Typhoon Member 564 Member For: 19y 6m 26d Gender: Male Posted 08/02/23 01:05 AM Share Posted 08/02/23 01:05 AM (edited) something not right there Puff. ive been running a solid tensioner from day one, and Dion from Dynomite has always told me to run the chain tight, and I do. are you running an oem or billet guide? Im just not so sure how the chain snaps like that. is that an Atomic posi stop? they are also having heaps of issues from what I’ve heard. very odd Edited 08/02/23 01:09 AM by Typhoon Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,116 Member For: 9y 2m 20d Gender: Male Location: South Australia Posted 08/02/23 01:28 AM Author Share Posted 08/02/23 01:28 AM Full Atomic timing set, including posi stop. What issues have you heard about? Pm if you want to keep it private. Link to comment Share on other sites More sharing options...
Typhoon Member 564 Member For: 19y 6m 26d Gender: Male Posted 08/02/23 01:47 AM Share Posted 08/02/23 01:47 AM (edited) just that they are having all sorts of issues with them, the posi stop included. Brad has even mentioned it in a round about way on a recent youtube video. I have heard of others having similar issues running a posi stop. sorry I can’t go into more specifics, as I don’t really know much more then that, but its the one common thing that keeps popping up. Is that the same tensioner you were running when it snapped the chain last time? examine the tensioner carefully, I have heard of the posi stops having major failures Edited 08/02/23 01:52 AM by Typhoon Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,116 Member For: 9y 2m 20d Gender: Male Location: South Australia Posted 08/02/23 01:52 AM Author Share Posted 08/02/23 01:52 AM No it's a different tensioner. The chain snapped last time because the oil pump exploded, lost oil pressure and seized the cam in the head. This time is appears to have snapped randomly, at least until I get it open and have a look. Link to comment Share on other sites More sharing options...
Typhoon Member 564 Member For: 19y 6m 26d Gender: Male Posted 08/02/23 02:08 AM Share Posted 08/02/23 02:08 AM what type of tensioner were you running last time? Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,116 Member For: 9y 2m 20d Gender: Male Location: South Australia Posted 08/02/23 02:18 AM Author Share Posted 08/02/23 02:18 AM (edited) It was an "atomic" tensioner from golebys, however it was just a factory tensioner with an A half assed engraved in it. I had a quick look at the car again, rocker cover is loose, I can see what looks like indications that the tensioner failed. It has chipped teeth on it. There are a couple of chipped teeth on the exhaust cam gear too. Perhaps I should have wound the lock in further? I left it with a tiny bit of slack so it wasn't pushing on the chain too much and relied on the tensioner for the main tension, with the lock as a backup. I'll test this theory on the weekend with another chain I have here. I'll pull it down in the weekend though, too farken hot to do it now. Edited 08/02/23 02:18 AM by Puffwagon 1 Link to comment Share on other sites More sharing options...
Typhoon Member 564 Member For: 19y 6m 26d Gender: Male Posted 08/02/23 02:45 AM Share Posted 08/02/23 02:45 AM sorry to hear you have had issues with this fresh build Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,116 Member For: 9y 2m 20d Gender: Male Location: South Australia Posted 08/02/23 02:51 AM Author Share Posted 08/02/23 02:51 AM Cheers, I can guarantee you someone else/workshops have done the exact same thing in their development, we just don't hear the bad side of things, only the good. At any rate I won't be reusing an Atomic tensioner going forward, I'll hit up DMP for a tensioner and chain when the time comes. Link to comment Share on other sites More sharing options...
Slowxr6t Member 515 Member For: 5y 4m 15d Location: New zealand Posted 08/02/23 04:21 AM Share Posted 08/02/23 04:21 AM @Typhoon when you say you run a solid tensioner do you mean a posi stop atomic one or stock one? I've put a posi stop on my 400rwkw barra, should I put a stock oem one back on? Link to comment Share on other sites More sharing options...
Typhoon Member 564 Member For: 19y 6m 26d Gender: Male Posted 08/02/23 05:06 AM Share Posted 08/02/23 05:06 AM I run this one mate. https://www.dynomiteperformance.com.au/product-page/mechanical-timing-chain-adjuster An absolute *beep* to adjust, but once you do it’s fairly well set and forget. Do need to run a billet guide with it however as it beats the hell out of the oem cast item. no issues, just need to always replace the oem guide as they are soft cast, we’re the billet guides are just tougher, and last. The Atomic tensioners have got an absolute shocking reputation as of late. Its been all over facebook Use OEM or mechanical type, With mechanical type the oil feed needs to be threaded and blocked. Link to comment Share on other sites More sharing options...
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