Speedtripper

Ok, no worries. I have no other block to compare it to, so can only call it as it is. As we never got the Maxima diesel, is it possible that it comes from an older model of something else? Info on the LD28 is not conclusive. I was led to believe that we got the diesel in some older model Patrols. Either way.... I will forge on.

Wow! I wonder if there are different versions - based on year? The engine number on mine is: LD28 180644 how does that compare to yours?

My apologies to all. Having checked a pm which I received some years back, the convo I had was with Peter at PMC: "we off set grind the crank (RB30) to 89mm stroke thats why we run the 48mm pin , and there fine , have run them in 700hp turbo rbs for the last 5 years " and not LCR. I'm getting old and all Aussies look the same to me. ; ) Lurcher you are correct - that is an entirely different set up. And a price tag in a different time zone I might suggest. My build is for those who can't afford that spec and/or like to do as much of the prep themselves. I would like to put a question out there regarding a camshaft. As this is going to be as street car, and where I live is pretty hilly I require something which will give good performance but not require riding the clutch all the time. Any suggestions? I'm hoping for something in the 300hp range. But street-able. My thinking is that with the extra cc I can tone the cam down. Possibly around the 290 degree mark? I will build my head around that - valves sizes and CR. Anyone with similar specs, that can report back? I do have a set of 45mm ITBs on my car so that should be sufficient. Pictures of which are in my gallery. You will see the LD28 on the stand too. I will update with some more pictures soon. My car is about is about to undergo a complete tear down, so this engine will not be running for a while. I will however post as stuff happens. If anyone would like any specific info on the build, just let me know and I will be happy to reply. Please remember that this is a low-budget build, using as many off the shelf parts as possible. Thanks for any input, in advance.

Thanks Tony. I am aware of that. They use a modified RB30 crank which involves the widening of all journals, and machining to snout and flywheel flange. Honda rods are used and special pistons with a low comp height to make the rod ratio acceptable. I don't live in Australia so having someone build one for me is not an option and besides that, where is the fun? This is a slightly different approach, being based on the LD28 block. I have read plenty of thumb suck info regarding this block, probably because of the 'small' pistons it houses. There is a lot of presumption regarding wall thickness etc. I have also read suggestions about using liners. It is not necessary. I have the block sitting in the garage, machined to 89mm. The wall thickness is not less than 3mm at any point based on 12 measurements in each bore. I thought about going 89.5mm but decided that another rebore in my pocket was a safer bet. My approach is to use as many "off the shelf" parts as possible. The only specialized work is the welding and offset grinding to the crank. I agree with a previous post of yours where you stated that a lot welded cranks if done correctly see years of service. The point is to find someone who specializes in crankshaft repairs, and not a run of the mill shop - pardon the pun. Finding LD28 blocks in South Africa is not an issue. A contact has a fleet of Patrols which have been converted from petrol to diesel, and as they run out of rebores they become scrap. There may be people in other countries which also had the diesel motor, so this build might be of interest to them. I appreciate that this is a very old thread, but if anyone is interested, as I said, I will update the information.

...and what happened??? Not sure if this topic is no longer the flavor of the decade, but I am in the process of a very similar build with a LD28 block. Block has been bored to 89mm. Min wall thickness of 3mm. Interesting to see the wall thicknesses are in the 3mm - 5mm range. So there is some shift in the core. I have decided not to use the LD28 crank as it would also require welding, so have opted to use a L28 which is being welded and stroked. Currently set at 90mm. Using the forged 4g63 rod (149.86mm) with the 48mm big end. Small end has been rebushed to 21mm. Piston is a standard 89mm KA24E. Piston requires a 1.4mm skim to remove the slight dish. This gets it to a 0.01 positive deck height for use with a 1mm gasket. Interesting to note that despite the increased displacement - 2.8 to 3.35 there is a weight saving of 257g per cylinder over the standard L28 piston and rod. Standard is 1355.6g. New rod/piston combo is 1098.6g If anyone is interested in this build, let me know, and I will post as things happen.

...that's the power of the interweb for you.