42 replies to this topic

[GTR600]

Does any one know the number series the single stromberg had in the LJ GTR's...if thats possible ?

 

In the process of finding a single if not correct number for mine...one here in Perth with 23-3050 which I believe looks to be a single..

[Cook]

Hi Brock.  Can't help with your query but from what I have read the gurus will need to know the build date of your car to get accurate info.  Cheers Ron

[claysummers]

23 3050 is 173 manual, in late LC, LJ and HQ.


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[claysummers]

You want a 3084 if it is a manual car.


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[GTR600]

Yeah its a manual, Cheers Clay most appreciated.

[GTR600]

Old thread so a small change of subject wont hurt...

 

Any body know what type of air cleaner came on the LJ GTR ?.....did it have a flute like common tory & kingswoods...or round with cut outs like the 186S pics ive seen ?

[yel327]

Depends on if it is an ADR27 type clean air engine or earlier from memory. These kicked off around 9/73, basically as XU1 compliance ended, which was roughly when ADR27 was originally intended to be applied.

[GTR600]

Not sure...my production date was 6/72 - engine L166042

Edited by GTR600, 28 April 2020 - 04:36 PM.

[S pack]

6/72 had the chrome air cleaner like the LC GTR.

[GTR600]

Cheers Dave....The carby number I might not find.....or matter too much, but the air cleaner I hope to at least.

[yel327]

Carby should be easy. Every pre 8-9/73 manual HQ 202 should have had one, and the bulk of HQ 6cyl were still manual. Should be multiple 10000's of them out there. Lots of LJ's and a significant amount of later HG commercials with them too. The down side is they are only 6cyl's so much of it all went to scrap over the years as no-one wanted them. We used to just wheel the rails out from under HQ-HZ with 6cyl and the whole front end, engine, box (unless a 4spd) etc went to scrap. Same with banjo diffs. Only V8 parts and panels were really wanted to keep the Taxi industry plus all the utes and 1-tonners alive. Gem used to buy a lot of later red 6's to reco but lots went to scrap. You wouldn't believe what I used to see at the local scrap yard, dozens of complete red 6's in piles with Ford 6's ready to be furnace melt. I rescued a few good ones like JP, 186K etc by sheer chance, but who knows how many good ones got through? 

[u1 71]

The Lj GTR carby had a larger main jet size compared to the standard 6 cyl one you could possibly source the main jet through MIDEL in sydney

Edited by u1 71, 28 April 2020 - 06:58 PM.

[claysummers]

You could put LC GTR induction on there if you’re not fussed about the originality. Hard to pick the difference with the GTR filter on there. You can run the stock 202 exhaust manifold and will still see a bit of a performance improvement.


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[S pack]

The Lj GTR carby had a larger main jet size compared to the standard 6 cyl one you could possibly source the main jet through MIDEL in sydney

LJ Torana

Main metering jet 3300 eng - manual (exc XU1) .067"

Main metering jet 3300 eng - auto .065"

[yel327]

HG low or high comp 202 is 0.065" main jet as well. HQ will be the same but manuals quote it in cc.

[rodomo]

LJ Torana
Main metering jet 3300 eng - manual (exc XU1) .067"
Main metering jet 3300 eng - auto .065"

Is that a measurement or a drill size?
.067" is over 1.5mm?
A 67 Drill = .8128mm

Edited by rodomo, 28 April 2020 - 11:01 PM.

[S pack]

Is that a measurement or a drill size?
.067" is over 1.5mm?
A 67 Drill = .8128mm

OMG, I think you are right Rob. That measurement will be drill size not inches. I assumed the sizes quoted for the 6cyl engines were inches as the measurements for the 4cyl engines jets were notated as being mm.

[yel327]

GMH make it difficult. In the HQ Engineering Features document they say 380 c.c for 6cyl main jet, 0.050 INS for 253 and for 308 and 350 (Quadrajet) they say 76C, 77C and 71C.

 

Then for power by-pass jet the say 2 x DRILL #51 for L6 and for 253 say 1ST .020", 2ND .064. 308,350 says (PRIMARY) .026.

 

The LJ document is the same, it says DRILL where they mean it, like the IDLE TUBE/JET is listed as DRILLL # 67 for 3300 manual except XU1.

 

So .065 would be .065" based upon the fact they actually say DRILL where they mean it. The LC Features manual shows .060 for the 173 main jet and it is quoted as ins.

 

Having a different main jet and idle jet for manual and auto seems to be an LJ only thing, they do the same for the 2850 engine, but not in HQ or HJ. It is also shown as a difference in the August 1973 revision of the document which may possibly be an ADR27 related thing. The earlier revisions of the LJ document don't show a difference for auto and manual just like HQ doesn't. LC shows no difference for auto and manual for 2600 or 2850 but there is a hint of a change associated with Trimatic in the June 1970 revision so it is possible it is a Trimatic related thing in Torana. I know in HT-HG the 186 had the 186S camshaft but when Trimatic was fitted the cam used was the same as the HK 186 camshaft, so the manual kickdown Trimatic may have had some slightly different tune requirements too.