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I have a blue over silver R33 GTS-31T - will have more mods on it by then - but would be more than happy to help out. I am in Brisbane as well.

yes - you go Thread Tools Show printable version

so how do you check the coil packs?

your kidding right arnt you??? it would definatly be possible.. if you really want some more torque try looking at geting an rb25 or 26 botom end and doing a rb23 or 24 Don't replace the heart of a stalion with the heart of a pony.

Sydneykid. I never thaught of it that way. I guess it was just a first idea that came to my head and set off the alarm bells. Given the oppertunity would you do it?

hmmm - plastic afm.... warm compressed air.... plastic afm.. warm compressed air... Dosn't sound like to good of a combination to me... Good luck with it though by all means!

im interested as well thanks

current best is 69,582 in a Mx5 Best in 240 Sx is 64,000 (cant rember others) best in GTR is 60,000 (and somthing)

Posted by roz85 on 19-11-2003 01:48 AM: ok. Not real sure, but i can remember fitting 3 fingers in exhaust housing. Which would mean, i can mearly machine the snout, fit the vtrim wheel and get the comp cover machined out. ________________________________________ Posted by BOOSTD on 19-11-2003 05:21 AM: Exhaust housing has been machined out to 53.5mm now which brings it right next to the flange. Also machined a slight bell mouth at the top for better flow. I will take some pics tonight. The comp cover is next, I will keep you up to date. matt ________________________________________ Posted by EnricoPalazzo on 19-11-2003 09:22 AM: Cool. So i thought u told me to keep the RB25 housing. Now u say VG30, or am i totally confused like usual. ________________________________________ Posted by rev210 on 19-11-2003 11:54 AM: BOOSTD, the exhaust housing on your VG30 turbo is the same as the R33 unit I have at home. 3 fingers fit into the housing and it looks the same size from the back. ________________________________________ Posted by rev210 on 19-11-2003 12:01 PM: the RB25det tirbo snout is 42mm standard also. ________________________________________ Posted by rev210 on 19-11-2003 12:05 PM: the RB25det turbo snout is 42mm standard also. ________________________________________ Posted by deano_33 on 19-11-2003 12:25 PM: This threads getting pretty popular... Just making sure, You get a standard r33 turbo, take the exhaust wheel off, take the exhaust housing off. Get a VG30 exhaust housing, machine out the bit which surrounds the exhaust wheel to 53mm diameter. Bolt the VG30 exhaust housing onto the R33 turbo, put the standard r33 exhaust wheel on. On the compressor side, you fit a T04 V trim comp wheel inside the standard r33 compressor housing [Does this need machining at all?]. This is your new hybrid turbo. This might be a stupid question, but how do the wheels attach to the shaft i.e. how do you change them? Then you bolt the bastard onto your car - manifold flange is same, bolts straight on, exhaust flange is same (to dump pipe), bolts straight on. Compressor side housing hasn't changed - all bolts up. You connect up the standard oil lines. You connect your boost controller. You already have FMIC, full exhaust, ECU so all you need is a tune and you're off fryin' the bags. Approx $350 for the turbo (a whole lot of time playing with it all) $100 for some dyno time...... Maybe $500 later and bulk more rwkw. Do you reckon to run 1 bar an AFC would be enough or do you need the timing adjustability of a proper aftermarket ECU? ________________________________________ Posted by deano_33 on 19-11-2003 12:29 PM: Hey what the? Does this mean you may not even need the VG30 exhaust housing, just machine out the standard housing? Save 50 bucks there! ________________________________________ Posted by rbs13 on 19-11-2003 01:18 PM: the vg exhaust housing is bigger.. . . . rb20det silvia ________________________________________ Posted by ed on 19-11-2003 01:39 PM: I wanna know who can machine and how much it would approximately cost . . . Skyline Cruise http://www.skylinesnsw.com/community/showt...=&threadid=4236 W.....TeamWestSide....W www.SkylinesNSW.com/community Now, the new tuning way is asking for response but not only stupid peak power at asmall rev range, this will let you get the driving pleasure on the wide rev range.

I Don't know if you guys want this or not... but I have a copy and paste (on my hdd) of all of the old post's from before it went down again.. here it is from when we lost it. Posted by BOOSTD on 18-11-2003 04:22 AM: Turbo is still running strong, been running 16-18psi with 266rwkw. Engine is currently having forged pistons fitted which gave me a chance for some pics. And keep you all up to date with my current mods. Ok pix will be up soon. ________________________________________ Posted by Squizz on 18-11-2003 05:23 AM: So for those of reading this and just nodding and smiling... We need the following. an R33 Turbo. the exhaust housing of a VG30BB turbo. a T04 compressor wheel. The exhaust housing is bored out and swapped with the R33 one but you still use the standard R33 exhaust wheel. The compressor wheel is swapped for the TO4 wheel and the compressor cover is machined to suit? Yeah? Or do I have this ass-backwards? And Megs give us the details of using RX7 parts champ... ________________________________________ Posted by BOOSTD on 18-11-2003 05:30 AM: perfect ________________________________________ Posted by Squizz on 18-11-2003 05:33 AM: Whew! Well the R33 turbo would be easy enough but where does one the exhaust housing off a BBVG30 (and don't say on the end of a BBVG30) and a TO4 wheel? ________________________________________ Posted by Squizz on 18-11-2003 05:38 AM: Also, could you start with a VG30 Turbo and just bore the exhaust housing and fit a T04 compressor wheel and mill the cover to suit? ________________________________________ Posted by BOOSTD on 18-11-2003 05:47 AM: yes comp covers are the same A/R for RB25 and VG30. Most VG30bb turbos r shagged now so the Housings are easily bought thru a local Turbo shop. don't pay more than $50. ________________________________________ Posted by Squizz on 18-11-2003 05:49 AM: Might have to wait til I move to Brisbane. In Rocky we have no "local turbo shop". If I wanted a 4BBL Carby and a Holley Blue I'd be set... ________________________________________ Posted by BOOSTD on 18-11-2003 06:08 AM: Adealide Turbo Services will have some. You can get it posted. ________________________________________ Posted by rbs13 on 18-11-2003 06:27 AM: and this would work on a rb20??????? . . . rb20det silvia ________________________________________ Posted by BOOSTD on 18-11-2003 06:31 AM: it will with more lag. ________________________________________ Posted by SeriesIIGTST on 18-11-2003 07:21 AM: I'm a little confused but not being mechanically minded that's not a difficult thing for me. From my understanding you're swapping the compressor wheel but not the exhaust wheel correct? Isn't the ceramic wheel of the stock turbo's what makes them weak? Why would you retain this then?? oh, and i take it the r33 turbo best not be shagged before you do this? Sorry for the dumb questions but that's the only way i learn the car technical stuff....in lamens terms . . . Where'd Cylinder 6 go ________________________________________ Posted by rev210 on 18-11-2003 07:53 AM: the ceramic wheel is only a weakness to the person who boosts the turbo beyond 1 bar. The chase is for 'power' and not to see how much boost you can stuff in a motor. Less boost is better. Boosting beyond 1 bar doesn't make enough power to be worth it. BOOSTD's turbo setup makes excellent power at only 0.8 bar. ________________________________________ Posted by SeriesIIGTST on 18-11-2003 07:59 AM: (Quote:) Originally posted by BOOSTD Turbo is still running strong, been running 16-18psi with 266rwkw. Thanks for the reply Dave but doesn't 16-18psi equate to more than 1 bar? Also, from what i'm reading is this turbo simply an R33 turbo with a VG30BB exhaust housing and a T04Vcompressor wheel? . . . Where'd Cylinder 6 go ________________________________________ Posted by DoughBoy on 18-11-2003 08:13 AM: SeriesIIGTST, maybe the airflow required for 16-18psi with this high flow requires lower shaft speeds than that of a conventional R33 turbo? If it did, then the ceramic wheel would be less prone to snapping off due to less heat/ slower speeds... ________________________________________ Posted by EnricoPalazzo on 18-11-2003 09:01 AM: Actually BOOSTD and i wer talkin about this one day and the main failure of the ceramic wheels is when they hit the housing of the turbo from spinning to fast, and hence weakening and falling off. BOOSTD has machined it so that the ceramic wheel cannot hit the sides hence become weaker, and the turbo should last. Like he said, hes been running the thing at highish boost for a while now, and he does give it alot of stick. Posted by SeriesIIGTST on 18-11-2003 09:16 AM: BOOSTD: While you;ve got your engine in pieces, any chance of getting some pics of your turbo up? Also, does adding the VG30BB exhaust housing require a new dump pipe to be made up too? . . . Where'd Cylinder 6 go ________________________________________ Posted by EnricoPalazzo on 18-11-2003 09:47 AM: No it all bolts on to stock manifold. ________________________________________ Posted by rbs13 on 18-11-2003 10:59 AM: so your still using the stock wheels.. just a differnt comp/exhuast housings... with machining.. . . . rb20det silvia ________________________________________ Posted by roz85 on 18-11-2003 11:07 AM: BOOSTD, what is the benefit in fitting the vg30 exhaust housing over the original rb25 housing? Reason i ask this, is i have the vQ30 turbo (sent you an email about it a while back) and recently had a custom dump made up for the unsual flange. Now what i want to know, can the huge gains still be had by changine to a t04 compressor housing a compressor wheel, and keeping the existing VQ30 exh housing? Cheers Anthony ________________________________________ Posted by EnricoPalazzo on 18-11-2003 01:29 PM: I think u can use either rb25 housing or vg30 can be uses aswell if wanted. ________________________________________ Posted by roz85 on 18-11-2003 02:35 PM: (Quote:) Originally posted by rbs13 so your still using the stock wheels.. just a differnt comp/exhuast housings... with machining.. Ok, see if i can get this right - BOOSTD please let me know if im correct. 1. All he is doing is machining the replacement (vg30) exh housing so that the snout is no longer the original 42mm, rather its 52mm. This (as already stated) will ensure that the exh wheel will not hit the exh housing at high speeds. The other reasons for maching the exh housing were given in the first post (to eliminate surge). 2. Then he replaces the standard compressor wheel with a t4 item, and has the standard compressor cover machined to fit the wheel. If this is correct, it seems simple enough for me! BOOSTD? out of curiosity, what other compressor wheels would be suitable, apart from the t04 v-trim? Anthony ________________________________________ Posted by rev210 on 18-11-2003 02:44 PM: compressor housing is T4 as well, original compressor housing thrown in the scrap bin. ________________________________________ Posted by roz85 on 18-11-2003 02:47 PM: really, what would i ask for when purchasing such a cover? i ask for a t04 vtrim compressor wheel & ........... ________________________________________ Posted by BOOSTD on 18-11-2003 11:28 PM: Rev210: Original comp cover is used. There are a combination of reasons why the VG30 A/R exhaust housing is better. Firstly the A/R of .81 reduces power robbing back pressure which causes a combination of problems. The V trim compressor has great flow for it`s relatively small size, however as a downside cannot make more that 15psi before ~4000RPM without surge. The VG30 exhaust housing will be machined(today actually) right to the flange edge to eliminate any chance of surge. A standard RB25 exhaust housing simply is to small( spool to early ) for the Vtrim wheel and will surge no matter what. roz85: spot on mate, There are other wheels which will fit but you will run into problems if you are chasing bigger flow as the .6 A/R comp cover will keep you in the surge zone of most comp maps. I looked at a 62-1 wheel (same as subzero's 10sec GTST) but would have to have a .7A/R comp cover to work. Hello lag to. This hybrid starts making boost pretty much straight away and goes from nothing to nuts in about 400rpm. Lag was alittle noticable without my adjustable cam gear. Then again I like no lag. Will be making a few final mods today as very slight surge was still occuring at high gears at low rpm. Lastest mods will be machining the exhaust snout right to the flange and machining a lip in the comp housing snout right above the primary comp blades. This is a technique used by nissan in the standard R33 turbos to eliminate surge. Also have a HKS wastegate on it's way from greenline ($155) as boost drops off at high rpm because of the standard wastegate actuator spring pressure. Aiming for 280rwkw at 19-20psi. Pic will be loaded today. ________________________________________ Posted by Robo's on 18-11-2003 11:37 PM: Your doing an excelent job. Im new to turbos and all these ratio things, but would love to build one up similar to you and experiment around. ________________________________________ Posted by BOOSTD on 18-11-2003 11:56 PM: Exhaust VG30= 3 fingers RB25= 2 fingers ________________________________________ Posted by BOOSTD on 19-11-2003 12:02 AM: comp Vtrim ________________________________________ Posted by BOOSTD on 19-11-2003 12:09 AM: exh .. ________________________________________

I'm lost.. originaly i thaught it was just get your r33 turbo take it to your turbo place and get a vg30 Exhaust housing put on there.. Get them to machine that out to 53.3mm - Through away the stock turbo housing. Next get a t04 V Trim compressor wheel and put that onto the stock turbo shaft. Bolt all back together and drive away. Is this correct? You said somthing about the to4 wheel needing to me modified now? What are places talking about breaking the exhaust wheel for? they are not touching that right? just the compressor wheel?

Hey -Joel- Can't access your new version of the rb30diy guide? somthing with yahoo? how much out are the runners? is it only a little? if its an easy job then go for it. why not have everything matching as much as posbile? surely it can't hurt. If its not and you plan on making even more power later on. Then I would say leave it for now and then get custom ones later on when you require it. If you do end up doing post pic's

will the hats still be available?

Small - Very Small same size as a S13 one

I currently have a R33 25T Skyline and am looking to do this conversion as well. Friend of mine is sending me up a rb30 short motor with the vvt oil outlet put in for me.. Also going to clean it up a little for me port the exhuast and intake ports a little. And move the Tensioner. From what I have read here I will be able to pull my motor out (with help from friends) and bolt on/hook up the rb30 bottom end to my Rb25DET top end. hook it all up - dial in some advance timing (25-27 degrees i belive i read that was what 25T is using) and drive away. happy boi as well as geting the gasket kits. From what I can tell the Rb25det injectors and oil pump will be fine with it all. Joel your how to guide is awsome. Congrats to you on the job well done. This is a extreamly helpfull thread!