The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
It is currently Thu Mar 28, 2024 6:29 pm

All times are UTC




Post new topic  Reply to topic  [ 15 posts ] 
Author Message
 Post subject: Castle Combe
PostPosted: Sat Jun 09, 2007 10:40 am 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 5:48 pm
Posts: 8446
Location: Winscombe, North Somerset, England
A bit late I know, but I'm off to Castle Combe in a mo. It's the classic & sportscar action day. £10 entry. I'm only spectating unfortunately.

_________________
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


1997 TVR Chimaera 450


Image


Top
   
 Post subject:
PostPosted: Sun Jul 01, 2007 3:14 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 5:48 pm
Posts: 8446
Location: Winscombe, North Somerset, England
If anyone has next Monday off (not tomorrow), I'm taking part (hopefully) in a Track day at CC with MGoT & CT. The only downside is that the MGs will be in different sessions to the Triumphs......wooses! :wink:

Anyway, it's free to get in afaik & I shall have an empty passenger seat for those who dare! :D

_________________
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


1997 TVR Chimaera 450


Image


Top
   
 Post subject:
PostPosted: Thu Jul 05, 2007 6:56 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 5:48 pm
Posts: 8446
Location: Winscombe, North Somerset, England
If anyone wants to take part in their Dolly on Monday, I beleive there are a couple of spaces left.

_________________
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


1997 TVR Chimaera 450


Image


Top
   
 Post subject:
PostPosted: Thu Jul 05, 2007 9:31 pm 
if only i didnt have to give a weeks notice for giving holiday.

hope the weather holds for you mate!


Top
   
 Post subject:
PostPosted: Fri Jul 06, 2007 11:27 am 
Is there a link somewhere for how to get to the circuit? I've got Monday off so might pop up to watch/try and blag some passenger rides...

(tho presumably you need a lid for anything on track? damn...)


Top
   
 Post subject:
PostPosted: Fri Jul 06, 2007 4:33 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 5:48 pm
Posts: 8446
Location: Winscombe, North Somerset, England
Here's a link to the CCC website:-

http://www.castlecombecircuit.co.uk/findus.htm

I'm pretty sure there will be helmet hire, not sure how much, give 'em a ring.

_________________
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


1997 TVR Chimaera 450


Image


Top
   
 Post subject:
PostPosted: Tue Jul 10, 2007 8:28 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 5:48 pm
Posts: 8446
Location: Winscombe, North Somerset, England
Well we had a great day & no rain to boot (except for a couple of spots).

There were only 12 cars in our sessions, all Triumphs unfortunately. It would have been nice to mix it up a bit with the MGs as it was at Silverstone in March. Ah! well. The sessions lasted for 15 minutes and we had 4 in the morning & 3 in the afternoon.

Near the end of the second session I was just going round Quarry, I lost all power & the rear wheels locked up for a second. Pulled it over onto the grass and tried to start it again but it wasn't going to. It was then I noticed the green light on my dash wasn't working (leccy fan) so I immediately thought "fuse blown". Anyway, after the session had finished I got towed back to the pits, opened the bonnet & sure enough a fuse had blown. For some unknown reason I had brought the kitchen sink but not any fuses :roll: Plenty of people with spares though. :D So I replaced the fuse & moved the leccy fan & leccy water pump to a different one, thinking it may have been over-loaded. Off I go for the next session, did about 2 laps then coming past the pits it did the same thing again. Of course I now have to wait for 10 minutes for the session to end to be towed back in again. Once is annoying, twice is embarrassing. :oops:

Bonnet up, same fuse blown. It must be a short somewhere me thinks. Only the leccy fuel pump & leccy ignition left on that one. So I traced the lead for the fuel pump & found the cause in about 5 seconds, the lead had wedged itself under my seat mounts, chafed & then shorted. I was both pleased & annoyed at the same time. Pleased 'cause I wasn't going back out 'til I found the cause of the problem but annoyed that I let something so trivial spoil one of my sessions.

Anyway, that was about the only problem that any of the Triumphs had all day I think, except for a Spit driver who had to purchase a silencer as his car was too noisy.

Myself & "Sierra brake" Jon had some great tussles, his Sprint was quicker in the corners but mine was quicker down the straights. I think his Sierra front ARB helps but in truth I think he's just plain better than me (he has done a lot more track days than me). Mine is a lot quicker than his out of the corners but that will be down to the 4.1:1 final ratio, he's running standard ratio. Both cars are pretty even on power.

I was just touching 130 mph at the top of Avon Rise so all you clever bods out there, what was my actual (approx.) speed, running on 185/60 13s ?

Here are some pics taken by professional photographers kindly nicked from Chris (2Toledos) from the CT forum. Hopefully some videos to follow.

Robin is in the Yellow Sprint, Chris (2Toledos) in the Toledo & Fred (a very nice young lady) in the 2000.
Image

Chris again, me & Jon (Trackerjack) in front.
Image

_________________
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


1997 TVR Chimaera 450


Image


Top
   
 Post subject:
PostPosted: Tue Jul 10, 2007 9:39 pm 
Offline
TDC Events Officer
User avatar

Joined: Tue Oct 03, 2006 4:50 pm
Posts: 5723
Location: Next to my Computer
Was that 2000 standard? it looks like it might scrape the door handles on a hairpin. Top effort though. 8)


Top
   
 Post subject:
PostPosted: Tue Jul 10, 2007 9:58 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 5:48 pm
Posts: 8446
Location: Winscombe, North Somerset, England
Quote:
Was that 2000 standard?
Absolutely, I don't think they come any more standard than that.

_________________
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


1997 TVR Chimaera 450


Image


Top
   
 Post subject:
PostPosted: Wed Jul 11, 2007 10:32 am 
Offline
Future Club member hopefully!
Future Club member hopefully!
User avatar

Joined: Tue Oct 03, 2006 5:42 pm
Posts: 3937
Location: Forest of Dean
Quote:
I was just touching 130 mph at the top of Avon Rise so all you clever bods out there, what was my actual (approx.) speed, running on 185/60 13s
105 I make it.

_________________
1978 Pageant Sprint - the rustomite, 1972 Spitfire IV - sprintfire project, 1968 Valencia GT6 II - little Blue, 1980 Vermillion 1500HL - resting. 1974 Sienna 1500TC, Mrs Weevils big brown.


Top
   
 Post subject:
PostPosted: Wed Jul 11, 2007 2:29 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!
User avatar

Joined: Tue Oct 03, 2006 5:42 pm
Posts: 3937
Location: Forest of Dean
Arghhhh can't do it! Can't just state stuff without working or reasoning.

Accounting for diff:
130 / 4.1 * 3.45 = 109.4mph

Circumference of standard tyre:
Sidewall = 170 * 0.7 = 119mm
Rim = 330mm
Circumference = pi * d = pi * 2xSidewall + Rim = 1784.4mm

Circumference of fitted tyre=
Sidewall = 180 * 0.6 = 108mm
Rim = 330mm
Circumference = pi * d = pi * 2xSidewall + Rim = 1715.3mm

Difference beween standard and fitted:
1715.3 / 1784.4 = 0.961

So correct for tyres:
109mph * 0.961 = 105.1mph

Took a bloody site longer to write that than the original calculation took!
:oops:

Overall correction factor to remember is:
1 / 4.1 * 3.45 * 0.961 = 0.8086

80% indicated speed near enough.

Tin

_________________
1978 Pageant Sprint - the rustomite, 1972 Spitfire IV - sprintfire project, 1968 Valencia GT6 II - little Blue, 1980 Vermillion 1500HL - resting. 1974 Sienna 1500TC, Mrs Weevils big brown.


Top
   
 Post subject:
PostPosted: Wed Jul 11, 2007 4:28 pm 
I make it 103.5 mph as the standard tyre width is 175 not 170.

David


Top
   
 Post subject:
PostPosted: Thu Jul 12, 2007 11:23 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 5:48 pm
Posts: 8446
Location: Winscombe, North Somerset, England
Some more pics, half inched from the CT forum:-

Image


Image


Image


Image


Image


Image

_________________
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


1997 TVR Chimaera 450


Image


Top
   
 Post subject:
PostPosted: Fri Jul 13, 2007 11:45 am 
Offline
Future Club member hopefully!
Future Club member hopefully!
User avatar

Joined: Tue Oct 03, 2006 5:42 pm
Posts: 3937
Location: Forest of Dean
:thumbsup: Ta. Fitted tyre is 185 too.

Accounting for diff:
130 / 4.1 * 3.45 = 109.4mph

Circumference of standard tyre:
Sidewall = 175 * 0.7 = 122.5mm
Rim = 330mm
Circumference = pi * d = pi * (2 x Sidewall + Rim) = 1806.4mm

Circumference of fitted tyre=
Sidewall = 185 * 0.6 = 111mm
Rim = 330mm
Circumference = pi * d = pi * (2 x Sidewall + Rim) = 1734.1mm

Difference beween standard and fitted:
1734.1 / 1806.4 = 0.959

So correct for tyres:
109mph * 0.959 = 104.5mph

Overall correction factor to remember is:
1 / 4.1 * 3.45 * 0.959 = 0.8069

Still 80% indicated speed near enough.

_________________
1978 Pageant Sprint - the rustomite, 1972 Spitfire IV - sprintfire project, 1968 Valencia GT6 II - little Blue, 1980 Vermillion 1500HL - resting. 1974 Sienna 1500TC, Mrs Weevils big brown.


Top
   
 Post subject:
PostPosted: Fri Jul 13, 2007 6:57 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 5:48 pm
Posts: 8446
Location: Winscombe, North Somerset, England
Thanks Tin & David. I've now saved your calcs so that I can refer to them in future. :D

_________________
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


1997 TVR Chimaera 450


Image


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 15 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 6 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited