OK guys here is my current engine setup...

ENGINE

53J Block
ARP Mains Studs
'98 RRM 4 Counterweight Crankshaft
96J High Port Cylinder Head (decked 1.2mm + ported & polished)
ARP Cylinder Head Studs
1.1 mm Cometic MLS Head Gasket
8.5 comp. DET Pistons
Eagle ‘H’ Beam Conrods
A.R.P. Conrod Bolts
DET Crank Girdle
Modified Oil Pump
DET Oil Pick-up
'92 eGT Fuel Rail
S15 Silvia SR20DET Fuel Injectors
FSE Adjustable Fuel Regulator (+ monitoring gauge)
Walbro 255LPH High Pressure Fuel Pump
Powertech Fuel Pump Hotwire Kit
MSD Digital 6AL Ignition System
NGK ’Platinum’ 7 Iridium Spark Plugs
'92 eGT Distributor
'92 eGT Ignitor Chip
'92 eGT Ignition Coil
Mine’s GTiR ECU (8200 rpm limit, no fuel cut, no speed cut)
Greddy E-Manage
Z32 MAF
Pipercross Air Filter
O2 Induction Intake Manifold (one-off design to suit engine bay dimensions)
Modified VZR N1 Throttle Body (70mm)
VZR N1 TPS
Outlaw Engineering Thermal Spacer
AET Turbos GT297153R
Modified Equal Length Tubular Exhaust Manifold
Custom 3” Downpipe
3” Short Side-exit Exhaust
AET Turbos FMIC
Stepped (2.25" - 3") IC Piping (HOT)
3" IC Piping (COLD)
Turbosmart Single Stage Boost Controller
Turbosmart Recirculating Valve
JWT S4 Camshafts (266 duration / 11.79 mm lift)
Ferrea Titanium Retainers
JWT HD Valve Springs
'92 eGT Sodium Filled Valves
HKS Adjustable Camshaft Sprockets
Greddy Rocker Arm Stoppers
Koyo Racing Radiator
NISMO 18.2 psi Radiator Cap
NISMO Thermostat
Unorthodox Racing Pulleys (crankshaft + water pump)
ES Polyurethane Engine Mounts

TRANSMISSION

RS5F32A Gearbox (4.178 final drive)
NISMO 1.5 way Differential (90% lockup)
Custom Driveshafts
Modified Hub Carriers
JGY Customs Hybrid Clutch (ACT ‘Xtreme’ pressure plate + 6 puck disc)
Fidanza Flywheel (8.8 lbs)
Modified B&M Short Shifter
Modified B&M Shifter Knob
ES Polyurethane Transmission Mounts

CHASSIS

Almera GTi Brake Callipers
EBC Turbogroove Discs
Mintex Race Pads
Leda Custom Front Coilovers (height adjustable / independent dampening adjustable)
Leda 200 lb Front Springs
Spax 400 lb Rear Springs
Leda Custom Adjustable Rear Dampers
Whiteline Front & Rear Anti-roll Bars
Whiteline Polyurethane Anti-roll Bar Bushes
NISMO Polyurethane Wishbone Bushes
NISMO Polyurethane Front Top Mount Bushes
Lexan Side & Rear Windows
Bogart Racing ‘Pro-4’ 15*8 Wheels (FRONT)
M&H Racemaster 23*8.5*15 Slicks
Bogart Racing ‘Pro-4’ 15*3.5 Skinnies (REAR)
M&H Racemaster 22*3.5*15 Skinnies

As you may or may not know, the engine made 361 HP / 309 lbft @ 14 psi & 374.5 HP / 324 lbft @ 20 psi.

See the following thread to view the graphs...

http://www.sr20forum.com/showpost.php?p=1615662&postcount=13

What I'd like to know is where I should go from here...

Suggestions please for either the O2 Induction manifold or bigger turbo i.e. GT2871R or GT3071R.

Cheers

Dave

Take out the turbosmart boost controller and switch for a better one.

AVC-R for a good traction
Profec for a easy use
ETC....

You are near the maximum power of the Disco, so a bigger turbo would be the route...then an O2 induction manifold with the TB that you already have should be good to kill anyone on the track !

BTW, you have a real nice projet !!! I always dream to put a SR20DE in the back of a Micra (older one..like 1988)

MArt

sc61 in a t04s housing w/ bigger fuel injectors, an intercooler that willl handle it.

sc61 in a t04s housing w/ bigger fuel injectors, an intercooler that willl handle it.
I'd go with the GT3071R and if you are able to afford it, O2 Induction manifold

Weren't you having horrible traction issues before?

C1 camshafts

I'm gonna take a guess that he would want to keep the turbo into the T2 flanged family for minimum modification for piping, DP, lines etc etc. Personally I would get the 2871, O2 mani., and seeing as you already have springs and retainers get some C1's. Sell your old setup to help pay for the new setup.:cool:

spray it

Bigger turbo..... I think I'd skip the 2871 and go straight to the GT30 series since you're looking for big power. The spool up penalty with the GT30 shouldn't be too bad compared to the 2871.

I'd go with the GT3071R and if you are able to afford it, O2 Induction manifold

I'd say go with the gt3071r also.

Weren't you having horrible traction issues before?

Yes, I still am, but I'm working on it...i.e. bigger tires and proper suspension!

Do you think that there will be much to gain with the O2 manifold with my setup as it stands or is the turbo simply not going to flow anymore air.

I may make the same power but with less boost pressure right???

Do you think that there will be much to gain with the O2 manifold with my setup as it stands or is the turbo simply not going to flow anymore air.

I may make the same power but with less boost pressure right???

Yup, that's my thought on it. That turbo is pretty much doing as much as it can. Adding the manifold will not really increase your peak power, just reduce the boost pressure required. I think at least...

Hey bro...I've seen vids of your car and freekin' love that thing.You do seem to be pushing the limits of the mighty Disco P"(I run the 1 in my 123 mph trapping SE-R) but i did notice something that seems to be getting glanced over.I dont see a listing on your mods for an external wastegate conversion.I have seen as much as 17-20whp by ditching the internal 1 .though ,at your current power level,you'll make a little less.You should ,however,be able to get closer to 400whp.

Just to let you all know guys...my power & torque are measured at the crankshaft, NOT WHEELS, if that helps at all!

Damn...Knowing that,you can get a lot more out of your car.I am currently making in the low 350whp range @ 16psi w/the internal gate.I'm switching to external next because of the gains i've gotten on customer cars.

I would go... o2 intake manifold....gt30r 0.63 that means its whole new setup..... if you wont to keep the manifold just the the gt3071r ...