LaurelPWR

Dredgggggeeee time; I have recently finally started driving the car. It sat for so long that the fuel tank gave birth to rust sludge and blocked my lift pump sock and one of my walbro 460's and left grime, rust chunks and muck all through the surge tank and system. I decided to commit and pull the trigger on an oem r32 gtr fuel tank and Frenchys twin 460 / sender / surge tank hanger combo and all new larger lines and fittings etc, also boost doc heater hose kit / new heater core and a heap of other bits and shits like wideband sensor installed in the dump and Syltech iacv + lines and all wired and added to current tune. now having lightly driven it a couple times without issue, I can happily report on the hta3076 in its current tune. still no boost control switched on, 20psi gate springs, car makes 22psi at 3200rpm in 6th gear with 30-50% TPS from cruise at 100kmh. Going by the old graph, this means it should be making 300-325whp at the same numbers above. Very very responsive setup under true road driving loads. all that's left for the build is body loom + PDM, finish the remote aircon setup, install carbon fibre parts and go for full tune and 30psi. the 315 rear tyres are now performing like they're 195's, wheel spin in any gear at almost any rpm, whereas my previous setup hooked up in 3rd no issue, albeit Nt01's back then / RB25 5spd vs (new) old date r888r's Z34 6spd now, + obviously all the support upgrades I listed in the quoted post above. car sits at 1-3psi on cruise at 100kmh, expectations totally exceeded and I'm beyond stoked with all this so far. IMG_4848.mov

*all RB25 s1 if I hadn't said yet, sorry guys haha

Just a basic run down of the relevant bolt-ons. All e85 First graph 406.9whp is HKS GT-RS, HPI manifold, 3" bell mouth dump / 3" straight through fake cat / 3" all the way to the rear and no resonators, nismo 740cc, walbro 460, oem RB26 itb's, power fc, eboost2, Greddy Spec M fmic, poncams, Turbosmart actuator, splitfires, ARD 150amp alternator. Blue line is same as above but Blitz Dual SBC (before i upgraded to eboost2) and 100cell "high flow" cat. Red line is after installing eboost2 and the fake 3" cat (it's just a 3" pipe with a cat shell welded onto it). Huge gains in response, as can be seen. Black dots are a mates sr20 with almost identical setup but uses a garrett 2871 instead oh HKS. Next grapghn 466.6whp is same as above, but HKS 2835 Pro S with the larger .87ar turbine housing, the special HKS Pro S dump pipe into a HPI split dual 2.5" front pipe and the rest stayed as is. Red line is after I welded the actuator brackets. (It was originally bolted together and was moving a couple millimetres under load). Green line is obviously before I welded the bracket, no other changes. 100whp gain at 3750rpm, massive gain for such a simple fix. Third graph is my current setup, huge changes. 469.7whp R31house twin scroll manifold, twin TiAl 38mm gates, Forced Performance (USA) HTA3076 with 1.01ar twin scroll rear housing, Link Fury+ and loom by 12volt, PRP trigger kit and r35 coil kit with r35 splitfire coils, HKS step 1 vct staggered cams, new oem lifters and performance springs, 49mm itb's w/port matched Nismo plenum, twin walbro 460 surge tank setup + 1650cc injectors, HKS Type R S13 600x300x103mm fmic, individual egt's, 4" turbo back with no resonators or cat and AES true straight through muffler + 4" butterfly off the dump pipe lower 90° bend. It's a preliminary tune with no boost control with using 20psi gate springs and 4" butterfly closed. Once body loom and PDM is compete, will go for 30psi tune.

Yes, at this stage of SAU threads, I automatically assume that anyone here knows that everything depends on each and every setup and its choice of parts and what an individual wants from the setup. I think your misunderstanding what I've said, I'm not saying your curve will move to the right.. I'm stating the opposite; that my setup has a much larger turbo than my last one, my current exhaust manifold runners are 2-3x longer than the last one, the intercooler is longer and thicker (hks 103mm thick), the itbs are now oversized from 45mm up to 49mm, and the plenum is now a larger Nismo plenum that's been port matched. As a result, I'm making more power, torque and boost 1000rpm earlier than my last setup. My curve moved left, in a big way. You guys with 800-1000+hp turbos should be considering hks v-cam or the other Japanese company Sakura who makes RB25 Neo vct adaptor kits for RB26's. they all make more power / boost / torque far earlier and higher peak numbers. Dahtone Racing modifies the Hks v-cam systems to his own specs and he also developed the worlds first and best dbw individual throttle body kits, to complement his V-cam. Every single car is 800-1200+hp and they all produce huge gains in response and peak power.

The "sacrifice of low end" is now basically irrelevant in 2025. Turbo/ecu/fabrication/and other tech advancements gives a vast array of options to mitigated any of it. My setup now is a fantastic example of this. 300whp / 20psi @ 3500rpm from a 600hp turbo setup on a notoriety low reading Dyno Dynamics roller dyno, is almost unmatched on all of SAU and other forums. The only other turbo i've seen that can achieve this is a BW EFR + twin scroll / twin gates etc etc etc... ps. tuned by Matty Spry at P.I.T.S as far as getting to the 600 figure, while enlarging your itb's alone probably won't get you there, as Sucram has stated above, it will certainly help. Just do it Predator1 my brother hahaha 🙂

Hey mate, thread dredging hahah To answer you directly, yes I had my itbs oversized and custom butterflies etc made by EFI Hardware in Sydney back around 2017-2018 if memory serves. My setup had a vast amount of other changes too though, so no direct comparisons unfortunately. i went from oem itbs, HPI manifold and internal gate hks 2835 pro S; to 49mm itbs, cnc port matched Nismo plenum, RB25 Neo lower runner adapter hand port matched, r31house v2 Takoashi MAX equal length twin scroll manifold with twin 38mm tial gates and a FP HTA3076 with 1.01ar twin scroll real hosing. feom power Fc to a link fury wired by 12volt, r32 gtr fuel tank conversion with frenchys twin 460 / surge tabk fuel hanger combo kit, 1659cc injectors, full 4 inch turbo back stainless exhaust, Z34 6 speed, Tomei 2way with 4.3 final drive and a ton of other shit. ive posted elsewhere here with complete run down, but here's a graph from its initial tune with no boost control on, 20psi gate springs only and e85. 7542AE72-DA92-4E0B-8660-B0940FEA7F24.mov

seeing this thread revived makes me very very excited for the future of these guys new tech, especially with them having smaller frame stuff being looked at too. Cheers @Lithium you the man, as always 🖤

These sell???

soooooo.......after literally 5 years of planning and slowly gathering parts, I finally got my HTA3076 1.01ar twin scroll setup on the rollers for the first time. •S13, rb25 s1 •forged Ross pistons •acl bearings Oem crank and rods arp bolts •Oem oil pump •Cometic 1.1 head gasket •standard head with hks 256 8.8 in / 264 9.1 ex cams •performance springs kit •RB26 itbs oversized and rebuilt to 49mm •cnc port matched Rb26 nismo plenum mounted using a RIPS RB25 neo cut&shut adapter also port matched •Bosch 1650cc injectors hand machined to fit the neo adapter and hks rail, potted plugs with remote clips under plenum •custom mounted genuine HKS fuel rail •genuine R31house version 2 twin scroll manifold with individual egt’s on each runner •Forced Performance hta3076 with genuine garrett 1.01ar twin scroll rear housing •4 inch stainless exhaust from turbo back with 4 inch AES butterfly valve off the dump and AES 4 inch high straight through race muffler •all stainless cooler piping and intake with true 4 inch HPI stainless mesh pod •HKS TypeR 103mm thick S13 intercooler •Grex remote filter block •ARC r32 gtr grille oil cooler •ARC washer-oil catch •ARC radiator swirl pot •ARC coolant reservoir •blitz radiator & 2x 14” ultra slim maradyne puller fans •ross metal jacket balencer •PRP trigger kit •PRP r35 coil kit + splitfire r35 coils •ARD alternator and PRP bracket •hks ex cam gear, Greddy intake rb25 VCT cam gear •greddy type R bov custom anodised PRP purple •hks timing belt •link Fury G4+ ecu and 12volt performance custom wiring loom •link aim strada colour dash, 4 bar map sensor •Turbosmart fpr •1x walbro 255 lift/2x walbro 460 in tank, Taarks v3 surge tank, all lines replaced and upgraded for everything •2x tial 38mm MVS external gates both with stainless screamer pipes •jk40c 370z 6 speed close ratio gearbox •Jim Wolf technology RB25 adapter plate •auto rb25 bell •1 piece aluminium tail shaft •Zspeed Performance stainless steel concentric slave cylinder / bearing / lines •NPC 1000hp twin plate clutch •Tomei Trax 2 way 4.3 lsd •driftworks front & rear drop knuckles •all solid bushes and all adjustable arms throughout entire car •whiteline RB s13 feont swaybar and long discontinued whiteline r32 gtr 32mm rear swaybar + solid billet SuperNow bush brackets •nismo/do-luck/cusco and many others body bracing throughout the chassis (approx. 20 of them) •full 7 point safety21 cage •bride Brix 2 special edition red stitched black leather seats •CarMakeRevive electric power steering column and manualised rack •E55 AMG 8 pot front and 4 pot rear brake calipers, Akabono pads, custom machined 340mm front disks, 324mm rear disks, project Mu rear brake shoes •wilwood bias valve in cabin •r34gtr bm57 master cylinder •custom braided lines •HPI radiator rescue air con condenser •Boot mounted air con pump •Work Meister 18x9.5 +3 front wheels & 18x11 -8 rears Forgotten a whole bunch of other stuff.....E85 Graph is only on gate pressure with 20spi springs, the exhaust 4” butterfly is closed and there is zero boost control turned on. It will be returned to the Dyno once wideband is sorted properly in the dump, then it will get 30psi and an open 4” butterfly for the main tune. It’s already quite responsive with 300whp & 20psi at 3500rpm. This Dyno is a renowned heart breaker so I’m pretty happy so far with the resultant response. I’ll update when it god back on the rollers again.

Cheers hombré, much appreciate 🙌🏼🙏🏼 Instagram is: genuine_rb13 for anyone interested 😅

Yeah I may do that actually, when I get a chance. haven’t driven it further than 2nd gear yet mans, will update when I do tho.....perhaps in a build thread.

Thank you kind sir. Many rare and highly specific parts in there haha ☺️✌🏼 IMG_4597.MP4

RB clutch, had a billet spacer made to sit under the concentric slave to help make it all work. You can see the spacer in the photo above where you see the green/stainless slave.

I forgot to mention my drive train.... jk40c 370z 6 speed close ratio gearbox, Jim Wolf technology adapter plate, auto rb25 bell, 1 piece aluminium tail shaft, Zspeed Performance stainless steel concentric slave cylinder / bearing / lines, NPC 1000hp twin plate clutch, Tomei Trax 2 way 4.3 lsd, driftworks front & rear drop knuckles, all solid bushes and all adjustable arms throughout, whiteline RB s13 feont swaybar and long discontinued whiteline r32 gtr 32mm rear swaybar + solid billet SuperNow bush brackets, nismo/do-luck/cusco and many others body bracing throughout the chassis (approx. 20 of them), E55 AMG 8 pot front and 4 pot rear brakes etc etc etc...

Thank you brother, I’m very glad to read that you see that effort in the finer things haha, I’m quite happy with it so far. My aim was 20psi by 3500rpm with the full send tune (boost control on and 4” butterfly open) and the fact it does exactly that as is at the moment is monumental to me personally haha. The car still needs body assembly so have only driving it approximately 100m up my street and back, it starts making positive pressure literally as soon as I crack the throttles, the response is insane and better than what’s shown on the graph honestly. I can’t wait for 30psi and full send tune!!

I would say I’m sorry for reviving an old thread, but I’m not, so I won’t. ......soooooo.......after literally 5 years of planning and slowly gathering parts, I finally got my HTA3076 1.01ar twin scroll setup on the rollers for the first time. S13, rb25 s1, forged Ross pistons, acl bearings, Oem crank and rods, Oem oil pump, Cometic 1.1 head gasket, standard head with hks 256 8.8 in / 264 9.1 ex cams and performance springs kit, RB26 itbs oversized to 49mm and a cnc port matched Rb26 nismo plenum all mounted using a RIPS RB25 neo cut&shut adapter also port matched, Bosch 1650cc injectors on a custom mounted genuine HKS fuel rail, genuine R31house version 2 twin scroll manifold with individual egt’s on each runner, hta3076 genuine garrett 1.01ar twin scroll rear housing, 4” stainless exhaust from turbo back with 4” AES butterfly valve off the dump and AES 4” muffler, all stainless piping and intake with true 4” HPI stainless mesh pod, HKS TypeR 103mm thick S13 intercooler, genuine ARC r32 gtr grille oil cooler/washer-oil catch/rad swirl pot/reservoir, blitz radiator & 2x 14” ultra slim maradyne puller fans, ross balencer, PRP trigger kit, PRP r35 coil kit + splitfire r35 coils, ARD alternator and PRP bracket, hks ex cam gear, Greddy intake rb25 VCT cam gear, greddy type R bov custom anodised PRP purple, hks timing belt, link Fury G4+ ecu and 12volt performance custom wiring, AIM link colour dash, 4 bar map sensor, Turbosmart fpr, 1x walbro 255 lift/2x walbro 460 in tank, Taarks v3 surge tank, all lines replaced and upgraded for everything, tial 38mm MVS external gates both with screamers etc. etc. Graph is only on gate pressure with 20spi springs, the exhaust 4” butterfly is closed and there is zero boost control turned on. It will be returned to the Dyno once wideband is sorted properly in the dump, then it will get 30psi and an open 4” butterfly. It’s already quite responsive with 300whp & 20psi at 3500rpm. This Dyno is a renowned heart breaker so I’m pretty happy so far with the resultant response.

Seriously man, can we see your graph?

I paid $2600 brand new man, I would think you would be fair asking 1500 for your turbo by itself ? can I please see your graph now ? Hahah

For sure man, I’ve extensively read and researched the Evo forums and practically everywhere hta30 over the years it’s taken me to get my setup slowly together hahah so yeah I’m expecting something very responsive. I’m hoping to get close to 550whp with 30psi and full boost at or before 4krpm as I have a few other supporting mods that are overkill for a turbo this size to help me get there.

Have you got a graph for the hta3076 on the RB25? Very interested to see as I have one going on an RB25 at the moment but I have a true twin scroll twin gate setup and oversized itb’s etc so a bit different...

Specs on your setup man?

My old setup got transferred to my partners car almost exactly as it was but tweaked slightly and made much nicer than mine was. rb25 neo, unknown km’s Tomei poncams 260 type B, HKS 56T 2835 Pro S .87ar, HPI turbo manifold with divider welded in at the flange and refaced, Hks special dump with 3 1/2 inch system 100cell cat and box muffler, Rb26 itb’s on rb25 s1 Lower runner adapter, nismo 740cc side feeds, Turbosmart fpr, eboost2, new apexi power fc, walbro 460 in tank, ARD 150amp alternator, splitfires, hks exhaust cam gear, Apexi pod z32 afm, ARC r32 gtr intercooler, ARC r32 gtr grille oil cooler, new water pump, new oem balancer, hks and cometic gaskets throughout, Turbosmart Internal gate actuator with 14psi springs (I ran 21.5psi springs when on my s1 RB25), Blitz radiator, Grex oil filter relocation kit. I ran this setup on My s1 with e85 with much more aggressive tune and higher boost making 470whp 25psi. Makes a fair bit less as expected but performance is extremely smooth and will get e85 tune in coming months, BP98 fuel, High boost 18psi red line was removed from tune as it was unnecessary and made no real gains worth keeping it.

Not by me yet, came like that from R31house. should be running in a few weeks

Thanks hombré ive made extremely detailed comments about these manifolds in other threads that you show interest in too haha

Car is still getting the finishing touches done before tune....hopefully in a month or two m. i ended up going all out and changed practically every bolt on and power adder hahah so it’s not going to be a direct comparison between the poncams and hks step 1’s unfortunately dudes....I do apologise. i will still post results once it’s tuned anyways ✌?