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HK1837 Offline
#121 Posted : Saturday, 5 August 2017 10:20:56 AM(UTC)
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I'd still get it on a chassis dyno first to make sure all is OK, and there isn't something wrong like the dizzy of fuel. Then see what it is like - you may be able to live with it.
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castellan Offline
#122 Posted : Saturday, 5 August 2017 9:33:39 PM(UTC)
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Originally Posted by: HK1837 Go to Quoted Post
The fairest comparison would be a stock 202 in a HG versus a stock 186 in a HG, same gearbox, same exhaust, same everything.

If you change the inlet and carb on a 307 4spd HK GTS ordered with N10 exhaust the only difference between that car and a GTS327 driveline wise is the extra 1/8" bore. That is 6.5% more cubic capacity and thus a compression rise from 8.75 to 9.x:1. According to GM the 327 going from 4BBL to the 2 barrel loses 30hp, and i'd expct it to be similar (like 25-30hp) on the 307 going up to the 4BBL.

On a similar story my mate had a HQ 1-tonner with Aussie M21 and 3.36 diff. It had a dead stock 307 in it pulled from an old Premier. He stuck some old 462 fuellies on it and a standard HK 4BBL and Quadrajet. Admittedly it had the bigger heads (worth 25hp on a 327), but it went like stink. Used to pull like a train, was infinitely better than an 308 I've ever driven. Sure the 308 probably revved harder, but outright balls this thing was unbelievable for what it was. You could pull out and overtake a semi uphill with a car float and a full HK on the trailer and it'd feel like it was going to launch itself. I had similar experience with my old FJ40 with a HT 307 in it, standard engine down to the carby and there is no way a stock 308 would pull like that old 307 used to. You must have had a bigger cam in that HQ, bigger than the stock 253 cam anyway!


The 202 would kill the 186 with torque in HG ute.

Yes I would say good torque out of a 307 not to mention the 327, it's a good rod ratio that can be made to work well and that's the trick to why they perform so well.

You maybe correct with the cam in my Gem reco, maybe it's was a HJ 308 type regrind.

Edited by user Saturday, 5 August 2017 9:40:09 PM(UTC)  | Reason: Not specified

HK1837 Offline
#123 Posted : Saturday, 5 August 2017 9:56:01 PM(UTC)
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And possibly HJ spec pistons? The only difference HQ to HJ was the cam and smaller piston dish, and by GMH dyno curves that equated to 21 peak hp.
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castellan Offline
#124 Posted : Saturday, 5 August 2017 10:39:00 PM(UTC)
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Originally Posted by: KBM Go to Quoted Post
my FJ75 has recently been upgraded from a red 253 that was out of my old HT wagon to a blue 308 out of a WB statesman that's been rebuilt and only upgrade is a cam to suit straight gas. the same gas research system on both motors. I wish I rebuilt the 253. on flat ground the 308's fine, and so was the 253, but when you hit the hill it's crap. the 253 out performed the 308 easily. My standard 307 wagon is much better than the 308 up the same hill, except for the sharp corner where the powerglide doesn't kick down and takes a bit of time to reach 90kms again but it's only got a two barrel. the hill is my way home every day and in 8kms rises about 600m.


My stock 253 HG would flog a stock blue 308 any day, I mate put a WB Statesman 308 in his WB 1 Tonne with a VP 5Speed behind it and 3.36 diff, extractors and 3 inch mandrel single exhaust and it did not go hard at all and then he put a Crow torque cam in it as he was a Builder towing a huge trailer, it still was a slug that would not eat a HG 253, but his 308 may of made more torque.
He thought it went well and I said it was a just a slug, my 308 would of killed it.

I had a Dyno tune on my 308 that had a small cam and L34 valves and that bastard made it loose a lot of power, he recon that I could not afford to drive it the way it was jetted d'oh! I had been driving it for 6 years and getting 22MPG on the highway with that jetting and after that prick it got 16.5mpg and the vacuum advance happened to not work after that clown messed with it and one hill I drive up I had to put my foot down going up it, when it never used to.

With that crap jetting it loss power so much so that it was unbelievable, so a carby jetted the correct way can make it perform a hell of lot better.

Now with this in mind HK1837 Says if I remember correctly that the carby jetting is no different in the pre emission 308's to the emission ones, but I have seen that the Ford V8 jetting is different as time goes on from the first ADR27A and the V8 F100 is different to the cars jetting, maybe the main jet is the same but the metering rod is a different part number and I am sure that the Holden V8 do change with ADR27A, but they will be lean I am sure and that means gutless to me, not to mention that to rich makes it gutless as well. but just the right getting makes the big difference.

I spend the time mucking about jetting my dirt bikes just right and it sure is worth it as the factory settings are rubbish with every new bike I have had.
castellan Offline
#125 Posted : Saturday, 5 August 2017 11:19:14 PM(UTC)
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Originally Posted by: HK1837 Go to Quoted Post
And possibly HJ spec pistons? The only difference HQ to HJ was the cam and smaller piston dish, and by GMH dyno curves that equated to 21 peak hp.


One of my best mated had a HJ van 308 4sp all the same as mine extractors etc but a TQ20 cam, he got up it in 3rd gear down this road having a run and mine just walked past his, he thought he was going to do mine in, I remember what he said to and all, f that thing of yours goes ! and that was when it was a stock engine, when I put the 20/60 Waggot cam and stage 3 heads and fully balanced it went much better than it did before, but I had a auto in it by then because the M21's were costing me a fortune, but she would lift the nose up when she went into top gear and that's with good GT130 shocks on the front.

I did not put high comp pistons in it when I got it done up, I said no to that and when I went to 0.060 with it I just used stock compression pistons.
The original Gem engine looked like HQ pistons with a great big dish just like the 2 others I used later.

I don't really believe in high compressions or I am not a fan of it really, unless it needs it due to the type of cam grind you use and then it has to fall within the parameters of such and due to the fuel you use, I would still caution on the lower rather than the higher.

I have seen that many crap engines blow up, not to mention never go that well due to running way to much of a high compression for street pump fuel octan ratings.
castellan Offline
#126 Posted : Monday, 7 August 2017 5:16:28 PM(UTC)
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Myth that Kingswood's ended in the HZ model.
Andrewq37 Offline
#127 Posted : Saturday, 12 August 2017 10:00:28 AM(UTC)
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Continuing the myth concept of this thread, i cant see any HX LE stuff so far,so here goes my list of comments that make the blood boil

HX LE are left over HQ bodies! (what about HJ'S)
LE's were all painted white and resprayed on the line!
An old one but a goody,Holden used the 600 left over bodies (from HJ production)(pressing not bodies before anyone gets on that ban wagon)(Firewall also different than HJ so no they did not unpick the firewalls and weld in HX ones!)to make the LE, think about it people were do you hide 600 bodies at pagewood from March of 76 thru to July/August?
Holden made 350 versions!
First/only Holden to use honeycomb wheels (no HJ/HZ)gold ones yes.
Pin stripping are decals, (hand Painted using mask kit) (maybe some late production but i have yet to confirm this)


I could go on but you get the idea.



wbute Offline
#128 Posted : Saturday, 12 August 2017 12:48:19 PM(UTC)
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Not sure on what you say is myth and what's truth with the LE's?
HK1837 Offline
#129 Posted : Saturday, 12 August 2017 4:30:45 PM(UTC)
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LE were HJ bodies in white (not painted white). The bulk were always intended to be LE as LE was supposed to be a HJ. I can't recall the exact number but it was close to 620 bodies assembled late in 1975, some became HJ, a few became Nasco bodies. GMH made more than 580 LE but some were destroyed in a fire in WA, we have identified these cars as holes in the records (missing PSN's).
The firewalls were changed on the HJ bodies that became HX LE.
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Warren Turnbull Offline
#130 Posted : Sunday, 13 August 2017 1:20:55 PM(UTC)
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An HX LE is NOT an HQ or HJ body shell.

HX have a different firewall to a HJ and every HX LE that I have asked the owners of when they pull them apart has found no sign of the HJ firewall being removed and a HX one fitted.

If they were HJ bodies and they did remove the firewall and place another in it would have to go back through the dip etc.

It would have been easier to either:

1) Leave the HJ harness connector and make a special wiring harness
2) Make a plate to fit over the HJ Harness connector and use a HX harness

You are right in that the HJ was suppose to include the LE but delays meant it was released in HX, with special mentions in option books etc.

Plus it was not to use up excess coupe parts as there would not have been 600 sets of tinted glass and power window mechs, most would have been standard "if they were left over".

I could see that they had a number of body pressings sitting around such as 1/4 panels etc but not whole cars.

Andrewq37 Offline
#131 Posted : Sunday, 13 August 2017 6:58:46 PM(UTC)
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So far all i have managed to find with regards to a fire in WA is a dealership witch burn down on a Saturday morning, (from GM Pointer magazine)

As all cars are assigned a PSN when allocated a position on the line, i can't see any complete cars getting to a dealer in WA without as PSN, total number of complete LE's burnt in the fire were 3, from the photo it looks like about 20 Holden's could have been damage and or right off's

Total number of LE PSN's recorded and listed as completed production are 580 + whatever NASCO wanted as spare bodies, Maybe Warren knows if any were Knock downs or Nasco body's shipped to WA for assembly? Could explain the body count everyone talks about!

Warren Turnbull Offline
#132 Posted : Sunday, 13 August 2017 8:47:01 PM(UTC)
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No Monaro was sent to WA for final assembly, not from HK to HX.

Warren
HK1837 Offline
#133 Posted : Sunday, 13 August 2017 9:08:54 PM(UTC)
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They don't have PSN's in the Service/Warranty report as the cars were never sold hence no warranty activated.
I have it from two sources that once Leo finished his HJ prototype that Pagewood assembled the final HJ coupe bodies ready to be either the final HJ coupes (up to 3/76 approx) and the rest were to be HJ LE. Delays saw the conversion to HX. Leo has personally told me about the pressure to get the LE dome as the bodies were already welded together. Plus the Pagewood maintenance foreman told me the same. He also told me about multiple LE bodies ex Pagewood body plant with smashed rear windows after a really cold night. Imagine that fiasco, having to get another X number of rear screens to finish them ready for assembly.
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SLENUT Offline
#134 Posted : Monday, 14 August 2017 4:43:45 PM(UTC)
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The Commodore SL/E fanatic.
wbute Offline
#135 Posted : Monday, 14 August 2017 5:15:35 PM(UTC)
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From what I can see, the HX LE myths quoted are not myths. I have read Leo Pruneau being quoted as saying the firewalls were changed. They were not cars built to use up left over parts, they had no dramas supplying those. Even the rear windows that broke would not have been that big a drama. The bodies were built from the left overs. There was an unexpected loss of interest in two door cars. You have to appreciate that 600 bodies is really not many.
As for evidence they had the firewalls changed, what would you see? And if they had built them with the HX firewall there is no way they wouldn't have released a cheaper version than the LE as well. Why on earth would they carry on and build just 600 (approximately)HX two door cars when they couldn't flog the HJ ones? That makes no sense at all. They would have all gone out the gate as HJ.

Edited by user Monday, 14 August 2017 5:18:07 PM(UTC)  | Reason: Not specified

Warren Turnbull Offline
#136 Posted : Monday, 14 August 2017 6:04:41 PM(UTC)
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To remove a firewall and the spot welds would need to be drilled out, not a quick thing. Then they need to spot weld in a new one. Do you fill the holes from the old spot welds first or do you spot weld in a different spot?

Either way there would be signs of this happening.

If the car had been assembled it would have been sealed so all the sealer around the firewall would have to be redone after the new firewall was installed.

When you consider the only real difference is the hole for the engine bay and lighting harness to come through why would you not just make a plate with a hole in it for this purpose, the HX hole is smaller and in the same area.

No disrespect to Leo, but by the time these cars go into production he has nothing to do with them, and there would be no real reason for production to tell him too much. He normally found out what production was up to when the cars came out and he asks "what happened to .....?" They can then spin him any yarn to justify.

When Leo was asked to put the car together the management had decided on 600 units, now for what ever reason, Leo may be genuinely under the belief that the bodies were already together, but if that was the case of 620 bodies left then only 20 more HJs would have been assembled and the remaining 600 reserved. So how many HJ coupes were built after the Prototype LE. If it is more than 20 then this debunks that theory. Now you could say the other 20 units were also made, as only 580 Les were made, so is it more than 40 units? If so then definitely incorrect information given to Leo. Ben Stewart is the only person who can answer those two questions.

Another question is when are the trim clips welded to the body? As LS have these along the sill, so if you did weld up 600 bodies and prime them to protect them, when are you going to add these to the LS bodies.

The broadcast sheets also have the drilling operations for A/C, Power windows, speedo cable, are these done before the car goes through the "dip", if so then you cannot weld up 600 bodies, put them through the "dip" then drill holes and put back through again if they were to be made into HJ LEs.

As I have stated, I am yet to find a HX LE with signs of a new firewall fitted, but please help me out if you have personally seen it.

Warren
HK1837 Offline
#137 Posted : Monday, 14 August 2017 6:35:17 PM(UTC)
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I think you have to think outside the square with these. I believe John Bagshaw saw the LE as an "I want" and we all know what that means. Leo was right in the thick of it as Bagshaw would have bought the car up in meetings. It was delays in all the "one off" components that saw the delays, plus massive pushback from production. Leo recalls dummy spits IIRC from Lloyd Beck at the time.
Also as a body in white I don't think they have been fully sealed or dipped yet, or possibly not in the case of these.
To remove a firewall it is like any other panel you are removing, you gas axe or otherwise cut inside the perimeter and then grind off the remaining steel. I always remove panels like this. A sharpened bandsaw blade and hammer will pop half the smaller spotwelds if you hammer along the seam.
Ben has run all the numbers, he knows how many are missing as for some odd reason all LE's are spaced by the same PSN gap. He has counted the number of HJ coupes after the LE paperwork.
Both Ben and I have seen some roughy examples stripped for resto and they were ugly as hell where the firewall was re-instated. I think Ben has photos.
Aircon holes are done later on every factory A/C car I have ever seen.
The other possibility here too is that maybe not ALL
were made prior to HX, we only have evidence of "large amounts" of coupe bodies in white, no evidence of 600 odd. What I'm getting at is maybe they prepped half of them if it was the case that a low volume body was a pain to do as required.
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Warren Turnbull Offline
#138 Posted : Monday, 14 August 2017 8:07:51 PM(UTC)
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OK lets say you have 600 bodies welded together with no from end. That's 3m x 2.5m 600 = 4500 square meters or 9 rugby league fields. If they are not under cover they are sitting out in the weather. As they have no glass etc you have to have them primed and sealed, or you are going to have rust in all the seams etc.

Unless Pagewood has 9 rugby league fields of under cover parking.

But if you have seen that the firewall has been replaced then I must take your word for it. But knowing production I cannot understand why they would not have simply plated the wiring harness hole. 4 screws and some sealant as apposed to ripping the whole thing out.

Warren
wbute Offline
#139 Posted : Monday, 14 August 2017 9:04:43 PM(UTC)
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Who knows. They could have stored them somewhere else. There are big sheds about. Yennora Wool stores are 120000 square meters under cover for example. 600 car shells would only take up a corner of them if they stacked them two high for example.
Shearer Offline
#140 Posted : Monday, 14 August 2017 9:09:48 PM(UTC)
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Another few LE coupe myths I was once told...

*Small batch LE coupes where painted in Jade Green
*Vinyl roof was optional
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