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Fact or Fiction.

Started by _76lxJAS_ , Aug 10 2015 10:02 PM

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#351 _sstorana_

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Posted 19 August 2015 - 05:12 PM

HEy Dr Terry,
quick question..

Why did some of the Engines go to an "X" prefix?

couldn't see anything in your book.

cheers

Mick

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#352 yel327

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Posted 19 August 2015 - 05:55 PM

That's an easy one Mick. It is for ADR27A auto 6cyl Holden (as in HX-HZ) engines used in LX and UC. The X was stamped at the assembly plant to show it was going into an LX (later UC). Exact same principle and the 11, 12 or S prefix used for engines into Statesmans. The manual versions remained as Torana engines and didn't need the X.

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#353 _sstorana_

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Posted 19 August 2015 - 09:52 PM

Thanks Byron,

any idea why the engine prefixes changed in Sept 78?

cheers

Mick

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#354 S pack

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Posted 19 August 2015 - 10:01 PM

Thanks Byron,

any idea why the engine prefixes changed in Sept 78?

cheers

Mick

HQ engine number sequence reached 999,999 during HZ so new prefix required for number sequence to start over ie: ZL1001

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#355 Dr Terry

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Posted 20 August 2015 - 08:18 AM

HEy Dr Terry,
quick question..

Why did some of the Engines go to an "X" prefix?

couldn't see anything in your book.

cheers

Mick

Byron has explained why, but these prefixes are all listed under their respective model applications.

Dr Terry

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#356 _sstorana_

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Posted 20 August 2015 - 08:40 AM

Dr Terry,

Why was there a change in the engine prefixes on the 1 Sept 1978?

cheers

Mick

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#357 yel327

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Posted 20 August 2015 - 09:36 AM

There wasn't for Torana engines Mick, they continued with H prefix and their own sequence. Only the auto 6cyl engines changed inline with the chance from Qx to Zx in HZ but it wasn't September it was closer to December.

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#358 Shiney005

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Posted 20 August 2015 - 10:45 AM

In one ATCC race, the HDT placed 1st, 2nd, and 3rd.
Fact or Fiction.

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#359 yel327

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Posted 20 August 2015 - 11:34 AM

In one ATCC race, the HDT placed 1st, 2nd, and 3rd.
Fact or Fiction.

Wanneroo Park 1978?

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#360 _sstorana_

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Posted 20 August 2015 - 12:06 PM

Byron,

Torana Engines for LH, LX and UC were as follows;

LH

2.85lt Hi Comp (LD1) - HD Prefix,

2.85lt Low Comp (LD2) - HE Prefix,

3.30lt Hi Comp (L20) - HL Prefix,

LX (prior to 1 July 1976 (ADR 27A))

2.85lt Hi Comp     (LD1)    - HD Prefix,
2.85lt Low Comp (LD2)    - HE Prefix,
3.30lt Hi Comp     (L20)     - HL Prefix,

3.30lt Low Comp (L23) - HM Prefix,

LX (Post 1 July 1976 (ADR 27A))

2.85lt Hi Comp (LD1) - HD Prefix,
2.85lt Low Comp (LD2) - HE Prefix,

2.85lt Low Comp (LD2) - XQE Prefix (Auto Trans),
3.30lt Hi Comp (L20) - HL Prefix,

3.30lt Low Comp (L23) - HM Prefix,

3.30lt Hi Comp (L20) - XQL Prefix (Auto Trans),

UC (prior to 1 Sept 1978)
2.85lt Hi Comp (LD1) - HD Prefix,

2.85lt Hi Comp     (LD1)    - XQD Prefix (Auto Trans),
2.85lt Low Comp (LD2)    - HE Prefix,
2.85lt Low Comp (LD2)    - XQE Prefix (Auto Trans),
3.30lt Hi Comp     (L20)     - HL Prefix,
3.30lt Low Comp (L23)     - HM Prefix,
3.30lt Hi Comp (L20)     - XQL Prefix (Auto Trans),

UC (post to 1 Sept 1978)
2.85lt Hi Comp     (LD1)    - HD Prefix,
2.85lt Hi Comp     (LD1)    - XZD Prefix (Auto Trans),
2.85lt Low Comp (LD2)    - HE Prefix,
2.85lt Low Comp (LD2)    - XZD Prefix (Auto Trans),
3.30lt Hi Comp     (L20)     - HL Prefix,
3.30lt Low Comp (L23)     - HM Prefix,
3.30lt Hi Comp (L20)     - XZL Prefix (Auto Trans)

Edited by sstorana, 20 August 2015 - 12:08 PM.

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#361 yel327

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Posted 20 August 2015 - 12:58 PM

That cannot be correct Mick, as Z prefixed engines didn't appear in cars until around Nov-Dec 1978. They may have started stamping engines in September with the Z prefixes but Q prefixes were still being put into cars in 10/78 into 11/78. The engine plant at Fisherman's bend didn't specially make engines for auto 6cyl Torana either, they were simply sent out as a Holden auto engine and it was the assembly plant that stamped the X into them, so when Z prefixes started in Holden they'd start in Torana at the same time.

I have the Service Bulletin somewhere that states the date they started, i'll have a look tonight.

The LD2 auto engine in later UC is XZE too, you have it as XZD

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#362 _sstorana_

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Posted 20 August 2015 - 02:01 PM

Byron

just going off what is in Norm's book and Dr Terry's book.

I had a look through my service bulletins and couldn't find anything. If you have to, can you tell me the group and date please?

cheers

Mick

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#363 EunUCh

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Posted 20 August 2015 - 05:50 PM

f or f ?

The V8 Holden engine was based upon a Chev V8 but ended up being "unique" in design by being the lightest V8 of the era?...and...the plastic has won more Panoramic titles than any other V8?

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#364 yel327

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Posted 20 August 2015 - 07:32 PM

Byron

just going off what is in Norm's book and Dr Terry's book.

I had a look through my service bulletins and couldn't find anything. If you have to, can you tell me the group and date please?

cheers

Mick

Mick

Couldn't find the 1978 stuff tonight, only 1979. Will look in archives tomorrow.

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#365 _ChaosWeaver_

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Posted 20 August 2015 - 07:37 PM

f or f ?

The V8 Holden engine was based upon a Chev V8 but ended up being "unique" in design by being the lightest V8 of the era?...and...the plastic has won more Panoramic titles than any other V8?

Fact...........

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#366 yel327

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Posted 20 August 2015 - 08:11 PM

I would have though the alloy Rover V8 of that era would have been lighter?

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#367 Shiney005

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Posted 20 August 2015 - 08:53 PM

Wanneroo Park 1978?

Yep. Brock Harvey Negus.

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#368 a9x868

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Posted 20 August 2015 - 09:07 PM

In one ATCC race, the HDT placed 1st, 2nd, and 3rd.
Fact or Fiction.

laurie

i,ve got a photo print of that!

fact!

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#369 _Mint_

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Posted 20 August 2015 - 09:33 PM

f or f ?
The V8 Holden engine was based upon a Chev V8 but ended up being "unique" in design by being the lightest V8 of the era?...and...the plastic has won more Panoramic titles than any other V8?

thought it was based on a Pontiac v8?