Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 16, 2005 16:40:42 GMT -5
:)I have 1976 c10 292 Custom Deluxe with Automatic Transmission.
In brief, I want to keep it in as close as original condition as possible, but still to have fun with it.
At this moment, the body and engine are in good condition, but there are some bugs, some I can spot and other I can't.
You see, the C10 with straight 6 are suppose to be a good engine, 4.8l with 120kw, but I cant seem to get more than 100-110km/h (62-68miles/h) from it. Is that normal or should I seek deeper? >:(To add, at 80km/h (50 miles/h) The fuel consumption is about 4.5km/l (don't know what's that per us gallon) for an Automatic transmission.
You see, the mechanics over here don't seem to know all that much about the 292, not to many of them here. So I must fend for myself.
Should I throw the 292 engine out and add V8 diesel for more HP or should a take some tips.
Will welcome all suggestions.
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Post by 19_Chevelle_69 on Nov 16, 2005 23:08:50 GMT -5
First off, I would check the ignition timing, and general tuneup condition of the engine. Fuel filter, plugs, wires, distributor cap and rotor, before trashing the I6 for a diesel.
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Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 17, 2005 2:07:54 GMT -5
What will be the best mileage and speed under ideal conditions I could get with the current specs, just to tell me how far from the average I am. :-XI know these Automatic 292 is a real thirsty truck, but what must I look for before any mods? How many Hp to 1KW? I see the real Power motors are about 500Hp. Many Tanks Johan
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Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 17, 2005 6:01:23 GMT -5
Check the photo section for some picks!
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Post by 19_Chevelle_69 on Nov 17, 2005 17:47:03 GMT -5
1 horsepower = 0.745699872 kilowatt
You would probably expect to see maybe 10-14 MPG which works out to 23.5 - 16.8 litres per 100km travelled. (4.4 to 6.1 km's per litre) Looks like you are getting about the correct mileage for your engine.
Top end speed is directly related to the rear axle gear ratio. The 292 does not like to rev high, so if you have steep gears in the differential, the engine will run out of breath in the top end.
From what I found, 120kw converts to 160hp. I think this is a VERY generous estimate, I'd bet the actual HP of the engine is in the 120-140hp range with a MonoJet 1bbl carb.
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Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 21, 2005 15:48:39 GMT -5
???Will It be worth the while to replace the old Mono jet Carb with a 2 of 4 barrel Holley or Weaber Carb? Will adding fuel injection help?
What kind of air filter will job for this truck. I'm looking for something as the original filter I can't get locally- they don't supply it in SA any more.
PS, Why did Chev dropped the 292 in 87, was it just to old an technology which they cant improve or whey?
Thanks for all your support.
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Post by 19_Chevelle_69 on Nov 21, 2005 19:18:28 GMT -5
The 292 was an engine that made less HP, and used more fuel than the V8. No sense beating old technology to death, so they just dropped it.
You may be able to find a 2bbl "2 Jet" carb that would bolt on to that manifold, but you'd still need an air cleaner.
Jusr about anything will work for an air cleaner, you may have to get creative and figure out how to connect it to the carb, but anything is possible.
As far as FI goes, I wouldn't spend the time and money on that on your 292. Just drop a V8 gas or diesel in it and forget about it.
Oh, by the way .... PM me if you need a head gasket and a tappet cover gasket I have one of each in stock......
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Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 22, 2005 3:58:03 GMT -5
As I'm still working on getting information on what will be the best things I can do for my truck, I'm still appreciate all your input.
As the old Horse next year turns 30, I think the first major thing might be to give her a face lift. A new paint job. All women love It. With replacements for all that little things like rubbers and light covers.
But as a later project I may swap for an V8 as the newer engines are readily available in SA. In the mean time, some low cost improvements on the 292 might just help that much.
As one of you said PLAN PLAN PLAN before starting. I don't know all that much about cars, but I'm a fast learner with some good teachers.
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Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 22, 2005 4:22:31 GMT -5
I currently have The GM 12 bolt differential with 8-7/8" ring gear.
As my speed is up to 'shift' I think (before verifying) I have the 3.08 ratio Ring & pinion. As the 292 in South Africa have the reputation as the best towing vehicle it might be why.
As I farm and sometimes tows a few cattle or sheep it are really needed as the Truck don't struggle with it, but the towing are about 5% of the usage I might be tempted to change this.
Considering that I may want to tow a caravan in the future with the occasional livestock transport, I thought why not improve the speed (and gas efficiency) by swapping the gear ratio. I rather pay mare gas for the occasional transport. I know It will not tow the same, but with a light weight trailer, I can't see why not. If a 1.8l Toyota ldw can do it, the 4.8l 292 will still be able to do the job on the day.
What will you guys go for
3.08 (witch I think are current) 3.42 3.73 4.11
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Post by 19_Chevelle_69 on Nov 22, 2005 18:51:23 GMT -5
The 3.08 is good for mileage, the 4.11 is good for low speed towing. If you are already concerned with fuel mileage, and the towing seems to be fine with your current axle ratio, I'd leave it the way it is.
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Post by Bent on Nov 23, 2005 0:10:27 GMT -5
[glow=limegreen,2,300]I say stay with the 3.08 so Don won't delete my profile. ;D Just kidding Don, don't remove me........I'll give you candy. [/glow]
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Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 23, 2005 1:53:03 GMT -5
As I told you, I don't know all that mush of all things automotive as jet, but that are changing with the help of you guys.
I thought with diff ratio more was more speed, but clearly I was wrong. I think then I might have the 4.11 ratio. Before ordering a replacement, i will at least check, but that seems a job on its own for I must open op the diff,
Thanks
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Post by bigblue78 on Nov 23, 2005 8:55:58 GMT -5
Hey Terry Its a really easy job to check your gear ratio you can defintely do this yourself. Plus you will be changing your gear oil which probably needs to be replaced anyway. You will need to get a new gasket for the cover (count the bolts before buying 10 or 12) and some gear oil (80W-90). First loosen the cover bolts, gently pry the bottom of the cover from case and drain the fluid then simply remove your cover and bolts. Clean and mark a gear tooth with a white crayon and rotate your gears using the drive shaft and count all of the gear teeth on both the pinoin and the ring gear then simply divide the smaller pinion gear into the larger ring gear and there you have it your gear ratio. Then clean up your old cover and bolt it on with your new gasket. Then you will need to pull out the drain plug located on the front side of your diff case to fill until the fluid meets the fill hole. Dont forget to put the new fluid in. Diffs dont like to be driven without fluid Good luck on your truck it is always very satisfying doing the work on your truck yourself.
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Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 23, 2005 15:43:32 GMT -5
Thanks BB78, I was thrown into the deep end with this truck (Inherited from late father-in-law). From the first time I saw her , I loved her, but had no Idea how to treat her, after all, she stood for 7 years in the farm shed. Anyway, when I needed new brake shoes, I did not hesitate to do the job myself, as with a service prior to that, a local Mac could not even get the rear brake drum off. Well, after some gentle persuasion with the hammer, she finally opened up to me and I could take the old pads out and had them re-build, as no supplier had stock. (That was before LMC come into my life.) With the re-installation, I did quite a good job, tap my self on the shoulder and set out to bleed the system. After all how hard could that be as I saw it being done a couple of times. No need to tell you I did not succeed and asked for help. I am to embarrassed to tel you all why (If anyone can gues I will gave him a brend new icecraem toster). In any case now I can do it. So, after one mistake I learned and are still learning. THANKS
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Post by Bent on Nov 30, 2005 1:39:26 GMT -5
[glow=limegreen,2,300]That's how I learned..........Or i just ask the Donald LOL[/glow]
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