Comparison between Stock and rebuilt
STAGE 3 - assembled
CT20 2JZ SUPRA/ ARISTO TWIN
TURBO HIGH FLOW JDM
THESE HIGH FlOWS CAN BE OBTAINED THROUGH THE EXCHANGE SYSTEM
HOW IT WORKS IS ON THIS PAGE.....EXCHANGE SYSTEM
There are many flaws and restrictions in the JDM ct20 twin turbo system which are the ceramic exhaust
that areprone to break apart after increased boost is
demanded from the turbo or from old age. There is also the
which are undersize for most power outputs wanted. With the
increase in these
two on the turbo alone, boost creep is now
the problem, as the boost control is only done on one
flap between the two turbo's.
The best method of retaining the sequential operation of the
Twin turbo's of the 2jz engine
and also keeping the factory appearance and
having performance to match a single turbo setup, if
that is the requirement, is to High Flow the Factory CT20 turbochargers. This can be done with a
very cost effective way that has been developed to get the most flow from the system by improving
the flow in the restricting areas of the CT20 twin turbo design.
Upgrades (supporting mods) which go with the
twin turbo high flows are
larger exhaust system, bigger
intercooler and fuel injection modifications.
Higher upgrade methods
available (below) are ported exhaust
manifold,high flow turbo,Ported wastegate and dual intake pipes.
All high flows suitable for sequentail operation.
Here are the options for exchange and there prices - AUST $
Rebuild standard CT20 twin
STAGE 1...................$1050 total
Steel CT20 turbine wheels.(INCONEL)
Fully overhauled including kit (new seals,o-rings,bearings)
Fully cleaned and dressed to appear"new"
Fully balanced including core balancing and speed testing.
STAGE 2.............................$1350 total
Fully overhauled (as above)
46.5mm compressor wheel
Steel turbine wheels cropped (inconel)
Ported wastegate hole.
This high flow will not control boost well and will spike and overboost on the stock wastegate but suitable for someone wanting to customize thier own system as in fitting their own remote wategate and/or custom manifold. It still has very restrictive turbine housings but very good value.
High Flow with wastegate improvements -
STAGE 3.......$1650 total
Overhaulled and high flowed as above with 46.5 mm Compressor wheels
cropped inconel turbine
Enlarged wastegate valve(32mm) and large can heavy duty
actuator (ct26) for better valve opening at lower boost
Controls boost well from 14psi.
Approximate output rating 280rwkw - 320rwkw
(Based on 20-25 psi with a stock engine (unopened),with supporting mods and an average reading dyno)
Very good value for this highflow and simple to fit and tune the sequential system to reduce the "dip" between the first and second turbo. Still has restrictions in the turbine housings, intakes and manifold.
HIGH FLOW WITH PORTED MANIFOLD, "Y" PIECE
and DUAL INTAKES -
Details here about the stage 4 high flows
This link(above) has the explainations of why the modifications are done and some instructions and information on the 2JZGTE CT20 twin turbo high flows.
-High flowed twin CT20 turbo's with 48mm billet compressors.
-Steel Cropped Turbine wheels (as above).
-Ported turbine housings
-large waste gate hole 32mm and flap 37mm
-large can actuator (ct26)and heavy spring ( control from 14-40psi)
-Ported exhaust manifold (75% more flow).
-Fabricated high flow exhaust "Y" piece with mount for sensor.
-Machined out EGCV Assembly
-Fabricated DUAL INTAKES Purge welded and ceramic coated. (pictured left)
-Also come with gaskets for turbo water jackets and oil feed/drains and intake bracket and bolts.
-Supplied with instructions for intake fitment and sequential tuning.
This High flow can exceed 500RWHP on a stock engine (needs ECU, increased fuel supply, modifications to the sequencial system and very good flowing exhaust system)
All the major restrictions are delt with that are within a reasonable labour costing and still allowing top class performance. Boost is controlable from 14 to 40psi.
Dual intake fitted with the basic filter pods.
(pods and silicon hoses are not supplied)
STAGE 5 CT20 HIGH FLOW....Coming soon
This level is in development and will be designed for 600-700 rwhp to the absolute limit of the turbine housings. Still retaining the sequential operation and looking stock with all the stock oil and water lines still resuable as stock.
Price not detirmined yet.