wkdtime Posted January 24, 2005 Share Posted January 24, 2005 Hi all, As you know i am going to be getting an RZ S TT from japland! i would be very greatful if someone could let me know what would be in modding these beasts up! i was told once u decta both pipes u can hit 1.2 bar which is too much boost as the car wont fuel for more than 1bar...i think! so what is the best thing to do? maybe one decat, bigger exhaust, induction cut, fcd? if so what bhp would i be looking at the flywheel...approx! and would i need a boost controller to maintain the boost at a safe level, or will the level attaied with the above mods be safe for the car? thanks guys! regards amz Quote Link to comment Share on other sites More sharing options...
baojun Posted January 24, 2005 Share Posted January 24, 2005 boost controller = FCD needed. Quote Link to comment Share on other sites More sharing options...
Adam Kindness Posted January 24, 2005 Share Posted January 24, 2005 remove both cats, fit a CW restrictor ring for 1.0/1.1bar.... Get.... colder grade plugs FCD Walbro pump Boost controller That will see you run 1.2 safely... (max the ceramic turbo's will take...... or there abouts! every car is different) Quote Link to comment Share on other sites More sharing options...
terribleturner Posted January 24, 2005 Share Posted January 24, 2005 Welcome Amz, where abouts in Middlesex are you from?? It all depends on your budget as to what to get first etc or if you can get it all at once. The exhaust and FCD/VFCC are a great start, but then you'll find you'll want a decat (and because it's a J-Spec you'll need a restrictor ring), and with this you'll need colder plugs. It'll snow ball quite quickly you will find. A boost gauge is probably one of the most important and first thing you should get installed. It's great having all the power, but it's also great knowing that your not pushing the engine further than it can take. Quote Link to comment Share on other sites More sharing options...
tbourner Posted January 24, 2005 Share Posted January 24, 2005 Yeah definitely a boost gauge first, you can get them quite cheap if you don't want the best, not sure on the accuracy of my cheap one though tbh. Then I'd suggest work from the other way round - get Walro fuel pump and some cheap plugs (NGK BCPR7ES are OK), then get a catback exhaust (NUR is recommended on here I believe), and then finaly a full decat with restrictor ring. You'll then probably want to go on a dyno for an hour to check it all out, which might mean you'll need an EManage or similar - but probably not. TBH you won't need a boost controller on a j-spec if money is tight, if it's not then just hand it over to Dude and ask for a T67 and all the gumph!! Quote Link to comment Share on other sites More sharing options...
Adam Kindness Posted January 24, 2005 Share Posted January 24, 2005 ps..... mine weren't in any order.... I've started to buy my 'crap' now..... still waiting for the car But with hindsight.... make damn sure you can fuel the boost you are running, and beware of boost spikes. I'd rather restrict the boost and raise it by using a controller than running a spikey 1.2 to 1.3+ bar with no means of reducing it. My 1st supra melted 2 pistons doing this..... and i wasted even pushing it when it happened I then went hybrid with uprated fueling etc and restricted the boost to 1.0bar (when controller was off) But yeah.... upgrade the fueling and plugs first, then FCD, then bin the cats Quote Link to comment Share on other sites More sharing options...
Steve W2 Posted January 24, 2005 Share Posted January 24, 2005 Hello and welcome. Another good point to strat is the FAQ section in this board. You will find heaps of information on this there. You can also use the search facility to help you find stuff that's not in the FAQ. EVERYTHING will have been asked, and answered before! Quote Link to comment Share on other sites More sharing options...
The Hornet Posted January 24, 2005 Share Posted January 24, 2005 Hi and Welcome, you can see the mod's I've had done (signature) over the last 6 months which basically got me up and running at a decent level quickly. To go up further I will be getting: Uprated fuel pump, 650cc injectors and a SAFC, EGT guage, E-manage plus Dyno'd. (When my budget allows of course) After this I would / will be going for "Hybrids" *That sounds about right yeah...* Hornet PS. If you have better suggestions please post as I'm open for ideas Quote Link to comment Share on other sites More sharing options...
terribleturner Posted January 24, 2005 Share Posted January 24, 2005 Slight highjack My mods are listed in my sig (BPU), but i don't have an uprated fuel pump on my J-Spec. Do you think this is odd??. Sorry, highjack over Quote Link to comment Share on other sites More sharing options...
hadyn Posted January 24, 2005 Share Posted January 24, 2005 i've just bought mine and once i know everythings running sweet and sound i'll be getting some very mild mods to start off with: uprated panel filter circular earth grounding kit iridium plugs clear repeaters once thats in next stage will be decat, fcd, boost controller and uprated walbro pump to make sure enough fuels going in:) Quote Link to comment Share on other sites More sharing options...
Jake Posted January 24, 2005 Share Posted January 24, 2005 (BPU), but i don't have an uprated fuel pump on my J-Spec. Do you think this is odd?Odd? No. Risky? Maybe. Since fitting all the BPU stuff you've had the fueling checked on a dyno and it was OK at the time, right? It would be prudent to replace the ageing OE pump with a new one of higher spec. Quote Link to comment Share on other sites More sharing options...
terribleturner Posted January 24, 2005 Share Posted January 24, 2005 Odd? No. Risky? Maybe. Since fitting all the BPU stuff you've had the fueling checked on a dyno and it was OK at the time, right? Ah oh! Keep meaning to get it on the dyno but havn't got round to it yet. Guess i should maybe get that done asap. (Gets coat and runs out door) I've only really had this set up fo just over a month now and if anyhing i've noticed that im getting slightly better fuel consumption. What sort of damge etc... could i be doing?? Scared now Quote Link to comment Share on other sites More sharing options...
The Hornet Posted January 24, 2005 Share Posted January 24, 2005 I'm in same situation too sorry... Hornet Quote Link to comment Share on other sites More sharing options...
tbourner Posted January 24, 2005 Share Posted January 24, 2005 Might be running lean on an OEM jap fuel pump. Especially at high boost where the ECU doesn't know what fuelling to use anyway!! I've got a Walbro and still running a bit lean at 4500 ish revs. So it's EManage for me next. Quote Link to comment Share on other sites More sharing options...
adi2009 Posted January 24, 2005 Share Posted January 24, 2005 what are these CW restrictor rings and where can i get one from. thanks adi Quote Link to comment Share on other sites More sharing options...
hadyn Posted January 24, 2005 Share Posted January 24, 2005 do stock fuel pumps last forever???dont they ever die?? Quote Link to comment Share on other sites More sharing options...
merckx Posted January 24, 2005 Share Posted January 24, 2005 what are these CW restrictor rings and where can i get one from. thanks adi On the Jap spec car when you fit a big bore exhaust and remove the cats the boost level can get too high! A restrictor ring is basically a plate that fits between the flanges on the exhaust system, it's aperture is smaller than the exhaust bore so this will reduce the boost . In most cases it will limit it to 1.2 bar - the max pressure that most people run on stock turbo's. CW = Chris Wilson, he's a member on here and can supply and fit many parts for the Supra. Chris Wilson. Race and performance road car servicing and preparation in north Shropshire. Home / Work : 01948-841581 Mobile: 07971-952084 Please use direct e-mail, rather than PM's, thanks! [email protected] Quote Link to comment Share on other sites More sharing options...
FaithStalker Posted January 24, 2005 Share Posted January 24, 2005 and after you do all the above, dont forget to run on Optimax! Quote Link to comment Share on other sites More sharing options...
wkdtime Posted January 24, 2005 Author Share Posted January 24, 2005 cheers for the help guys, one thing im not clear on is, what is the E manage, is it a new ECU or does it simply piggy back on to my current ecu... just to recap, fcd, de-cats, bigger fuel pump, gauge, plugs, what about the injectors would i need to change them as well? Quote Link to comment Share on other sites More sharing options...
Jake Posted January 24, 2005 Share Posted January 24, 2005 The GReddy eManage is a piggyback for the existing ECU. It's primary purpose is for controlling oversized injectors but it can do a whole lot more as well. You won't usually need to change the injectors for BPU although they are just about maxed out at this point. Once/if you start going for bigger turbos you'll certainly need bigger injectors. Quote Link to comment Share on other sites More sharing options...
Adam Kindness Posted January 25, 2005 Share Posted January 25, 2005 i was running standard injectors at 1.4bar.... with fueling spot on all the way through the revs walbro + pressure reg running Stage3 JPS hybrids Quote Link to comment Share on other sites More sharing options...
Steve W2 Posted January 25, 2005 Share Posted January 25, 2005 For whoever asked, running lean = melted pistons! Quote Link to comment Share on other sites More sharing options...
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