4BD1T, Maximum performance

[paulthepilot_5]

Hey guys.

What sort of maximum power/ torque figures have people achieved out of the 4BD1T? I’m not talking safe tune, zero smoke sort of thing here.
Looking at starting a diesel drag landy project, for a bit of fun. I am tossing up between using a 4JB1T and a 4BD1T. Have done a fair bit of work on 2.8L 4jb1’s getting good output 200hp 600+nm. I see the 4Bd1 as a good candidate despite the extra weight.

Any examples dyno sheets would be great

Cheers

[Vern]

There's one Ausrover did for a customer, 174kw at the wheels and I think over 700nm, clutch was slipping pretty bad though.

[cripesamighty]

Contact Blknight.aus on here. He can help you with extracting power out of these engines. From memory, the current record is over 100PSI of boost using multiple fuel pumps on a highly modified 4BD1T in the USA a few years ago for a drag racing truck. A divorce got in the way and the engine and truck was parted out. The details are on the forum somewhere. I'm sure someone will help in with a link or two.

[paulthepilot_5]

Contact Blknight.aus on here. He can help you with extracting power out of these engines. From memory, the current record is over 100PSI of boost using multiple fuel pumps on a highly modified 4BD1T in the USA a few years ago for a drag racing truck. A divorce got in the way and the engine and truck was parted out. The details are on the forum somewhere. I'm sure someone will help in with a link or two.

Ah yes, forgot about Blkight.aus and his wealth of knowledge on Isuzu’s. Have not been too active on the forum the last few years.

Would be good to get some info on the US based truck. A decent single pump compound setup is where I plan to head, just a upscaled version of what I have done on my Rodeo.
I know the 4Bd1 is much more solid engine than the 4jb1t. Hoping to get an idea on what is likely the weakest link

Cheers Paul

[cripesamighty]

From memory, the American guy with the massively tweaked 4BD1T was Randy (Carcrafter). Use both the search button at the bottom of the page (AULRO only) and google to find some of his stuff. Lots to get you started!

[Homestar]

Pity Dougal doesn’t get on here any more - he was a wealth of knowledge too - think he hangs out on Pirate 4x4 now.

Here’s a thread with some info and a few off topic excursions to left field - 4BD1T Turbo Sizing and Performance Prediction. (https://www.aulro.com/afvb/the-isuzu-landy-enthusiasts-section/169564-4bd1t-turbo-sizing-performance-prediction-27.html)

[workingonit]

Hey guys.

... starting a diesel drag landy project, for a bit of fun...

Cheers

Seen this - land rover 110 county diesel quarter mile drag...4bd1t?

YouTube (https://www.youtube.com/watch?v=kbGM4elFDa4)

[Vern]

Pity Dougal doesn’t get on here any more - he was a wealth of knowledge too - think he hangs out on Pirate 4x4 now.

Here’s a thread with some info and a few off topic excursions to left field - 4BD1T Turbo Sizing and Performance Prediction. (https://www.aulro.com/afvb/the-isuzu-landy-enthusiasts-section/169564-4bd1t-turbo-sizing-performance-prediction-27.html)He is on 4btswaps daily though.

[paulthepilot_5]

Seen this - land rover 110 county diesel quarter mile drag...4bd1t?

YouTube (https://www.youtube.com/watch?v=kbGM4elFDa4)

Yeah seen that one, I want to be going a lot quicker than that Im going from a 14sec TF Rodeo [bigsmile]

[Blknight.aus]

Ah yes, forgot about Blkight.aus and his wealth of knowledge on Isuzu’s. Have not been too active on the forum the last few years.

Would be good to get some info on the US based truck. A decent single pump compound setup is where I plan to head, just a upscaled version of what I have done on my Rodeo.
I know the 4Bd1 is much more solid engine than the 4jb1t. Hoping to get an idea on what is likely the weakest link

Cheers Paul

4bd1t's are the go.

the back of the napkin suggests that you can haul over 1000nm a the flywheel and something in the order of 700hp from the engine... but thats a lot of money for not a lot of life.

the stock gear is good into the 200hp range and about 450-500nm but you need at least the 3 inch exhaust

For comfortable longevity I wouldn't recommend pushing it too much more than about 160 hp and 450nm.

[paulthepilot_5]

4bd1t's are the go.

the back of the napkin suggests that you can haul over 1000nm a the flywheel and something in the order of 700hp from the engine... but thats a lot of money for not a lot of life.

the stock gear is good into the 200hp range and about 450-500nm but you need at least the 3 inch exhaust

For comfortable longevity I wouldn't recommend pushing it too much more than about 160 hp and 450nm.

Not going to be a daily driver this one, so longevity is not an issue. My Rodeo is a daily so don’t want to push it much more by continuing to drag it. So the Landy is going to be the 1/4mile garden shed. Really looking at going into the upper end of performance out of it. From experience with the smaller 2.8, getting 1000nm 300+hp out of the 3.9 seems quite achievable with enough fueling (sort of what I need to achieve to make it worthwhile going to the 4bd1 over the 2.8 4jb1). From what I gather from some of the 4bTswaps forums a lot of the higher end setups have stock internal engines. What do you see as weak link, rods or crank? . The crank in the 4jb1 was always a weak link, significantly smaller than what the 4bd1 runs.
Cheers Paul

[Blknight.aus]

Not going to be a daily driver this one, so longevity is not an issue. My Rodeo is a daily so don’t want to push it much more by continuing to drag it. So the Landy is going to be the 1/4mile garden shed. Really looking at going into the upper end of performance out of it. From experience with the smaller 2.8, getting 1000nm 300+hp out of the 3.9 seems quite achievable with enough fueling (sort of what I need to achieve to make it worthwhile going to the 4bd1 over the 2.8 4jb1). From what I gather from some of the 4bTswaps forums a lot of the higher end setups have stock internal engines. What do you see as weak link, rods or crank? . The crank in the 4jb1 was always a weak link, significantly smaller than what the 4bd1 runs.
Cheers Paul

the real killer is going to be heat much over the 600nm and 200HP mark and you'll have trouble keeping it cool, it will then lunch the head gasket and pistons not sure what order it would happen in. assuming you only want short shots of full noise, legs and pins, then pistons and bearings.

the block may as well have been hewn from granite the heads gabbro, the biggest issues the guys who push them past 60PSi have is keeping the head bolted down due to head bolt stretch and failure.