Chris Wilson Posted April 18, 2012 Share Posted April 18, 2012 Unused, boxed genuine Tial 40 mm wastegate. Offers invited. Colour black. Reply only by e-mail please. No PM's, or ring me with a voice call on 07971-952084 Thanks. Link to comment Share on other sites More sharing options...
little num Posted April 18, 2012 Share Posted April 18, 2012 I put a wanted for a wastegate about aweek ago, bought a Precision 46m now. Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 18, 2012 Author Share Posted April 18, 2012 That's very big, won't it cause erratic boost control? Have you got an enormous turbo on it now? Link to comment Share on other sites More sharing options...
little num Posted April 18, 2012 Share Posted April 18, 2012 Well i wouldnt say enormous but its a decent size, i read that having a wg to small can cause problems but a large 1 dont make any difference at all. I havent installed all the bits yet so not sure if it all works ok. I have fitted the springs in to allow it to open at 0.7 for now as im unsure what power it will make even at that. Link to comment Share on other sites More sharing options...
dive_popo Posted April 19, 2012 Share Posted April 19, 2012 How much you are after for this ? Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 19, 2012 Author Share Posted April 19, 2012 As the ad says, I am open to sensible offers. Not sure what current retail is, I think they are about £380. Link to comment Share on other sites More sharing options...
dude Posted April 19, 2012 Share Posted April 19, 2012 Well i wouldnt say enormous but its a decent size, i read that having a wg to small can cause problems but a large 1 dont make any difference at all. I havent installed all the bits yet so not sure if it all works ok. I have fitted the springs in to allow it to open at 0.7 for now as im unsure what power it will make even at that. Bigger the turbo and more boost you want to run the smaller the WG can be !!! Bigger WG's do struggle on small turbos in my experience, small twins is the way to go . Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 19, 2012 Author Share Posted April 19, 2012 Yes, a big gate on a medium or small turbo makes it very hard to achieve linear and smooth boost control. Even opened a crack a big gate will flow a lot of exhaust gas, so the turbo instantly loses a lot of boost, then it closes, so you can get surge or spikes. I did have a Garrett technical paper on turbo wastegate sizing, but it's on a remote drive I have lent someone. Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 19, 2012 Author Share Posted April 19, 2012 There are some photos of it here, it is brand new, and has just been lain on an engine of mine I built to measure up for clearances. The milled adaptor is NOT with it!!!! Apart from the photo in an early post the build photos in the link in post # 1 show more detailed ones. http://www.gtr.co.uk/forum/128775-quick-rb25det-engine-build.html Link to comment Share on other sites More sharing options...
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