[Healeys] Carburators on 1960's Era Rally Cars

[simon.lachlan at alexarevel.plus.com]

That's what I found when I swapped my 3 HD6s for 3 Webers. Once I floored it, the thing went like a rocket but otherwise it was nothing special. Went back to the 3 HD6s. (Much better than the original HS4s).
Webers would have been more useful if I'd not had a 28% OD and a 3:54 diff. ie by the time the revs were up, I was going too fast.
Webers looked nice....
Simon


________________________________
From: Healeys <healeys-bounces at autox.team.net> on behalf of HealeyRick via Healeys <healeys at autox.team.net>
Sent: Saturday, January 10, 2026 17:09
To: pdzwig at summaventures.com <pdzwig at summaventures.com>
Cc: healeys <healeys at autox.team.net>
Subject: Re: [Healeys] Carburators on 1960's Era Rally Cars

I purchased my BJ7 from its original owner who had bought it new in 1963.  In 1965 he decided to take it SCCA racing and when I got the car it had triple HD8s and a BJ8 cam. He told me he had bought the carb set-up from "Healey of Canada". I did some research on the carb and manifolds and found the numbers matched to ones allowed for SCCA racing and were in some Healey literature parts lists. I found the carbs were great at wide-open throttle (like you'd use on track) but lacking in acceleration at lower speeds. If I were going to fit triple SUs on a road car, I'd probably stick with HD6s rather than HD8s.

Rick Neville aka "HealeyRick"

On Mon, Jan 5, 2026 at 6:32 PM Peter Dzwig via Healeys <healeys at autox.team.net<mailto:healeys at autox.team.net>> wrote:


Harold,

it depends how accurate you want to be. According to Peter Browning's
"The Works Big Healeys", talking about the rally cars he says:

" The 1960 cars ran with triple 2-in (51mm) SU carburetters on
individual inlet manifolds...[producing].. 180bhp at 5200 rpm.

The use of triple 45 DCOE Weber carburetters in 1962 improved power
output to around 200bhp at 5750rpm with a 10:1 compression ratio and a
high-lift cam"

I would get hold of a copy of Browning's book and go to the back and
think about how far you want to go!!

Hope that this helps.

Peter

On 04/01/2026 18:33, Harold Manifold wrote:
> Hello,
>
> I am considering updating the carburetor setup on my MkI BT7 to match
> the configuration used on the factory rally cars. I have seen photos of
> the Rudd Speed triple HD6 arrangement and was wondering if this is the
> setup the rally cars utilized.
>
> Any information or photos you could provide would be greatly
> appreciated. My goal is to ensure the setup remains period-correct.
>
> Thanks,
> Harold
>
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--
Dr. Peter Dzwig

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