edwardatherton Posted April 12, 2007 Share Posted April 12, 2007 I have just fitted a 2.5 petrol into the engine bay of the 88" S1, but don't know which ehxaust system I need... Standard Series 2.25, or Defender (and if so, what year)? Quote Link to comment Share on other sites More sharing options...
Les Henson Posted April 12, 2007 Share Posted April 12, 2007 The narrow bore of the original pipe would possibly restrict the power of the engine Edward. I fitted a 2.5 NAD and used the 109 system. S1 has an inky winky iccle straw for an exhaust doesn't it? Les. Quote Link to comment Share on other sites More sharing options...
Jon White Posted April 16, 2007 Share Posted April 16, 2007 Which exhaust manifold are you using - the 2.5 or the 2.25 one? Jon Quote Link to comment Share on other sites More sharing options...
edwardatherton Posted April 16, 2007 Author Share Posted April 16, 2007 The narrow bore of the original pipe would possibly restrict the power of the engine Edward. I fitted a 2.5 NAD and used the 109 system. S1 has an inky winky iccle straw for an exhaust doesn't it?Les. Due to my incredibly tight wallet, I wanted to use parts that are cheap, but also easily available. I have a new 2.25 Series exhaust system in the roof of the garage gathering dust, and a stainless front pipe as well. Someone I know is running a 2.25 exhaust on a 2.5 without problems. I had to buy a Def front pipe and chop off the first 6" so it would mate to the manifold (2.5 with twin-choke Weber). I then had it lengthened by 1.5" and all welded back up again. The middle and rear pipes are standard 2.25 type. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted April 16, 2007 Share Posted April 16, 2007 chop off the first 6" I then had it lengthened by 1.5" and all welded back up again. Erm, why didn't you just cut off 4 1/2" in the first place? Les Quote Link to comment Share on other sites More sharing options...
edwardatherton Posted April 17, 2007 Author Share Posted April 17, 2007 Erm, why didn't you just cut off 4 1/2" in the first place? Les Because I cut 6" off the vertical section at the manifold, and had the 1.5" inserted in the horizontal bit under the crossmember as the 2.5 manifold outlet is further forward... Quote Link to comment Share on other sites More sharing options...
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