GM 292 Straight 6 - Yet another conversion - Defender Source
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  #1  
Old February 4th, 2018, 12:18 PM
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GM 292 Straight 6 - Yet another conversion

Laying out a conversion in a 110 of a "bolt in, bolt out" drop in GM 292 CUIN 4.8 Liter straight 6.

Chevy and General Motors used the Chevy 292 engine in their pickup trucks from 1963 to 1990, with production shifting from the United States to Mexico after 1984.
The 292 was a six-cylinder, inline engine that was not interchangeable with the other smaller displacement straight 6 engines.
The Chevy 292 was known for being powerful, durable and reliable.

The Chevy 292 inline, six-cylinder engine has a bore and stroke of 3.875 inches by 4.125 inches and a compression ratio of 8.0-to-1.
It achieved a maximum 165 gross-horsepower at 3,800 rpm and netted 147 horsepower at 3,600 rpm.
It reached its maximum gross torque of 280 pound-feet at 1,600 rpm and netted 262 pound-feet of torque at 2,000 rpm.

Perfect match up to the stronger Ashcroft R380 stumpy with larger bearings mated to the 1.22 transfer case.
Best of all it fits the Defender style engine bay and has room on the sides of the engine for a PS pump, AC compressor, hydraulic pump for a winch, whatever...

Anyone sick of Land Rover TDI issues who wants a simple dependable engine that you can get parts for anywhere, that any good mechanic can work on, that will tow a trailer up-hill, and will start in cold winters, that doesn't want to drop big money down on a LS conversion, should be interested.

This conversion will bolt in and can be accomplished in a weekend.
More to come...
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Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
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  #2  
Old February 4th, 2018, 12:31 PM
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Yup..Great engine... Ran a 292 in this 109 as my daily driver for several years..
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  #3  
Old February 4th, 2018, 01:42 PM
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Quote:
Originally Posted by phoenix37 View Post
....Ran a 292 in this 109 as my daily driver for several years..
http://www.tzr.io/yarn-clip/4bf3fae6...9-aa9a97a85807
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  #4  
Old February 4th, 2018, 01:53 PM
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Got my attention.
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  #5  
Old February 4th, 2018, 02:01 PM
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thats exactly right..back in the day.. that truck ripped..could chirp the tires in 3rd gear.
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  #6  
Old February 4th, 2018, 05:19 PM
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At 19 I had a 1960 88SW II with a Chevy inline 6. I had a 67 with its original 2.25 at the same time.

I loved the inline 6's torque and wished I had had the funds to make it more drivable.
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  #7  
Old February 4th, 2018, 07:04 PM
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I am sick of the under powered and unreliable and Land Rover TDI engines that barley keep up with traffic and can't tow anything up hill.
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RDavisinVA

Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
UD: "Just Power through it man!"
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  #8  
Old February 4th, 2018, 07:15 PM
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But, if your gonna swap, why go I6 rather than V8?
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  #9  
Old February 4th, 2018, 07:22 PM
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Quote:
Originally Posted by cowboy View Post
But, if your gonna swap, why go I6 rather than V8?
Maybe cause it’s 30K if you do not do it yourself?

But, hey, I love me some stinky LR diesels!
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  #10  
Old February 4th, 2018, 07:29 PM
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Quote:
Originally Posted by KGH View Post
Maybe cause it’s 30K if you do not do it yourself?
I meant V8 as in Rover v8, Chevy 350, etc...
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  #11  
Old February 4th, 2018, 08:52 PM
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I rather like inline engines myself though I'm currently committed to diesels. My first thought was this tread would be about the new GM inline 6 diesel coming out in the new 1500 pickup.
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  #12  
Old February 4th, 2018, 09:31 PM
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Quote:
Originally Posted by cowboy View Post
But, if your gonna swap, why go I6 rather than V8?
Which V8, Rover?
It's just as problematic as a TDI.
Chevy V8 will destroy an R 380, as will a vortec V6.

As stated in post 1... Goal is "bolt in, bolt out" and conversion will bolt in and can be accomplished in a weekend.
That means bolt up to an R380 stumpy also stated in post 1.
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RDavisinVA

Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
UD: "Just Power through it man!"
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  #13  
Old February 4th, 2018, 10:25 PM
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You fail to mention smooth as silk. An inline 6 has perfect harmonics and is not noisy or throaty. Just builds smooth power. Also, long stroke inline 6 is the perfect engine for off road as it will idle along like a diesel crawling over anything.
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  #14  
Old February 4th, 2018, 10:48 PM
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Looks like they are smooth running engines - Damn!

Also exhaust manifold is on opposite side of driveshaft for easy downpipe setup.

Robert - did these come with electronic fuel injection?

I think they are about the same weight as a small Rover diesel - around 500lbs. That low end torque seems impressive - probably very nice off road
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  #15  
Old February 5th, 2018, 06:46 AM
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Quote:
Originally Posted by o2batsea View Post
You fail to mention smooth as silk. An inline 6 has perfect harmonics and is not noisy or throaty. Just builds smooth power. Also, long stroke inline 6 is the perfect engine for off road as it will idle along like a diesel crawling over anything.
Exactly Bill and nice video, Don.

So you can install almost anything provided you have the time and money.
While the straight 6 will drop in, the Chevy 350 V8 or Vortec will not.
The chevy straight 6 will bolt right up to a R380 stumpy, the Chevy V8 is not compatible, so then you need to change to a different transmission, and that requires different driveshafts or perhaps different diffs, and a different tunnel, and different gauges and then you may as well have done an LS conversion.

The 292 will be a weekend bolt in conversion that will use the Land Rover clutch with a Land Rover transmission.
On Monday, you have the new exhaust installed...
And provide enough power to do more than keep up with traffic, to pass most everyone, and tow a trailer up hill, these are all things a Rover TDI struggles with.
Did I ever mention that I have grown to despise the under-powered and unreliable Rover TDI engines?

Since the 192 engines were used in domestic vehicles until 1990, I wonder if they would pass emissions testing in places like CA, CO, NOVA, DC, MD, and so on where that if you match a federalized engine of the same year as the vehicle, then you can be approved places.
Just a thought.
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RDavisinVA

Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
UD: "Just Power through it man!"
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  #16  
Old February 5th, 2018, 07:43 AM
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This is just what I'm looking for.
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  #17  
Old February 5th, 2018, 07:45 AM
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Chris B
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Have two sixes in the family fleet. One a Honda 3.5 V6, the other Volvo’s I6 3.0 Turbo. Both are so much nicer than Rover v8 or the I4.
Ignoring the issue of why yet another engine transplant, are you saying that the Chevy bolts straight up to the r380 without an adapter?
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  #18  
Old February 5th, 2018, 07:48 AM
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Quote:
Originally Posted by don View Post
Looks like they are smooth running engines - Damn!

Also exhaust manifold is on opposite side of driveshaft for easy downpipe setup.

Robert - did these come with electronic fuel injection?

I think they are about the same weight as a small Rover diesel - around 500lbs. That low end torque seems impressive - probably very nice off road
Offy makes a sweet intake with a standard four barrel square flange that allows a FiTech (which are fantastic by the way) EFI to bolt up. All in it would be less than $2k (manifold, EFI, fuel pump, and accessories) for worry free operation regardless of altitude or attitude.

https://www.summitracing.com/parts/ofy-5416/overview/

------ Follow up post added February 5th, 2018 07:49 AM ------

BTW, that’s vehicle attitude, not driver attitude.
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  #19  
Old February 5th, 2018, 08:05 AM
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I ran that offy intake with an edelbrock carb.. Don't recall paying much attention to the mpg.
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  #20  
Old February 5th, 2018, 08:10 AM
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Whata great substitute for the 100’s of MODs knocking around with painfully slow and uncomfortable NA’s.
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