BMW Connecting Rod Modifications

[schlusselmensch]

I know chaps who, if you layed those rods on the ways like that, would pick them up and hit you with them.

[upmykoolaid]

@dstyleshansta - what do you mean? Like pull out the plug so engine doesn't roar n bake the cables? Like in the oven n shit? Is that what u mean? Let me know man..

[fiatnutz]

@upmykoolaid - What is your question? I'm not sure that I understand what you mean by the 'bake cable' and the 'oven'????????

[fiatnutz]

They are factory balance weights

[brendanraymond]

what are those lumps of steel hanging off both ends of the rod? its not the first one I have seen... would you have any ideas why they would do that?

[bddc201]

Way too heavy on the cut. That insert was SMOKED! I almost never go more than half of 1mm on a facing cut, but never on interrupted cuts.

[TheTalonTsi]

isnt griding down that metal going to reduce the rods integrity? idk i could be wrong

[causticblood]

What rpm are you running at? How about ipr? Thanks for the vid.

[iceCOLDkillaxDLoL]

These are MOTINS Serbian connecting rods. Am i right???

[TheBakiralnaif]

its excellent film on BMW Engine parts

[jayguy173]

looks dangerous

[mainman2999]

wow, that 40 thou cut was sure knocking hell outta the cutting bit, wouldnt you normally go in in slightly smaller cuts than that? it sounded a lot of shock on the bit tip, and no squirt of lube either? nice job.

[faisalabulaziz1]

got a bmw m30b35 engine from a e23 745i turbo would love to do something similar to it

dont know how much for shipping an engine,,,:)

[bigjimWA77]

Great, really educational, thankyou. I wonder though does the machining near the bolts not weaken the big end somewhat ? Thanks again though, these vid's of yours are great viewing.

[aurelrica]

ok now put some videos of how you mach the new wheigt of the rods plus pistons with the cranckshaft please... greetings fom italy

[koukoudaman]

He says it very clearly in the video...

Saves about 28 grams.

[aurelrica]

@koukoudaman ok but after saving wheigt from pistons, rods you have to mach that wheigt with the conter wheights of the crankshaft wright? it's not enough to pair the oposite piston/rods (for eg in a 4 cyl engine) the conterwheight of the crank must be equal whith the wheigt of the piston plus bolt plus a partial wheigt of the rod otherwhise will not bee neded (the conterwheight)

[HexenHutch]

Das kann ja wohl nich dein ernst sein???!!!

Naja rundlauf und genauigkeit scheint ja egal zu sein!!!!

HILFE

[Stummel01]

wen juckts wenn das teil aussen 0,05mm eiert?? original ists roher guss...

[HexenHutch]

Wer redet denn von aussen?? Mein die "ungaublich gute" 3punktspannung mit nem futter was definitiv nicht synchron spannt!!! und das am kurbelwellensitz..............­..

Wenn er mal die Rundheit messen lassen würde, würde er es sicher nicht mehr so machen!!!!!!!!!!!!!!

[Stummel01]

und? plastisch verformt sich da nix... also was solls??

[HexenHutch]

Na dann: MACH`S mal, lass es in nem messlabor messen und dann siehste mal!!!!

Normtolleranz für Kurbel / nockenwellensitze, zylinder etc. etc.: Rundheit kleiner 3my!!!!!!!!!!!!!!!!!!!!!!!!!!!­!!!!!

[DStylesHanska]

at 5:12, did you turn it your way so that if it takes off it flies to the wall/down? Safety first :)

[UberWagen]

Is that a modified brake lathe or something you were using to cut?

[fiatnutz]

I used an engine lathe.

[bunky060171]

If I recall, BMW uses 'fractured rods'. The casting is made, roughed in, and then fractured across a predetermined point, this gives a cap that fits exactly into position. Not sure if this is why the tang slots are 180deg apart. Bolt it back together and finish machine the big end. Cool video.

[henz283328]

hello is there anyone knows where to find a job in sydney for engine reconditioning?

[albercarri]

Just an advice! Clear up the mess you have on top of the gearbox of your lathe, vibrations can make then roll on the spindle.....and you probably know how the story could end

[jdmfreak1992]

Man for stock rods those things are beefy. But still nothing compared to my rod from a top fuel racer lol.

[pyro8818ak47]

I work on engines myself most sbc or bbc or some mopar and ford but that is really neat. Fiatnutz do you think this is a dying art of rebuilding engine? Alot of people are saying that engine rebuilding will die off but to have a engine rebuilt you can have them run better than when they came out the factory

[joness105639]

just rebuilt the engine in my MG Midget. What an expirience.  I started with something that wouldnt run, and was rusty, and ended up with a beautiful piece of engineering all resplendent in light metalic green paint.

[fiatnutz]

I don't know if I would call it dying, but those of us who have been at it fro more than 40 years are dying off. The industry is somewhat mature and only those people who make an investment in good equipment and can do the odd-ball stuff are going to stay busy. If you just rebuild SBC & BBC engines, your career is over and you don't know it yet. If you haven't transitioned over to import engines, than you are way behind the curve.

[marek0086]

thats a real neat trick!

HOWEVER!.....i dont think u would actually feel a difference in accelaration!

[fiatnutz]

It's not immediately apparent, but on paper the path proves this out to be worthwhile. Like so many little things, byt themselves they don't amount to a big pile, but add up all the small things together and you start seeing measureable results on the dyno and track. Thanx for the comment! JE...

[zyou8er]

@fiatnutz Hi, is it possible to make the rods and crank wider, so one can use wider bearings for drag race purpose? Thanks.

[wordwagon77]

these rods made of cast iron? or steel? hard to say. i figured if it was steel it'd be hardened and if so , that flimsy carbide tool wouldn't of touched it.

[baskoid]

He describes it as a "forged" rod, so it's steel. Not sure cast internals where that common in the late 60s early 70s when the 2002 was made. But I would like to know what make those carbide tools are.

[hybridracers]

you can forge steel aluminum and a myriad of other metals

[baskoid]

Indeed you could, but we need to consider the context here, if this rod is forged it will be some kind of steel.

Given that Wordwagon77's assumption that it would be hardened is not a million miles off, but unlikely on a prod engine I guess.

[wordwagon77]

these rods made of cast iron? or steel? hard to say. i figured if it was steel it'd be hardened and if so , that flimsy carbide tool wouldn't of touched it.

[hybridracers]

youre more of a tool than the carbide tool because you obviously know jack shit about machining. Forged anything means nothing as far as hardness.

[wordwagon77]

your a tool for reading a year old comment bro ha

[hybridracers]

yeah wasnt aware the this was a live conversation.....unfortunately for you the infamy of being a dumbass is forever.

[wordwagon77]

ya u were not aware cause ur a moron.

[eligoldratt]

Whats the main difference between Con rods made with a nut-bolt system and another with a screw?

[mageac]

not a lot really, i prefer the bolt/screw style, seems like less things to go wrong to me

[enginemasterbuilder]

havent heard a word from you in a while . i purchaced your new book. i need you to sign it

[enginemasterbuilder]

The question about the late just came off the top of my head. heres The "Pm" . I was thinking about the rod rotating in the lathe the same way as it would on a crankshaft. Thinking Hmm what would that do to 'Bearings'' in a Imbalanced situation, probably ? guessing here but would you call it high and low spots, polished sections or improper seating.

[enginemasterbuilder]

sorry John what is a Pm oh and look me up on facebook engine builders asscoc have a look at my smallblock

[fiatnutz]

Go to my website and leave Private Mail/Personal Message there and post your link. Thanx... JE...

[TheCordiaMASTER]

There was more to grind away which you havent, i dont know why.

Basically the squarish chunk of metal ontop of the gudgeon area.

Can you mention, why that wasnt removed.

[enginemasterbuilder]

question ? with that rod running on the lathe wouldnt that cause an awful imbalance, also would it be hard on the headstock berings

[fiatnutz]

With a good lathe, this isn't an issue, but you are correct there is an imbalance, however the speed isn't so fast that the machine wants to shake. Thanx for viewing and your questions. John...

[enginemasterbuilder]

YES YOU HAVE A VERY SUCESSFUL VIDEO OH AND YOU WOULD LIKE TO CHAT IM ON MSN @ENGINEASSEMBLER@HOTMAIL>com name is peter

[fiatnutz]

Peter, send a PM and tell me more about this forum. John...