![]() |
|
Welcome to the Australian Ford Forums forum. You are currently viewing our boards as a guest which gives you limited access to view most discussions and inserts advertising. By joining our free community you will have access to post topics, communicate privately with other members, respond to polls, upload content and access many other special features without post based advertising banners. Registration is simple and absolutely free so please, join our community today! If you have any problems with the registration process or your account login, please contact us. Please Note: All new registrations go through a manual approval queue to keep spammers out. This is checked twice each day so there will be a delay before your registration is activated. |
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 | ||
RS The Faster Fords
![]() Join Date: Feb 2014
Location: Westralia
Posts: 1,691
|
We recently lost the Mk1 Cortina forum and fordcortina.com.au sites and with them alot of info and chat on the Mk1 Cortina GT500.
I thought I'd start this thread to gather back some of this info and shed some light on this model. Firstly I'm no expert on the subject and welcome corrections, contributions and chat on this model. The Cortina GT500 ![]() After the success of the Cortina GT's in the 1963/64 Armstrong 500 Harry Firth was commissioned to build a new homologation variant to take on the threat of the Mini's. With a few exceptions of cars bought in for motorsport Australian Cortina GT's were typically 4 door sedans. The GT500 was based on the 2 door shell. Under the rules of the time imported cars required 250 items whereas locally built cars required a number of 100. Reported numbers of the GT500's built vary from 100 to 120. The GT500 placed first and second in the 1965 race in the hands of Bo Seton/ Midge Bosworth and Bruce McPhee/ Barry Mulholland. This was mainly due to having to take less stops with the fitment of an extra 8 3/4 gallon fuel tank taking capacity up to 17 gallons in total. Identification GT500's were assigned the model code 27134. Externally they received a '500' badge on the rear quarter in front the GT badge. ![]() There was twin fillers for the auxiliary tank behind the rear windows and the original rear filler was crudely blanked off. ![]() ![]() There was also aluminium brake ducts on the front of the car. ![]() ![]() To allow the car to run the race without an air filter one was supplied, but in a brown paper bag in the boot upon purchase. Amongst other modifications the 1500GT engine had a higher compression ratio, ported head, revised camshaft and copper/ asbestos head gasket. Specs taken from here https://www.uniquecarsandparts.com.a...specifications Capacity: 1498cc Type: Conventional, watercooled four stroke, reciprocating piston type, 4 cylinders, OHV Cross-Flow Bowl-In-Piston featuring 5 main bearing cast-iron crank-shaft, with integral weights dynamically balanced Configuration: Front mounted, longitudinal, inline Head: Pushrod and rocker actuated ohv with integral guides cast into fully machined cast iron ported and polished cylinder head, with special copper asbestos head gasket. Other modifications: Dynamically balanced 5 bearing cast iron crankshaft with integral weights running in new type steel back copper lead bearing liners. Lightened and balanced flywheel and clutch assembly together with a special crankshaft pulley of machined steel. Connecting rods and H-section forging with steel backed new type copper lead bearing liners. Special conrod bolts with enlarged bolt-head and and lock tabs. Camshaft ground to revised specification. Cast aluminium alloy inlet manifold and dual barrel down draught carburettor with revised chokes and jetting. 3-point rubber suspension of engine and gearbox. Fuel System: Single dual barrel down-draught Weber with differential throttle opening. Modified choke, emulsion and jet sizes Bore and Stroke: 3.187 x 2.86 inches Power: 95.0bhp at 6000rpm Torque: 101.5lb-ft (Nm) at 3600rpm Compression Ratio: 9.5:1
__________________
Escort RS2000 Restored factory a/c and alloys. TD Cortina Unrestored 35 000km 6cyl manual. Mk1 GT Cortina Project. FG XR50 Daily. |
||
![]() |
![]() ![]() |
![]() |
#2 | ||
RS The Faster Fords
![]() Join Date: Feb 2014
Location: Westralia
Posts: 1,691
|
On too a few rumours, maybe someone can shed some light on these.
Apparently the first batch of 20 cars were supplied without sound deadener. These cars were to be the racers with the others being built just to make up numbers. Not as much attention was lavished on the road going cars. I've also heard over the years that the racers were only given a light coat of primer and paint to help save more weight. The camshafts seem to be a point of debate aswell with the racers possibly receiving a hotter cam than the run of the mill versions ![]()
__________________
Escort RS2000 Restored factory a/c and alloys. TD Cortina Unrestored 35 000km 6cyl manual. Mk1 GT Cortina Project. FG XR50 Daily. |
||
![]() |
![]() ![]() |
4 users like this post: |
![]() |
#3 | ||
Regular Member
Join Date: Jul 2020
Posts: 124
|
Sorry to hear the old forum has gone. Try this and see what you can salvage:
https://web.archive.org/web/20200324...p?action=forum |
||
![]() |
![]() ![]() |
2 users like this post: |
![]() |
#4 | ||
FF.Com.Au Hardcore
Join Date: May 2010
Posts: 1,868
|
was it lost due to inactivity because of facebook or other sites?
|
||
![]() |
![]() ![]() |
![]() |
#5 | ||
FF.Com.Au Hardcore
Join Date: Apr 2012
Location: Taromeo
Posts: 10,454
|
Pretty sure it was inactivity combined with lacking the time and enthusiasm to keep it going. The lady who ran it unfortunately passed away and her partner was devastated, naturally. He didn't have the will to keep it up.
|
||
![]() |
![]() ![]() |
2 users like this post: |
![]() |
#6 | ||
Powered By EcoBoost
Join Date: Mar 2011
Location: Central Qld.
Posts: 3,483
|
[QUOTE=Rallye Sport;6588720]
Externally they received a '500' badge on the rear quarter in front the GT badge. I always thought that 500 badge may have been pre production prototype for the Falcons that arrived a few years later with the 500 badge, but the ones in the photo definitely wipe out my thoughts on that, looks like a different font. I have seen GT 500 at a local car show around here in Central Qld, a year or so ago.
__________________
http://www.fordforums.com.au/showpos...&postcount=206 |
||
![]() |
![]() ![]() |
This user likes this post: |
![]() |
#7 | ||
FF.Com.Au Hardcore
Join Date: Apr 2012
Location: Taromeo
Posts: 10,454
|
Jamie Cornwall has just finished his 500.
|
||
![]() |
![]() ![]() |
![]() |
#8 | |||
RS The Faster Fords
![]() Join Date: Feb 2014
Location: Westralia
Posts: 1,691
|
Quote:
__________________
Escort RS2000 Restored factory a/c and alloys. TD Cortina Unrestored 35 000km 6cyl manual. Mk1 GT Cortina Project. FG XR50 Daily. |
|||
![]() |
![]() ![]() |
![]() |
#9 | ||
Starter Motor
Join Date: Aug 2021
Posts: 1
|
I am organising a photo shot at Bathurst for a coffee table book on the GT500 cortina. The club also has reproduced the factory handbook selling at $37 incl pnp on a cost recovery basis. Contact Peter Walker Cortina GT500 club on 0450117360 or cortinagt500club@gmail.com
|
||
![]() |
![]() ![]() |
2 users like this post: |
![]() |
#10 | ||
Ute Forum Moderator
![]() Join Date: Dec 2004
Location: Melb
Posts: 7,227
|
My Dad had a Cortina 440 as his first car, and got a GT500-spec engine put in it by Harry Firth back in the day. He said it would do 110mph flat out.
|
||
![]() |
![]() ![]() |
This user likes this post: |