Tequilawormz31 Posted July 12, 2011 Share Posted July 12, 2011 I have been searching for awhile going through others build threads and random mod topics trying to find a good write up. Anyone know of a good write up here. Specfically I am going RB26 in a Z31 and am looking at everything I need to go single throttle body with perferably Q45 TB. Thanks Quote Link to comment Share on other sites More sharing options...
Neverdone Posted July 12, 2011 Share Posted July 12, 2011 Not to question your motives, but what benefit do you get out of using a single throttle body? Most people swap from a single to ITB's. Quote Link to comment Share on other sites More sharing options...
jakeoster Posted July 15, 2011 Share Posted July 15, 2011 Not to question your motives, but what benefit do you get out of using a single throttle body? Most people swap from a single to ITB's. Flows better for very high horsepower applications. Quote Link to comment Share on other sites More sharing options...
Tequilawormz31 Posted July 16, 2011 Author Share Posted July 16, 2011 For me it is actually a combination of things. Easier IC piping fabrication, don't have to sync the ITBs and allows for additional clearance between intake manifold and the passenger side frame rail/body. Specifically I am curious as what TB flange people have used, which TB, and how they adapt TPS to accomadate lengthened wiring (if needed and possible opposite rotation. Quote Link to comment Share on other sites More sharing options...
jakeoster Posted July 16, 2011 Share Posted July 16, 2011 So you want to get a flange and weld it onto the RB26 plenum...? I don't think I've ever heard of anyone doing this out of convinence before. Most people that go single go with a Jun style plenum or whatever. Quote Link to comment Share on other sites More sharing options...
Tequilawormz31 Posted July 17, 2011 Author Share Posted July 17, 2011 Looking at flow number for a couple common aftermarket plenums, you really don't get much more than a shiny plenum unless you are going above $1000 for the plenum. the stock plenum has a decent capacity and decent flow. I am not going to be hitting numbers that would justify spending that kind of money on just a plenum. Plus the same questions I have would be the same as for someone who is making their own manifold. Also, what throttle cable are people using for single throttle body LHD cars? Quote Link to comment Share on other sites More sharing options...
jakeoster Posted July 19, 2011 Share Posted July 19, 2011 Sorry, I don't really get what your trying to accomplish. Seems like you'd just create new problems trying to go with a single TB... Quote Link to comment Share on other sites More sharing options...
SENZA PARI Posted July 19, 2011 Share Posted July 19, 2011 It can be done, however I believe the mouth of the stock RB manifold is quite a bit smaller than the ID of a Q45, how much exactly I'm unsure... I just know that you'd almost have to use a reducer on the Q45 TB flange to get back to the stock manifold size. The Q45 works well, and many use it. It'll flow enough for most power goals. If you're not shooting for 600+ you may consider using a smaller SR TB. This would mate with the stock manifold much easier, and should still flow plenty. We've used Lokar throttle cables for this sort of application in the past with good success. Below is a custom manifold we do for the RB series. This one is for a 25... IMG_0633 by SENZA PARI, on Flickr Quote Link to comment Share on other sites More sharing options...
fast-datsun Posted July 19, 2011 Share Posted July 19, 2011 What is your goal a drag race car??? street... conversion to single TB is usally for really big HP. if you goal is 700/800 range or less stay with the stock set-up. Q45 or aftermarket of same size is usually the choice.. Quote Link to comment Share on other sites More sharing options...
wax Posted October 14, 2011 Share Posted October 14, 2011 Alot of drag cars making in excess of 900 hp at the wheels use the stock throttle bodies so im not sure if this will be an issue at all Quote Link to comment Share on other sites More sharing options...
David GArcia Posted October 14, 2011 Share Posted October 14, 2011 (edited) If you want to retain the stock manifold and weld a falnge to it why not get a q45 flange to rb25det flange adapter. Cut the rb25det flange off the adapter or vise versa. That allows you to use either a q45 throttle body or a rb25det trottle body. just an idea. Also i second the lokar kit. I bought the 48 inch kit and cut it to length. It can be bought online at either the jegs or summit racing website. I made my own bracker out of alluminum bought from home depot. I used stock mounting holes for the bracket that are to the right of the hoop pin socket. Edited October 14, 2011 by David GArcia Quote Link to comment Share on other sites More sharing options...
ZT-R Posted October 16, 2011 Share Posted October 16, 2011 Are you running an EMS? if so i would look at the wilson TB. I think raw brokerage sells them. The nissan TPS is a POS. I have been though 4 already and the wilson lets you use the ford/gm tps (dime a dozen and in stock everywhere). There is a company that makes just the weld flange, it might be greddy, I cant remember. Quote Link to comment Share on other sites More sharing options...
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