wizzard_al Posted September 8, 2011 Report Share Posted September 8, 2011 Then any measurement I take won't make a difference, because the stock rods have a different shape, and that won't tell you how much clearance they actually have, without my putting them in the block and measuring. As for the suggestion to modify the rods, would NEVER modify rods that way, might create stress risers if you didn't do a perfect job of machining them, and who knows how strong they'll be afterwards. (Maybe if I had the initial design parameters, knew the material, and could perform finite element analysis I might try to see if the rods remained strong enough, but I lack all of those facts or abilities.) Far better to notch the bottoms of the cylinders in the block. That is more than strong enough to mean you won't have to worry about unless you go hog wild and remove far too much. You need some clearance,beyond just avoiding the rod touching the block, due to heat expansion, but the notches in Johann's photo are not large and that is likely all you need. Link to comment Share on other sites More sharing options...
lookforjoe Posted September 9, 2011 Report Share Posted September 9, 2011 These are the rods I bought that were too wide. There aren't that many manufacturer's of these rods, I doubt you have a 'special case' where the standard notching won't resolve it. Notching the block as per Johann's pic is what it needed for clearance. Link to comment Share on other sites More sharing options...
ozzimark Posted September 9, 2011 Report Share Posted September 9, 2011 Also, this is the picture the seller of the rods sent me, as for what should happen to the rods DO NOT DO THIS!! Notching the bottom of the cylinder is the way to solve this problem without acquiring new rods. It should not take a significant amount of cutting to clear. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted September 9, 2011 Report Share Posted September 9, 2011 I loled. The way they are marked, crudely, to be cut is a BAD idea. I know what thhey meant to show, but what they are actually is narrowing the rod, not decreasing the radius. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted September 9, 2011 Report Share Posted September 9, 2011 Ok. Your specs were kinda odd but here you go. 1. Is stock. 2. is janky way they showed fixing them 3. Is a single cut. Its just a 27.5 mm radius. Probably 15 dollars a rod to do this an you will be fine. If you are going to cut them do it this way. Link to comment Share on other sites More sharing options...
Boxman Posted September 9, 2011 Author Report Share Posted September 9, 2011 If i were to cut the rods, the plan was to let Maxspeedingrods do this. They would modify one set of rods in a way that they will fit in my engine, and send them to me. I was not planning on doing this myself, as they have to be within +- 1 gram specification of each other. @ Che'-moderator; thank you very very much for your picture. This is indeed what's needed to be done. I will discuss with the manufacturer. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted September 9, 2011 Report Share Posted September 9, 2011 1g is pretty easy to hold. Not that it will matter once you add caps, bolts, and everything else on the rotating assembly.... And people wonder why I like the X-Beams Link to comment Share on other sites More sharing options...
Boxman Posted September 9, 2011 Author Report Share Posted September 9, 2011 Update; Seeing the pictures of the cut, Maxspeedingrods has agreed to produce fitting rods for my engine. Their mechanic will do research on how much should be cut. Thank you very much for your help! Link to comment Share on other sites More sharing options...
nadrepadre Posted September 10, 2011 Report Share Posted September 10, 2011 use a dremel on the bottom of the walls. Did it when i built a 347 stroker once Link to comment Share on other sites More sharing options...
Boxman Posted September 10, 2011 Author Report Share Posted September 10, 2011 That will be my last resort solution. Atm, Maxspeedingrods is carving some custom rods specifically for my engine. Link to comment Share on other sites More sharing options...
Boxman Posted September 14, 2011 Author Report Share Posted September 14, 2011 Okay well, another snag in the road. They don't know how much to cut off the rods. So, next question: Does anybody know the inner dimensions of the pre '99 block and the >'99 block? What i need is the total cylinder length. The pre '99 block has slightly longer cylinders, which causes my rods to jam. VIDA was no help, they only give the stroke length of 9.0mm, which is useless. I need to know how much more the pre '99 cylinder walls stick out at the bottom compared to the >'99 blocks. Link to comment Share on other sites More sharing options...
BlackT5 Posted September 14, 2011 Report Share Posted September 14, 2011 I would just get a refund and order a proper set of rods insead of going through all this BS. Link to comment Share on other sites More sharing options...
Boxman Posted September 14, 2011 Author Report Share Posted September 14, 2011 Well they're basically making me a custom set of rods right now, and they are much thicker than the RSI rods (thus stronger, i guess). These should hold up to 1000HP, whereas the RSI rods are not rated for any HP (though they have been said to go up to 480HP. Also those RSI rods are not available right now. Apart from that; anybody have these dimensions? Link to comment Share on other sites More sharing options...
Che'_Moderator Posted September 15, 2011 Report Share Posted September 15, 2011 Well they're basically making me a custom set of rods right now, and they are much thicker than the RSI rods (thus stronger, i guess). These should hold up to 1000HP, whereas the RSI rods are not rated for any HP (though they have been said to go up to 480HP. Also those RSI rods are not available right now. Apart from that; anybody have these dimensions? Could have just called pauter if you wanted 1000hp rods.... Either way "IF" Your specs were corrected I already posted what you need. 27.5 radius is the min you can get by with Link to comment Share on other sites More sharing options...
BlackT5 Posted September 15, 2011 Report Share Posted September 15, 2011 Well they're basically making me a custom set of rods right now, and they are much thicker than the RSI rods (thus stronger, i guess). These should hold up to 1000HP, whereas the RSI rods are not rated for any HP (though they have been said to go up to 480HP. Also those RSI rods are not available right now. Apart from that; anybody have these dimensions? lgspeed.se Lars uses the same "china" rods as several other suppliers and has shown 900+hp in his Audi S2. Usually takes a week from purchase to delivery from Sweden to North America. Link to comment Share on other sites More sharing options...
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