-----Original Message-----
From: Paul Hunt <paul.hunt1@virgin.net>
To: Bud Krueger <bkrueger@ici.net>
Cc: MG List <mgs@autox.team.net>
Date: 26 November 1998 19:55
Subject: Re: 25D4 vs 45D4
>Bud Krueger wrote:
>>
>> A bit of advice, please. My '77MGB has HS4's and an early twin downpipe
exhaust
>> system (once I get around to installing it). I will be using a Pertronix
>> ignition system. My problem is this: I have a 25D4 and a 45D4 available
to
>> me. Which one should I use? Why? TIA.
>
>Depends what you mean by 'should'. If you mean 'by the book' then
>probably the 45D4. However, almost every change to the carburation and
>ignition systems on the B throughout its life were emissions related,
>each change reducing performance to varying degrees. Therefore the 25D4
>will probably give performance closer to the original, but the
>carburation, combustion and exhaust characteristics of your particular
>car will all have a bearing on how successful the substitution will be.
>
>PaulH.
>
>
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