GM 292 Straight 6 - Yet another conversion

E

ezzzzzzz

Well-known member
There are a lot of reasons not to use a rover V8. When they're running good they're as fine as any other. When they're not the repair cost is above your typical V8. The 90/110/130 platform comes with different chassis mounts dependent upon engine. So swapping a 200tdi for a 4.0 isn't as easy as you assume. The wiring modifications for a 4.0 swap isn't something that many here would understand or undertake. That's why so many choose someone like Robert to perform conversions of any type. The GM engines are reliable, cheap and parts are plentiful at any auto parts stores. I've run a 4.3 V6, have a LS1 in my IIA/90 project and a LT1 waiting to go into my 110 unless I opt to put a LR 4.6 V8 into it. I've owned over 30 LR's, some series, a 110, a few RRC, a P38, a LR4 and a crap load of D1/D2. I've had good luck with most of my V8's but not all. At present, I have two D2 sitting with wiped camshafts. One had a blown headgasket. Authenticity is fine if that's what makes you happy. I wouldn't own a non-turbo diesel 4 banger for any price and would be remiss to say I'd feel any happier with a 200tdi/300tdi (I've driven plenty). I know after over 4 decades of building vehicles (26 of those include LR's) that this conversion is a no-brainer for simplicity, cost, reliability and maintenance.
 
javelinadave

javelinadave

Administrator
Staff member
I’m a purist when it comes to Rover motors but I appreciate the engineering and effort that goes into an LS, Cummins, Mercedes or 292 swap. Definitely not my cup of tea but they all achieve something that a LR motor may not.
 
Robert

Robert

Well-known member
Red90 said:
Stock 292 on carbs... 165 hp at 3,800 rpm and 280 lb. ft. at 1,600 rpm. EFI and cam will free up the power and the monster torque off idle will remain.

Final Rover 4.0, 188 hp at 4,750 rpm and 250 lb⋅ft at 2,600 rpm.
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Its a 20% increase in displacement resulting in 8% more torque

The MPG does look attractive , but it will be interesting to see how bad that drops with efi when a stoich mixture is maintained instead of blowing NOx and CO out the exhaust.
 
Robert

Robert

Well-known member
Red90 said:
At 1600 instead of 2600 rpm. That is a huge difference in how the engine drives.
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Its not like a 4.0 makes 0 at 1600. Low rpm torque curves are hard to find so Ill leave that up to you, but my gut says a 4.0 makes greater than 80% of a 292 across the board
 
R

Red90

Well-known member
At peak power (165hp at 3800rpm) it is still at 230 lb-ft. It will be above the Rover curve the whole way and miles above it from idle. As well as being super smooth as only an I6 can be.
 
Uncle Douglas

Uncle Douglas

Well-known member
Callsign: delete
RDavisinVA said:
Tried to take one this morning, but the sunlight was glaring out the view.
Will get someone to help so I can shift while they take footage.
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I think John meant a video of me flogging the Robert The Davis 292, with you in the passenger seat with the "I told you so's"
 
V

vintagepatina

Well-known member
Robert, at no point did I insult your expertise or engineering. I simply offered a difference of opinion. I place a higher value on authenticity than others perhaps, or perhaps I don't see the appeal of this particular engine.

The piece of information missing is the total cost of the swap for a retail customer. Do you have those figures worked out?

No reason to be sour.
 
RDavisinVA

RDavisinVA

Technical Excellence Contributor
vintagepatina said:
Robert, at no point did I insult your expertise or engineering. I simply offered a difference of opinion. I place a higher value on authenticity than others perhaps, or perhaps I don't see the appeal of this particular engine.

The piece of information missing is the total cost of the swap for a retail customer. Do you have those figures worked out?

No reason to be sour.
Click to expand...

I embrace people with different opinions which you are certaintly entitled too, but yours are without basis and add no value.
 
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GynormousMellon

GynormousMellon

Well-known member
Personally I like options. This is another option and with the price of the motor and lack of having to do major modifications, it gives us another great motor option.

Looking forward to hearing about more testing!

Sent from my Pixel XL using Tapatalk
 
85RED110

85RED110

Well-known member
What was that? About 10 sec? I'm impressed. This is with 3.54 diffs, 1.4 tc, and R380?

Sent from my SM-G930V using Tapatalk
 
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