Photo comparison of factory turbo parts vs. NA parts

[cpdenton]

I just tore down and parted out a factory turbo engine and grabbed some side by side picture comparisons of the internals before I shipped the rods to idioit.

First, the e4od flywheel. The turbo engine is on top. You will not on the engine side of the flywheel(second picture) there is a weight welded on and also a few holes drilled near the weight.

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Now, some pictures of the differences in the rods. NA on the left, turbo on the right.

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I have the oil coolers as well. I might tear into them in the morning.

 

[icanfixall]

The wrist pin differences are 28mm for the na and 32mm for the turbo.

 

[riotwarrior]

Is it me or just the second picture of rods n pistons but the turbo rod looks kinda sorta twisty

 

[cpdenton]

Think it's just perspective Al. They are nice and straight, but I agree that picture has some weird something going on!

 

[IDIBRONCO]

Looks like a trick of the light to me.

 

[cpdenton]

Found some interesting stuff when I pulled apart these two oil coolers today.

Both of the coolers, one from a turbo engine and one from an NA engine, are identical. Both have 27 tubes. Not sure if they have ever been changed, but there was no rtv on either of them like you would expect if they had been.

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The cooler on the bottom is from a southern truck and the other is from a truck that lived in the St. Louis area. Lotsa rust on that one!

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Pic of the part number from the one that was on the NA engine. The other one was too rusty to identify.

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[riotwarrior]

Might be hard to see but the differences as I know them are fin count between the two big O rings is a port that passes fluid were you see fins...turbo has more per inch iirc

 

[cpdenton]

That's the difference! Here is the pictures.

Turbo cooler first. 24 fins visible through this hole.

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Now the NA cooler. 19 fins visible.

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[riotwarrior]

Not gonna say "told ya so" but I did...

 

[icanfixall]

Turbo cooler bundles have more fins per inch as already posted. Now can anyone tell me why most cooler bundles have this dent in the fins like seen on the turbo cooler??? Not going to be a test either. I just wanted to know the reason.

 

[riotwarrior]

Dunno ID mark for production ???

 

[IDIoit]

awesome pictorial!
i take it the only other differences in this block is the ballancer?

can ya grab a pic of the block id code?
FTFOI

 

[cpdenton]

awesome pictorial!
i take it the only other differences in this block is the ballancer?

can ya grab a pic of the block id code?
FTFOI

Yes. Balancer is different. Visually it looked the same, other than me writing turbo on it with a sharpie! You should see that later today Brian.


Pics of block casting and ID numbers. These are both 1994 blocks. First one is an idiT vin code K. Second was a vin M truck.

Turbo block

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And the 1994 NA block. Same casting, different internals.

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[IDIoit]

tech article nominee

 

[riotwarrior]

Any differences in main web area?