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Re: what about a single 1.5 su?

To: RMueller@grumobile.uscg.mil, esheffield@megapipe.net, androbus@yahoo.com
Subject: Re: what about a single 1.5 su?
Date: Wed, 19 Jun 2002 16:39:50 EDT
Cc: midgetsprite@yahoogroups.com, spridgets@autox.team.net
Interesting point but I'm not convinced.  For example all the big and highly 
tuned A-series engine make more power (peak power I guess) on a 45DCOE than 
than a single HIF44.  Also if the single carb idea worked for high rpm, high 
power A-series engines than the racers would all be using a 48 or 53 DCO 
modified for single barrel operation.


In a message dated 19/06/02 17:38:38 Greenwich Standard Time, 
RMueller@grumobile.uscg.mil writes:

> Actually, Vizard says its quite the opposite, that the movement of air
> through the single carb sort of sets up a "mini ram" effect from cylinder 
> to
> cylinder that twin carbs don't have because the air isn't moving as fast or
> as often.  I don't know, but it makes good reading!
> Bob
> -----Original Message-----
> From: RevdSpridget@aol.com [mailto:RevdSpridget@aol.com]
> Sent: Tuesday, June 18, 2002 2:59 PM
> To: esheffield@megapipe.net; androbus@yahoo.com
> Cc: midgetsprite@yahoogroups.com; spridgets@autox.team.net
> Subject: Re: what about a single 1.5 su?
> Although no-one says so, I would expect that at higher rpm the advantage 
> swings back towards twin carbs because the ports are 'seeing' the big 
> single
> so often it has hasn't seen one port before it starts to see another.  What 
> that rpm is I can't guess at but bet it is higher for a 998 than a 1275, 
> 1380, etc.
> RS

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