I got this setup and currently braking 598.8hp. The heads are all oem. This winter I'm going to rebuild heads and do what's needed to make much power

I know I need twin walbro setup, Cosworth plenum, bigger injectors, probably +1mm exhaust valves, new camshafts, valve springs and rebuilding/moving valve seats and porting. Guess I need a better clutch and stage2 drive shafts too.

What's the most power can w/ the Greddy twins hold?

What else? What brands do you suggest?

Hoping for help from you VQ35DE gurus

Greddy twins (TD05 18G) w/ Intercooler
CP Pistons Inc 8.5:1
Eagle rods
ARP L19 Head studs
ARP main studs
Cosworth Head gaskets
stage 2 Fuel Return System AAM
RC Engineering 750cc Injectors
Plenum Kinetix SSV Extreme Flow Manifold
AAM Spec. Walbro 255Lph Fuel pump
Throttle Body Spacer
HKS SSQV BOV
AAM Turbo Oil Return Line Kit
AAM Spec Oil Pan Spacer
SETRAB oil cooler
Koyo race radiator
Evans NPG+
Haltech Platium PNP standalone
ATI superdamper
Injected performance solid motor mounts

3" downpipes
Greddy EvoTT exhausts

Manual OEM gearbox
Southbend clutch Stage 5
JWT flywheel
Nismo Bearing - Needle Pilot
Driveshaft shop stage1 axels

 

Don't waste your money upgrading the heads for minimal flow gains. The stock VQ35 heads flow FANTASTIC (better than many upgraded 2JZ heads). Add an intake manifold and cams and you should see very good gains. Past that I'd upgrade the turbos well before I'd ever touch the heads.

 

As far as axels go, you may as well go straight to stage 5 if you are upgrading.

I like headwork, but BriGuy has a valid point, get cams first for sure. My head specialist doesn't think the +1mm valves are worth the $$$$, just have the valve bowls blended to increase flow.

The dual pumps will most likely be needed and you should seriously consider a meth setup as well.

Good Luck

 

thanx!
my friend is fantastic porting specialist and we'll see what he think can be done.
what upgrades for turbos is the best bang for the buck?
yeah, meth setup or water injection, need to learn more about that.

keep coming w/ inputs

 

can go to the greddy 20g's, for your setup.

What power you shooting for and on what fuel level?

tom

 

I'm shooting for as high as possible, on pump gas. But I want a smooth dyno / good response for track.

 

^^^ +1

There are a lot of cam choices. The right cam selection will depend on the maximum rpm you will be running at and your power goals.

JWT cams tend to offer the most lift for a given duration, and thus better flow, but you should not push them past about 7500 rpm or so. I won't be pushing my rpms past 7500, so I will be using the JWT C8 cams on my new build.

GTM and BC cams do not offer as much lift, so those will not flow as much for a given duration, but they can be used to higher rpm. I'm guessing to about 8200 rpm (maybe even as high as 8500 rpm?), but this is mere speculation on my part.

If anyone is pushing these cams to higher rpms without valve float, please chime in.

 

Thanx, I love your words like a thirsty in the dessert
I'm really weak for screaming engines So besides high numbers i love as much rpm as is safe w/o scarifying the response.
I've also heard that some injectors (like RC) gives a rather bad fuel injecion, so what's the best chose here? Is low ohm ones like HKS to prefere?
Please give me more, tell me all you know

 

Get the HKS injectors......nothing better IMO

What whp are you looking for??? Under 700??.....the Greddy kit you have will get you there

 

I'm hoping for more than 700, but I don't know what I need to take me there ocr if turbo lag will block the the way

 

Alberto is the man you should consult about maxxing out your Greddy setup. I don't think anyone on here is making more power with a standard Greddy 18G kit than him.

He is using BC stage 3 cams on stock heads and meth injection on his setup. He is making above 700whp on his 18G turbos.

 

Thanx
So what I need is
stage 5 or pro level axels
cosworth intake
hks injectors?
cams, bc stage 3
Valve springs, some brand?
Twin pump holder, c j motorsports?
Meth injector kit, aquamist?

I still think I need to rebuild/swap valves/seats since my egt gets high, don't you guys got that problem?

 

Deatschwerks has some fantastic injectors that will work with your factory injector harness and are not too expensive.

I think I would buy whatever valvesprings and retainers are recommended by manufacturer of the cams you choose.

CJM fuel system stuff is the best...

There is a huge selection of meth kits out there. Alkycontrol seems to me to be the best bang for your buck for a progressive setup.

 

Thanx! This kind of words it what I need to hear

 

Low impedance (peak and hold) injectors are supposed to respond a little faster than high impedance (saturated) injectors.

Some people love RC injectors, some don't. I've never heard anything but positive comments about HKS or DW injectors.

 

^thanx for input
Please post what you got so I can build a monster here in Sweden

btw Import Turner Magazine and a Autralian mag; Auto Salon wants to publish my car as it is.

 

in for some pics then!

 

here's some on one community forum here in sweden
http://www.garaget.org/?car=48186
the sound system is just for show

and some videos http://www.garaget.org/?car=48186&videos

 

Not a fan of the body kit but a big fan of the blonde.

 

+1