Thread: Turbo choice

Originally Posted by simmo

If i was getting a turbo now, i'd want a VNT, its worth the trouble to get one set up. No single turbo will be able to operate across as wide a range as a VNT can do. My 2256 VNT Garret is set to 1.5 bar max boost, though I don't go there often, 15 psi is fine for 95 % of the time. It's so versatile, and always seems to have boost. the Isuzu is a bigger engine, but the 2256 has been used in more powerful engines, up to 185 hp. ( i'd be happy with that ) Mine uses a mechanical diaphragm to change the nozzles. , After some progressive increases to the fueling settings, the VNT transformed the standard 300 tdi, which I thought was gutless, and hard to drive, there's more power and torques across the whole rev range, and driving the car is much more relaxed, I think I probably do 30-40% less gear changes that I used to, even though I have since fitted a disco -2 transfer case to make use of the extra torque. Picture attached, the kit was from Madman in South Africa.
Catalog of car models and turbos fitted attached. good luck

cheers simmo

So nows its almost got the same power as an NA 4bd1?

,

Its hard to get consistent figures, so i appreciate any corrections ;

a 3.9 liter 4bd-1 is 83 hp @3200 rpm, ( 245 n/m), (21.3 hp/liter)

a 4BD1-T is 121 hp, @3000 rpm, (314 N/m), though some sources quote the 4BD1-T as high as 100 kw or 134 hp. (31- 34 hp/liter). it looks like a 2256 VNT would be a good match for a 4BD.

A standard 2.5 liter 300 Tdi is about 110 hp @ 4000 rpm (265 n-m), (44hp /liter.)

So on the surface a standard 300 Tdi is more powerful than an NA Isuzu by a fair margin, and almost as powerful as a 4BD1-T, but I can't say i ever went to 4000 rpm in my tdi to find all those horses.

I'm more interested in the usable power up to about 3600.

I'm a bit financially challenged to do a dyno run, but IMV my car, (VNT, APT intercooler & tweaked fuel pump) now is at least 10% more powerfull and more torque than standard, so I'm claiming about 125 hp, and 290 m/m, ( though I think is better than that). But its lot more "drivable", and close in power to a 3.9 liter Isuzu T.

cheers
simmo

Now I get why the transition from turbo Perentie to RRV 3.6 was so stark, 268hp @4000 rpm and 640nm @ 2000rpm.

I still like the Perentie.

Originally Posted by discoRRc

So nows its almost got the same power as an NA 4bd1?

Sometimes I think if my 300tdi ever wears out I might put a Isuzu in the 130 but then I think no I like a real Land Rover and also I probably I wouldn’t be able to **** that far

I have the td04-19t.
All up it was around $2000, that including a new 3" exhaust, new air filter housing, new manifold, 2nd hand truck sump and oil filter housing with Nugget adapter.
While i had the motor out I also insulated the firewall and put a new clutch in.
I am more than happy with it, even though I only run 12psi and 600deg. 1981 model motor so I dont want to push it to hard.

Originally Posted by Albert

I have the td04-19t.
All up it was around $2000, that including a new 3" exhaust, new air filter housing, new manifold, 2nd hand truck sump and oil filter housing with Nugget adapter.
While i had the motor out I also insulated the firewall and put a new clutch in.
I am more than happy with it, even though I only run 12psi and 600deg. 1981 model motor so I dont want to push it to hard.

Lets me know if you want to get more out of it Alfred. Have the same turbo, i also ran it on a stage1 motor for a while, 30psi and 720egts. Sounds like you could go for a few more psi. 15-19 is nice.

Wow. I could smell mine cooking at about 600 degrees, post turbo.

I assume Vern’s is 720deg pre turbo?