kcambron Posted January 16, 2009 Share Posted January 16, 2009 I was wondering what the differences are(if any) in the 1980 thru 1983 turbo exaust manifolds? Thanks, Kevin Quote Link to comment Share on other sites More sharing options...
lifegrddude Posted January 16, 2009 Share Posted January 16, 2009 To the best of my knowledge the manifolds for 81-83 turbos are the same unless it's from a Euro spec model. Quote Link to comment Share on other sites More sharing options...
Vintage Posted January 21, 2009 Share Posted January 21, 2009 I recall seeing pictures of two US spec manifolds side by side that were different. Been a long time ago, but it seems like 240hoke posted the picture. Dont hold me to it, though. Edit: I believe the difference was one had the turbo flange more towards the middle of the manifold than the other. Quote Link to comment Share on other sites More sharing options...
Challenger Posted January 21, 2009 Share Posted January 21, 2009 This thread has been bothering me... for some reason Id like to say there is a difference, but cant find anything yet. Quote Link to comment Share on other sites More sharing options...
blue72 Posted January 21, 2009 Share Posted January 21, 2009 I've seen at least three different numbers cast into stock turbo exhaust manifolds; KN3, KN7 and WN4. The three piece European manifold I've seen reference to was listed as a KN2. I don't know what the number is for the turbo manifold from the L20ET. Whether there were any changes between different numbered U.S. spec manifolds I also don't know. I'll have one in my possession soon (and bore gauges) if you need any measurements to make comparisons. Quote Link to comment Share on other sites More sharing options...
Noddle Posted January 21, 2009 Share Posted January 21, 2009 here's a l20et one I believe, you will notice the turbo flange is more forward that a L28 on, and the outer 2 bolt holes don't have the end bits cut out. Nigel Quote Link to comment Share on other sites More sharing options...
kcambron Posted January 25, 2009 Author Share Posted January 25, 2009 One of the reasons for this question was to get more room for a 3" downpipe made with two 45's instead of two 90's. It also seems that if the outlet is located more towards the center of the manifold there should be more velocity directed to the turbo? Quote Link to comment Share on other sites More sharing options...
Noddle Posted January 26, 2009 Share Posted January 26, 2009 One of the reasons for this question was to get more room for a 3" downpipe made with two 45's instead of two 90's. It also seems that if the outlet is located more towards the center of the manifold there should be more velocity directed to the turbo? Maybe it to help with oil drainage with sumps with the pan at the front, ie early Skyline, I think I may have issues with drainage with my US spec turbo manifold and front sump on my car. see pic Quote Link to comment Share on other sites More sharing options...
blue72 Posted January 31, 2009 Share Posted January 31, 2009 From pictures, the US spec manifolds all look exactly the same on the outside. Updated list US manifolds I've seen pictures of: KN2, KN3, KN4, KN7 and what looks to be KN11. I was mistaken about the WN4, there is no such thing. I had misidentified a KN4. I just received my KN2 last week and here are some particulars in case anyone feels like making comparisons: Bare manifold weight = 17.1 lbs A = 25.8mm diagonally between bumps B = 23.1mm between bumps C = 38.5mm top to bottom Turbo flange inner diameter = 43.6mm x 57.2mm Quote Link to comment Share on other sites More sharing options...
Globerunner513 Posted January 31, 2009 Share Posted January 31, 2009 I have 2 turbo manifolds on the shelf...i'll take some measurements and pictures tomorrow. Quote Link to comment Share on other sites More sharing options...
Noddle Posted January 31, 2009 Share Posted January 31, 2009 Hi, Mines a KN1 1 all measurements are in mm A 24.93 B 22.23 C 39.27 Turbo flange inner diameter = 47.29 x 57.47 I had the calipers into the manifold as far as I could for A & B (smallest size) Nigel Quote Link to comment Share on other sites More sharing options...
blue72 Posted January 31, 2009 Share Posted January 31, 2009 Just so my measurements don't get too confusing, I did use my cheapie Chinese telescoping bore gauges to take my measurements. That'll account for some minor variation. Even still, just measuring w/ calipers my turbo flange was 43.1 x 56.9 making Noodle's turbo flange quite a bit larger. I also just tabulated the averages for overall port height and width right where the flange meets the cylinder head. Average Height: 38.3mm Average Width outer 4 ports: 37.5mm Average Width inner 2 ports: 39.1mm Quote Link to comment Share on other sites More sharing options...
Tony D Posted January 31, 2009 Share Posted January 31, 2009 There are two. I sent one to Calgary 280ZT and it was, of course, the 'wrong' one compared to what he had and had already exhaust plumbed the car for! The L20ET manifold I had was exactly the same outwardly as the 81 I took apart. But there is a 'forward' and 'rearward' location of the turbo---there are photos posted somewhere, that is true. And there is the Euro Manifold, which has 1 5/8" runners and a hole for the turbo that doesn't have a big bump restricting flow to the scroll. Quote Link to comment Share on other sites More sharing options...
blue72 Posted January 31, 2009 Share Posted January 31, 2009 I PM'd Xander a little while back and he was kind enough to give me a link to photos of the 3 piece euro manifold: http://www.angelfire.com/extreme/280zxt/page11.html Quote Link to comment Share on other sites More sharing options...
Kennysgreen280zt Posted January 31, 2009 Share Posted January 31, 2009 Ive had two different ones as well. Found out after selling one, then none of the parts lined up when installing the second one. No pics of course. I do remember having this converstation like a year to two ago Quote Link to comment Share on other sites More sharing options...
blue72 Posted January 31, 2009 Share Posted January 31, 2009 I do remember having this conversation like a year to two ago This one? http://forums.hybridz.org/showthread.php?t=118262 Quote Link to comment Share on other sites More sharing options...
Art Nadel Posted February 2, 2009 Share Posted February 2, 2009 Related question. Is it still every man for himself to fabricate 3 inch turbo down pipe for an S130 or does some vendor sell them? Art Quote Link to comment Share on other sites More sharing options...
ozconnection Posted February 14, 2009 Share Posted February 14, 2009 Here you are!! Quote Link to comment Share on other sites More sharing options...
Chemicalblue Posted February 14, 2009 Share Posted February 14, 2009 From the picture it seems like the bottom one raises the turbo location and moves it back 1.5" to 2 " directly in front of the runner. Is this accurate? Or am i seeing things again? Quote Link to comment Share on other sites More sharing options...
Globerunner513 Posted February 14, 2009 Share Posted February 14, 2009 what are the numbers on those manifolds? Quote Link to comment Share on other sites More sharing options...
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