A little while ago, my 75 Spitfires engine had a vacuum line that was
split. After the obligatory vacuum line joke from my local auto store
employee, he procured a length of the correct size and I managed to get
the engine running again.
I was pondering this weekend while I was on a road trip (Sadly, not in
it) just how much of the lines and bottles up there are really
You can get away without a bottle - my Triumph 2000 hasn't got one, my PI
has. But if your Spit has a bottle fitted, I would keep it.
The difference is that if the engine cuts out, the vacuum stored in the
bottle will give 4 or 5 fully power assisted stops, but without it you get
one stop that is nearly power assisted and after that, no assistance. You
can't do cadence braking on slippery surfaces without a bottle either
because the vacuum doesn't have time to recover before you reapply the
Judging from the e-mail address you use and your IP-nr, I'm guessing
you're posting from the US. That probably means you're talking about a
US-spec Spitfire with all manner of smog control equipment, which was
thankfully lacking on UK- and Euro-spec Spits.
Now you have some of the inhabitants of this (UK) newsgroup confused, as
they seem to believe you're talking about vacuum for a brake servo -
which was never a standard fitment on any Spitfire.
Anyway - if you want to talk about the smog control stuff on Spits, this
really isn't the best place. I suggest you get yourself subscribed to
the Spitfires mailing list, which is full of helpful Americans with
similar cars, some of which still have their power sapping US-spec
pumps, bottles, hoses and what have you.
Go to this web page for more information:
Subscribing to the mailing list is a matter of e-mailing to
firstname.lastname@example.org with 'subscribe spitfires' or 'subscribe
spitfiresdigest' (without the quotes) in the subject line. You'll be
asked to confirm your subscription - read the instructions. It's a busy
list from what I remember, but worth it.
Just tell'em I sent you. ;-)
'All parts falling off of this car are of
the highest quality British manufacture'
Yes, I am in the US. Columbus Ohio.
The vacuum line I replaced ran from the carburater to a filter in front
of the radiator.
As for the smog control, Well, the air pump was gone when I got the
car, and it runs fine. I would like to simplify as much of the car as I
As I mentioned in an earlier post, it did not come with vacuum assist
breaking. But there have been a few days where I could have used it.
I will visit the web site you suggested.
Thank you again.
Thanks again. They are hammering away on all sorts of topics. I might
be able to get an word in.
For the non- US cars is there a schematic/diagram for what it should
and should not have. I have a Haynes manual, but I think it is about 20
_Some_ of the US market Spits ("50 state" ? version) are described.
Californians had even more kit in there, some of which isn't listed. If
you're working on a re-imported Californian Spit, this can get
Has anyone ever seen a vacuum bottle to provide vacuum for a servo on a
car as light as a Spit? I haven't - I've had plenty that powered
ancillaries such as aircon flaps or doorlocks, but the only brake vacuum
bottles I've seen were on older Jags with Dunlop brakes.
DISCLAIMER: I'm in the US with a US-Spit('79)
There's no vacuum brake assist in the Spitfires(correct). on the GT-6 they do
offer an aftermarket vacuum brake assist, which is of course pricey.
As for smog equipment, I am no stranger to that. Since emissions testing stopped
in my state, I removed the air pump, switched to a 4-2-1 exhaust, and a plain
intake manifold(for a Weber DGV). I do have the 2 carbon canisters and the
breather system to go back to the fuel tank, however.
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