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hd/hr holden

Hi, i am in the middle of restoring a Hd holden sedan and would like some advice on a few options for me.
Ok, Firstly i have a Hr front end with disc brakes. Is that straight forward to put in? Are there any how to guides to do it?

Secondly i have a stroked 186 red motor(to 202) with extractors and twin su strommys and would like a bit of info on how to set it up. I would like some power for street but to over the top. I would also like a bit of fuel economy for longer drives. What would be the best way to set this motor up? I have read some info on holley carbs and tripple su or webber carbies and don't know what to do. Also was thinking of going a yella terra head, roller rockers and maybe a cam. Any ideas for a average cost? or people or places to source parts from.

Thirdly i have a cast iron celica 5 speed gearbox to put behind the red 186. Would this be recconmended and is there any info on doing this installation? I assume the rear diff would be standard and was thinking of a LSD maybe a salisbury or banjo? Is there a cost effective and easy diff to put under the back to give good highway driving alongside the motor and box as mentioned above? As long as it has fairly good torque down low and good cruising highway compatability.

Sorry about all of this but i am really confused as to all the differant posts. I need someone who really knows what do do with my situation. If someone could help me i would be much appreciated, Thankyou, Adam

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firstly hr front end is simple to put in, second , stay away from roller rockers as they are alot of money for next to no more bang for your buck, i suggest u keep the banjo defenently go the lsd but if u are going a 5 speed i would run a 3.55 centre i am running a 5 speed and a 3.55 and i cannot run around in 4th gear i use 3rd around town , if u go a hight eg low 3 or 2.78 u will be dropping back gears to go up hill on highway or u will be planting your foot to get up them waisting more fuel the combo i am running is a 186 5 speed 3.55 with stage 3 head and twin strommys on an x2 manifold , both my strommies have fully adjustible main jets , so i can wind them out when i want to race , then wind them back in when i want economy, if tuned well i have found these are a better option than the holley and triples, if uhave anymore questions feel free to ask mate . cheers cory. ps , these are a small engine so dont go to big on cam, hx grind (xu1 cams are about the biggest u would go , but i wouldnt run that with this combo , talk to an engine builder( not mechanic) about cams to get one matched to ur specs ,

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Thanks heaps for all your input. To answer concerns i have a complete front end of a Hr holden.I am interested in the x2 stommy set up for my Hd. I think it sounds like a good idea to run the twin carby with adjustable mains. Will this be enough fuel/power for a stroked 186 motor? Or will it hold the motor back? Secondly i am planning on having the odd drag at the lights so i think that the 3.55 diff would be a good set up for me. I assume mine is a standard diff so what do i need to change it over to. What gear ratio is standard Hd? Are all Banjo LSD? Can i just slip standard gears out and Banjo lsd 3.55 in? What about the talk of smashing the diff under lots of tailshaft power? will this be a problem with my 186 setup?

I will call a engine builder any ideas around Brisbane Qld?

In regards to the motor if i put a Y/T stage 3 head and Xu1 cam on will it be too much compression? What other heads could i go? blue 202? Or stick with the 186 head. What about getting the standard head worked and set up for ulp. Is that a better and chaeper option for me? So i think i will stay away from roller rockers so with my set up just keep original rockers?

thanks Adam

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Well, a few things I can tell you for sure - the banjo diff will be fine for normal driving, as will the celica box - it's only when you get into the burnouts that you have troubles. Second thing is, do not use a Holley (well not a 2 barrel anyway). They just do not run right on a Holden 6, not matter what you do (speaking from experience). Stick with the twin Strommies (assuming you have the X2 set up - there is no such thing as a 'SU Stromberg'!).

With a 5 speed and a 3.08 diff you do have to change down to 4th for big hills along the highway, but the extra economy is worth it (although I am changing to a 3.55 or 3.36 - hopefully LSD - for club motorsport, mainly hillclimbs). I haven't had any troubles with using 3rd or 4th around town - the revs are around the same in 3rd at 40 or 50 than they are in most cars in 4th at the same speed - and I usually use 4th with no trouble.

Lastly, I have to agree with ghengis in saying that you should have a talk to an engine builder (or two) to get the best results.

Johnno

[http://gallery.oldho...|My Shed]

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Cheers,
Nate

Postcode 2450
'64 EH Special - '82 Series 1 Bluebird GX - Series 2 Bluebird TRX rally project
[http://gallery.oldho...|My Shed]
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oo

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johnnoEH said that holleys do not run on holdens i would almost agree , basically a 2 barrell will allways have flatspots no matter how much tuning, but i happen to know that if u do a certain trick with the venturies u can get them run run very well, but i still prefer twin stroms with adjustible mains ( alot easier to tune for certain applications), and the reason i said 3.55 diff ratio is because i assumed since your putting a cam in it i thought u might be having the odd race from the lights, if this is not the case i would runn the 3.36 lsd or possibly higher , and if u still have hd stub axles u can fit vn commodore brakes quite easily which are an awesome upgrade, and for around 120 dollars at the wreckers

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I've had the venturi trick done (fit smaller venturis or something, it was a few years back so can't remember) and it is still crap, it does go hard above 3 grand when it can burn the fuel, but anything under that is useless.

Steer clear of Holleys at all costs, simple as that.
I'm going to a set of 150CDs, but hve been looking into a set of triple downdraught (Bendix) Strombergs, to keep with the theme of the car (old-school 60's/70's modded, apart from the 5 speed).

Johnno

[http://gallery.oldho...|My Shed]

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Cheers,
Nate

Postcode 2450
'64 EH Special - '82 Series 1 Bluebird GX - Series 2 Bluebird TRX rally project
[http://gallery.oldho...|My Shed]
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Manifold sensitive carburettors (CD's, SU's, Quadrajets) are much more ignition tolerant.

T

[http://www.oldholden... | Holdenpaedia]

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T

My Shed

Holdenpaedia, they're the brakes Mate.

I know, it has a HEI dizzy on it, which made a world of difference compared to the old points dizzy.

I probably should get the damn thing regraphed, but there's no one that I know of around where I live that can do it.

Besides, I'm weighing up whether or not to put in a new cam and everything in when I get the 179HP and triples into it, which means I'll just have to put up with it until then or have it done twice, which seems pointless.

Johnno

[http://gallery.oldho...|My Shed]

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Cheers,
Nate

Postcode 2450
'64 EH Special - '82 Series 1 Bluebird GX - Series 2 Bluebird TRX rally project
[http://gallery.oldho...|My Shed]
Email Me

can anyone tell my what parts i need to fit vn commodore brakes to my hd holden, thanks Adam

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Yep, Hoppers Stopper can...

Cheers...Dave

"Search more, Post less"

>E-mail Me
Qute's Shed

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i guess it must depend on who plays with a holley , my mechanic had mine run like a dream , but twin strommies are the way to go , u need the old school look , i even got the cast headers(x2) and x2 air filter just to complete the look.

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Thanks heaps for all your input. To answer concerns i have a complete front end of a Hr holden.I am interested in the x2 stommy set up for my Hd. I think it sounds like a good idea to run the twin carby with adjustable mains. Will this be enough fuel/power for a stroked 186 motor? Or will it hold the motor back? Secondly i am planning on having the odd drag at the lights so i think that the 3.55 diff would be a good set up for me. I assume mine is a standard diff so what do i need to change it over to. What gear ratio is standard Hd? Are all Banjo LSD? Can i just slip standard gears out and Banjo lsd 3.55 in? What about the talk of smashing the diff under lots of tailshaft power? will this be a problem with my 186 setup?

I will call a engine builder any ideas around Brisbane Qld?

In regards to the motor if i put a Y/T stage 3 head and Xu1 cam on will it be too much compression? What other heads could i go? blue 202? Or stick with the 186 head. What about getting the standard head worked and set up for ulp. Is that a better and chaeper option for me? So i think i will stay away from roller rockers so with my set up just keep original rockers?

thanks Adam

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I had a mild 40 thou over 186 with a std yella terra head, a cam just 2 sizes above std, 9.2 compression ratio regraphed electronic dizzy and vk commodore 5 speed with 3.55 diff in my lx torana. Of all carbies i tried the smoothest running and most fuel efficient and powerful carby was a 4 barrel quadrajet on a cain 4 barrel manifold. Top speed of over 200 kmh, fuel consumption of 11 litres per hundred k's, quarter mile of 15.7 and i could drive it in 5th with the tacho at just 1100 rpms with no hesitation. It was like fuel injection compared to other carbies. I had the small primaries tuned lean for economy and the variable secondaries tuned richer for power. Valve guides last longer with roller rockers. I ran std rockers and the side loading wore my valve guides out big time. I also never had to tune my car for the whole 11 years and 300,000 k's the engine was in my car except for spark plug change.

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