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Paula's Vitesse! Print
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Matt306
January 23, 2017, 9:36pm Report to Moderator

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http://www.ebay.co.uk/itm/Triu.....a:g:v1cAAOSwNuxXb9dl
something like this but you need one for your carbs.


Worcestershire Area Organiser search Facebook for Club Triumph Worcester
Triumph 13/60 1970 Convertible  first car restoration, many botches much learnt... Now back MOTd and Taxed... 2016 RBRR COMPLETE
1974 Spitfire Mk IV in Yellow and Rust... for restoration
Triumph 1000cc 1991 Daytona got to go to pay for Yellow Peril
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JohnD
January 23, 2017, 10:44pm Report to Moderator


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Yes.
The idea is to put the carbs, esp. the float chamber, in the direct radiation 'shadow' from the exhaust manifold.
While the manifold is HOT, even if the screen absorbs the heat, it's nothing like so hot, so radiates much less to the carbs.

Plus, if it's mounted by being sandwiched between carbs and inlet manifold, beacsue the sheet has a large area there will be less conduction of heat via the inlet manifold, from the head, to the carbs.

Winner, on both routes of heat transfer!
Find some alloy sheet, EG http://www.ebay.co.uk/sch/i.html?_from=R40&_sacat=0&_nkw=aluminium+sheet&_sop=15 make up a pattern using CAD (Cardboard Aided Design) so that the carbs can't 'see' the exhaust manifold, cut out the sheet, drill holes to match the inlet bore and bolt holes.    Bingo!  

Proved to work, even with a lash up:  http://club.triumph.org.uk/cgi-bin/forum10/Blah.pl?m-1283198758/
Or there's a long, serious thread about it here: http://www.triumph.org.uk/cgi-bin/forum10/Blah.pl?m-1303407024/s-0/

Or, you can buy ready mades: http://www.canleyclassics.com/engine/carburettor-heat-shields/

John

PS 1mm alloy sheet is plenty thick enough.


Serial Vitesse racer.

Old Blue.  1995-2001
Silverback. 2001-2007
SofS. 2007 - to date.

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Paula
January 23, 2017, 11:14pm Report to Moderator

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Silly not to!
I love the tray idea!
Would the Spitty ones fit my Vitesse?


Vitesse 6 Saloon  "Feargal" (Sharkey)
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RobPearce
January 24, 2017, 8:12am Report to Moderator

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Quoted from Paula
Would the Spitty ones fit my Vitesse?

No, unfortunately not. The carbs are different (SU rather than Stromberg) with different mounting patterns (SUs are "handed") and they're also spaced differently.


Current fleet
1967 Vitesse 2L conv "Tessa"
1970 Spitfire Mk3 (project) "Toby"
1972 GT6 Mk3
Not enough time or space
Recently sold:
1972 2.5 PI estate "Harry" (gone to russell on here)
1973 Toledo 2-door "Spike" (gone to a club official)
Used to have:
1968 Vitesse 2L saloon
1980 Dolomite 1500
1977 Dolomite 1850
1980 Dolomite Sprint
1982 TR7 DHC Sprint
1975 2500S saloon
1971 Herald 13/60 Estate (with 1500 Spit engine)
1975 Stag
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JohnD
January 24, 2017, 8:17am Report to Moderator


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Oh!  I didn't look further, at the part numbers for Canley's heat shields - which are only for Spitfires!

No, I don't think the dual one would fit. possibly the single carb ones but are they the right shape and are the holes in the right place - I don't know.

So straightforward to make, i'd go that route.
And I said 1mm was more than enough - the disposable foil tray, much thinner,  would be just as good!  See: https://www.amazon.co.uk/s/ref.....01414CR3S,B00Q1NZHSK
John


Serial Vitesse racer.

Old Blue.  1995-2001
Silverback. 2001-2007
SofS. 2007 - to date.

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Paula
January 24, 2017, 8:27am Report to Moderator

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Quoted from JohnD
Oh!  I didn't look further, at the part numbers for Canley's heat shields - which are only for Spitfires!

No, I don't think the dual one would fit. possibly the single carb ones but are they the right shape and are the holes in the right place - I don't know.

So straightforward to make, i'd go that route.
And I said 1mm was more than enough - the disposable foil tray, much thinner,  would be just as good!  See: https://www.amazon.co.uk/s/ref.....01414CR3S,B00Q1NZHSK
John


I'll get crafting!


Vitesse 6 Saloon  "Feargal" (Sharkey)
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Pete Lewis
January 24, 2017, 12:48pm Report to Moderator

Tssc Herts and Beds A.O.
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quick question are you on down draft solex or side draft strombergs  ???

I  converted ny 1600 to strombergs  my Vit6 with tubular 631 manifold  std air box and engine fan with never ever any heating or vaporising fact of myths  about fuels for 12 years

Pete



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1964 1600 Vitesse 6 Cactus and Black , now  sold
now have T2000   Mk2 saloon in French Blue/grey trim  been  restored without running since 1997
now has power steering ,poly bushed and Alfa 156 seats
location  Luton
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Paula
January 24, 2017, 12:57pm Report to Moderator

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Quoted from Pete Lewis
quick question are you on down draft solex or side draft strombergs  ???

I  converted ny 1600 to strombergs  my Vit6 with tubular 631 manifold  std air box and engine fan with never ever any heating or vaporising fact of myths  about fuels for 12 years

Pete


Funny you should say that.
I'm on Strombergs with pancake air filters.
I had a really big think and a sit down and a cup of tea and decided i should restore it back to the Standard Air box with ducting pipe supplying cooler air.
Makes sense to me that this will help.
I popped over to ebay and picked one up for £25.




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Vitesse 6 Saloon  "Feargal" (Sharkey)
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Nick Jones
January 24, 2017, 1:19pm Report to Moderator

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The correct airbox will probably help a bit.  Pancake filters....... yuk!

Vaporisation and heat soak are real even if some cars are worse affected by others.  Certainly used to afflict my Vitesse when still running carbs, especially Strombergs.  The SU HIF4s I ran later were better, but they came with combined heat isolators/shields.

The main problem I had with the Strombergs was caused by the float chambers overflowing through the jet into the carb throat as the fuel warmed up and expanded.  This meant that every hot start after an interval of 5 - 60 mins was effectively a flood start - just hold the throttle fully open and wind it over 'tll it starts....  Not ideal.  Did fiddle about with float heights but never fully cured it.

Nick


Nick Jones
Somerset UK

Vitesse Mk 1.5 Convertible EFI, Survivor of RBRR 2008, HCR & 10CR 2009, HCR 2010, 10CR2011, HCR 2012, 10CR2013, 10CR2015, HCR 2016 & HCR 2017.
GT6 Mk3 Roto - project in progress
Spitfire MKIV son's project now on the road as a daily driver
2.5 PI Saloon now EFI (PIe?), Engine rebuilt and running sweet.  Diff howling...... Survivor of HCR 2013 & 2014 Gone to live in Swansea

http://www.tengaston.plus.com
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daver clasper
January 24, 2017, 1:43pm Report to Moderator
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Funny how it affects some cars and not others. Got standard unmodified, on my Viresse.  Worst it's got for me, is after idling for ages in traffic jams on blistering hot days, it some times takes a few seconds to restart.

Dave
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Pete Lewis
January 24, 2017, 2:02pm Report to Moderator

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and to get a good air flow into the air box ,, simplest is pump hose for aquatics  cheap and smooth on the inside
or
1.5" plastic sink waste pipe, but needs some cut and fettle  cold air is the king   and with std filters works with std needles just how triumph wanted    stick to the basics and you cant ever go far wrong

the stroms give approx +11bhp over the strangles solexs.  so base bhp is closer to 81 than the specified 70

always make sure air filters and gaskets dont cover any of the front face ports , it easy to forget this and fit them upside down
Pete



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1964 1600 Vitesse 6 Cactus and Black , now  sold
now have T2000   Mk2 saloon in French Blue/grey trim  been  restored without running since 1997
now has power steering ,poly bushed and Alfa 156 seats
location  Luton
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Paula
January 24, 2017, 2:34pm Report to Moderator

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Quoted from Pete Lewis
and to get a good air flow into the air box ,, simplest is pump hose for aquatics  cheap and smooth on the inside
or
1.5" plastic sink waste pipe, but needs some cut and fettle  cold air is the king   and with std filters works with std needles just how triumph wanted    stick to the basics and you cant ever go far wrong

the stroms give approx +11bhp over the strangles solexs.  so base bhp is closer to 81 than the specified 70

always make sure air filters and gaskets dont cover any of the front face ports , it easy to forget this and fit them upside down
Pete


Good stuff!


Vitesse 6 Saloon  "Feargal" (Sharkey)
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RobPearce
January 24, 2017, 4:13pm Report to Moderator

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My first Vitesse used to suffer (occasionally) from reluctance to start after a hot soak. Tessa had no problems until after the engine rebuild, when she was useless if hot. On one occasion she ground to a halt and refused to start until I poured a cup of cold water over the fuel pump. She now has an electric pump and seems a lot better (though I've not yet tried her in hot weather). Both cars were/are standard in respect of carbs and air filters.


Current fleet
1967 Vitesse 2L conv "Tessa"
1970 Spitfire Mk3 (project) "Toby"
1972 GT6 Mk3
Not enough time or space
Recently sold:
1972 2.5 PI estate "Harry" (gone to russell on here)
1973 Toledo 2-door "Spike" (gone to a club official)
Used to have:
1968 Vitesse 2L saloon
1980 Dolomite 1500
1977 Dolomite 1850
1980 Dolomite Sprint
1982 TR7 DHC Sprint
1975 2500S saloon
1971 Herald 13/60 Estate (with 1500 Spit engine)
1975 Stag
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JohnD
January 24, 2017, 6:16pm Report to Moderator


Posts: 6,876
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Pete,
Your mod certainly better than the OE 1" corrugated tubing, but physics determines flow.

The resistance to flow in a tube is directly related to the FOURTH POWER of the radius.    In other words, double the radius of the tube and the flow increases SIXTEEN TIMES (x2x2x2x2)
From one (being generous - corrugated tube's bumpy inner means it flows less than a smooth one) to one and a half inches will increase flow by 6.5 (1.6^4).   Double that for two tubes is 13 times.

One large tube beats two of half the radius every time!  But fitting a 2" diameter tube to the standard filter might not be easy.  
Paula has open pancake filters.   A 2" tube from the side of the radiator, to pick up cool air, directed across the filters will not be ideal, but might make a difference, in cooling and in delivery of cool air to the intake.

John

PS  Paula, you will have already discovered that if you ask two Triumpheros a question, you will get at least three answers.  J.


Serial Vitesse racer.

Old Blue.  1995-2001
Silverback. 2001-2007
SofS. 2007 - to date.

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Paula
January 24, 2017, 6:57pm Report to Moderator

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Posts: 484
Posts Per Day: 1.20
Quoted from JohnD
Pete,
Your mod certainly better than the OE 1" corrugated tubing, but physics determines flow.

The resistance to flow in a tube is directly related to the FOURTH POWER of the radius.    In other words, double the radius of the tube and the flow increases SIXTEEN TIMES (x2x2x2x2)
From one (being generous - corrugated tube's bumpy inner means it flows less than a smooth one) to one and a half inches will increase flow by 6.5 (1.6^4).   Double that for two tubes is 13 times.

One large tube beats two of half the radius every time!  But fitting a 2" diameter tube to the standard filter might not be easy.  
Paula has open pancake filters.   A 2" tube from the side of the radiator, to pick up cool air, directed across the filters will not be ideal, but might make a difference, in cooling and in delivery of cool air to the intake.

John

PS  Paula, you will have already discovered that if you ask two Triumpheros a question, you will get at least three answers.  J.


But 2 tubes from the grill into the old airbox instead will be better than the pancakes right? If by better i mean cooler.
I like all these answers.
If i implement all of them to a certain degree it must help!
Instead of getting crafty with a tray i splashed out on these:




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Vitesse 6 Saloon  "Feargal" (Sharkey)
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