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castellan Offline
#1 Posted : Friday, 6 December 2024 10:18:05 AM(UTC)
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When did the L34 Option end in the LH Toranas. I know they started 8/1974 to ? did they go to the end of the LH ?
Dr Terry Offline
#2 Posted : Friday, 6 December 2024 11:08:28 AM(UTC)
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AFAIK the L34 build began in July '74. The rules for racing dictated that Holden had to build 200 units before they were allowed to race. Given that the Sandown 500 in 1974 was held on 8 September & they only built 263 units, you would think that the total build time spanned July to September of that year.

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HK1837 Offline
#3 Posted : Friday, 6 December 2024 2:33:00 PM(UTC)
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GMH only built a number of L34 to get rid of the parts, and probably to provide some cars for racing. There was no need to build any cars under 1974 GroupC CAMS rules. It is possible the ARDC had supplementary rules over and above CAMS rules and that is why a certain number were built.

Note that LH was homologated for GroupC on 1/4/74 by which time GMH had built 500 x LH SL/R Torana (with 3300). The rules state for Variants and Evolutions they only had to build parts not cars. The first Variant (1/1V) was the SLR5000, not sure what date it was accepted. The third Variant (3/3V) is the XU2 but known as L34, recognised 1/8/74.

Although L34 vehicle build was only for a limited time, GMH says on Evolution 21/12E the L34 option was available right up until 1/9/77 when it was discontinued. It was replaced by LX SL/R5000 which has the same specifications as LX SL/R 5000 L34 with the following exceptions (which are all the bits that came on production A9X although no mention of A9X in homologation papers). On the next Evolution 22/13E it also says from 1/9/77 the LX SS 5000 model changes specification to be mechanically identical to LX SL/R 5000 plus the following (again bits off the A9X but no mention of A9X).
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Smitty2 Offline
#4 Posted : Friday, 6 December 2024 6:27:54 PM(UTC)
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Originally Posted by: Dr Terry Go to Quoted Post
AFAIK the L34 build began in July '74. The rules for racing dictated that Holden had to build 200 units before they were allowed to race. Given that the Sandown 500 in 1974 was held on 8 September & they only built 263 units, you would think that the total build time spanned July to September of that year.

Dr Terry


I have some GMH stuff on this.... the internal memo announcing it is dated August 1 1974, the L34 parts (inc High Output option) listing is dated August 1974
and
curiously a Zone Service bulletin dated 16 July 1974 advising them of the L34 option on Torana SLR models and to ignore, what is thought
ABNORMAL ENGINE NOISE. Because it is not.. and gives a number of reasons to ignore them
and
further, Norm Darwin writes that also on August 1 1974, Vic Zones Sales sent a memo to dealers ( I have a copy somewhere) advising of the model option
and the addition of an extra High Output option being available

In addition Norm is his "Torana Tough' book writes - -
3 pilot cars were run down the Dandenong VAP line on May31 1974
2 more pilot cars on June 9 and June 12
The rest started production on June 18 1974 and finished Sept 11 1974

none of that totally conclusive, just adds to the data pile on the particularly famous Holden model


HTH

Edited by user Friday, 6 December 2024 6:28:54 PM(UTC)  | Reason: Not specified

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castellan Offline
#5 Posted : Saturday, 7 December 2024 11:46:12 AM(UTC)
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So on sale from when then.
And a HP opt parts from 8/74 bigger camshaft grindone can put in yourself ?

I just bought an old book with a test regarding the LH SLR5000 and the L34 that was owned by Bruce Sutton rego BS.888 Called COMPERTITION CANNONBALL.
They talked about how much higher the L34 was because of the huge 14in wheels !
HK1837 Offline
#6 Posted : Saturday, 7 December 2024 7:10:22 PM(UTC)
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Originally Posted by: castellan Go to Quoted Post
So on sale from when then.
And a HP opt parts from 8/74 bigger camshaft grindone can put in yourself ?

I just bought an old book with a test regarding the LH SLR5000 and the L34 that was owned by Bruce Sutton rego BS.888 Called COMPERTITION CANNONBALL.
They talked about how much higher the L34 was because of the huge 14in wheels !


I'm not sure the "on sale" really has relevance to the L34 as it wasn't really for general sale. GMH didn't want it road tested, didn't want the publicity, didn't want the general public to buy it. At one stage the direction was it was only to be sold to those with a CAMS licence.

There was a HP kit for those that wanted to race the car. Cam, oil cooler, Holley (same carb as an XY GT-HO), roller rockers and other stuff.

There was an alternative gearbox available too with 2.32:1 first gear, that always came with a 3.08 rear axle. It wasn't geared any shorter than the M21 2.78 cars except for 4th gear though. You are right though that almost all SLR5000 and SS 5.0L manual were 2.78 rear axle (A9X was 2.60 for some cars), and to have that with 14" tyres was awful tall gearing. I remember a friend of mine had a HQ tonner with alloy tray, it had a 308 and M21 with 3.08 rear axle and standard 14" tyres, it was horrible in 1st gear, and with its alloy tray it wouldn't have weighed much different to an SLR5000. So I can imagine how bad an L34 would be. At least with an A9X if you got a 3.08 rear axle car it'd be far better than the 2.60.

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castellan Offline
#7 Posted : Sunday, 8 December 2024 10:22:24 AM(UTC)
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Originally Posted by: HK1837 Go to Quoted Post
Originally Posted by: castellan Go to Quoted Post
So on sale from when then.
And a HP opt parts from 8/74 bigger camshaft grindone can put in yourself ?

I just bought an old book with a test regarding the LH SLR5000 and the L34 that was owned by Bruce Sutton rego BS.888 Called COMPERTITION CANNONBALL.
They talked about how much higher the L34 was because of the huge 14in wheels !


I'm not sure the "on sale" really has relevance to the L34 as it wasn't really for general sale. GMH didn't want it road tested, didn't want the publicity, didn't want the general public to buy it. At one stage the direction was it was only to be sold to those with a CAMS licence.

There was a HP kit for those that wanted to race the car. Cam, oil cooler, Holley (same carb as an XY GT-HO), roller rockers and other stuff.

There was an alternative gearbox available too with 2.32:1 first gear, that always came with a 3.08 rear axle. It wasn't geared any shorter than the M21 2.78 cars except for 4th gear though. You are right though that almost all SLR5000 and SS 5.0L manual were 2.78 rear axle (A9X was 2.60 for some cars), and to have that with 14" tyres was awful tall gearing. I remember a friend of mine had a HQ tonner with alloy tray, it had a 308 and M21 with 3.08 rear axle and standard 14" tyres, it was horrible in 1st gear, and with its alloy tray it wouldn't have weighed much different to an SLR5000. So I can imagine how bad an L34 would be. At least with an A9X if you got a 3.08 rear axle car it'd be far better than the 2.60.



HX 1 Tonne v8 = 1365 KG plus the Tray = KG ? alloy Tray and all is plus over 150 KG for sure. Steel timber Tray may be near to 300KG ?
LH SL/R5000 L34 =1306 KG

I think Holden were playing the A9X as a long distance tourer, with 2.60 ratio. sadly they are not as good as the HZ 5.0L 4sp for fast driving over 180KM/H long distance.
Toranas get floaty and wind noise around the doors drives you up the wall at high speeds.

All Fords Fairlanes LTD with leaf springs were a danger to push over 180KM/H into bends bar the P van and Utes can be safer due to how the rear springs do not flex as much and walk about as it becomes the tail that is wagging the dog, I think the Last of the AU on utes rear springs were set up a lot better tho.

I do not think that the Holden 1 Tonne is good for over 180 KM/H driving as the rear springs are to hard, like the AU on Ford 1 Tonne but they have lighter rear springs for ute and lighter for XR6 and XR8

I found that the alloy tray on the AU on too light for serious high speeds, you need more weight in the tail to keep it to function better. or it will dart about. even the XG Longreach Ute would dart about over 8 tentnths if the road got a bit rough.

I tryed to buy a FG XR6 Turbo 6sp manual 1 Tonne ? put XR Springs in it and a heavy timber steel tray. but the dealer had a fit, It will swap enda on ya ! he claimed. No it wont as I am driving it and not you. Thats what I wanted ! as I did not like the ute tray.

But I kept the VY Commodore SS ute, now that's a great ute to drive hard and fast. just make sure the rear shocks are real good ones or it becomes a shit cart, as the IRS camber and toe goes spastic when it can move to freely up an down like and this will shoot ya off line or right off the road. and best with arounf 150KG in the back, but up to 260KM/H is fine as it sits down on the road.
The strut brace is magic always put one on from a VT on as they make the steering so much easyer to guide the road driving fast, as you do not need to make little corrections all the time. so you could drive from the QLD Border to Darwin flat out and still get out refreshed. So put such on on all Commodores from VB on !
castellan Offline
#8 Posted : Thursday, 12 December 2024 6:14:21 PM(UTC)
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Looks like the L34 Torana's 200 were made or maybe 400 in total all sold so my 1975 sportscar road test book is saying that i just bought.
They say they had the Bathurst 4sp box ratios 2.32 1st and 2ed 1.65, 3rd 1.25 with the L34 engine, that's why the Test makes the L34 so pathetic
So you have a L34 Torana with crap ratio 4sp box for the street, good for Bathurst track tho ! but that box ratios and a 2.78 diff and 14in wheels will make it perform like crap ! as the test shows 0 to 100 KM/H in 8.7 and 160 KM/H in 25.2 and the SL/R5000 with M21 4SP and 2.78 diff x 13in wheels is 0 to 100 KM/H 8.0 and 160 KM/H 24.1 LSD is an option on all as is 3.08 and 3.36 ratios on the L34, But only 3.08 ratio option. So the test is with a crap open diff, so they has to pussie foot taking off or you just bag it up like a fool.

It looks like Maybe not all had the L34 Engine in them, not to mention the big solid Cam and rockers is another story option.
But it may of been just another 200 with just a L31 engine like mine had on the plate. as mine had the can opener job on the rear guards. Just seen of late a Mock L34 and the rear guard had the flares sitting out stupid proud 10mm from being flush with the panel as the rear guard was std and no can opener job performed like real L34 Torana's were in fact.

When we see the XA GT RPO 83 ? Some came with some bits but not all came with all of the bits, like 4 bolt mains blocks or 780 Holley or baffled winged sump or other things. not to mention a lot of nonsense of finding a 4 bolt mains 351 in a 1973 F100 let alone a winged sump on a F100 because a F100 sump is behind to the rear of the engine and no V8 is in any F100 in Aus until 1977 or BS about 1973 351 v8 Fairlaines with 4 blot main blocks. they only had a 2V carby on them !
Not to mention the later XE19 Aussie cast blocks well that maybe so.

Also in the book it has a HJ GTS Monaro Coupe Test and they say that the 308 option with 4sp is the crap M20 4sp and that you had to fork out $28.42 to get a M21 4SP ! Sounds like crap, i have never heard of such as a M20 ratios are total rubbish with the torque of a 308, M20 is the best box with the 253 for sure. but here are the times with the HJ with M21 4sp and 3.36 diff open. and with dual exhaust option as tested.
50kmh 3.1
70 = 4.8
90 = 7.1
110 = 11.8
130 = 15.1
150 = 20.0
400m = 16.3
1st 75km/h @ 5500
2ed 139
3rd 139
Flat out best 188KM/H at say maybe 5300rpm that would be valve bounce with a 3.36 ratio.
They also say that the HJ GTS gets dual exhaust only as an option, and say the HQ 308 GTS was dual exhaust standard.
HK1837 Offline
#9 Posted : Thursday, 12 December 2024 7:40:08 PM(UTC)
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Sounds like that book belongs in the bin. Too much wrong stuff.
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 1 user thanked HK1837 for this useful post.
Smitty2 on 13/12/2024(UTC)
HK1837 Offline
#10 Posted : Thursday, 12 December 2024 7:40:22 PM(UTC)
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Double post.

Edited by user Thursday, 12 December 2024 7:41:36 PM(UTC)  | Reason: Not specified

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Smitty2 Offline
#11 Posted : Friday, 13 December 2024 6:53:02 AM(UTC)
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Originally Posted by: HK1837 Go to Quoted Post
Sounds like that book belongs in the bin. Too much wrong stuff.




... ditto me


(ps I have that particular edition and I didn't believe it then, still don't now!)

Edited by user Friday, 13 December 2024 6:53:40 AM(UTC)  | Reason: Not specified

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