Richard. W. Posted May 12, 2009 Share Posted May 12, 2009 Hi all. I have a spare OS 40 FP, and a spare Irvine 40 (Old type, metalic finish, not red). I want to fit one of them into an own design sport model i'm building, but can't decide which will be the better option. True, OS gets all the hype etc, but the Irvine motors are reliable, smooth running motors with a great idle and loads of torque. I don't want to have to change the motor once it's in as that would be a pig of a job (Own design fault ) any advise on which one to fit anyone? It's a sidewinder instalation if that helps. Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted May 13, 2009 Share Posted May 13, 2009 Toss a coin Quote Link to comment Share on other sites More sharing options...
001 Posted May 13, 2009 Share Posted May 13, 2009 I would say, weigh them accurately. If your plane has a short nose and needs the weight, use the heavier engine. Quote Link to comment Share on other sites More sharing options...
Phil Claridge Posted May 13, 2009 Share Posted May 13, 2009 irvine, had both prefer irvine Quote Link to comment Share on other sites More sharing options...
IanN Posted May 13, 2009 Share Posted May 13, 2009 "the Irvine motors are reliable, smooth running motors with a great idle and loads of torque." What else could you possibly want? I think you've answered your own question Edited By IanN on 13/05/2009 23:18:10 Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted May 14, 2009 Share Posted May 14, 2009 hello old man shrek----fit the os--tune it and forget it--irvine is ok-but choice i would say fit the os anytime............... ken anderson...................... Quote Link to comment Share on other sites More sharing options...
Dave Bran Posted May 14, 2009 Share Posted May 14, 2009 Re: "I don't want to have to change the motor once it's in" Go Electric then..................................... Quote Link to comment Share on other sites More sharing options...
Terry Whiting Posted May 15, 2009 Share Posted May 15, 2009 If I had to choose it would be the Irvine, OS are not silly, there was something special in the Irvine, thats why OS bought Irvine out and and producing them theirselves. Quote Link to comment Share on other sites More sharing options...
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