want more out of stock turbos. how to lower lag? come on quicker? any advice please.

just after some advice or info anyone has for me.

First up, goals, mods etc. Im chasing 300rwkw on stock turbos.

Stock turbos, bolt-on and lightweight everything. Engine is up to scratch (or will be by the time i do whatever i decide on). All bypasses, deletes, its nice and clean, runs well.
Got Nistune, getting some 650ccs as well to put in at the same time. Might chuck on the seperated dual intake i have lying around. a few years down the track I might upgrade the turbos, so they will be useful. But i might as well throw it on now when I get the nistune done. Im sure it will still add a few hp to the setup? (if anyone believes otherwise please tell me).

Chasing 300rwkw on stock turbos. Reason im doing this is pretty simple. I dont have anywhere to do an engine pull. I did a TT conversion on the street corner, and not keen for that again. So i dont want to pull the engine and fit bigger turbos until I have to. Instead, im liking the idea of keeping the stock turbos, and maxxing everything else i can to get the most out of them.

At the moment im really liking how soon they spool, combined with the NA rear end on, and my quiet exhaust. It sounds great, pulls hard, and is a lot of fun. Also I figure since its only street driven atm, theres no point on higher power, or more turbo lag. Or high speeds. I guess im aiming for ultimate street car status?

Just wondering what else I can do to the car. Anything that doesnt involve pulling the engine out. I have to pull the box in a month or two to fit clutch n flywheel. and im dreading that enough already


Im just wondering what I could do. Either somehow reduce the turbo lag as much as possible. No idea if this can be done, or whats required. But if anyone knows something, please let on Also how to get boost to come on quicker? When I get it tuned i guess ill get it set to 12 for daily driving, and high boost setting 15 for the occasional burst? Stock internals.

Just got some big brakes, and I dont think I need to touch the suspension. Its stock suspension but does the job fine.


If anyone has any ideas or opinions please let me know. Good or bad, more knowledge the better.

 

be hard to get 300rwkw out of stock turbos

• some good coolers, make some good ducts for them
• a good ebc to keep the wastegates closed longer
• good flowing exhaust including good dumps
• full seperate twin pod setup
• some good recircs/bovs
• injectors
• nisstune

this will prob give u the best chance of getting your highest number.

 

300rwkw on stock turbo's!?! Yeah, nah...

Possible, but pretty hairy. You're going to want a damn good tuner! Chuck the coolers and run meth injection. E85 would be nice too.

I wouldn't do it.

 

Your probably going to want to look into pre-turbo injection as well. Lowers the temperature of the charge air in the compressor and allows you to get a higher volume of air out of the stock turbos, effectively pushing the compressor map to the right slightly. Highly controversial as if you don't get it precisely right you will tear your blades apart.

The problem with stock turbo's is that to get the volume of air you want to reach the 300rwkw mark, you are well past your efficiency mark of the turbo's and your pushing alot of hot air.

To try achieve the figures usine E85 as a fuel, 650's are possibly a little small. 720's or 1000's would be better suited for it.

 

[*]got a front mount with a fish mouth bar.
[*]profec bspec II
[*]exhaust flows great. 2.5 mandrel with 100cpsi cats
[*]full seperate twin pod setup ready to go on
[*]got gfb hybrid bovs which are currently atmo but will be recirced
[*]injectors i think im bout to buy 650 or 750s
[*]nisstune also sitting in my room


hmmm maybe i should just man up and pull the engine put some 28rs on. but then id be so tempted to do all the internals and crap as well..


what i need is someone with gt28s to take me for a spin show me how different the lag is

 

No you can't, they did not fit out remember. We could get them off the manifold but would not fit past the chassis rail.

 

You need a special set of tools

- Angle Grinder
- Lumpy
- Mig

OR

an engine hoist

 

No offence but i hate it when people say "i want less lag" but "more power" sorry to break it to you but theres noway your gona get 300rwkw by doing simple mods (with stockies). If you want to achieve 300rwkw easily then you going need to upgrade the turboes.

If you want less lag then dont worry abut getting more power because MORE POWER = MORE LAG !

 

Only if you upgrade the turbo's to gain power...there are many other ways if you think outside the box without major surgery. I'm also a believer that 300rwkw can be achieved with stock manual turbo's on a healthy engine, although you are pushing the boundaries.

 

Get rid of that air conditioning compressor and fit a supercharger. Just hope you have got forged internals

 

You can get 300rwkw on stock turbos, its been done before(not very safe though). IMO E85, water/meth and 20psi should do it along with all supporting mods. There is only one E85 pump in NSW im pretty sure and its in rozelle.

 

more than that mate, at least 6 i think. I got caltex at heathcote 15 mins down the road with there BioFuel E85 $100.9

I can't wait to get my TT in. :br:

 

You can remove and replace standard turbo's can't you? If so just get some highflowed stockies and no need for an engine pull...although it's probally easier.

Also if you have been running 15psi and standard old injectors without a tune, I don't think you will see 300rwkw for long on a thrashed bottom end.

 

Ok so he might not be able to get 300rwk but what about less lag or spooling up quicker?

 

400horse has been done and dusted. your looking for big injectors, dual intake, boost controller. intercoolers, preferabbly manifolds and stronger gates 2 hold the boost at 15+psi to redline. 20 year old stocks just dont cut the mustard.
also dual 3" exhaust and if your serious 2.5" intercooler piping and throttles.

http://specialtyz.com/blog/?paged=2

100 octane, 20 psi for 463 whp.
Q16, 21 psi peak for 499 whp!!!!!!!

Completely stock/un-modified Bottom End
*Completely stock/un-modified 40P Heads
*Completely stock/un-modified 5 speed cams
*Completely stock/un-modified 5 speed turbos
*Specialty Z Custom Dyno Tune 91, 100 & 116
*Specialty-Z SS 4-Bolt 3" Expansion Down Pipes w/ wastegate Separators
*Specialty-Z SS 3" Test Pipes
*Specialty-Z: SS 3" Single Oval Cat-Back Exhaust
*Specialty-Z 6QT Oil Pan
*Specialty-Z Multi Map 16 Program Switcher
*Specialty-Z 1 Piece Clutch Line w/ New Slave Cylinder
*MSP Manifolds
*Selin Translator
*Custom "Intercooler" Piping 2.5"
*Custom "Suction Pipes" w/ Jim Wolf Dual 350Z Filters 2.5"
*Custom "Accordion" Pipes 2.5"
*Stock "Turbo Inlet" Pipes
*AshSpec Massive SMIC
*Z1 58mm Throttle Bodies
*Mild Port & Polish Upper Intake Plenum
*Specialty-Z "High Five" Puck Clutch (The lightest clutch made for the Z32)
*RPS Segmented Flywheel
*Z1 Platinum Aluminum 1 piece drive shaft (Might get replaced with a CF DS in the future)
*Blitz SBC ID Boost Controller
*300 Degree Fuel Rails w/Nismo 740cc Injectors
*CZP Fuel Rail Lines (OEM route)
*BDE Engine Mounts
*BDE Intake Cam Gears (un-adjusted)
*Tomei Exhaust Cam Gears (adjusted)
*Unorthodox Racing Crank Pulley
*YB HI Over Drive Water Pump Pulley
*Nissan R34 Skyline Wheels, 18"x9" +30 Offset (19#ea)
*265/35/18 Falken Azenis RT-615 Tires

 

EBC.

anti-lag.

ram-air intake.

you have a n/a diff you really dont need it to spool quicker. its only handy when youre commuting and short shifting at part throttle. otherwise, after 1st its all above 3500/4000rpm and stock turbos are hitting max boost before that.

 

i bet all our cars would be able to hit high 300s low 400s on their dyno's too.
we all know they read a good 15-20% higher than aussie dyno's.

i remember they dyno tested a stock GTR, 550bhp from factory and it pulled 540rwhp or something crazy

 

thanks for all the ideas.

I realise that putting some bigger turbos on would probably be cheaper and much easier. But thats not how i want to go about it.

as for thrashed bottom end. stock tt engine put in 5000kms ago. ran 15psi for bout 1000kms, then set to 12 for bout the same, and its been in safety boost for most of the rest ecu is a generic apexi tune. So its been stock most of its life.

I think ill put on some 750cc's, get nistuned for... Something safe, say 15psi, fit the dual intake, maybe look into water injection. See what that dynoes after the tune.

Antilag ive been reading a bit about. It seems its not good for turbos and the exhaust. Saw a few numbers saying things like theyd last 100kms. Theres a few types out there, but i couldnt find anything obvious thats easy and safe.


So theres no simple way to make the turbos spool sooner and come on faster? i thought there might not be.


I realise more power=bigger turbos=more lag. Which is why im asking how to get more out of the stockies. If they cant be pushed further, i understand. Just wondering.