:40:36 -0400
Cc: Midget/Sprite <midgetsprite@yahoogroups.com>, Spridgets <spridgets@autox.team.net>
References: <20020617205010.38702.qmail@web13708.mail.yahoo.com>
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.0.0) Gecko/20020530

I've been considering this myself. I know in Vizard's book he talks 
about this being a good upgrade, even for an engine that is otherwise 
stock. Apparently the dual 1 1/4 SUs aren't quite sufficient, even with 
a stock engine and it's somewhat poor "breathing" capabilities. His 
description boils down to the fact that even though there are two carbs, 
the design of the manifold really only allows each cylinder to "see" one 
of them. With a single 1 1/2, each cylinder "sees" the effects of having 
1 1/2" vs. 1 1/4".

I saw Mike's post too - doesn't Vizard have some association with APT as 



1971 Midget "Bebop"

Paul Archibald wrote:

>another idea is running a single large su...what is the
>size/model people use? I see there is a mini manifold for 1
>1/2 tht appears to fit the hd-4's I have, so I could use a
>single one, but would it flow enough for the 1100/1275
>engine?(what should I call it a 1187? kinda curious what
>size it ends up with the 1275 head as it is..hmmm)

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