87 replies to this topic

[N/A-PWR]

Good Luck Brian,

 

The 30/70 Cam is great, pulls in at 3100rpm in a 208 (0.060 over),

 

and stay's in till about 7000rpm.

 

Your choice of Blue motor is the goods with the better balanced crank and engine components.

 

I can only suggest a good breathing Red 9 port head. 

[Potta]

Quick thread steal but I have a blue 3.3 with a 12 port head and it also has those extra protrusions on the Inlet and exhaust manifolds.

 

Are they to enable turbo fitment?

 

Or something else?

[S pack]

Craig do you mean the open tube approx 32mm dia protruding from the exh manifold? That is for air pre heat stove pipe to the air cleaner snorkel.

Edited by S pack, 13 December 2015 - 12:09 AM.

[Potta]

Ah ok, I know the one, of course.

 

What about where that plate is on the Inlet manifold?

[S pack]

On the inlet manifold there is a heat deflector under the fuel pipe connection. The big round rusty canister is the EGR valve and the other canister mounted to the left of the EGR valve is the exhaust heat valve actuator.

Edited by S pack, 13 December 2015 - 12:21 AM.

[warrenm]

I would bore the engine to .040", that way you still have some bore thickness & you can still bore to .060" should something bad happen down the track.  

[yel327]

How come one side is all corroded and the other is cleaner and still painted? Engine bay fire?

 

It may actually be a "black" engine if it is from a WB (as the sump suggests), these ran until the end of 1984 so after VK release are VK engines painted blue. Is the engine number pad machined or rough cast?

[yel327]

Later 1981 into early 1982 for WL2660xx so still a proper blue engine. It is later 1983 that they start to be black motors painted blue.

[N/A-PWR]

Hi Yel,

 

I did noticed there was a difference in the head design of a couple of WB blue motors I got here, 

 

and am now wondering if one of them is the black painted blue.

 

Question is, how do I tell which is the black one, hmm?

 

Later 1981 into early 1982 for WL2660xx so still a proper blue engine. It is later 1983 that they start to be black motors painted blue.

 

 

 

 

Like Button for you. 

[N/A-PWR]

Sounds feasible Brian. 

 

My understanding the blue and black carb head are the same , the EFI head, I believe has a different port shape, all share the same size valves

 

 

Like Button for you too.

[yel327]

Hi Yel,

 

I did noticed there was a difference in the head design of a couple of WB blue motors I got here, 

 

and am now wondering if one of them is the black painted blue.

 

Question is, how do I tell which is the black one, hmm?

 

 

 

 

 

Like Button for you. 

 

In general terms look at the engine number pad if the engines are complete. Blue should be mostly cut whereas black are rough cast. You will also be able to tell by engine numbers if you can find a few very early VK's to see what number they have, and the WB ones higher than that should be the later engines. As a ballpark around 400000.

 

Noting that WB still retained the VC and later VH head part numbers, they didn't change to VK part numbers but that doesn't mean the castings aren't the same. Interesting that VK 2.85L engines kept the same part numbers as VH for the heads though, however you'll have to ask Kiwis or the like what these heads are like. I can't guarantee you that WB's didn't continue with the same older head or change to VK head and if when, but it makes sense for GMH to make them all the same.