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Welding Clylinder Ears ?
Posted by
Frogzilla
on 07 Mar, 2013 19:13
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I got a queston about welding the clylinder ears . When do you need to do it ? When you raise the compression , if so what ratio/psi . Or does it need to be done when you start replacing the pipe and carb ? Or should you weld them the first time you need to bore the clylinder ? Does the big reed have more problems than small reed ?
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Over the years I been told many different reasons.
01 The 87 don't have the frame support like the 88 and jumping the 87 can cause cracks.
02 Due to the more aggressive porting that is out now that can weaken around the ears
03 I would only do this if a bore is required are having a aggressive porting done, you will loose a bore when welding ears due to warpage, your cylinder will also need to be decked from the bottom to be squared with top and you will be required to use a thicker base gasket when assembling to keep port timing correct.
If I missed any thing I sure SQ-HQ members will add more.
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#2 Reply
Posted by
El Diablo
on 07 Mar, 2013 20:24
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Is it necessary? No. My old Tudor's engine was not reinforced. However it did crack & was repaired again. My currant engine that was originally done by Duncan was not reinforced either.
I have it done now & I would recommend it to everyone. It does add rigidity to the cylinder. Even if you don't need it, it's like an insurance policy. It's good to have.
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Iv had 2 stock cylinders with cracks i bought the zilla with them... seems pretty common I guess....my current cylinder is welded no issues
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#4 Reply
Posted by
Q2W
on 08 Mar, 2013 09:12
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All 500 jugs will crack eventually. If you do any work, best to weld ears for insurance.
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#5 Reply
Posted by
Buckeye513
on 08 Mar, 2013 11:32
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Anyone have a picture of what welded cylinder ears should look like?
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#6 Reply
Posted by
Nopick
on 08 Mar, 2013 13:18
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#7 Reply
Posted by
Frogzilla
on 08 Mar, 2013 18:22
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I think that answered my question. I will have it done, that will leave me three bores sizes to go. Besides the Zilla money pit is starting to settle a little bit, time to throw in more cash.
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#8 Reply
Posted by
Buckeye513
on 08 Mar, 2013 21:23
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I don't mean to be dumb but I'm not sure what I'm looking for in that picture.
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#9 Reply
Posted by
QuadMan8
on 08 Mar, 2013 23:18
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ball park what does this cost to have done---dont you typically have to bore the cylinder once over after welding it up.
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#10 Reply
Posted by
El Diablo
on 09 Mar, 2013 09:20
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I don't mean to be dumb but I'm not sure what I'm looking for in that picture.
See the part of the cylinder where it gets bolted to the case, right next to the intake area? It is beefed up around the ears. The stock ears sometimes crack or even break off.
ball park what does this cost to have done---don't you typically have to bore the cylinder once over after welding it up.
Price will depend on who does it. And yes, the cylinder will need to be re-bored as well as decked.
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#11 Reply
Posted by
Nopick
on 09 Mar, 2013 16:18
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It was $100 for that one but I was having a bunch of other work done at the time. Just call around and get some prices. 500 Fanatic did mine.
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#12 Reply
Posted by
GrkGuy
on 09 Mar, 2013 19:03
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just about ever builder can do them, just make sure you get someone that does them .
not someone that just says that they can. lots of stuff needs to be checked after it gets done.
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#13 Reply
Posted by
Duneatic70
on 10 Mar, 2013 11:52
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Go to Jerry Halls forum on this website & he will beable to help you!! He did mine & im really impressed with his work!!!
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#14 Reply
Posted by
Motoman991
on 15 Apr, 2013 05:33
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I don't mean to be dumb but I'm not sure what I'm looking for in that picture.
It's the two main bolts by the intake that hold the cylinder to the tranny.
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#15 Reply
Posted by
Gillio
on 15 Apr, 2013 05:41
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I think Jerry will tell you that all gasket surfaces will need to be decked after the weld up.
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#16 Reply
Posted by
Motoman991
on 15 Apr, 2013 05:49
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The gasket surfaces should be decked. The extreme heat of welding will distort the metal.
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#17 Reply
Posted by
Buckeye513
on 15 Apr, 2013 06:35
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Does this still need done if you don't run top motor mounts?
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#18 Reply
Posted by
Motoman991
on 15 Apr, 2013 07:09
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Does this still need done if you don't run top motor mounts?
It's a good safety precaution.
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#19 Reply
Posted by
Nopick
on 15 Apr, 2013 07:19
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If you are putting money into your engine for performance and reliability, get it done. It is not expensive and could save you from having a catastrophic failure where a crack develops and propagates up through the intake tract. Essentially causing the part of the cylinder the reeds sit in to break off.
There was a picture of that failure on this site or the old site.
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#20 Reply
Posted by
AustenW
on 19 Jan, 2014 00:09
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Can someone add some more pictures of what's been done?
I'm based in the UK and just in the process if getting this done
Stripped the jug yesterday, acid dipped it and bead blasted it
I was going to reinforce it above the top reed bolts, what else should I do?
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#21 Reply
Posted by
Hawaiiysr
on 19 Jan, 2014 00:25
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Anyone have a pic of failed ears?
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#22 Reply
Posted by
LT250RWV
on 19 Jan, 2014 02:39
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Here is a couple pics. Jug had one hour after rebuild. Get them ears welded.
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#23 Reply
Posted by
Buckeye513
on 19 Jan, 2014 06:43
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Here's a cylinder in the process of having the ears welded. Might not look the same for every builder. These are of a guy on facebooks cylinder he did himself.
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#24 Reply
Posted by
Zilla273
on 19 Jan, 2014 13:04
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Ive been told that detonation can cause the cracks around the ears
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