skauldy Posted March 1, 2017 Share Posted March 1, 2017 Guys, looking at a air filterhousing. It can supply 1450 cfm. I'm sure this is plenty but what is this like compared to the oem filter housing, shane Quote Link to comment Share on other sites More sharing options...
Chicken Drumstick Posted March 1, 2017 Share Posted March 1, 2017 I can't answer your question. But suspect it matters not in the real world. A 200hp low revving RV8 really isn't pushing that much air through it. Quote Link to comment Share on other sites More sharing options...
Disco-Ron Posted March 2, 2017 Share Posted March 2, 2017 (edited) 4.2 x 6000 rpm = 25200 cubic ltrs per minute. So convert that to cfm and there's your answer..... that assumes it'll rev to 6k! Roughly 890 cfm! Edited March 2, 2017 by Disco-Ron correction 1 Quote Link to comment Share on other sites More sharing options...
skauldy Posted March 2, 2017 Author Share Posted March 2, 2017 Cool, thanks guys. Hit the buy button Didn't want to suffocate it with the wrong filter shane Quote Link to comment Share on other sites More sharing options...
neil110 Posted March 2, 2017 Share Posted March 2, 2017 I think the highest I have ever revved my 4.2 is about 4,000 and by that stage it is screaming. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted March 3, 2017 Share Posted March 3, 2017 Sounds good at 5500 rpm to me Quote Link to comment Share on other sites More sharing options...
neil110 Posted March 3, 2017 Share Posted March 3, 2017 Nah, by the time you get that many revs on you can't hear the engine for the sound of the petrol tank draining (think noisy bath plug hole and you will get the idea) Quote Link to comment Share on other sites More sharing options...
need4speed Posted March 3, 2017 Share Posted March 3, 2017 I'm with Pete. Nothing beats a howling v8.. Nothing Quote Link to comment Share on other sites More sharing options...
neil110 Posted March 3, 2017 Share Posted March 3, 2017 (edited) Oh I can think of a couple engines that do Edited March 3, 2017 by neil110 Quote Link to comment Share on other sites More sharing options...
need4speed Posted March 3, 2017 Share Posted March 3, 2017 Nope. Not in my book. I've had twins, four's, fives, sixes and even a twelve! A singing straight 5 Audi Quattro is the only thing that comes close! 1 Quote Link to comment Share on other sites More sharing options...
neil110 Posted March 3, 2017 Share Posted March 3, 2017 2 engines, both British 1 petrol and 1 diesel. Both quite old and not especially exotic. The diesel, dependent upon your age and location, you may never have heard in operation. Quote Link to comment Share on other sites More sharing options...
Disco-Ron Posted March 3, 2017 Share Posted March 3, 2017 Go on neil..... try us! Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted March 3, 2017 Share Posted March 3, 2017 5 hours ago, need4speed said: Nope. Not in my book. I've had twins, four's, fives, sixes and even a twelve! A singing straight 5 Audi Quattro is the only thing that comes close! You realise my daily is a 91 Audi coupe Quattro with a 5 cylinder 20V engine No turbo either, to muffle the exhaust A V8 is lovely, but have to admit the Lexus LFA engine beats all. Quote Link to comment Share on other sites More sharing options...
need4speed Posted March 3, 2017 Share Posted March 3, 2017 Ooooh your Audi would take me back Pete! Disagree with the Lexus though. It's just too smooth and refined sounding if that makes sense? No gruffness.. Quote Link to comment Share on other sites More sharing options...
neil110 Posted March 4, 2017 Share Posted March 4, 2017 (edited) 15 hours ago, Disco-Ron said: Go on neil..... try us! The petrol one is reasonably obvious, the Rolls Royce Merlin. The diesel you really have to have been there to hear one working hard. The Napier Deltic: 18 cylinders 3 crankshafts, 36 pistons Edited March 4, 2017 by neil110 Quote Link to comment Share on other sites More sharing options...
Disco-Ron Posted March 4, 2017 Share Posted March 4, 2017 Agreed with the merlin..... in full flight they sound awesome. .. especially in a dog figgt style flight with the soubd coming and going under full power.... Whenever theres the chance to see one or more within reasonable distance I'm there.... in a flash! Quote Link to comment Share on other sites More sharing options...
neil110 Posted March 4, 2017 Share Posted March 4, 2017 (edited) Listen to the pass at 1.01 (oddly appropriate time) I was in UK last year when the Canadian Lancaster made a visit to the local airport, the pilot really had the throttles opened wide as he flew overhead. I was also working at RAF Leemimg when 11 sqn had their 75th anniversary. The BoB memorial flight did a 2 hour display and it was utterly utter in its wonderfulness Edited March 4, 2017 by neil110 Quote Link to comment Share on other sites More sharing options...
Disco-Ron Posted March 4, 2017 Share Posted March 4, 2017 Awesome..... gives me goosebumps! Quote Link to comment Share on other sites More sharing options...
need4speed Posted March 4, 2017 Share Posted March 4, 2017 Yeah agreed. But I was kinda meaning in cars lol Quote Link to comment Share on other sites More sharing options...
neil110 Posted March 4, 2017 Share Posted March 4, 2017 Strictly speaking the RR 27 litre V12 has been used in a vehicular application. The Centurion tank and a couple of people have put it into cars. But if you want a V12 in a car, how about this? Quote Link to comment Share on other sites More sharing options...
skauldy Posted March 17, 2017 Author Share Posted March 17, 2017 (edited) On 2/3/2017 at 6:58 AM, Disco-Ron said: 4.2 x 6000 rpm = 25200 cubic ltrs per minute. So convert that to cfm and there's your answer..... that assumes it'll rev to 6k! Roughly 890 cfm! Not that I doubted you Ron, but I was on the Donaldson website looking at filter housings. They had 2 formulas for finding the CFM. One was a simple one which was multiple Hp x 2.5 so done 190x 2.5 = 475 cfm then the other formula was more complicated accounting for volumetric efficent so gave it a VE of 2 as it is electronic and got 297 cfm, bloody hell Edited March 17, 2017 by skauldy Quote Link to comment Share on other sites More sharing options...
Disco-Ron Posted March 17, 2017 Share Posted March 17, 2017 So the one you had in mind could potentially supply enough air for almost 5 engines....lol. Quote Link to comment Share on other sites More sharing options...
skauldy Posted March 17, 2017 Author Share Posted March 17, 2017 Ha,think it was off one of those huge cat mining dumpers lol. confused now, the answers keep halving. The Land Rover wolf has a Donaldson filter fitted and it's good for 346 cfm, so I might go for the 475 answer Quote Link to comment Share on other sites More sharing options...
skauldy Posted March 17, 2017 Author Share Posted March 17, 2017 Oops scratch the 475 I done it wrong. Answer is 742 cfm taking into account volumetric efficiency, which is better as closer to your orginal answer. Quote Link to comment Share on other sites More sharing options...
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