Red top 3B Fueling and EGT

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KIWIALEX

KIWIALEX

Joined
Mar 31, 2023
Threads
24
Messages
81
Location
New zealand
Iv recently gotten my 3B started for the first time since it got a full rebuild. Being that it was basically brand new I thought to install a digital gauge set that pretty well does everything and some.

I noticed that my EGTs felt pretty high. I was hardly able to accelerate (At full throttle) past 70km/h without the egts reaching well over 600 even into 700 degrees Celsius and that was on flat ground. And my 3B is in the Landrover series 3 which as far as I’m aware is pretty light compared to the 40 and 60 series etc.

It does reach and cruise at around 90km/h gradually without setting the gauge alarm off and I’m aware it’s not a race car but the egt just seems a little to high to soon. I’m thinking the fuel screw may need to be turned down as it may be over fueling as it does puff out a little black smoke when reved

Just wondering if anyone else had any insight to this?

Note: the EGT sensor is right on the manifold

IMG_4736.webp
 
I've always considered EGTs irrelevant in an old school NA diesel.

Your lack of power may need investigation. Could you provide more insight into the engine, its history, work done, etc. Of particular note is timing given the pump has been off. Both spill timing, and confirmation the pump was reinstalled correctly. Are you also able to note if you drove this vehicle/engine combination before the rebuild and indicate if its dramatically different from that experience?

I wrote this small guide on maximising performance of a 2H engine, all of it is entirely relevant to your 3B (assuming it has the inline pump, I am not sure what a "redtop" 3B is though).


Link to guide: 2H - Maximising Power - https://docs.google.com/document/d/1Exax-naX3REHEsphvBW_uUcA14Zf8WolfSzqpenQ7co/pub
 
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duncanrm said:
I've always considered EGTs irrelevant in an old school NA diesel.

Your lack of power may need investigation. Could you provide more insight into the engine, its history, work done, etc. Of particular note is timing given the pump has been off. Both spill timing, and confirmation the pump was reinstalled correctly. Are you also able to note if you drove this vehicle/engine combination before the rebuild and indicate if its dramatically different from that experience?

I wrote this small guide on maximising performance of a 2H engine, all of it is entirely relevant to your 3B (assuming it has the inline pump, I am not sure what a "redtop" 3B is though).


Link to guide: 2H - Maximising Power - https://docs.google.com/document/d/1Exax-naX3REHEsphvBW_uUcA14Zf8WolfSzqpenQ7co/pub
Click to expand...
Engine was professionally rebuilt from the ground up, pump and the injectors are the same. Red top like the red 3b sticker as apposed to the later 3B 2 with the different rocker cover etc.

I’ll look into your guide cheers. It does drive incredibly compared to the other 3Bs iv had that were in an “original” condition. Engine was toast before the recon. I installed the pump but followed the 3b workshop manual etc and it starts first tick and runs/idles perfectly
 
FJBen said:
What’s your transmission?

Is this running 4.7 gears in the diffs?
What size tires?
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standard Landrover front diff and Salisbury Rear diff. Then with the 3b the 4 speed gearbox and transfer case. The h41 gearbox I believe
 
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FJBen said:
What’s your transmission?

Is this running 4.7 gears in the diffs?
What size tires?
Click to expand...
Tyre size is 285/75/r16 so just under 33”

The old 3b that was in it before I put in my reconditioned one never had an issues with the tyre size speed/acceleration wise. Granted I also never had an EGT gauge
 
duncanrm said:
I've always considered EGTs irrelevant in an old school NA diesel.

Your lack of power may need investigation. Could you provide more insight into the engine, its history, work done, etc. Of particular note is timing given the pump has been off. Both spill timing, and confirmation the pump was reinstalled correctly. Are you also able to note if you drove this vehicle/engine combination before the rebuild and indicate if its dramatically different from that experience?

I wrote this small guide on maximising performance of a 2H engine, all of it is entirely relevant to your 3B (assuming it has the inline pump, I am not sure what a "redtop" 3B is though).


Link to guide: 2H - Maximising Power - https://docs.google.com/document/d/1Exax-naX3REHEsphvBW_uUcA14Zf8WolfSzqpenQ7co/pub
Click to expand...
IMG_4723.webp


Just had a brief look at your guide. As far as exhaust goes it’s pretty free flowing. It ends past the driver door and before the rear wheel, and has straight through hotdog muffler.

The intake isn’t complete yet as I still plan on making a snorkel with either a ram air intake or a mushroom top like on the 70 series but airbox has a high flow pod filter and as it sits takes air from the guard at a temp of around 20-30 degrees (had the gauge so might as well use it also)

Weight of wise I don’t think I have to much of an issue. It is a long wheel base series 3 but having an aluminium body as opposed to the steel body of a Land Cruiser should help… I think

I didn’t note it before while cruising at 90km/h the steel egt is around the 400-500 mark which from what I was able to read up on is pretty bang on the money
 
KIWIALEX said:
Tyre size is 285/75/r16 so just under 33”

The old 3b that was in it before I put in my reconditioned one never had an issues with the tyre size speed/acceleration wise. Granted I also never had an EGT gauge
Click to expand...

I didn’t think that was an issue.

Have you checked the timing? If timing is retarded too far, you get higher egt, lack of power/accel.
 
KIWIALEX said:
It does drive incredibly compared to the other 3Bs iv had that were in an “original” condition.
Click to expand...

Sounds good.. so no real lack of power? And aside from concerns over the EGTs its running well?

That little 3B looks so sweet in a Landrover!
 
duncanrm said:
Sounds good.. so no real lack of power? And aside from concerns over the EGTs its running well?

That little 3B looks so sweet in a Landrover!
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Haha I appreciate that. Definitely a major upgrade from the factory 2.25 diesel that was in it

Yeah I wouldn’t say there’s any lack of power. It’s just me being more mindful of my EGTs now that I have a gauge for it and the motor only has about 150km on it since the rebuild I might try tweak the fuel screw just to see if that helps.

IMG_4603.webp
 
With no turbo the big question is smoke. If it smokes black then it's either overfuelled or your rings still need to seat.

I put an EGT on my old non turbo work car and couldn't get it to read past about 550C. When I added a turbo it could bury the needle.
 
Dougal said:
With no turbo the big question is smoke. If it smokes black then it's either overfuelled or your rings still need to seat.

I put an EGT on my old non turbo work car and couldn't get it to read past about 550C. When I added a turbo it could bury the needle.
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That’s probably part of it. It is only about 150km into its 600km run in stage.

The issue is I could plant my foot and would get upto and past 700 degrees and I’d only be at 70km/h
 
FJBen said:
Fuel timing. I can’t imagine it runs right if you have to floor it all out just to get to 70kmh and high egt. I’d spill time again.
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Nah I’m not saying I have to floor it to get to 70. I’m just saying if I give it full jandal at 50km/h by the time I’m at 70 my EGTs are at 600 and climbing. So I choose to let off the throttle.

There’s definitely a bit of me wanting to baby the engine while it’s still been run in, cause I could definitely keep my foot planted until I’m at say 90km/h and the engine could probably care less I’m just choosing not to. I’m just wondering if there’s a way to get them down from where it’s at as they seem a little high. The fuel pump reconditioned, is timed and has been bench tested etc which is why I’m wondering if there’s a case of over fuelling and maybe I need to fiddle with the fuel screw
 
KIWIALEX said:
I’m wondering if there’s a case of over fuelling and maybe I need to fiddle with the fuel screw
Click to expand...

There is no downside with winding the fuel screw in a bit.. keep on screwing it in until it starts to impact power on a hill climb. Try and keep note of where it is and how many turns you make so you can return it to the current setting if you want.
 
duncanrm said:
...That little 3B looks so sweet in a Landrover!
Click to expand...

At last, a decent diesel for the Series Land Rover (and period correct, Lol)!...

PS. Ex-LR Defender (1988) owner here...
 
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