Exhaust manifold and SU carrbs

[a_colo_native]

I am going to install my dual SU carbs for performance and easier
starting when hot. I need a new exhaust manifold. What years and/or
engines do I need to look for? I am thinking most any Spit will work?

John

 

[John Friese]

Hi John,

Since you are talking about SU carbs, am I correct in assuming you are
running a later Spitfire engine in your Amphicar? If so, I noticed
that a Spitfire Mk I (62-64)type exhaust manifold exits straight down,
like the original Amphicar manifold, instead of the angled output of
many of the later units. I haven't tried it but it's something you
might look into.

John Friese

--- In amphicar-lovers@yahoogroups.com, "a_colo_native"
<minnow@a...> wrote:
> I am going to install my dual SU carbs for performance and easier
> starting when hot. I need a new exhaust manifold. What years and/or
> engines do I need to look for? I am thinking most any Spit will work?
>
> John

 

[a_colo_native]

> Since you are talking about SU carbs, am I correct in assuming you
are
> running a later Spitfire engine in your Amphicar? If so, I noticed
> that a Spitfire Mk I (62-64)type exhaust manifold exits straight
down,
> like the original Amphicar manifold, instead of the angled output of
> many of the later units. I haven't tried it but it's something you
> might look into.

John,

I am using the original engine. The SU carbs will eliminate the
typical carb problems and help "wake up" the little Herald engine, if
only a bit. I will look into the manifold you mentioed as it sounds
like it the right stuff. I have a couple of private emails with some
good info to check out also.

I drive my car too much to not make these improvements. So far I have
put over 900 miles on her since last July. Just last week I took her
for a 90+ mile drive. The Amphicar Extraordinaire is becomming a
local celebrity of sorts in my town of 4000.

I am putting the socket fix in the "foegeddaboudit" file. It was
worth a try.

John

 

[John Friese]

Hi John,

I wouldn't screw up the "originality" of the car and wrestle with the
fit problems if I were keeping the 1147. I just don't think it would
make enough difference to justifiy the effort. One of my cars had a
1296 Spitfire engine in it with a Weber 2 barrel carb and that
combination made quite a difference in getting over the hills out here
in California. Yesterday I installed a 1500 engine in that car and I
imagine that now it will really get over those hills. I'll have it
running today and find out.

John Friese

White 67
Red 67


--- In amphicar-lovers@yahoogroups.com, "a_colo_native" <minnow@a...>
wrote:
> > Since you are talking about SU carbs, am I correct in assuming you
> are
> > running a later Spitfire engine in your Amphicar? If so, I noticed
> > that a Spitfire Mk I (62-64)type exhaust manifold exits straight
> down,
> > like the original Amphicar manifold, instead of the angled output of
> > many of the later units. I haven't tried it but it's something you
> > might look into.
>
> John,
>
> I am using the original engine. The SU carbs will eliminate the
> typical carb problems and help "wake up" the little Herald engine, if
> only a bit. I will look into the manifold you mentioed as it sounds
> like it the right stuff. I have a couple of private emails with some
> good info to check out also.
>
> I drive my car too much to not make these improvements. So far I have
> put over 900 miles on her since last July. Just last week I took her
> for a 90+ mile drive. The Amphicar Extraordinaire is becomming a
> local celebrity of sorts in my town of 4000.
>
> I am putting the socket fix in the "foegeddaboudit" file. It was
> worth a try.
>
> John