3B compound turbo, 25psi boost!?!

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

When yours gets together and the boost is turned up, take me for a ride and we will talk. I looked into getting the 1hdt two stage injectors rebuilt and that was sort of a turn off for that motor right there. 300$ each from NW. Not like id let them do it anyhow, but serously? I like the 1hdt but it comes with a few not so insignificant draw backs.
 
gerg said:
When yours gets together and the boost is turned up, take me for a ride and we will talk. I looked into getting the 1hdt two stage injectors rebuilt and that was sort of a turn off for that motor right there. 300$ each from NW. Not like id let them do it anyhow, but serously? I like the 1hdt but it comes with a few not so insignificant draw backs.
Click to expand...

Ill let you know for sure, Im sure we will have a few nights between then and now pondering things over my engine bay...

I did all the same checks you are on the 1HD and although a great engine there was a few glaring issues in my mind that turned me almost completely off it. Injectors being one part, pump and 100k kms BEB being others.
 
Wheelingnoob said:
Ill let you know for sure, Im sure we will have a few nights between then and now pondering things over my engine bay...

I did all the same checks you are on the 1HD and although a great engine there was a few glaring issues in my mind that turned me almost completely off it. Injectors being one part, pump and 100k kms BEB being others.
Click to expand...

250 g/kwh being the last. But I'm wondering if with a better turbo and more advanced timing that could be improved upon?
 
Wheelingnoob said:
Ill let you know for sure, Im sure we will have a few nights between then and now pondering things over my engine bay...

I did all the same checks you are on the 1HD and although a great engine there was a few glaring issues in my mind that turned me almost completely off it. Injectors being one part, pump and 100k kms BEB being others.
Click to expand...

Jer or Dougal, what is a realistic high power level at the wheels expected from your izuzu diesel.

I 100% agree there are better diesel options out there. The more I learn about the isuzu engines just as an example there are superior engines than the 1hd-t.
But like anything, what are your goals, wants and needs.
If I was going to do a full out diesel swap I would look into another option other than the 1hd-t.
 
ForealBoreal said:
Jer or Dougal, what is a realistic high power level at the wheels expected from your izuzu diesel.
Click to expand...

That all depends where you want to stop. We don't have a decent collection of dyno results for these engines either.

At the flywheel 180kw should be acheivable without internal pump mods.
With mods to the rack only over 200kw should be fine.
With new pump elements it all depends where you want to stop. Randy's Isuzu was about 350hp with a single turbo (dyno'd) and estimated over 500hp with compounds but never dyno'd.
 
ForealBoreal said:
Jer or Dougal, what is a realistic high power level at the wheels expected from your izuzu diesel.

I 100% agree there are better diesel options out there. The more I learn about the isuzu engines just as an example there are superior engines than the 1hd-t.
But like anything, what are your goals, wants and needs.
If I was going to do a full out diesel swap I would look into another option other than the 1hd-t.
Click to expand...

I'm not planing or trying to find that point. I simply want enough power so I do not feel that I have lost any performance over the engine I have now while still increasing my economy and thus lowering my cost per KM.

I'm sure with a hot pump and turbo this engine would produce some serious power.
 
Thought I'd post up a sort of crappy video of the recent changes I've done with the set up. Changed the small turbos compressor from the 13c it had to an extended tip 13t and swapped out the large turbos compressor from a 50 trim to a 60 trim. Egts are down and boost is up. Builds a bit slower in the lower rpms, but pulls much better above 1800rpm. Redid the exhaust so bends are smooth and removed the glass pack as it's quite quiet anyway with just straight pipe. Added a snorkel. With max fuel it burns clean with 10lbs boost at 1500rpm and 30lbs at 2800rpm, egts have gotten up to 1150f on long hills after 15min of WOT.

trim 9FA9BF4B B98D 4249 BDD9 2862F472D7B0
Hard to see in the video, but the gauges on the left part of the dash are egt (left), large turbo 20lb gauge (middle) and total boost 35lb gauge (right). Egts max at 1050f during the drive, large turbo max boost 15lbs and small bumps it up to 30lbs total.
g
image.webp
 
Last edited:
Yeah my buddy here is from Sidney and he's always reminding me of that, so I just remind him he drives a Dodge! He does have a urinal in his garage which is pretty cool though. I'm a little jealous actually. Of the urinal that is.
 
lol
Im confusled!

I'm not sure whether to pity you your miserable life that makes you jealous of your buddy for having somewhere to piss, or be jealous of your awesome life where the only thing you lust for is a urinal in the garage!!

I'll just settle for being jealous of your awesome compounds! ;)
 
So we all want stuff, but a urinal falls more into the "need" catgory. Its how I justify it when my wife and I talk about it. The compounds work well for a 3B. It just doesnt have more fuel which would be nice. Im actually putting them up for sale and will be replacing it with a single average turbo on as im selling the truck in the spring.
 
So it's something you need to map long before you start welding and have a target power goral in mind. Understanding how to properly map it is a whole other deal. When I put a 4bd1t into my 80 series I will put a single on it at first, but eventually will do a compound as it would take a very sofisticated turbo to get close to 30 psi reliably, and I'd like to get into the mid 30s intercooled with a done up pump. Can only do that with my level of tech through compounds. I'm looking to pull a 5k trailer throught the mountains for a couple of weeks in the summer at speeds my wife wount complain at. Not a modest goal I'm thinking.

The cool thing with this set up is the large turbo is only boosting 15psi while the small is doing only 1.4 PR which is the equivalent thrust stress of about 8 psi. Both turbos are doing very modest amounts of work which would otherwise kill an average turbo in a relatively short period of time. Both are easy to rebuild with common parts. No BB here. So it's more thean double the work to build it, even if you have lots of room. When room becomes an issue, trial and error fitment can zap your joy pretty quick. Im fortunate enough to have a spare engine to build on and took lots of measurements of offsets to firewall and PS pump resivoir and fender to get a box so to speak in which to build in. I still have room to spare, but the 60 seris engine bay is really roomy on the right side for left hand drive vehicles. The 80 series with the Isuzu engine will be super tight. I'm honestly not too overjoyed about that. Fortunately others have done it, so I just need to tweak it to my needs.
 
That is a great question. No I never did, but I will before I pull it off. I have just discovered I have a family of rats that just invaded my attic, so no turbo play for a while. And no I actually live in a normal house with flush toilets and stuff. Pretty gross. My wife's so freaked out that instead of going to bed like most guys, I get to climb into my low celing attic and kill stuff.
 
You must log in or register to reply here.

Share this page

Back
Top Bottom