kolonelklink87 Posted November 16, 2011 Share Posted November 16, 2011 (edited) Hi all, I thought it'd post of some pictures of my "homemade" itb install. It was an idea my brother and i had some time ago about using gtr throttle bodies on a converted mikuni/weber manifold. The thought being i'm too young for carburetors, love efi and am too poor for extrudeabody prices. all up the setup cost ~$500 in parts and machining but requires alot of labour, planning and generous machining time. it has come together nicely me thinks and i thought i'd share some install photos its been ages since i posted here! i hope everyone is still having fun. -pete Edited November 17, 2011 by kolonelklink87 1 Quote Link to comment Share on other sites More sharing options...
lowrider Posted November 16, 2011 Share Posted November 16, 2011 For some reason of another, I can't see the pictures. Quote Link to comment Share on other sites More sharing options...
rbrick220 Posted November 16, 2011 Share Posted November 16, 2011 I was just researching if this could be done, and how to do it! Can't wait for details!!!! BTW: I can't see the pics either Quote Link to comment Share on other sites More sharing options...
kolonelklink87 Posted November 17, 2011 Author Share Posted November 17, 2011 I was just researching if this could be done, and how to do it! Can't wait for details!!!! BTW: I can't see the pics either Pics should work. FYI. I don't think it can be done neatly without a fair amount of machining. I've seen it done before but very messily and injector mounting is a bit of bother - custom fuel rail etc was required. -pete Quote Link to comment Share on other sites More sharing options...
19762802+2 Posted November 17, 2011 Share Posted November 17, 2011 Another option is to go with the 1fastZ route and use 92 Maxima throttle bodies, A 280z/280zx intake manifold cut down with new runners welded on and the Throttle bodies attached. This way you already have injector mounts and less machine work to do. I like your design as well, It looks very nice. Let us know how they sound and perform. Perhaps a Video? Quote Link to comment Share on other sites More sharing options...
v8dats Posted November 17, 2011 Share Posted November 17, 2011 very nice! Quote Link to comment Share on other sites More sharing options...
jdizzy204 Posted November 17, 2011 Share Posted November 17, 2011 what diameter are gtr itbs? Quote Link to comment Share on other sites More sharing options...
ArchetypeDatsun Posted November 17, 2011 Share Posted November 17, 2011 Thanks for sharing, looks great! Quote Link to comment Share on other sites More sharing options...
kolonelklink87 Posted November 18, 2011 Author Share Posted November 18, 2011 have this running... i'll try and get a video soonish... GTR itb's are 45mm. The induction noise is angry -pete Quote Link to comment Share on other sites More sharing options...
rbrick220 Posted November 18, 2011 Share Posted November 18, 2011 Another option is to go with the 1fastZ route and use 92 Maxima throttle bodies, A 280z/280zx intake manifold cut down with new runners welded on and the Throttle bodies attached. This way you already have injector mounts and less machine work to do. Did he do that for ITB or just as a single tb upgrade? Also, sorry in advance if this is a dumb question, but why is there an intake port left open? That doesn't seem right to me. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted November 18, 2011 Share Posted November 18, 2011 Did he do that for ITB or just as a single tb upgrade? Also, sorry in advance if this is a dumb question, but why is there an intake port left open? That doesn't seem right to me. That's not an intake, that's the coolant port. Quote Link to comment Share on other sites More sharing options...
kolonelklink87 Posted November 18, 2011 Author Share Posted November 18, 2011 That's not an intake, that's the coolant port. alas... it's true: this is not one of the fabled 3.3litre seven cylinder L-series engines Quote Link to comment Share on other sites More sharing options...
ZIPPY Posted November 19, 2011 Share Posted November 19, 2011 Very nice.. Me likes! I'd love to see some close up's of the linkage. Is the center to center of the itb's the same as the manifold? Quote Link to comment Share on other sites More sharing options...
19762802+2 Posted November 19, 2011 Share Posted November 19, 2011 Did he do that for ITB or just as a single tb upgrade? Also, sorry in advance if this is a dumb question, but why is there an intake port left open? That doesn't seem right to me. The maxima has two throttle plates in the throttle body when you use three maxima throttle bodies you get six individual throttle plates. There are videos of his car and pictures too. Quote Link to comment Share on other sites More sharing options...
kolonelklink87 Posted November 24, 2011 Author Share Posted November 24, 2011 Some crappy iphone photos as teaser ...and a teaser video thanks to my housemate I'm still doing alot of tuning on this setup but its coming along nicely. -pete Quote Link to comment Share on other sites More sharing options...
ozconnection Posted November 24, 2011 Share Posted November 24, 2011 Some crappy iphone photos as teaser ...and a teaser video thanks to my housemate I'm still doing alot of tuning on this setup but its coming along nicely. -pete What else can I say....... Quote Link to comment Share on other sites More sharing options...
rossman Posted November 24, 2011 Share Posted November 24, 2011 Very nice! Quote Link to comment Share on other sites More sharing options...
Kali Posted November 24, 2011 Share Posted November 24, 2011 Wow, ive heard people talk about this but they just go the easy route and pay the 2K+ Im trying to do a similiar build with my engine though im going with a L31ET. If you could please send you blueprints and parts list you could seriously help. Quote Link to comment Share on other sites More sharing options...
Kali Posted November 24, 2011 Share Posted November 24, 2011 After looking more in depth into your pics I understand the spacers and mounting for the fuel rail. Can't really figure out the linkage for the throttle bar though. If you could go more into that? Quote Link to comment Share on other sites More sharing options...
kolonelklink87 Posted November 25, 2011 Author Share Posted November 25, 2011 After looking more in depth into your pics I understand the spacers and mounting for the fuel rail. Can't really figure out the linkage for the throttle bar though. If you could go more into that? I can't go into full details as the design is a collaboration. But basically the throttles are yoked together using a purpose built endplate and linkage. The throttle cable is on the firewall (see me grabbing it in the video). There are multiple approaches to the throttle issue, all of them requiring some fabrication. I chose this option not because it was technically the best but it was definitely the cleanest. EFI is meant to be clean without springs and linkages going everywhere like on carbs so it kept it simple accordingly. -pete Quote Link to comment Share on other sites More sharing options...
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