GregT Posted March 24 Share Posted March 24 2 hours ago, VitesseEFI said: Dunno about quakes. I do know that QC can be an issue. Previous company went through a fairly short phase of source CI pump casing parts from a Turkish foundry. Sizeable voids stuffed with car body filler and painted over don’t hold pressure very long! Interesting. The cam blanks I was told have a very low reject rate. Maybe a specialist foundry. Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted March 24 Share Posted March 24 13 minutes ago, GregT said: Interesting. The cam blanks I was told have a very low reject rate. Maybe a specialist foundry. most definitely a specialist foundry if they are doing 90% of the worlds blanks. Wouldn't be a small operation. Quote Link to comment Share on other sites More sharing options...
dmulally Posted March 26 Share Posted March 26 Yeah nah. I'll just have a backwards shift pattern tyvm. 1 6 Quote Link to comment Share on other sites More sharing options...
Popular Post yoeddynz Posted April 9 Author Popular Post Share Posted April 9 Theres a facebook group called 'Engine porn' suggested to me 2 nights ago. It looked interesting so yesterday morning at smoko time I put up some pics and a quick blurb about my engine build with a link back to the build thread here on oldschool. Thought they'd appreciate it and crikey - the response has been amazing Of course there's always going to be a Barry lurking... 4 12 Quote Link to comment Share on other sites More sharing options...
tortron Posted April 9 Share Posted April 9 Well Roland, it appears you have overlooked Honda's F1 developer designing the goldwing engine 6 1 Quote Link to comment Share on other sites More sharing options...
Popular Post yoeddynz Posted April 9 Author Popular Post Share Posted April 9 I'll post that up as a reply 13 Quote Link to comment Share on other sites More sharing options...
Popular Post dmulally Posted April 17 Popular Post Share Posted April 17 On 26/03/2024 at 14:15, dmulally said: Yeah nah. I'll just have a backwards shift pattern tyvm. 2 8 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted April 17 Author Share Posted April 17 @dmulallyjust wait until you see my knob... 4 Quote Link to comment Share on other sites More sharing options...
GregT Posted April 20 Share Posted April 20 If you're still going to pack the muffler, rather than fiberglass try what I use on racebike mufflers. Kart shops sell a muffler repack material which is a woven material in sheets about 500X500. It's quite thin so I think would fit between the perf tubes. I usually use stainless wire to hold it onto a perf core. It seems to have a long life in 4 strokes. The 2T karts saturate it in oil which is why they repack. Quote Link to comment Share on other sites More sharing options...
HumberSS Posted April 20 Share Posted April 20 22 minutes ago, GregT said: If you're still going to pack the muffler, rather than fiberglass try what I use on racebike mufflers. Kart shops sell a muffler repack material which is a woven material in sheets about 500X500. It's quite thin so I think would fit between the perf tubes. I usually use stainless wire to hold it onto a perf core. It seems to have a long life in 4 strokes. The 2T karts saturate it in oil which is why they repack. Stainless steelo pads are also a thing all over Yt muffler build jobs... Not sure how long they'd hold up though..? Maybe just pack it with all the swarf off your lathe! 1 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted April 20 Author Share Posted April 20 OK cool. I'll look into it. I do have a local fibreglass specialist down the road who I was going to see about some stuff. I've used pink batts packed over stainless scrubbers in the Datsun exhaust and its actually lasted quite well - its just the steel can rusting away that has not done so well. Btw - there's a great exhaust thread on exhaust stuff here on OS that I had skimmed through a while back but damned if I can find it! It was old but gold. Full of some good info. 1 Quote Link to comment Share on other sites More sharing options...
Raizer Posted April 20 Share Posted April 20 That's a lush muff! I've used FMF exhaust packing sheet on a couple bike mufflers, seems to hold up well and the packaging says it adds something like 4hp haha Got any plans on how to hide the valve actuators etc for cert/WOF? Could try make the cable look like it's coming from an O2 sensor lol Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted April 20 Author Share Posted April 20 I can always just remove the linkages or something at point of test. Correct me if I'm wrong but I think exhaust valves are only not allowed if operable from within the interior of the car ? I'm not sure and not bothered really. At this point in time I'll be happy if I can just adjust it with a lever in the engine bay. Got to get the car on the road first. Just bloody happy this bits finished!!! 2 Quote Link to comment Share on other sites More sharing options...
Raizer Posted April 20 Share Posted April 20 I was under the impression that they were a total no go in general unless factory fitted? I'm looking into ways to modify my Merc mufflers and hide a pair of valves in there, was told to hide the cables and controller well/try to convince WOF guys they are factory fitted AMG options haha 1 Quote Link to comment Share on other sites More sharing options...
bigfoot Posted April 20 Share Posted April 20 I got told that valves are allowed as long as both modes are under the noise limit 1 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted April 20 Author Share Posted April 20 I guess I'll find out in due course and luckily I can remove or lock the linkages if needed to pass a test. I highly doubt my wof testers here would know or even care. There's so many road legal cars and bikes about motueka that are waaaay louder than this will be. 2 Quote Link to comment Share on other sites More sharing options...
AllTorque Posted April 20 Share Posted April 20 9 hours ago, yoeddynz said: there's a great exhaust thread on exhaust stuff here on OS that I had skimmed through a while back but damned if I can find it! It was old but gold. Full of some good info. https://oldschool.co.nz/index.php?/topic/39978-muffler-tech/ Back box is looking great. You are such a clever cookie. 1 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted April 20 Author Share Posted April 20 Ahhhh cool. Cheers. I bloody searched for that thread again last night but damned if I could find it! Quote Link to comment Share on other sites More sharing options...
igor Posted April 20 Share Posted April 20 Four months to Hanmeet Alex. No pressure. 1 Quote Link to comment Share on other sites More sharing options...
chris r Posted April 21 Share Posted April 21 Could you add another cable to the throttle body/somewhere so if you are above 50% throttle for example it opens the butterflies 1 Quote Link to comment Share on other sites More sharing options...
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