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the twin SUs and 4-2-1 Eurospec exhaust will definitely be a noticable
improvement.
Late 70's spits were de-tuned (smog regs) in the US and choked down with
the single ZS carb , somewhere around 58 hp.
Just the carbs and exhaust change puts you back to near 75HP..... and
before the cam change!
ptegler
On 10/24/2020 6:34 AM, Jeff Scarbrough wrote:
> > The 1500 engine is positively athsmatic and has always had breathing
> issues in standard spec. No doubt there will be howls of protest in
> favour of the 1500
>
> Well, I'm about to find out. My short block has been cleaned up and
> balanced, a lightened flywheel and slightly hotter cam has been
> purchased, and my head is at a 1500 specialist having its breathing
> attended to. Add a pair of HS4s and the UK exhaust manifold, and it
> ought to be better than the original US spec, anyway. I will
> certainly have spent enough cubic dollars to go at least a little faster..
>
> Jeff Scarbrough
> Corrosion Acres, Ga.
>
>
>
> On Fri, Oct 23, 2020 at 1:51 PM John Macartney
> wrote:
>
> Air pollution regs kicked in for 1968 build. Albeit very limited,
> the SU carb proved a bit difficult to lean out and thatâ??s why
> Spitfires from either 1969 or 1970 model year used a single
> Stromberg. My personal opinion is the Mk3 Spitfire with the 1296 8
> port head is the Best Buy, hotly followed by the 1296 Mk4. The
> 1500 engine is positively athsmatic and has always had breathing
> issues in standard spec. No doubt there will be howls of protest
> in favour of the 1500 but the many Iâ??ve driven over years -
> rebuilt/cared for/completely knackered - were all the same, I.e.
> seriously disappointing and that same engine in the Midget made
> that great little car something that is best forgotten.
>
> Jonmac
>
> Bessie Braddock: â??Winston! Youâ??re drunkâ??.
> Churchill: â??and you, Madam, are ugly. But tomorrow, I shall be
> sober but you will still be uglyâ??.
>
> On 23 Oct 2020, at 17:28, Sujit Roy <triumphstag@gmail.com
>
>> Thanks for the answers. Here are a few follow up questions.
>> If the Smog parts were completely removed from the car and it
>> needs it, what is the worst case cost wise to buy this stuff to
>> get it though a Smog? What workshop equipment would I need to buy
>> and cost to make sure I can get it close to passing a smog
>> without having a repair shop tweek it to pass a smog check? Also,
>> are '74 year and earlier cars exempt from a smog but '75 on are not?
>>
>> Regards, Sujit
>>
>> --
>> Sujit Roy
>> Cupertino, California
>>
>> https://triumphstagblog.wordpress.com/
>>
>>
>> Donate: http://www.team.net/donate.html
>> <http://wwwteam.net/donate.html>
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>> http://www.team.net/archive
>>
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>>
>> http://autox.team.net/mailman/options/triumphs/john.macartney@ukpips.org.uk
>
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Paul Tegler
ptegler@verizon.net www.teglerizer.com
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<p>the twin SUs and 4-2-1 Eurospec exhaust will definitely be a
noticable improvement.</p>
<p>Late 70's spits were de-tuned (smog regs) in the US and choked
down with the single ZS carb , somewhere around 58 hp.<br>
Just the carbs and exhaust change puts you back to near 75HP.....
and before the cam change!</p>
<p>ptegler<br>
</p>
<div class="moz-cite-prefix">On 10/24/2020 6:34 AM, Jeff Scarbrough
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAO8Q7CMcwt22bj2QP4Dck0w91e8wHjhuBo2q-n0T9Ugej++pzA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">>Â
The 1500 engine is positively athsmatic and has always had
breathing issues in standard spec. No doubt there will be howls
of protest in favour of the 1500
<div><br>
</div>
<div>Well, I'm about to find out. My short block has been
cleaned up and balanced, a lightened flywheel and slightly
hotter cam has been purchased, and my head is at a 1500
specialist having its breathing attended to. Add a pair of
HS4s and the UK exhaust manifold, and it ought to be better
than the original US spec, anyway. I will certainly have
spent enough cubic dollars to go at least a little faster..</div>
<div><br>
</div>
<div>Jeff Scarbrough</div>
<div>Corrosion Acres, Ga.</div>
<div><br>
</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Oct 23, 2020 at 1:51
PM John Macartney <<a
href="mailto:John.Macartney@ukpips.org.uk";
moz-do-not-send="true">John.Macartney@ukpips.org.uk</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">Air pollution regs kicked in for 1968 build.
Albeit very limited, the SU carb proved a bit difficult to
lean out and thatâ??s why Spitfires from either 1969 or 1970
model year used a single Stromberg. My personal opinion is
the Mk3 Spitfire with the 1296 8 port head is the Best Buy,
hotly followed by the 1296 Mk4. The 1500 engine is
positively athsmatic and has always had breathing issues in
standard spec. No doubt there will be howls of protest in
favour of the 1500 but the many Iâ??ve driven over years -
rebuilt/cared for/completely knackered - were all the same,
I.e. seriously disappointing and that same engine in the
Midget made that great little car something that is best
forgotten.
<div>
<div><br>
</div>
<div>Jonmac<br>
<br>
<div id="gmail-m_6520465779848206012AppleMailSignature"
dir="ltr">Bessie Braddock: â??Winston! Youâ??re drunkâ??.
<div>Churchill: â??and you, Madam, are ugly. But
tomorrow, I shall be sober but you will still be
uglyâ??.</div>
</div>
<div dir="ltr"><br>
On 23 Oct 2020, at 17:28, Sujit Roy <<a
href="mailto:triumphstag@gmail.com"; target="_blank"
moz-do-not-send="true">triumphstag@gmail.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">
<div>Thanks for the answers. Here are a few follow
up questions.</div>
<div>If the Smog parts were completely removed
from the car and it needs it, what is the worst
case cost wise to buy this stuff to get it
though a Smog? What workshop equipment would I
need to buy and cost to make sure I can get it
close to passing a smog without having a repair
shop tweek it to pass a smog check? Also, are
'74 year and earlier cars exempt from a smogÂ
but '75 on are not?</div>
<div><br>
</div>
<div>Regards, Sujit</div>
<div><br>
</div>
-- <br>
<div dir="ltr">
<div dir="ltr">
<div>Sujit Roy<br>
Cupertino, California</div>
<div><br>
<a
href="https://triumphstagblog.wordpress.com/";
target="_blank"
moz-do-not-send="true">https://triumphstagblog.wordpress.com/</a><br>
<br>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<blockquote type="cite">
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<pre class="moz-quote-pre" wrap="">** <a class="moz-txt-link-abbreviated"
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<pre class="moz-signature" cols="72">--
Paul Tegler
<a class="moz-txt-link-abbreviated"
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