Seedy Al Posted August 1, 2012 Share Posted August 1, 2012 Hey guys, so I'm just playing with some Ideas in my head for my Brown Crown Wanting to do something a bit different as I am no longer rolling with thm 3/4v setup in that. So am Going 2jz (bought the motor off spence ages ago) I was considering going 2jz turbo, but am think I dont need all that power in a 4 speed column change vehicle. So might run with NA Anyway, I wanna run ITB's on this piece. So i have a mild question. Vacuum. When the manifold is all made, I assume I should be running some sort of balance pipes between all the throttles, and was thinking i should be running these to a vacuum tank to try level and fluctuation in pressure etc.? and if so, what size connections would people think is enough for the balance pipes? And what size vacuum tank? Or Am I just asking stupid questions haha Quote Link to comment Share on other sites More sharing options...
KKtrips Posted August 1, 2012 Share Posted August 1, 2012 2JZ on triple 45's you say??? Quote Link to comment Share on other sites More sharing options...
ryanfels Posted August 1, 2012 Share Posted August 1, 2012 Ask this guy http://forum.jzx.co.nz/viewtopic.php?f=28&t=885 Quote Link to comment Share on other sites More sharing options...
Rookie Posted August 1, 2012 Share Posted August 1, 2012 Not silly Al, I have heard of people using 1/8 BSP fittings in each runner then hooking them up to a collector tank, I'm not too sure about the balance pipe in the manifold above. Quote Link to comment Share on other sites More sharing options...
phatt20 Posted August 1, 2012 Share Posted August 1, 2012 2JZ on triple 45's you say??? fuck yes Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted August 1, 2012 Author Share Posted August 1, 2012 Ask this guyhttp://forum.jzx.co.nz/viewtopic.php?f=28&t=885 Wow, that manifold is fucken easy. May consider doing it this way infact. looks like the port spacing is pretty close on the 20v throttles verse 2jz intake. but yeah, would rather tap into the runners undernethe and use fittings. Atleast that way it wont be ugly. Fuck seeing that manifold has made me very confident that this shouldnt be a total pain in the arse. Quote Link to comment Share on other sites More sharing options...
R100 Posted August 1, 2012 Share Posted August 1, 2012 I think spencer and Mikuni are the guys to talk to about this. I too wanted to go ITB's on my 2JZ my thread here > viewtopic.php?f=18&t=23625 Quote Link to comment Share on other sites More sharing options...
OldNathan Posted August 1, 2012 Share Posted August 1, 2012 Slight hijack sorry Al, but is there any examples of a 1j/2j on carbs? Cant find any. I think it would be insane. Imagine the sound! Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted August 1, 2012 Author Share Posted August 1, 2012 I have seen a few rb's on carbs Sound should be the same with throttle bodys anyway Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted August 1, 2012 Author Share Posted August 1, 2012 there is some good info in there thats for sure Will be running after market ECU anyway Should I expect any problems from doing this otherwise?? Quote Link to comment Share on other sites More sharing options...
Spencer Posted August 1, 2012 Share Posted August 1, 2012 What ECU are you using? Vacuum accumulators dont really help much, its all in the tuning to get it running sweet. You should use a blended Alpha-N (TPS)/speed density (map) setup to get it running best, hopefully the ECU you use does this well. You will only need a tiny port in each runner for vacuum, one big one in one runner for power brakes Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted August 2, 2012 Author Share Posted August 2, 2012 Link plus Quote Link to comment Share on other sites More sharing options...
Stu Posted August 2, 2012 Share Posted August 2, 2012 That'll run it sweet then Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted August 2, 2012 Author Share Posted August 2, 2012 Magic Might have to see if glenn is keen for a tuney tune. Quote Link to comment Share on other sites More sharing options...
Stu Posted August 2, 2012 Share Posted August 2, 2012 Glenns a fishing whore now - hit up KPR for sweet tune business, I'm sure I can convince him to travel down to do it Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted August 2, 2012 Author Share Posted August 2, 2012 Well, we always knew glenn was a fishing whore. Ok, well At this point I may just wait till i have the motor and throttles and shit mounted and go from there. So, you guys are saying a accumulator is a waste of time. Chur Quote Link to comment Share on other sites More sharing options...
mikuni Posted August 2, 2012 Share Posted August 2, 2012 So, you guys are saying a accumulator is a waste of time.Chur No, just that they don't help the problem much. You still need one to get a decent vacuum signal for MAP, which you will need to have it run super sweet as a road car.My old Chevette was running alpha-n only and was sweet for power at wide open throttle, but as you probably knew it ran a bit rich everywhere else and had a slight stutter when you blip the throttle. Tims managed to tune most of this out, I think still on alpha-n, but it would be supreme to get a decent vac accumulator and tune it with the MAP sensor connected, not to mention other things like cold start enrichment and some sort of idle control valve/actuator if you want to be real flash. Ok, well At this point I may just wait till i have the motor and throttles and shit mounted and go from there.Good idea. Quote Link to comment Share on other sites More sharing options...
toyabusa Posted August 2, 2012 Share Posted August 2, 2012 I used an accumulator and small fittings off each runner on my 4k that had 45mm itb's, using an old V5 Link, it ran sweet everywhere. Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted August 2, 2012 Author Share Posted August 2, 2012 Awesome awesome Also, thanks for asking the question about throttle linkages on the site you post ryan, that was a question I had stored up in my head haha Quote Link to comment Share on other sites More sharing options...
mark105 Posted August 2, 2012 Share Posted August 2, 2012 if i remember correctly Brad said his accumulator didnt do much at all to help with vacuum. I dont run one at all and in fact dont even have my MAP hooked up. Im just running straight Alpha-N and its happy as. I would suggest you T off 2 runners though for your brake booster if you are going to run one. As spence said you can tune it all out of it. I have managed to and we didnt really spend that much time doing it. I think we have only done about 4 tuning runs of about a couple of hours long. Quote Link to comment Share on other sites More sharing options...
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