Project Snowy met n turbo

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Tinus lotz
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Re: Project Snowy met n turbo

Post by Tinus lotz » 19 Feb 2018 15:39

Looks a lot like the ones in my bakkie ...mabe look at whar they have for the ud40 ? Just to compare?

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Re: Project Snowy met n turbo

Post by Tinus lotz » 19 Feb 2018 16:27

ricster wrote:
19 Feb 2018 15:16
They better bloody work... I'm not opening my motor in a hurry..... :lol:

Who knows which vehicles came out with a N/A TD27?
Hardbody 2.7 n a pick up many moons ago

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Re: Project Snowy met n turbo

Post by David M » 19 Feb 2018 16:33

Tinus lotz wrote:
19 Feb 2018 16:27
ricster wrote:
19 Feb 2018 15:16
They better bloody work... I'm not opening my motor in a hurry..... :lol:

Who knows which vehicles came out with a N/A TD27?
Hardbody 2.7 n a pick up many moons ago
Yep.... Was actually pre Hardbody and was called 1 Tonner. Had one as a company vehicle for a while but the only way you could get 120 km/h was by throwing it out an aeroplane :rolling:
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Re: Project Snowy met n turbo

Post by Peter Connan » 19 Feb 2018 18:20

Not an expert on Diesels, but:
Piston weight and RPM combined is the biggest contributor to engine wear once the engine is up to working temperature. As far as I am concerned, lighter must be better.
But, the above only counts if the crown height is the same, because if not the compression ratio will be reduced.

Now on to balancing and blueprinting:
1) Manufacturers do balance their engines. But on slower-revving engines and "working" engines, they tend to do only balance statically, which is proven to be a fairly inaccurate process. Also, I suspect their tolerances in this regard are far wider than those of specialist balancers, or when they are building high-revving sportscar engines.
2) As aluded above, dynamic balancing is a far more accurate process.
3) Blueprinting is a process where the dimensions of an engine's components are "normalised". They can be normalised with respect to the original manufacturing drawings, or just with respect to each other. For example the conrod's centre distances may be measured, and re-machined such that they are all the same, or they can all be made to be the exact "factory" length. Typically, the parts in question would be the crankshaft, conrods, pistons (crown height), combustion chambers, pushrods, rockers, valves and so forth.
4) Blueprinting may or may not include dynamic balancing. It must include static balancing as a minimum.
5) Both these processes will improve smoothness, rev-ability and lifespan of an engine.

Dynamic balancing is a fairly quick process, thus inexpensive, whereas proper blueprinting is very labour-intensive, thus quite expensive.
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Re: Project Snowy met n turbo

Post by Michael » 19 Feb 2018 18:54

Andre, those are quite good looking pistons. Would love to have a look at them to see what quality they are.
I prefer to use Nural (previously known as AE) pistons, but they are quite pricey, but also use the Autopower ones with great success. The Nural's are an exact duplicate of the UD40 pistons and they have the 4mm oil ring where the TD42T bakkies have the 3mm oil ring.
The Autopower ones do not have the oil journals in the piston head, but does have the alfin insert and seem to take the beating.

Cedric, do you perhaps know which brand pistons you put in your engine?
There are plenty of TD27 NA engines going around, but I cannot say in which vehicles they were used. I do know of heaps that were used in generators and have been looking at loads of secondhand ones as I was looking to find more top covers on the diesel pumps for the boost compensators......
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Re: Project Snowy met n turbo

Post by mvcoller » 19 Feb 2018 19:55

The Nissan 1 Tonner bakkie used the 2.7 NA engine, I would imagine it was actually designated a D27 not TD27. Later a local mod at the Nissan factory in Rosslyn, saw turbos fitted to the normal D27 engines with huge overheating problems built in. As far as I am aware, no locally produced 2.7 Nissans, be it 1 Tonners or Sanis came with a "genuine" TD27 engine.

The only "REAL TD27 or TD27i " (the i indicating "intercooled") engine came in the Spanish built Nissan Terrano 2.7TDi, available locally from about 1998 to 2001. Jap Imports bring in identical engines to the Terrano's TD27 engines from Japan.

I would imagine the best 2.7 pistons would therefore be imported TD27 pistons.

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Re: Project Snowy met n turbo

Post by hugejp » 20 Feb 2018 09:11

Tinus lotz wrote:
19 Feb 2018 15:03
20180219_142210.jpg20180219_142210.jpg
Daai lyk soos die pistons op Michael se rak???
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Re: Project Snowy met n turbo

Post by ricster » 20 Feb 2018 12:09

Michael wrote:
19 Feb 2018 18:54
Cedric, do you perhaps know which brand pistons you put in your engine?
Off hand, no clue what brand. All I do know is that Frans sourced them from Masterparts in Cape Town for me. They were put into a box and shipped up to Jhb for me. I don't even think I have the box they came in.... bearing in mind the engine overhaul was done just over 7 years ago. I do know it has the oil channels for the squirters to blast oil into them.
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Re: Project Snowy met n turbo

Post by hugejp » 20 Feb 2018 16:47

Andre_gtr wrote:
19 Feb 2018 15:25
I found a set of pistons that have caught my interest for a td27t, they are shorter than the normal td27 and td42

better lighter or not, at least they both have the cooling gallery?

td27-t-ii.PNG

TD27t not sure about the shorter skirt and pattern on the top, but they are anodized on top

2.PNG

td42 the skirts are considerably longer and the design on top is different

td42t.PNG

any comments from the experts??

Wat vra hulle vir die kit??

Shipping??
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Re: Project Snowy met n turbo

Post by Andre_gtr » 20 Feb 2018 19:41

hugejp wrote:
20 Feb 2018 16:47
Andre_gtr wrote:
19 Feb 2018 15:25
I found a set of pistons that have caught my interest for a td27t, they are shorter than the normal td27 and td42

better lighter or not, at least they both have the cooling gallery?

td27-t-ii.PNG

TD27t not sure about the shorter skirt and pattern on the top, but they are anodized on top

2.PNG

td42 the skirts are considerably longer and the design on top is different

td42t.PNG

any comments from the experts??

Wat vra hulle vir die kit??

Shipping??
Nie seker nie ek het n vriend oorsee wat vir my n prys gaan kry

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