63 replies to this topic

[S pack]

There at times has been some confusion between Street version XU-1's and race built XU-1's.
Race specials were built, and these did not generally get sold to the general public, but over time several have ended up in private hands.
All XU-1's were produced for racing, however the majority of them never ever saw a race track.

Many in the past have confused the race XU-1 specs to the street versions, ( myself included ),And you are still confused me thinks.

the CAMS documents in the Fiv Antoniou book for example, are actually refering to race special specifications and things likes camshafts were not as specified for street going XU-1's. What the???

A hint as to how higher performance camshafts were fitted can be seen in the topic on this site about 71 Bathurst XU-1's, in this it states that higher perfomance cams were available but only fitted on a special request. Yeah, the dealers had to sell and install 200 of them to their customers road going XU1's to allow the new XH cam to be used in the race cars.

Some of these specifications, accordingly are at odds with the parts books, things like the flywheels according to the parts books were all the same for late 72 and all 1973 street going XU-1's. ???

The parts books do however contain mistakes. Yes, and GMH advised dealers when mistakes were found and recommended the dealers amend their catalogues, unfortunately a lot of dealers probably didn't carry out those instructions.

shortage of revisions for the later models. Would you have liked GMH to produce an updated LC or LJ parts catalogue with every new homologation of the XU1???

and do not show some supersessions. Part number supercessions were contained in separate books.

There are many differences between street version XU-1's, Just look at all the Homologations that occurred.

Holden built race versions. The Bathurst specials???

and race team built XU-1's

Edited by S pack, 21 December 2011 - 10:06 PM.

[xu2308]

Well the Race Teams would have to follow the C.A.M.S Rules to Race the LJ's, so the
Race LJ's should be all the same in theory under C.A.M.S Rules, we know the HDT Race LJ's were faster
as the Fox did what he could to the HDT LJ XU-1's under the rules that did not break them but made
his Cars alot faster

[yel327]

You have to remember also that a Parts Catalogue is not or never was a historical document. It was GMH's way of making sure a Nasco (later GMP&A) outlet could sell current parts to allow a vehicle to be kept on the road. When the first issue of a catalogue was released it was normally mostly correct. However later revised editions replaced parts with bits off later series, one good example is front guards for HK. In the later Parts Catalogue revisions the original 74 prefix HK guards were replaced with 28 prefixed HT and HG part numbers. The same applied for most other parts, right down to buying a brand new 1-tonner chassis for a HQ in 1989 got you a WB chassis for example. LC/LJ were no different.

Interesting aside, people cannot get a straight story about these cars 40 years on. People who built them are still around! This observation alongside my research for the Sandman book makes me wonder about other stuff in todays society that people argue and fight over. Like God, Jesus, Mohammed, the Bible, the Koran, the Torah etc. They all argue that their book and their beliefs are correct and fact. Not everyone can be right! If we cannot get XU-1 history and facts nailed after 40 years, how can 2000 year old stories be perfectly correct!

Edited by yel327, 22 December 2011 - 12:10 PM.

[xu2308]

Same with the V8 LJ Prototypes, before 2002 the Lone o Ranger V8 LJ was Destroyed at Lang Lang, but
not the case as Vic Roads have the proof of this by Rego Records.
Was the PINK LJ V8 Destroyed, ????????? i dont believe it was, as the Lone o Ranger LJ left
GMH with its Big Fuel Tank and Twin Fillers, so if any car should o been destroyed it should of
been the orange car not the pink car you would think,but it was SOLD in 1974

[meanmachine72]

There at times has been some confusion between Street version XU-1's and race built XU-1's.
Race specials were built, and these did not generally get sold to the general public, but over time several have ended up in private hands.
All XU-1's were produced for racing, however the majority of them never ever saw a race track.

Many in the past have confused the race XU-1 specs to the street versions, ( myself included ),And you are still confused me thinks.

the CAMS documents in the Fiv Antoniou book for example, are actually refering to race special specifications and things likes camshafts were not as specified for street going XU-1's. What the???

A hint as to how higher performance camshafts were fitted can be seen in the topic on this site about 71 Bathurst XU-1's, in this it states that higher perfomance cams were available but only fitted on a special request. Yeah, the dealers had to sell and install 200 of them to their customers road going XU1's to allow the new XH cam to be used in the race cars.

Some of these specifications, accordingly are at odds with the parts books, things like the flywheels according to the parts books were all the same for late 72 and all 1973 street going XU-1's. ???

The parts books do however contain mistakes. Yes, and GMH advised dealers when mistakes were found and recommended the dealers amend their catalogues, unfortunately a lot of dealers probably didn't carry out those instructions.

shortage of revisions for the later models. Would you have liked GMH to produce an updated LC or LJ parts catalogue with every new homologation of the XU1???

and do not show some supersessions. Part number supercessions were contained in separate books.

There are many differences between street version XU-1's, Just look at all the Homologations that occurred.

Holden built race versions. The Bathurst specials???

and race team built XU-1's

well said dave.... lol lol lol more smoke and mirrors from mike73

[Dr Terry]

Another thing that is often forgotten is that the XU-1s raced under 2 different sets of rules (3 of you count 1970,71 & 72 ATCC).

1970, 71 & 72 were raced under Series Production regulations, while 1973 onwards raced under early Group C regs. Group C regs had many more freedoms in areas like wheels, tyres, carbies, camshafts etc. etc.

Cars that ran in the 1973 Bathurst had SUs or Webers, & much bigger cams & wheels than factory issue.

Dr Terry

[Litre8]

I heard the same on the 58mm webers, one of the venturis on each carb was blocked/blanked as you could only have the same number of venturis as the factory original (3 x zenith-strombergs).,

[Dr Terry]

^^^^^^^ Correct, Brock's car had 3 Webers with one venturi in each carb blocked off & Bond's car had SUs.

Harry was having an each way bet. Brock's car had more grunt while Bondy's car had better economy. Wait a minute didn't that cost Brock the race win, I think it did.

Dr Terry

[Dr Terry]

So you say they only ran the Webers in 1972?

No, Brock lost the 1973 race because his ran out of fuel when Doug Chivas was driving.

The 72 cars were Series Production which meant bog stock carbies right down to the needles & jets.

Dr Terry.