daver clasper Posted May 19, 2017 Share Posted May 19, 2017 HiNot got one of these fitted on Vitesse.Looking at pictures on the net, it looks like a square metal plate fitted, with a gap between R/C breather hole.Is that about right.How important is it. I have the original PCV valve fitted which I thought may serve this purpose.Any help, great please.Cheers, Dave Quote Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 19, 2017 Share Posted May 19, 2017 theres some on ebay , its not overly important , but a gauze in the line is prefered to a flame flash back eg http://www.ebay.co.uk/itm/RANG.....WE8l171TITEslc4rTq4wsome have a pot scoured plastic gauge mesh inside , wire ones break up with vibration and end up inside the inductiondont loose sleep over it but its something to play with while its raining.Pete Quote Link to comment Share on other sites More sharing options...
JohnD Posted May 20, 2017 Share Posted May 20, 2017 Is it a 'fire' trap?I thought it was an oil droplet catcher, limiting the amount that gets into the intake.John Quote Link to comment Share on other sites More sharing options...
daver clasper Posted May 20, 2017 Author Share Posted May 20, 2017 Hi and thanksI think I read somewhere that PVC valve also acts as flame trap. Could well be incorrect info.Cheers, Dave Quote Link to comment Share on other sites More sharing options...
JohnD Posted May 20, 2017 Share Posted May 20, 2017 Why this obsession with 'fire trap'?Yes, the crankcase is full of oil vapour and droplets, but so saturated that it would not explode. Do you remember the "Syrup tin experiment" at school?Here it is - the teacher's using a Milo-tin (?) but its the same.Not until the tin (crankcase) contents reach the right mixture of air and gas does it explode.https://www.youtube.com/watch?v=fQiSCsuxE-kJohn Quote Link to comment Share on other sites More sharing options...
esxefi Posted May 21, 2017 Share Posted May 21, 2017 OT^^what size are the connections?you can employ the same theory for gas speed as that used in the induction and exhaust ie the smaller the bore the faster the speed,a small bore will carry oil vapour further down the line and result in clogging a filter sooner.best bet is large typically 3/4" or more(to be honest I would go 1"on these engines) breather hoses to allow drop out of oil mist into a catch tank.course it all depends on how worn and how much the engine breathes.OP as john says I thought it was more of an oil baffle than a flame trap Quote Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 21, 2017 Share Posted May 21, 2017 The gauze reduces the risk any flame crossing the barrier same principle as the Davy lampused by many makers in the 70s dont think triumph ever used a seperate one , as barrier was inside the tin covers, as were opel /Vx cavaliers, used to block up Hunter Avenger, Rover Sd1 etc had them in the tubes Pete Quote Link to comment Share on other sites More sharing options...
daver clasper Posted May 21, 2017 Author Share Posted May 21, 2017 ThanksI didn't know anything about this, hence my original question "is it important?" Not really an obsession.Anyway, nice to know it's something I don't have to anything about, for a change.Cheers, Dave Quote Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 22, 2017 Share Posted May 22, 2017 And with a alloy cover on my 2000 I dont have one either Hmmmm ,,I may just get one now we have talked about it pete Quote Link to comment Share on other sites More sharing options...
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