Boost recomendations?

[XTCshri2222]

I'm planing to have my car dyno tuned in about 2-3weekswant to know how much I should boost.

I was thinking 14.5PSI

My motor:

Stock internalsStock head gasket etc.Stock headstock injectors

Mods:

*SAFCII*Huge FMIC - not sure on dimentions but it's big2.5" FMIC pipe*Tube turbo manifoldhigh flow dump pipeturbo back 3" exhaust - no cat *TDO4 Hybrid turbo Greddy internals stage 3 rated for 25-30psi*walber 255 fuel pump*RB20 MAF*apexi BOV

[themadscientist]

I see no guages listed in there. If you do not have adequate instrumentation I would not even bother. I have heard of people "listening for knock" while tuning without guages, bad juju.

[XTCshri2222]

I have Boost gauge, oil temp and oil pressure gauges. I just listed what i thought would be important to boost.

full list of my mods: .:Exterior.:Silvia K’s ConversionMonkey Magic Front BumperBomex Side Skirts30mm Front Wide Body Fenders50mm Rear Wide Body Quarter Panels17” Excel RH5 WheelsHankook TiresH&R 15mm Front Wheel AdaptorH&R 25mm Rear Wheel Adaptor.:Performance/Electronics.:CA18DET swap5speed transmission conversionStage 3 TD04-H Turbo ( Greddy Internals) T25/T28 flangeCustom FMICTubular Exhaust ManifoldSS Auto Chrome Turbo Back Exhaust 3”diaApexi BOVApexi SAFCIIBoost ControllerRB20DET MAFWalbero 255 Fuel PumpRacing Head GasketBattery Relocation Kit (trunk mount)High Flow Intake FilterNGK plugsGlow Shift Boost GaugeGlow Shift Oil Pressure GaugeGlow Shift Oil Temp GaugeNismo Racing HarnessesEibach Sportline SpringsKYB Shocks & StrutsFront Strut BarRear Shock BarRear Tie BarCustom Camber Kit
Modified by XTCshri2222 at 7:42 AM 2/25/2006

[themadscientist]

does the shop who will be doing the dyno run have a wideband a/f sensor to watch your mix? I didn7t notice bigger injectors in that laundry list, are you still running the 370s? If they are not cleaned and squirting like new I would not push them past 250hp, at some point they will be a hinderance even with increased fuel pressure.

[c-rad]

I'm planing to have my car dyno tuned in about 2-3weekswant to know how much I should boost.

I was thinking 14.5PSI

My motor:

Stock internalsStock head gasket etc.Stock headstock injectors

Mods:

*SAFCII*Huge FMIC - not sure on dimentions but it's big2.5" FMIC pipe*Tube turbo manifoldhigh flow dump pipeturbo back 3" exhaust - no cat*TDO4 Hybrid turbo Greddy internals stage 3 rated for 25-30psi*walber 255 fuel pump*RB20 MAF*apexi BOV

How the hell can a TD04 turbine wheel/housing flow enough air for 25-30psi? Please tell me where you are getting this information from, because a TD04 turbine housing is about the same size, if not smaller than a T25 housing.

[XTCshri2222]

How the hell can a TD04 turbine wheel/housing flow enough air for 25-30psi? Please tell me where you are getting this information from, because a TD04 turbine housing is about the same size, if not smaller than a T25 housing.

Thats what it's rated, i'm not gonna test it out though hahathe spec on it is greddy stage 3 turbine. I was told it'ed handle that much boost.

The only reason I replaced it with that, is I needed something ASAP, my T25 is giving death smoke.

This is the specs if it helps. i wasn't planing on pushing more then 17psi at the max ever.

TD04-H Turbo T25/T28USA or INTERNATIONALNissan Flanged T25/T28 Turbo • TD04H-15G • 1.625 • 2.187 • 55 • TD04H-15G • TD04H • Nissan Flanged Greddy Stage III Turbo with Internal 8.7 psi spring / actuator

[XTCshri2222]

does the shop who will be doing the dyno run have a wideband a/f sensor to watch your mix? I didn7t notice bigger injectors in that laundry list, are you still running the 370s? If they are not cleaned and squirting like new I would not push them past 250hp, at some point they will be a hinderance even with increased fuel pressure.

stock injectors, the dyno shop dose have wideband.

[XTCshri2222]

did some research the turbo seems to be good for 20psi, if i can read this chart correctly? http://www.stealth316.com/images/td04-1 ... 5g-raw.gif

[Bwana]

There was a guy from Sweden or some place like that that was running something like 290 whp on a td04 14g (I think, might have been a 16). You should be able to pull up the thread by searching the archived stuff... As long as your shop has a wideband you should be ok, just keep an eye on your fuel with stock injectors.

[c-rad]

This is the specs if it helps. i wasn't planing on pushing more then 17psi at the max ever.

TD04-H Turbo T25/T28USA or INTERNATIONALNissan Flanged T25/T28 Turbo • TD04H-15G • 1.625 • 2.187 • 55 • TD04H-15G • TD04H • Nissan Flanged Greddy Stage III Turbo with Internal 8.7 psi spring / actuator

Sounds exactly like an SRT-4 turbo which is a TD04LR-15G. And those are good for 20psi max, so yeah, that sounds about right. Should be able to get about 300whp out of it...roughly.

[XTCshri2222]

Sounds exactly like an SRT-4 turbo which is a TD04LR-15G. And those are good for 20psi max, so yeah, that sounds about right. Should be able to get about 300whp out of it...roughly.

300whp is enough for me hah anything more ill defiently get tickets.

[mikesim]

my friend has a TD04 from a turbo dodge on his 1.6L 4AGZE engine. dynoed 261whp on 16psi i believe. they're still tuning it for water meth and 20psi but they have to upgrade from coil over plug to ICD ignition.

at the very minumum, get a fuel pressure regulator, and bump up the rail pressure if you want anything more than 230hp.