GTRNUR

I like it! How many do you have? or are you making them and selling them? I was thinking of making one myself that would be mappable, simular to how you can get a silicon chip kit that allows you to fool a stock ecu into working with larger mafs and injectors. A controller with RPM and boost inputs that could then provide additional offset to provide more front torque accordingly... It mentions that you can only run 2wd mode on the R32 GTR's. Would that also cover R32 GTS4's with a manual GTR gearbox conversion? Anyway, Im interested in knowing more. Cheers, Ian

No I can't get pics of the inside. I will take some personally when the first shipment arrives. Yes the total intake runner lenght is less with these plenums so in theory you loose some off boost torque, but it makes no diference when they are on boost. The intate runners do have trumpets on top of them. No dyno info at this stage, but i'm planning on doing a before and after 16lb run on my car when I get one for it, so i'll post info then. Frankly i'm not putting it on to improve performance. I just hate the stock plenum and the cross over pipe you have to run if you have a frount mount IC. I'm on holidays in darwin at the moment but i'm still in email contact. I'll be trying to keep people informed. When i'm back home monday week i'll be placing the order shortly there after making contact with everyone, confirming details again etc. Its still some public holiday in Taiwan as well so they aren't replying to email till the 23rd. Cheers, Ian Swinkels.

Hi Everyone, Here is another picture of the RB20 plenum from a diferent angle. The supplier sent me a bunch more pictures but this was the only one worth looking at. When I ask for pictures of inside the plenum I think things are getting lost on translation... They have 3 vacuum connections and also a connection for the brake booster. I can't tell if there is a place for the idle control valve at this stage yet. And again due to language lost in translation I can't get a clear response from the supplier... :S Worst case is that a small flange would need to be welded onto each plenum. On the bright side of this, you can put it anywhere you want, so you can mount it under the plenum so its not visable. Also, the group buy is being extended until the 19th (2 days extra) due to a 1 week holiday that everyone seems to be taking in taiwan. There has been a fair amount of interest in the group buy, enough that it will definatly be going ahead. The lack of RB25 plenums is an issue, but i'm still investigating a work around and possibly importing the plenums allowing you to get them welded and match ported locally. I'll be in touch with all people that made an enquiry in 5-7 days prior to placing the order on the 19th. Cheers, Ian Swinkels.

Put me down for first dibs on them! I'll call you tomorrow to give you an address and work out what freight would cost. Cheers, Ian.

Dam thats not good at all! With the throttle body did you try starting the car and jaming a rag in the intake (or covering it with your hand) to eliminate the possaibility of a vacuum leak elsewhere? I've been told by the suppliers that they have a ball bearing supported shaft that is sealed? Did you get yours from japaneseperformanceparts in NZ?

Well the wolf uses a setting called Transient Delcel Enleanment. It does the reverse of a throttle pump and reduces fuel delivered to the engine during deceleration. Eg... SUppose you are cruising at 100k's and start to go down a slight incline, you remove your foot slightly from the accelerator to maintain the same road speed. The wolf will reduce fuel delivery a pre-set amount for a preset limit, exactly the same as a carburators throttle pump would add fuel during acceleration, but reverse. This keeps reduces un-necessary overfueling while the ecu settles on a new RPM/MAP sensor position on the fuel map. Remember the reason for transient enrichment in a carburator is to deliver extra fuel to stop hesitation during sudden throttle position changes, while map or maf sensors settle on a new load setting. Transient ENLEANMENT does the opposite to concerve fuel. I also use Over run fuel cut, which is meant for when your rolling down a hill and take your foot off the accelerator. Above 1600 RPM and at 0 throttle the ecu stops all fuel delivery and lets the engine naturally reduce engine speed. Its also used between gear shifts. You turn both these off if you want to maintain boost better between gear shifts and are racing or something. Hope that helps... Cheers, Ian.

Proven... not by me. But i'm sure someone out there is using them. They are the same as the ones sold at ... http://www.japaneseperformanceparts.com I'll be buying from their wholesaler... PROBLEM.... RB25 intake runners are in tight demand... and as a result they can't supply RB25 plenums unless I ship them intake runners first. I'll be seeing if I can cut a deal with a some of the importers to get a heap of them for the right price. I'll update you all with my progress, but for the moment i'll have to say RB25 plenums aren't available at present. CHeers, Ian

Well I went for a long drive today. Did 230km's and used 1/2 a tank of fuel. Now I was driving normally for about 80% of the drive, I did some overtaking and saw 160-170k a few times... and the first 1/6 of the drive was actually a hill climb up a local range where I just couldn't help myself playing chase with someone in an evo 4 and occasionally hit around 5500 rpm at 16lb. Incidently this is about 10-11ms pulse width on the injectors. I also sat on about 120k's for 3/4 of the trip home. Relivent details for the engine are.... RB20DET 100% internall stock, GT25 BB 400, 0.64 compressor, 0.7 turbine, Wolf ecu, front mount IC. My GTS4 has a manual gtr gearbox too, not the auto. Here's my current map settings approx...As a lot of you use MAF instead if MAP sensors i'll translate to PSI and you can all work it out from that... Below 2000 RPM... 0 PSI - 14.2 -5 in-hg - 14.0 -10in-gh - 13.8:1 (going slightly rich here really helped make the throttle response snappy. -18in-hg 14.2 to 13.8 depending if aircon is on at idle, and about 14.0 when cruising. Above 2000 RPM 2psi - 14.2:1 0psi - 14.7:1 -5in-hg - 15:1 -10in-gh - 15.5:1 -15in-hg - 16:1 -20in-hg - 0:1 (0ms fuel value) Ignition advance was at 36 degrees. at 0 psi and increases to a max of 38 or 42 under vacuum. I can't remember exactly how far it advances. I am also using decceleration En-leanment. The reverse of a throttle pump setting to lean things during negative throttle movements, which is one of the advances settings for economy tuning the wolf. Closed loop operation was disabled for the whole drive. The resutls... All in 5th gear. Peak cruise power was found to be at about -5hg on the boost gauge at 100-105k's in 5th gear on level ground. The injector pulse width maxed out at about 2.40ms to 2.45ms. This was while at a 15.5:1 AFR. Increasing speed to 110k's increased the fuel requirement to about 2.6ms and the resulting change to 14.7:1 AFR at 0 PSI. Finally at 120k's the fuel requirement increased further to 2.8ms and again maintained around 14.7:1 AFR at 0 PSI. So, I think with this tune if I were able to keep my right foot under control (or install a throttle stop) I could possibly see 500k's with this tune. I'll post the actual map up tomorrow. I'll have to also see how things go this next week with driving around town economy. Results will be posted. Cheers, Ian

Yes Kyle, the plenums use the standard intake runners but are cut off and have plenums attached. Each plenum runner has a trumpet at the top and are match ported to the runners after welding. Because it uses a factory manifold its a guaranteed direct bolt on affair, with the exception fo having to re-run your vacuum hoses and relocate the throttle, and intercooler plumbing. 33SOM... Adapters for the standard throttle body? You mean a plenum for the standard throttle body? If thats the case then yes the plenums are available with throttle body flanges for throttles from stock to 100mm in all type of engines. 80mm is definatly the best way to go for all round tunability and room for 500hp easy. Stock R32/R33 ones become a restriction around the 280-300 mark although you can still push a lot more thru them there is power to be had by increasing the size of the TB. Sub Zero have moved and renamed their operation to Ferral performance... They still make plenums for around the $1000-1200 mark too depending on what your chasing.

Sorry should have posted back on this... Problem solved... It turned out to be the clutch. I bought a whole compressor off ebay for $150, and after much bitching and moaning managed to replace the clutch without removing the compressor from the car. Over an hour on one circlip! But after a re-gas it all started working fine. 10 Amp fuse and she's fine. I was told by the aircon guy that this can be a common thing... Don't know nor care about it now tho cause i'm chillin' out in my skyline now!

Sorry I should have provided a little more info so here's it all.... The car runs a wolf 4 plus with MSD DIS4, 3 coil waste spark, 044 pump, 460cc injectors, stock plenum, front mount IC, high mount manifold, GT28 BB 400 with a 0.64 turbine an d 0.7 compressor. The car is a GTS4 with GTR manual gearbox. Diffs are stock i believe. I do all my own tuning. Yes running rich makes for the worst emmissions as "NFI" said, but a catalytic convertor works most efficently at the afr of 14.7:1 and efficency decreases as you go leaner from there. As I understand it, although CO levels fall with a leaner burn AFR, other emmissions rise. I'm gussing SO2? Who knows... I use a PLX devices wideband system to get my mixtures correct. Thus far i've tuned to 16lb boost and have 11.5:1 afr at that boost level. I'll be increasing that to about 20-22lb maximum when I get my new plenum. At 0 boost but full load i've leaned it back to 14.2:1. Peak power at this point is supposed to be made at 13.8:1, but this is my economy map... sort of. If I want power I rev it, make boost and its into 12:1-11.5:1 AFR territory. At present its around the 14.7:1 at light loads at 100k's in 5th. Incidently thats about -10 in-hg on the boost gauge. As the Wolf ecu uses a MAP sensor not a MAF, I can easily identify that load point and tune that afr accordingly. As suggested by paulr33 and Busky2k 15-15.5:1 is about what is considered fairly safe too. I don't have a EGT sensor though which is a shame because it would be extremely useful! One other variable is that Paul's got an R33 which is a 9:1 CR engine if i'm not mistaken, and the RB20's are lower at 8.5:1 CR. The higher CR will allow a leaner burn due to better fuel/air squish, while maintaining a lower EGT in comparison to the same AFR on a lower compression RB20... in theory that is... Thats my problem... lean tuning is mostly theory for me at the moment as i've read a fair bit but have yet to come accross a good tuner with real answers and RB experience.... I asked the question of one of the guys at Sub Zero today and he was going to ask a few other tuners and get a concensis for diferent RB engines. I'll let you know how that goes... Fact is, 99% of tuning is all done for that top end power figure, which is a little odd becuase when you think about it, thats about where 1% of your actual driving is done.... So long as it drives in traffic, doesn't over heat and makes a shitload of top end HP, is aparenty all the average skyline owner wants. :S Or at least what the tuners tune for... Everyone feel free to jump in and correct me here... Cheers, Ian.

Got a question for the professional tuners out there... In light of our expected fuel price increase to a minumum of $1.40/litre for unleaded and probably up to $1.55-$1.60 for BP ultimate over the easter break i'm going to make sure my car has the best possible low speed economy tune in it. So... this brings me to how lean can you go.... For when the car is cruising at speeds of 60-110k's under light load, as in not accelerating it should be possible to run the car considerably leaner than the 14.7:1 AFR that the catalytic converter functions best at. To be honest, emmissions be dammed! I want to maximize my fuel economy to the limit of what my RB20DET can do. From research i've done in this area with other makes of car, Saab for example can run as high as 17:1 at 120km/h without any engine damage, and get 7lt/100km economy. Does anyone have any real tuning experience as to how lean you can take an RB engine under light load conditions while it still being safe? I was thinking 15.5 should be possable at least... Cheers, Ian

Got any pics? And how wide are the stock R34 rims?....

I wouldn't be game to compare the two. There is no doubt that a Sub Zero plenum is awesome quality, hand made and australian quality parts, but it all comes down to what you want to spend. The GTR style single throttle body plenums RRP for about $918 AUD in new zealand, and the GREDDY style ones RRP for about $915. So its about $300 cheaper for one of these taiwan assembled units. In the end performance comes down to flow. So provided its match ported to your head/throttle bodies it will do well. Weather it be a sub zero plenum or any other one, it will still require this kind of work to be performed if your chasing serious ponies! Out of conisidence i'm ordering a Sub zero plenum tomorrow myself!

Hi everyone, I'm ordering stock for my new e-business that I am in the process of setting up. To help lower costs of importing the first lot of stock I am putting the word out for anyone that wants to be involved in a group purchase. The supplier is in Taiwan. The pricing listed below is in Australia. I've calculated the costs of Import duty and GST into the pricing, so items will cost what is listed plus freight to your door(see below). So, here's what is available and its price landed here in australia. INTAKE PLENUMS RB20 Intake Manifold or RB25 Intake Manifold $502.49 RB26 Single TB conversion Intake Manifold $502.49 RB26 Greddy Style Intake Manifold "Polished" $689.69 SR20DET Intake Manifold "Polished" $541.90 Available with throttle body flanges for standard, 73, 80,90 and 100mm. Throttle bodies (Veilside Replica's) 73mm Throttle Body $345.46 80mm Throttle Body $376.87 90mm Throttle Body $408.27 100mm Throttle Body $492.02 Available in either blue anodised or clear anodised finishes. FREIGHT Freight to anywhere in australia will have to be calulated but I can say that small items <3kg = $11.60 overnight freight. <5kg will be $16.10 for overnight freight also. Larger items such as plenums will be sent by mail and should be less than $30. To participate in this group buy, email me and tell me what you are interested in purchasing. I'll be maintaining a register of who's buying what. Then once I receive the volume pricing i'll email everyone back what the final delivery price will be for what they want. So the details I'll need are: Name: Shipping Address: (Preferably a place of business so packages can be signed for) Phone or Mobile: Email Address: Item(s) you are interested in: Once I've got your details I'll keep you up to date and give you a freight quote. This group buy will close on the 17th of April (2 weeks). At which time I'll make contact with those that have expressed interest. Product will arrive in Australia by the 8th of May at the latest. Thanks, Ian Swinkels. Mobile: 0434 147 478 or 0740527220 (business hours) [email protected] (this address is SPAM filtered, so if your mail bounces try [email protected])

Hi Guys, Well i've discovered that my GTS4 hooks up pretty well. So well in fact that i get a fair amount of clutch slip as I launch. So i'm thinking of upgrading the clutch. I've done a few searches but have yet to come up with any info on anyone running a 5 puck disc/clutch setup. I run a 4 puck in my other 300rwhp car and it holds fine and am used to the harsh engagement. Is anyone else running a 5 puck setup at all? I expect to be pushing the tune of my RB20 to about 350 rwhp. Thoughts and suggestions.... Second question... Changing the clutch. Which is easier. Removing the engine or removing the gearbox. I'm thinking the gearbox... I have access to a hoist so I can probably do it in a day I hope... Thoughts and suggestions here too...! Cheers, Ian

Coils are sold.

What he said!

Cairns, in queensland. I can freight them anywhere in australia using a Toll overnight bag for 11.50.

Ok... $500... any takers?

Hi, I have access to waterjet and CNC cutting equipment so i've been contemplating making up a match ported cnc machined adapter plate to allow the GTR 6 throttle body and plenum to bolt on to an RB20. I have all the design tools and machinery needed to do the job, but what I really need is some to scale drawings or scans of the intake gaskets for the RB26 and the RB20 so I can merge the two to make the match ported plate. Does anyone have any gaskets or scanned images of them that are to scale? Alternativly where would be the cheapest place to source a couple of gaskets. Obviously I dont want to waste a lot of money on this incase it turns out to be a waste of time. Cheers, Ian

Hi all, I'll be installing my MSD DIS4 on my 3 coil waste spark ignition system this weekend. At the same time I am intending to run a much colder plug than the BCPR6's that are currently in the engine. For two reasons... 1 is to reduce any possability of the plug causing detonation, and 2 because the CDI ignition system will drive a hot spark into the coldest of plugs just fine. I'm running lamborghini ngk D9EA's in my 7.8:1 cr turbo vw race engine with an MSD system and it runs fine with no plug fowling so I'm expecting to see a simular result with the skyline RB20DET. I am curious to know who out there is running an BCPR8 or BCPR9 plug out there in their RB engine and what boost and ignition system alterations they've done, plus the results or observations if any...? Cheers, Ian

Ok.. Price drop to $600... As for the group buy you'll find that Nengun don't pay for your import duty and GST etc, so be careful if your hanging out for that group buy. If its over $200 AUD and shipped bya courier the government will screw you for their cut. Assuming a group buy price of $550 per set... Customs value (Cval) 550.00 Customs duty (Duty) @ 5% of Cval 27.50 (Payable) International transport and insurance or postage (T&I) 0.00 (part of customs value) Value of the Taxable Importation (VoTI) (Cval+Duty+T&I) 577.50 Goods and Services Tax (GST) @ 10 per cent of the VoTI 57.75 (Payable) Total payable Duty + GST 85.25 So the splitfires will cost you 635.25 all up Check out http://www.customs.gov.au/site/page.cfm?u=5549

As an option to an outright sale of the coils i'll consider trading for parts that will fit an R32 GTS4, so if you've got something that will fit, email me and we can work something out. Parts I'm looking for are: A set of GTR 16x8 and 16x9 mags R32 GTR front bar RB20DET Plenum or RB26DETT Intake plenum and throttle body setup with injectors and fuel rail. Cheers, Ian Swinkels.

Hi, I have forsale a set of new SPLITFIRE RB26DETT/RB20DET coil packs with the code SF-DIS-001. I had them installed in my engine for all of 2 days but have now opted to upgrade to a CDI system and run external coils. The coils have the original packaging as pictured. I can ship overnight anywhere in Australia (major centers) for $15.60 by express courier. REVISED>>>>>>>>>>>>>>>>> Price drop Asking price is $500 firm. I paid $900 5 weeks ago. My details are: Name: Ian Swinkels Mobile: 0434 147 478 Email: [email protected] Phone, email or message me via the forum if your interested. Cheers, Ian