Normal carburettors also meter by pressure differential.
The pressure differential is caused by flow through the
venturi.
Unless the carb on the vehicle is downright restrictive,
you are not likely to get 15 or 20% increase in power without
going to individual carbs per cylinder like on dual DCOE webers.
The advantage in going from (1) 40mm throttle on a single carb
to (4) 40mm throttles on dual sidedrafts is only along the lines of
a 25 to 30% increase in flow potential (ref. weber application data).
Even with the 30% incease in flow potential with the dual sidedraughts
the typical alpine engine would gain only 10 to 15 BHP.
More than anything, the compression and camming impact engine power
more than the specifics of carburettion and flow do.
This is why it costs a lot of money to make significantly more than
stock HP figures.
Jarrid Gross
-----Original Message-----
From: Bill Blue [mailto:dablue@lightbound.com]
Sent: Wednesday, March 19, 2003 3:25 PM
To: Jarrid Gross; Whiteford Andy; Alpine List
Subject: Re: Minnow Carbs ?
I just got off of their site. There are a couple of instances where stock
engine performance was measured, a Minnowfish installed, adjusted and
tested. Increases were in the 15-20% range (I think, didn't make any
notes). The simplisity of the thing is intriguing. Especially as it
supposedly does not meter fuel by flow, but by pressure differences, making
it appropriate for supercharging applications.
Bill
----- Original Message -----
From: "Jarrid Gross" <jgross@econolite.com>
To: "Bill Blue" <dablue@lightbound.com>; "Whiteford Andy"
<A.G.Whiteford@gcal.ac.uk>; "Alpine List" <alpines@autox.team.net>
Sent: Wednesday, March 19, 2003 5:54 PM
Subject: RE: Minnow Carbs ?
> Piner clan,
>
> That they will only sell a carb to an engine prepped and tuned by them
> ought to be all you need to know about whether you need one or not.
>
> When claims of 25% increase in power arrise, is this before or after
> they had thier way with the engine?
>
> Apples and oranges I say.
>
> Jarrid Gross
>
>
> I tried contacting them a year or so ago. I got an automated reply that
> they would sell the carb only on an engine prepped and tuned by them.
Sure
> is interesting though. As I understand, Fireball Roberts had considerable
> success running a Fish on a Pontiac back in the days when NASCAR was still
> running on the sand in Daytona.
> Give them a shout and let us know if they have cahnged their marketing
> strategy. If they have, Jim E. can buy one and evaluate it for us. A 1:1
> comparison with Webers! That's as good as it gets.
> Bill
> ----- Original Message -----
> From: "Whiteford Andy" <A.G.Whiteford@gcal.ac.uk>
> To: "Alpine List" <alpines@autox.team.net>
> Sent: Wednesday, March 19, 2003 7:10 AM
> Subject: Minnow Carbs ?
>
>
> > Does anybody know anything about these?
> >
> > Any Comments?
> >
> > Some of the reviews / road tests from the 1960's
> > claim large performance gains.
> >
> > http://minnowfish.co.uk/carbs/index.htm
> >
> > just wondering . they're now a local company, and
> > claim Sunbeam compatability...
> >
> > -A-
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