discopotato03

Stagea block ?

Looks like a polished Garrett TB31 to me . Let me guess , the turbine housing is .58 A/R .

Hi all , if anyone has access to a U13 Bluebird (93-97 ?) can you confirm if they have Red Top SF injectors because some people in the US say that NA KA24DE (DOHC) engines use these . It would make sense given their ~ 600cc cylinders and could well be a cheaper source of S15 manual turbo type 444 odd cc injectors . No Im not starting any business and no it won't be called Discotech ... Cheers A .

Spray pattern reported to be good .

Because the valves are open further per camshaft degree with the high lift version it would breath better . In the US they like to plot cam profiles and show duration at 50 thou lift , if you could overlay the two graphs the difference is rather obvious . The down side is that the valve train becomes noisy because the lift ramps are more agressive . Also because valve accelerations become greater is is more important to use suitable valve springs to control the valves innertia and overcome valve crash or bounce . Also you MUST avoid spring coil bind at ALL costs because otherwise it will destroy itself . Cheers A .

Yes I'm sure those in the know would rather keep it under wraps . So highly likely people have been paying big money for very little difference over standard fare . You gotta love market forces . Cheers A .

I'm still waiting for feedback from the States about a fellow using Nissan SF 270cc injectors shaved to 550cc in a V6 Probe Turbo . He did this a year or so ago (pre turbo conversion) and with a "basic" piggyback (I think) called Mega Squirt , said he got factory idle - std injectors were ~ 220cc . Our big issue is cost , everyone would use Nismo 555's or even the Red S15 injectors except for the $900 or $450 + price . Even if fuel consumption suffered by some small amount to use up the difference in fuel cost would take some time . Fingers crossed the PFC is as good as everyone says it is . When I can find one I intend to de cap a pink top GA16DE injector which I believe are side feed and have it tested alongside an R33 GTR injector , in theory this makes for two single pintle valve injectors of around 440cc . Provided the spray pattern is similar/same then that makes an easy upgrade for my R33 and cheaper than S15's . If it then runs out of fuel well I suppose decapped 270's at 550 odd should be ok . As I mentioned before I previously used Bosch 403 injectors which are a single valve 503 cc injector and when clean really moved some fuel on the test bench , probably very similar to the RX7 ones . Ages ago I asked SK about RX7 injectors as an RB26 upgrade and he had no problem with them . He said the issue was getting enough fuel in at the boost threshold phase . Till then have to wait and see . Cheers A . Cheers A .

Ok but what'll be the figure ? Cheers A .

What sort of cost involved in new bits ? Cheers Adrian .

Yes his input would be good . Just on the RB25DET 370cc injectors I think they end up in the 550-600's depending on fuel rail pressure . The 270cc variety may be the same thing with smaller cap holes . I'm trying to find out if Pulsar GA16 injectors are side feed and what they are likely to give with the cap removed because some people may want a cheap mid 400's cc injector . From what the Americans say about the Subaru and Nissan injectors the spray pattern is like a narrow angle cone . Just to refresh can some one put up the cc/Hp formula please . Cheers A .

Yep GT2871R series turbos use the high performance GT28 turbine with Garretts 71.1mm GT35 series compressors in 48 or 52 or 56 trim . There are variations in both turbines and compressors in the GT3071R/GT2835 series cartridges/turbos . Don't be confused by HKS terminology - the 28 in 2835 does NOT mean it uses a GT28 turbine , they ALL use a cropped GT30 turbine in 84 or 90 trim . The turbine takes one of three forms , cropped or 56.6mm OD in 84 or 90 trim . Unmolested in 60mm 84 trim . The real GT3071R uses the 60mm 84T turbine . Compressors are same deal as the GT2871 or 71.1mm 48/52/56T . Same old same old , drama is always getting a T3 flanged exhaust housing to suit the chosen turbocharger . Three options with the GT2871R (or any GT28 series turbo with same turbine) . 1) Rat up the .64 A/R HKS housing from 2530/2540/2535 or GT-RS . 2) Reprofile one of the Nissan/Hitachi RB20/25/VG30 housings . 3) GCG's recent custom housing . With "GT3071R's" there are some traps . Firstly some are made with the cropped GT30 turbine which would be sort of ok if the exhaust housing was GT30 based ie like HKS's T3 flanged ones . Sadly Garrett and HKS like to sell the things with bored out and butchered T28 flanged GT28 housings which don't work . Garrett call them "GT3071R-WG" and they are dogs . HKS also did it with GT2835's aimed at SR20/CA18's which have T28 flanged exhaust manifolds - note I mean the integral waste gated ones . HKS also have T28 flanged GT30 turbine housings that DO work just no integral waste gate . IMO the ones worth using are the real GT3071R cartridge number 700177-5023 and one or two of the HKS custom combinations of the cropped GT30 turbine with the 52 or 48 trim compressor . The HKS option is expensive and may not get you the exhaust housing you want . The real Garrett 3071R can now be had with Garretts own GT30 integral waste gate exhaust housing so its reasonably easy , I would use the smaller .63 A/R housing if you do this . RB20's have small ~ 330cc cylinders so not a mountain of torque at low/med revs . A bit of boost early on helps but if the compressor is a healthy one and steps are not taken to minimise it they surge badly once they get going . The old fix was to use larger A/R turbine housings but then you lose the bottom end torque . HKS gets around it by fitting port shrouded compressor housings ie to their RB specific GT-RS and possibly their RB type GT2530 which may have been called GT2530KAI . Some firms can do a ported shroud by machining the large boss type TO4B compressor housing like GT2860RS's and many GT2871R turbos come std with . Something like this or the RB type HKS GT-RS (GT2871R 52T with HKS housings) would probably be nice on a street RB20DET . Or if you know someone running the ball bearing Hi Flow get them to take you for a spin , you may like it . Cheers A .

So far good reads at : 1) Probe Talk - "How to get 550-600cc injectors for $100 - for our stock rails" 2) NASIOC - "740cc injectors for free" Some people in the US are claiming that Nissan side feed injectors are all the same but with caps of different sized holes to graduate maximum flow . Makes sense if the only difference is the plastic dye and end cap . They seem to be using Pink Red and Blue/Grey colour coded injectors and with the cap off claim 440 550 and 880cc flow rate at I think around 43 Psi . There is some kind of injector from a "KL" whatever that is that even has a plastic cover cap that aims the stream at each inlet valve but need more time to look into that one . What Arnie said , cheers A .

More searching to be done . I remember one convert saying that they were getting good spray patterns and factory std idle so looking good thus far . Acid test will be testing along side a factory high flow injector ie Nippon Denso 555/740cc injector . My FJ20ET had single pintle Bosch 403 550cc injectors fitted and I think some top feed RX7 turbo injectors are a similar thing but high current low resistance . Would really like to see if end caps with set hole sizes can be obtained to retain the multi hole spray pattern . Cheers A .

Thanks for that , I dont suppose I could have a pic of an injector (R33 side feed) and its o ring and pintle cap because side feeds are new to me . Cheers and thanks Adrian .

Whilst getting square eyes I stumbled on a string at Probe Talk about modified side feed Nissan SR20 injectors for the Probe V6 . They claim that these Nissan side feed injectors have a cap with four small holes spot welded at the business end , if this cap is removed you find a single pintle valve that gives a nice pattern and a garden variety NA SR 20 injector of 270cc suddenly becomes 550cc . Some jem from George Dubbyaville worked out that the mod gives 2.15 times the std flow rate which is a bit interesting eh ? I could be wrong but the 370cc version gave I think up round 740cc . The KA24DE (DOHC 16 from US spec S14) must have 440cc squirters and ended up in the 800's somewhere . Do a search on shaved injectors but have plenty of time to read the posts . Is this stuff well known about or just new to me ? Cheers A .

Hi all , are these seals or O rings a service part thats easy to get or genuine only . Cheers A .

PM sent .

I may be interested less the actuator but I want to see some pictures of it . Also what about the water and oil lines . Cheers A .

It looks like its been running with a questionable air filter at some stage . Cheers A .

Hi all , looking for a turbine housing from a HKS GT3037 Pro S . A long shot I know but someone may have had the .68A/R housing and changed it for the .87A/R sized housing . Cheers Adrian .

Yes I agree , I've never yet seen a real GT3076R with a .70 A/R compressor housing . You could nearly bet that thing is either a GT3040R (GT3082R) or one of the victim grade GT30+ TO4S compressor wheeled horrors . With the real GT3076R's (cartridge wise same as HKS's GT3037's) the power rating is claimed to be 450 and 480 PS for the 52 and 56 trim compressors in Garretts TO4E .60 A/R port shrouded compressor housing . Cheers A .

1) R33 GTR 2nd hand . 2) Std just Nizmo Exhaust , better cat , better panel filter . 3) Straightforward because R33GTS25T/R33GTR are interchangable , one out one in . Things I noticed were the length of one of the slides was slightly different with the R33GTR bracket . The GTST pump sat right at the foot of the tank with its sock filter where the GTR pump sits a little higher and is connected to the sock filter with a short length of steel tube/pipe . If I had my time over again I'd have looked at fitting the GTR pump to the GTST bracket but not worth pulling it out again . Noise wise it sounds like 3 wasps instead of one when it primes . Can easily hear the pump tone change off idle (closed throttle) taking off in first . My car has a very quiet Nizmo exhaust so its noticable but not to any great degree . I chose this pump because they fall in (almost) the price was very good and was advised not to go overkill in this area . Provided I can get injectors large enough to make the power I'd like which is about 250kw at 1 bar boost and std fuel rail pressure it may just about be enough . I'd like to avoid pushing the fuel pressure up because it limits the volume the pump is capable of moving . The downside is that injectors cost more than fuel pressure regulators so either S15 or aftermarket ie Yellow Nippon Denso - ouch ... Cheers A .

That is because a "GT37" turbo is a GT37 turbine based turbo whereas a GT3076R/GT3037 is a GT30 turbine based turbo . Yes the GT37 turbos have either GT37 or GT40 series compressors ie 76.2mm or 82mm . Try not to confuse turbine and compressor families , a "GT30" turbo does not have a GT30 compressor though a GT37 turbine based turbo can have a GT37 series compressor and is nowdays called a GT3776 . The 82mm compressor version is called a GT3782 . If a GT30 turbine based turbo has an 82mm compressor its known as a GT3082R or a GT3040R because smaller series GT40 compressors are 82mm OD . The one I mentioned has a GT30 turbine and the 76.2mm GT37 series compressor , Garrett call it GT3076R and HKS call it GT3037 . If they really wanted to get it right they would say 60mm 84T GT30 UHP turbine/52 trim 76.2mm BCI-18C compressor - bit of a mouthfull . Cheers A .

Its the one intended for their GT3037 Pro S turbocharger . I think The Overboost Store (US) shows a listing of HKS housings or some of them anyway , possibly Nengun as well . I have seen a few HKS housings at GCG in Sydney but have not asked Brett specifically about the Pro S ones . I will when I get the chance because I'm interested in them as well . Cheers A .

I reckon a GT30 turbine based turbo is a bit much for an RB20 if you want/need boost (torque) response to be as close to throttle response as is possible . I have no interest in drift but getting the car to do "controllable" opposite lock slides is going to need precise power modulation to be repeatable/consistant . I'd be looking at turbos with more low end and mid range because getting the thing to break traction and not fall off boost if you back off a little is going to be important . So possibly a GT2530/GT2860RS with the 2530 HKS turbine housing/GT-RS or GT2871R 48T . One problem you WILL come across is going to be compressor surge so a port shrouded compressor housing is going to be a must with an RB20 that needs to have high manifold (boost) pressure with not tonnes of airflow . The RB specific GT-RS has this , the large boss type TO4B compressor housing that the GT2860RS and GT2871R series use can be drilled and slotted or machined for an insert like the HKS TO4Z has . Cheers A .