Identifying a piston and rod

[FlabbyMidgets]

I have this con rod to input into to cad and complete some analysis on it.

Could someone please help identify it? I have googled every number on it and can't find anything. The code on the bottom scans in as 000180103

[227bhp]

You've absolutely no idea where it came from? I'm stumped as to why you'd want the spec of a rod when you don't know what it came out of....
A pic of the piston crown would be very useful.

[FlabbyMidgets]

227bhp said:

You've absolutely no idea where it came from? I'm stumped as to why you'd want the spec of a rod when you don't know what it came out of....
A pic of the piston crown would be very useful.

Its part of a uni assignment, about using fea. By finding the spec I'd like an idea of the forces involved, and something else to write about. I'd like to know how the rod being offset at an angle affects its strength. I know its a strange thing to ask.

Here's a pic of the crown

[cptsideways]

Looks like a Japanese Toyota hypereuretic(sp) forging, fairly modern but from a slightly odd engine design.

[FlabbyMidgets]

Solved. It's from a jaguar aj133 5.0 V8.

Not sure whether or not it is supercharged or not, I don't know if the con rods were the same or varied between engine

[cptsideways]

Not a bad guess, quick google reveals possibly a Subaru engine but they are probably made by Toyota, I'm pretty sure that logo is the old Toyoda logo.

ETA

Possibly not then, but they look Japanese made

[227bhp]

I would be interested to know why the big end if offset like that too, I've seen them, but never worked on an engine with them in so have had no need to investigate it.
Is it just the rod you are examining or piston too? I can give some pointers on what to look out for on the piston.

[Mogsmex]

the big end is offset as it's from a Vee engine - when there all in place you can easily do the rod bolts up as there on a flat plane

[FlabbyMidgets]

227bhp said:

I would be interested to know why the big end if offset like that too, I've seen them, but never worked on an engine with them in so have had no need to investigate it.
Is it just the rod you are examining or piston too? I can give some pointers on what to look out for on the piston.

I think I'm going to look at both rod and crank, as I have now found the right crank shaft. Drawing up in cad may not be too fun but a learning curve all the same.

Id still be very interested in your advice, I'll send a pm

[FlabbyMidgets]

We have a match.

[227bhp]

Mogsmex said:

the big end is offset as it's from a Vee engine - when there all in place you can easily do the rod bolts up as there on a flat plane

I thought that, then I looked at some V6 rods and they looked the same as I4 ones.

[Mignon]

227bhp said:

I thought that, then I looked at some V6 rods and they looked the same as I4 ones.

Older V8 and V6 engines had fairly open blocks down at the bottom end with big wide sump pans and plenty of room to get a socket on the big end bolts pointing down from the other side of the V. With more modern narrow block designs and small sump pans you need the rod bolts vertical. It's certainly not ideal for bolt loadings so those will be made bigger than might otherwise be the case.

[227bhp]

FlabbyMidgets said:

227bhp said:

I would be interested to know why the big end if offset like that too, I've seen them, but never worked on an engine with them in so have had no need to investigate it.
Is it just the rod you are examining or piston too? I can give some pointers on what to look out for on the piston.

I think I'm going to look at both rod and crank, as I have now found the right crank shaft. Drawing up in cad may not be too fun but a learning curve all the same.

Id still be very interested in your advice, I'll send a pm

I don't do private tuition It's a forum for discussion, if you post on here there are others with good ideas too.
There's a tell-tale sign on that crank if you can turn it 90 degrees anti-clockwise so we can see that line that's running down it.

[FlabbyMidgets]

227bhp said:

I don't do private tuition It's a forum for discussion, if you post on here there are others with good ideas too.
There's a tell-tale sign on that crank if you can turn it 90 degrees anti-clockwise so we can see that line that's running down it.

My main area of study will be the con rod, particularly looking at Safety factors and Goodmans diagrams. Also paying attention to the bolts, can I make changes etc.

I'd like to add on to this, expanding more and looking at the crank and piston. Out of interest but also to build up my Cad skills, drawing and testing. I'll take a pic of it now

[FlabbyMidgets]

Is this what you meant?

[Boosted LS1]

A thin joint line means it's a cast crank. A wide joint line means it's a forged crank. The rods are powdered metal forgings and the cap is deliberately broken from the rod. The pistons are cast.

Edited by Boosted LS1 on Wednesday 19th December 10:40

[DVandrews]

227bhp said:

I would be interested to know why the big end if offset like that too, I've seen them, but never worked on an engine with them in so have had no need to investigate it.
Is it just the rod you are examining or piston too? I can give some pointers on what to look out for on the piston.

On small bore engines the angled split line narrows the footprint of the rod as it is inserted into the bore, otherwise the crankpin might need to be unfeasibly small in order for the rod to fit down when building the engine. Whether that is the reason on this engine is hard to say without seeing the dimensions.

Dave

[Emanresu]

L322 Range Rover 5.0. Built a few.

[gordmac]

You can calculate the tensile load from the deceleration of the piston, they break when you lift off at maximum revs!