53 replies to this topic

[terry mcgrath]

50 4 cylinder XK motors
Whilst this is the figure quoted for the motors made I believe this is probably more accurate that jaguar had 50 sets of raw unmachined components made/cast ie 50 blocks, 50 cranks, 50 heads, 50 sets of cam covers, 50 sumps.
Jaguar would have then machined a few for trials one was fitted to an XK120 etc. Jaguar had cataloged and drawn up an XK100 ie 4 cyl XK120 capable of 100mph but found they couldn't make XK120's to meet demand and no point in making a baby version so project canned.
So only a few sets of components were machined up and assembled much of the unfinished unmachined items would have become scrap metal
Jaguar JHT have one this has engine/serial number stamped on it
Peter Briggs has one this has engine/serial number stamped on it
Walter Hill had a block he made the head and cam covers by shortening 6cyl parts
Roland Urban had one
there will be others.
When Jaguar did the Lwt E they ordered 30 motors and only planned to build 20 cars
XJ13 nev can advise better but at least 4 motors built
So not unusual to to make more items than maybe required
terry

Edited by terry mcgrath, 13 March 2011 - 13:04.

[bradbury west]

It seems it might have existed in the metal
http://cgi.ebay.co.u...-...75839&ps=50
Does anyone have access the Motor magazine?
Roger Lund

This is a blind alley as the article seems to refer to a simple twin Solex conversion on the 105E. HRG Eng were shown as in Oakcroft Road, Chessington, Surrey.
RL

[Nev]

50 4 cylinder XK motors
Whilst this is the figure quoted for the motors made I believe this is probably more accurate that jaguar had 50 sets of raw unmachined components made/cast ie 50 blocks, 50 cranks, 50 heads, 50 sets of cam covers, 50 sumps.
Jaguar would have then machined a few for trials one was fitted to an XK120 etc. Jaguar had cataloged and drawn up an XK100 ie 4 cyl XK120 capable of 100mph but found they couldn't make XK120's to meet demand and no point in making a baby version so project canned.
So only a few sets of components were machined up and assembled much of the unfinished unmachined items would have become scrap metal
Jaguar JHT have one this has engine/serial number stamped on it
Peter Briggs has one this has engine/serial number stamped on it
Walter Hill had a block he made the head and cam covers by shortening 6cyl parts
Roland Urban had one
there will be others.
When Jaguar did the Lwt E they ordered 30 motors and only planned to build 20 cars
XJ13 nev can advise better but at least 4 motors built
So not unusual to to make more items than maybe required
terry

A bit more info on the 4-cyl engines gleaned from a 1953 paper produced by WM Heynes ...

It wasn't a XK 4-cyl engine that was loaned to "Goldie" Gardner for his world record attempt. It was an earlier "XJ" 4-cyl engine that was used (12:1 compression; 2 litres; 80.5 x 90mm; modified pistons; 146 bhp @ 6000rpm). It was not the later "XK" 4-cyl engine. Three separate designs of the 4-cyl engine were built as prototypes before the final XK 4-cyl engine. They were:

"XF" (66.5 x 98mm; 1360cc)
"XG" (73 x 106mm; 1776cc)
"XJ" ((80.5 x 98mm; 1996cc)

There is an interesting comment in Heynes' 1953 paper on the hemispherical chamber design ... "... it is interesting to note that since the success of the Jaguar hemispherical head in the American market, one of the major American companies has realised the advantages, probably quite independently, and the author believes it will only be a short time before the other major companies follow this lead." Can anyone tell me which "major American company" was the first to adopt a hemispherical combustion chamber and was it, indeed, after 1953?

The link to the paper was posted on the Jag-Lovers forum - Heynes' 1953 paper

[scags]

Chrysler, if I'm not mistaken.