hodge Posted October 20, 2011 Author Share Posted October 20, 2011 The whole point is I want to do it. And learn a skill or many skills. It defeats the object giving it all to a machine shop and asking them to do it for me. And how do I know there as anal as me in doing the work. Quote Link to comment Share on other sites More sharing options...
Hellstrom Posted October 20, 2011 Share Posted October 20, 2011 http://www.angelfire.com/ca4/CorvAIRCRAFT/RodBalance2.html Quote Link to comment Share on other sites More sharing options...
Scott Posted October 20, 2011 Share Posted October 20, 2011 Not quite. The main caps are the bit that goes round the crank and attaches the crank to the block. The big end is part of the rod. I thought the rod bearings were classed as the little end bearings? Big end = Main Caps Little end = rod caps This thread is going to be very interesting. I'm going to build up my engine myself but I'll be leaving all the machining & balancing to a machine shop. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted October 20, 2011 Share Posted October 20, 2011 Would appear I was wrong Scott, not uncommon lol. But when rod bolts get uprated to, say ARP I (incorrectly) assumed thats what the caps were. Suppose its a slang term of sorts, if someone said to me their big end had gone Id instantly assume the con rod bearing shells had gone. Quote Link to comment Share on other sites More sharing options...
imi Posted October 20, 2011 Share Posted October 20, 2011 Hodge - would be great if you could document the process as much as possible and post it in the thread. Always makes for a good reading and learning experience for the rest of us. Quote Link to comment Share on other sites More sharing options...
dude Posted October 20, 2011 Share Posted October 20, 2011 This thread is full of useful info Casting flash, I assume, is excess metal from the casting process when the block is made. So if you were to balance your own rods, where woud you remove material from? If you look in the block there is some horendous lumps of casting flash that you would not want floating around the bottom end !!!! The bottom of the rod will have a pad of metal that is what has already been used for balancing, after market rods have excess metal , tbh any decent aftermarket rod set will have a balance sheet with it. If you are keeping stock rods its worth the £20 a rod to get them resized. Quote Link to comment Share on other sites More sharing options...
little num Posted October 20, 2011 Share Posted October 20, 2011 Ive just fitted my engine back in after its rebuild and i spent £200 on having it all balanced and it was well worth every penny, its so much smoother you cant even feel it revving. And i was also going to do it myself but then i was upto £2000 on parts i decided id rather not as i might balls it up so deiced to get my engine people to build it for me and im so glad i did as they do things i could never do and you dont just pay for there time you pay for the years of knowledge and experiance. Quote Link to comment Share on other sites More sharing options...
dude Posted October 20, 2011 Share Posted October 20, 2011 What's casting flash?? And what's Glyptol?? Casting flash you will see , someone like Frost auto spares sell glyptol paint, this will stop and small pieces of casting flash etc coming away from the block and make the surface very slippy so the oil races back tpo the sump after it sprays off the crank etc. Quote Link to comment Share on other sites More sharing options...
Hellstrom Posted October 20, 2011 Share Posted October 20, 2011 a weight fixtur Quote Link to comment Share on other sites More sharing options...
SimonB Posted October 20, 2011 Share Posted October 20, 2011 I thought the rod bearings were classed as the little end bearings? Big end = Main Caps Little end = rod caps This thread is going to be very interesting. I'm going to build up my engine myself but I'll be leaving all the machining & balancing to a machine shop. The little end is the end of the rod that attaches to the piston via the pins. There is no separate cap - you slide the piston pin through the rod. The big end attaches to the crank and is in two parts or you wouldn't be able to attach it. The two parts attach with rod bolts - all this comes with the rod. The rod bearings sit in the big end of the rod and go between the big end and the rod journals on the crank. The main bearings sit between the main journals on the crank and the block on one side and the main caps on the other. Quote Link to comment Share on other sites More sharing options...
ibby Posted October 20, 2011 Share Posted October 20, 2011 Not quite. The main caps are the bit that goes round the crank and attaches the crank to the block. The big end is part of the rod. Here's a pic from my build thread showing the 7 main caps:- http://www.mkivsupra.net/vbb/attachment.php?attachmentid=78531&d=1215638187 Thanks Simon Quote Link to comment Share on other sites More sharing options...
SimonB Posted October 20, 2011 Share Posted October 20, 2011 I work in a machine shop Simon so I've got everything at hand I could need really for weighing etc. In that case, go for it! The cost of the equipment is the only reason I didn't do it myself. The place to remove material to balance the rods at the big end is in red on this pic, and the same at the little end. (These are carillo rods) Quote Link to comment Share on other sites More sharing options...
dude Posted October 20, 2011 Share Posted October 20, 2011 If you need to know anything dude give me a ring and I'll run thru it with you. Quote Link to comment Share on other sites More sharing options...
Scott Posted October 20, 2011 Share Posted October 20, 2011 The little end is the end of the rod that attaches to the piston via the pins. There is no separate cap - you slide the piston pin through the rod. The big end attaches to the crank and is in two parts or you wouldn't be able to attach it. The two parts attach with rod bolts - all this comes with the rod. The rod bearings sit in the big end of the rod and go between the big end and the rod journals on the crank. The main bearings sit between the main journals on the crank and the block on one side and the main caps on the other. Ahh makes sense, what is a little end bearing then? Quote Link to comment Share on other sites More sharing options...
dude Posted October 20, 2011 Share Posted October 20, 2011 Ahh, what is a little end bearing then? Some rods have a bearing in the little end that the gudgeon pin runs in Quote Link to comment Share on other sites More sharing options...
Scott Posted October 20, 2011 Share Posted October 20, 2011 Some rods have a bearing in the little end that the gudgeon pin runs in That's where I've been getting confused then. I take it the Supra doesn't have them? I'm guessing it's a roller bearing of some sort then? Quote Link to comment Share on other sites More sharing options...
dude Posted October 20, 2011 Share Posted October 20, 2011 That's where I've been getting confused then. I take it the Supra doesn't have them? I'm guessing it's a roller bearing of some sort then? Just a bronze bushing, so the rod is not worn out and it can be changed. Quote Link to comment Share on other sites More sharing options...
Scott Posted October 20, 2011 Share Posted October 20, 2011 Coolio Quote Link to comment Share on other sites More sharing options...
SimonB Posted October 20, 2011 Share Posted October 20, 2011 Here's a pic of a new carillo rod. You can see the bronze bushing at the little end, and the two halves of the big end bolted together with no bearings in there... Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 31, 2011 Share Posted October 31, 2011 (edited) I just see a picture of Matt Lennen's engine spat all over his undertray on facebook, noticed the stock main caps, made me think of this thread Edited October 31, 2011 by JamieP (see edit history) Quote Link to comment Share on other sites More sharing options...
Scott Posted October 31, 2011 Share Posted October 31, 2011 Ouch that doesn't look good at all. What power was that running Jamie? Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 31, 2011 Share Posted October 31, 2011 Matt owns the world’s fastest stock automatic transmission Supra, 8.8 at 152mph iirc, same terminals as ive done so similar power id guess. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted October 31, 2011 Share Posted October 31, 2011 What's casting flash?? Excess metal left from the casting process. Quote Link to comment Share on other sites More sharing options...
Scott Posted October 31, 2011 Share Posted October 31, 2011 Matt owns the world’s fastest stock automatic transmission Supra, 8.8 at 152mph iirc, same terminals as ive done so similar power id guess. Ahh, billet main caps were pretty much a necessity then Quote Link to comment Share on other sites More sharing options...
sdistc Posted October 31, 2011 Share Posted October 31, 2011 Great thread - lots of terrific information! Quote Link to comment Share on other sites More sharing options...
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