Stage 2 vs Stock

This setup made – 249.2 HP / 280.7 FtLb

Peak gains of 34 HP and 63 FtLb.

This stage includes all the parts of Stage 1 with the addition of a Downpipe and external wastegated uppipe. We performed a custom tune to 19psi on 91oct.

This stage made 249.2 HP and 280.7 FtLb TQ. We saw a 34 HP or 16% increase in peak power and 63 FtLb or 29% increase in peak torque. We were able to gain 49 HP at 4100rpm tapering to 34 HP increase at 5500rpm. With 93oct you can expect an additional 5-10 hp over 91oct.

*Note – At this stage if you want to run an aftermarket intake combined with an aftermarket downpipe, we recommend installing one of the following parts to help with mechanical boost creep. Mechanical Boost creep can happen in the colder months and we can not tune around it. One option is to let the boost creep happen and install larger fuel injectors and fuel pump, so we do not max out the stock fuel system. Another benefit of upgrading the injectors gives you the ability to run E85/flex fuel in the future. The other options are to install the Stock Intake, install an external wastegated uppipe, or port the internal wastegate on the stock turbo. All of these make it so we can control the boost in the winter months and not max out the stock fuel system. Not doing one of these with aftermarket intake and downpipe will at times have a dangerous lean condition above 6000rpms.

*****Since external wastegates are no longer available and not emissions compliant the only options we can recommend are larger fuel injectors, stock intake, or porting the factor internal wastegate.

Stage 3 vs Stock

This setup made – 299 HP / 353 FtLb

Peak gains of 85 HP and 135 FtLb.

Average gains of 90 HP

This stage includes all the stage 2 mods plus the addition of Injector Dynamics 1050x Fuel Injectors, Cobb Flex Fuel Kit, Cobb Fuel Pressure Sensor Kit, Cobb Fuel Pressure Regulator Kit, and AEM 340lph Fuel Pump. We performed a custom tune to 22psi on E85.

This stage made 299 HP and 353 FtLb TQ. We saw a 85 HP or 40% increase in peak power and 135 FtLb or 62% in peak torque. We picked up about 100 HP in the 3250-5000rpm range tapering down to 80 HP increase at 6500rpm

Blouch 20g Turbo vs Stock

This setup made – 373.8 HP / 374.4 FtLb

Peak gains over stock of 158.9 HP and 156.4 FtLb

Peak gains over stock turbo + E85 of 74.9 HP and 21 FtLb.

The next step after going flex fuel (E85) with the stock turbo is to upgrade the turbo. We have found a 20g is a great option for this. If you have at least 1050cc Fuel Injectors, a 340lph Fuel Pump, and an Upgraded Intercooler you are ready to bolt on a 20g Turbo. After that all you need is a new pro tune. This setup is running 22psi.

This stage made 373.8 HP and 374.4 TQ. We saw a 158.9 HP or 74% increase in peak power and 156.4 FtLb or 72% in peak torque. The stock turbo spools quicker so you make less power until around 3600rpm. Once the 20g spools its game over and you are making 120+ more HP until the 7000rpm redline.

Compared to a stock turbo on E85, we saw a 74.9 HP or 25% increase in peak power and 21 FtLb or 6% increase in peak torque. The 20g power graph has a built motor and allowed for the higher torque. If you have a stock short block we will keep the torque to about 350FtLb to keep the ringlands happy.

A 20g will typically hit full boost (20+psi) by about 4000rpm. This makes it a great option for street driven vehicles as you don’t have massive turbo lag while still being able to make more power than the stock turbo can. We also like the 20g’s because when paired with a stock block we can make good top end power while keeping the midrange around the engines torque limit (about 350ftlb on our dyno).