Description
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For those looking to step away from a factory sized turbo, this is a bolt on 20G turbo kit . This kit is designed to be equivalent to OEM in terms of longevity, with all oil and water lines made from 16ga 304 stainless – no braided lines here! All installation hardware is included. A modified ‘R’ manifold is included in the base price – a Japanifold can be used instead if you provide the manifold.
The primary limiting factor for any stock frame turbo (TD04HL or KKK24) is the turbine housing and turbine wheel. ‘Hybridizing’ a stock turbo by increasing the size of the compressor wheel provides an increase in peak horsepower, but minimally increases power at high RPM and total power ‘under the curve’. This is due to choked exhaust flow due to the small turbine wheel and turbine housing. Increasing the boost level to try and increase power only serves to increase exhaust gas back pressure, putting more stress on the engine. By switching to a larger turbine wheel and turbine housing you allow the motor to make more horsepower more easily. On top of that, ‘hybrid’ turbos can be more failure prone due to a greater amount of stress than what the small shaft size of a stock turbo was designed to handle.
This 20G turbo kit comes with a ‘RB26’ style 6 bolt outlet with an internal wastegate. This turbine housing allows for unrestricted wastegate flow into the main exhaust stream. A stainless steel 6 bolt turbine housing to 3″ v-band adapter flange is pre-installed. A competent exhaust shop can modify your existing 3″ downpipe to fit, or a downpipe can be purchased. If a downpipe is purchased, it comes with a v-band flange exit and a matching v-band flange to weld to your current exhaust.
The turbo inlet is 2.4″ – the same as stock, so your current pre-turbo intake tube can be re-used. The turbo’s compressor outlet is in the same position as stock, so your current over the engine (OTE) pipe can be reused.
Just like the stock TD04HL turbo, there is a 3 bolt compressor bypass mount on the compressor cover. You can re-use your current CBV, or we can supply the turbo with a piston style CBV and upgraded spring.
A billet adjustable wastegate actuator is included with every kit. The optimal wastegate spring and pre-load is pre-configured.
While an entirely stock whiteblock engine can handle the maximum power output from this kit, the connecting rods will be operating on thin ice. We do have a few customers with stock bottom ends running 25psi on E85. However, for reliability’s sake, we recommend that you at least upgrade your connecting rods.
The kit can be provided with a Japanifold or an ‘R’ manifold. A Japanifold is recommended, as it flows significantly better than the ‘R’ manifold. You can read more about manifold types here: https://www.vasttuning.com/exhaust-manifold-types/
Included in the kit:
- 20G Turbo with 10cm TD05H 5 + 5 Staggered Height Turbine Wheel
- Adjustable wastegate actuator pre-configured with appropriate spring and pre-load
- 304 stainless steel oil and water lines
- Japanifold or ‘R’ Manifold modified with CNC’d stainless T3 adapter flange
- Single piece exhaust manifold gasket
- Nord lock washers for turbo studs
- All other installation hardware necessary
Turbo details:
20G compressor wheel, TD05H turbine wheel, 10cm housing – 430WHP – 20psi by ~3900RPM
52.6mm/68mm 6 + 6 billet compressor wheel
54.1mm/61.5mm 5 + 5 blade turbine wheel
A 15% tune discount is offered to anyone who purchases a turbo kit and tune at the same time
These kits are custom made to order. Lead time from order placement to shipment is usually 2-3 weeks. We have jigs for the FWD P80 and P2 downpipe. We are currently working on jigs for the AWD P80 and P2, so they will take additional time to make.
