isuzu 4BD1T swap?!

[dieselcruiserhead]

good stuff here guys as always
Excited for that turbo to show up Bill!

[gifu]

Dougal... can you remind me what Turbo you are running? And how much did you turn up the fuel? Did you advance the pump timing? I remember you saying something about 1500F EGT before turbo (maybe you posted in C, can't remember).

[Dougal]

Originally Posted by gifu

Dougal... can you remind me what Turbo you are running? And how much did you turn up the fuel? Did you advance the pump timing? I remember you saying something about 1500F EGT before turbo (maybe you posted in C, can't remember).

I'm running a garrett T25 with a 0.49 A/R turbine housing. I run EGT's up to 750C pre turbo.

I'm afraid I've lost all reference to what the fuel pump should have been set at. My fuel pump has the boost device (aneroid) on the back which was leaking for a long time. At the last shop rebuild (pushing 10 years ago now) they adjusted the fuel up to deliver the required amount when the aneroid was leaking.
So when I fixed the aneroid leak I got massive amounts of fuel. I've since turned the fuel screw down by around 2 turns and still back off the pedal to keep the EGT's under that 750C limit at altitude and on sustained hills.

I have my aneroid adjusted so there's no black smoke visible when driving it. This does put a damper on the low end response a little, but preventing pollution is worth it IMO.

[gifu]

ah... 750C is... 1350F. From what I understand, that's pretty darn hot. Not quite enough to do damage, unless it stays at that level for a long time.

and is that in a Rover? What transmission is behind it? Auto or stick?

I'm really interested to see/feel/drive the difference between a pumped up 4BD1T and a 1HDT or 1HZ(t). Too bad neither really exist around here.

[Dougal]

Originally Posted by gifu

ah... 750C is... 1350F. From what I understand, that's pretty darn hot. Not quite enough to do damage, unless it stays at that level for a long time.

and is that in a Rover? What transmission is behind it? Auto or stick?

I'm really interested to see/feel/drive the difference between a pumped up 4BD1T and a 1HDT or 1HZ(t). Too bad neither really exist around here.

Yes it's in a rangerover with the Isuzu truck gearbox behind it (5 speed). Slow shifting box but bullet proof.

There's a big difference in feel between these engines and the toyota 6's. These are thumpers, massive low end which tapers off to not much high end.
The toyotas are mostly the opposite, they'll happily spin up way past the Isuzu's rev limit but don't have the low rpm punch.

Yes 750 is as hot as you ever want to go, but I find that with that much power you don't end up using all of it for very long. The average hill is dispatched in under a couple of minutes. You'd need to be towing or living in the alps to need more in which case 600 or so is a sensible sustained load.

[gifu]

88_TLC... any update? Did you get that upgraded Turbo? Success? Or still powerless?

[SUZU60]

Sorry it took me so long guys I was formerly AJ60 but couldnt remeber my password and forgot my pasword to my old e-mail address(major brain fart). On top of that I have been knee deep in my conversion and just finished last week. I have a BeCool radiator with a SPAL 14" fan, 86' 4BD1T with 42K orig miles to a (I know you guys are going to hate this but I love it) TH400. It just wants to pull. I love this thing its a monster even dispite the lack of a OD which I have a plan for later on. If you guys are interested in some pics let me know. By the way the engine is sitting on a FJ60 with a 6" suspension lift 33" BFGs, and FOX Shocks all the way around, shackle reversel. I tried to hit the oil pan with the front pumpkin yesterday and couldnt its awesome.
What can I say 'I LOVE THIS THING'.

[Dougal]

Originally Posted by SUZU60

If you guys are interested in some pics let me know.

You're making us ask?

Hurry up with the pics.

[88tlc]

the turbo upgrade on the 4bd1t is finished and took it up the 'tester hill' . it has much more power, more boost, and runs cooler because of getting more air.

the turbo I used was a T3 built by blaastperformance.com.

t3 t50 turbo
turbine .48a/r, 68 trim.
compressor .42 a/r, 42.5/60.1 50 trim

I had to replumb everything. new hoses and fittings for the coolant, new stainless line for the oil feed, and reused the metal hardline with a new fitting for the oil out, and welded in a new fitment. also had to reweld the cast exhaust-out onto the wastegate flange of the turbo. so all this took a fair bit of headscratching, and build.

And while I had the landcruiser offline, I decided to do a bunch of other needed work
birfield rebuild, new bearings, new calipers.
new brakelines
added a dieseltherm unit into the diesel inlet on the filter, sweet for antigelling and cold weather and helps be able to use biodiesel blends.
added a new fuse box for all power, removing a bunch of leads going straight to the battery.

but the turbo does great. I can hear it whining at idle, i can get 5-8 pounds of boost almost immediately, and wind it out, I get 15-18psi. egts now max out at about 1100, and this is now preturbo!

some images of the mod.

[Dougal]

Excellent news.

So just to get a benchmark for this turbo, how many rpm until it deliveres say 10psi boost and how much earlier is this than the original?

Do you know your boost and EGT figures at a 100km/h flat road cruise?

[SUZU60]

Originally Posted by Dougal

You're making us ask?

Hurry up with the pics.

I ll post them on sunday, ill be off island until then.

[88tlc]

Originally Posted by Dougal

Excellent news.

So just to get a benchmark for this turbo, how many rpm until it deliveres say 10psi boost and how much earlier is this than the original?

Do you know your boost and EGT figures at a 100km/h flat road cruise?

i have not taken it yet on a road trip. need to get the exhaust pipe put back together, right now it is cut just infront of the muffler. Good metrics to define, i will comment back when I return to the shop, but that will be late OCT. Traveling in asia at the moment.

[SUZU60]

Here are some pics of my latest conversion. 4BD1-T into a 85' FJ60.

[Dougal]

Originally Posted by SUZU60

Here are some pics of my latest conversion. 4BD1-T into a 85' FJ60.

Cool, so that's the mid 80's version with the IHI turbo? What are the other details.