Turbo question for the 4BD1 experts

Printable View

Show 40 post(s) from this thread on one page

24th April 2008, 04:48 AM
Dougal

Quote:

Originally Posted by def-90

if you want o do it properly get the fuel pump rebuilt to turbo spec!!!

then you know you are getting correct fuelling instead of guessing by manually tuening your fuel screw

The fuel pump itself (bosch/Zexel/Kiki Type A) appears the same on both turbo and non turbo engines. The governor differs in that some turbo ones are fitted with the aneroid (controls smoke off-boost) and they probably have a different torque plate.
The main difference is where the max fuel screw is set, an EGT gauge is a necessary part of any diesel turbo install.

Regarding turbo and manifold choice, it all depends how good you are at fabrication.
If you aren't, then a factory manifold with either a T3 turbo from something like a nissan RB20 or the non-wastegated factory T25 would be the easiest solution.
If you can make your own manifolds then there's no end of options. Do you like low end torque or high end power more?
8th June 2008, 12:42 PM
Larns

Bump.....................

I'm getting a little more interested in how to select a turbo.

What do some of the figures mean? I am looking at matching a turbo to suite my driving style not vicy vurka.

:twobeers:
8th June 2008, 04:23 PM
Dougal

Quote:

Originally Posted by Larns

Bump.....................

I'm getting a little more interested in how to select a turbo.

What do some of the figures mean? I am looking at matching a turbo to suite my driving style not vicy vurka.

:twobeers:

Do you want more low to mid range or more mid to high end?
There are a whole slew of turbos that'll work, it all depends on what you want.
8th June 2008, 06:11 PM
Larns

I really am after something that will start to spool up early and hold good boost (15psi), ie. low end start around the 1000-1200 and be safe up to around the 2800. I rarely ever get it above the 25-2600 mark unless I'm towing a big boat up a large ramp/slope.
I was looking at the T25 like you suggested Doug's but there appear to be so many varients with the inlet and outlet wheel/housing's and blade pitches and such.
If I knew what numbers I was looking for it'd narrow down the chances of buying the wrong unit. Oh I can fabricate pretty much anything in my workshop so making a manifold to fit would not be a problem if there was an ideal turbo but wouldn't fit a standard T3 configuration.

Heres one for you, the new 2.5ltr common rail hiluxes have a variable vain turbo, how would one of those hold up you reckon, maybe off a wreck I could get one for a half decent price.

Cheers
8th June 2008, 06:22 PM
Dougal

Quote:

Originally Posted by Larns

I really am after something that will start to spool up early and hold good boost (15psi), ie. low end start around the 1000-1200 and be safe up to around the 2800. I rarely ever get it above the 25-2600 mark unless I'm towing a big boat up a large ramp/slope.
I was looking at the T25 like you suggested Doug's but there appear to be so many varients with the inlet and outlet wheel/housing's and blade pitches and such.
If I knew what numbers I was looking for it'd narrow down the chances of buying the wrong unit. Oh I can fabricate pretty much anything in my workshop so making a manifold to fit would not be a problem if there was an ideal turbo but wouldn't fit a standard T3 configuration.

Heres one for you, the new 2.5ltr common rail hiluxes have a variable vain turbo, how would one of those hold up you reckon, maybe off a wreck I could get one for a half decent price.

Cheers

The T25 I'm using will fit the bill. Mine is from a nissan bluebird with the CA18DET engine. A/R of 0.49 on the exhaust side is what you're looking for.
If you want to spring for a new garrett, the GT2052 is roughly the new replacement for that.

Regarding variable vane, I'll let you know when I get mine working. I have a turbo from a mercedes 2.7L V6 diesel. Got to get some tricky internal machining done so I can rotate the parts around to the required angle. Controlling some of the new variable vane turbos will require some electrical work, the slightly older ones use a pressure or vacuum air actuator.
12th June 2008, 02:52 PM
Larns

Q for Doug's there is a Garrett advertised with this description "TURBO HAS FRONT COM COVER A/R.60 - M24 AND A/R.49 - M3 INTERNAL WASTGATE TURBINE HOUSING."

E-Bay obviously, is the comp housing too big?

There is another advertised as being an M24 with a A/R of 42? Too small?

:twobeers:
12th June 2008, 03:13 PM
Dougal

Quote:

Originally Posted by Larns

Q for Doug's there is a Garrett advertised with this description "TURBO HAS FRONT COM COVER A/R.60 - M24 AND A/R.49 - M3 INTERNAL WASTGATE TURBINE HOUSING."

E-Bay obviously, is the comp housing too big?

There is another advertised as being an M24 with a A/R of 42? Too small?

:twobeers:

Got a link to the ad?
12th June 2008, 04:21 PM
isuzurover

This one? Nissan garrett turbo from R32 GTR T28 CA18det - eBay Turbos, Superchargers, Performance Parts, Car Parts, Accessories, Cars, Bikes, Boats. (end time 12-Jun-08 20:04:20 AEST)

M24 doesn't mean much...
http://cgi.ebay.com.au/Nissan-garret...QQcmdZViewItem

Another
http://cgi.ebay.com.au/GARRETT-TURBO...QQcmdZViewItem

This looks like a good buy:
http://cgi.ebay.com.au/Garrett-T25-T...QQcmdZViewItem

And this one?
http://cgi.ebay.com.au/GENUINE-GARRE...QQcmdZViewItem
12th June 2008, 05:42 PM
Dougal

Quote:

Originally Posted by isuzurover

This one? Nissan garrett turbo from R32 GTR T28 CA18det - eBay Turbos, Superchargers, Performance Parts, Car Parts, Accessories, Cars, Bikes, Boats. (end time 12-Jun-08 20:04:20 AEST)

I have one of those, it's the intended "large" turbo in my compound setup. It's a T28 with a 0.64 A/R turbine side. Still usable but it's going to give more top and and not much down low.
2mm of shaft play sounds poked.

The next two below are the same thing.

Quote:

Originally Posted by isuzurover

M24 doesn't mean much...
Nissan garrett turbo from R32 GTR T28 CA18det - eBay Turbos, Superchargers, Performance Parts, Car Parts, Accessories, Cars, Bikes, Boats. (end time 12-Jun-08 20:04:20 AEST)

Another
GARRETT TURBO T25 - NISSAN SKYLINE R32,180SX,CA18DET - eBay Turbos, Superchargers, Performance Parts, Car Parts, Accessories, Cars, Bikes, Boats. (end time 22-Jun-08 11:32:40 AEST)

This one is exactly the T25 that I have. I had to modify the wastegate bracket and I also modified the arm to let me adjust the boost.
The "high flowed" comment makes me nervous though, they could have done any number of things to it, several of which aren't good for diesels.

Quote:

Originally Posted by isuzurover

This looks like a good buy:
Garrett T25 Turbo - Fully reconditioned - eBay Turbos, Superchargers, Performance Parts, Car Parts, Accessories, Cars, Bikes, Boats. (end time 15-Jun-08 17:00:58 AEST)

This last one is a hybrid, T28 compressor with a small T25 turbine housing. It could work very well or it could be a dog. Who wants to buy it and find out?

Quote:

Originally Posted by isuzurover

And this one?
GENUINE GARRETT T25/T28 - eBay Turbo Parts, Performance Parts, Car Parts, Accessories, Cars, Bikes, Boats. (end time 19-Jun-08 17:40:00 AEST)
12th June 2008, 09:35 PM
Larns

Quote:

Originally Posted by Dougal

This last one is a hybrid, T28 compressor with a small T25 turbine housing. It could work very well or it could be a dog. Who wants to buy it and find out?

I will if I can get it for a hundred bucks! Otherwise I'll keep hunting for a normal T25.

Cheers

Show 40 post(s) from this thread on one page