Stage 1+ E85 vs Stock

This setup made – 289.4 HP / 351 FtLb

Peak Gains of 65 HP and 132 FtLb

For this comparison, we drained the 93oct out, put in E85, and installed the Cobb NexGen Flex Fuel Kit and DeatschWerks 340lph Fuel Pump.This stage we made an even more impressive 289.4 HP and 351 FtLb on our dyno. We saw a 65 HP or 28% increase in peak HP and 132 FtLb or 60% gain in TQ over stock. We were able to make 80+ HP over stock from 3200rpm to 5000rpm. For comparison, this is almost exactly the same power our STG 3 STI made and all you need is an Accessport, Flex Fuel Kit, and a Tune.

If you dont want to commit to flex you can always go with a E40 blend Tune. E40 is an easy way to run ethanol; you just put a 50:50 mix of E85 and 91/93 when you refuel. Even with varying ethanol content at the pumps of 60-85% you will always end up with the fueling being within + or – 3%. Since the 2022+ WRX is full time closed loop it will correct the fueling even under full throttle so it’s always spot on.

Stage 2 vs Stock

This setup made – 274.7 HP / 324.0 FtLb

Peak Gains of 50 HP and 100 FtLb

These are the typical results you can expect when you have an Intake, Top Mount/Front  Intercooler, (optional) Charge Pipe, and with or without a Catback Typical boost levels are 18-20psi. The graph below is tuned to 20psi on 91oct fuel.

You can expect around 50HP or 22% increase in Peak Power and 100FtLb or 50% increase in Peak Torque over stock. These mods help you make more power throughout the entire power range.

Stage 2+ E85 vs Stock

This setup made – 320.0 HP / 348.4 FtLb

Peak Gains of 95 HP and 129 FtLb

These are the typical results you can expect when you have an Intake, Top Mount/Front  Intercooler, (optional) Charge Pipe, DeatschWerks 340lph Fuel Pump , and Cobb NexGen Flex Fuel Kit with or without a Catback running E85. Typical boost levels are 18-20psi. The graph below is tuned to 20psi on E85 fuel.

The graph below is making in impressive 95HP or 42% more Peak Power and 129FtLb or 59% more Torque than stock.

With E85 you can expect 14-17% more HP and 8-14% more Torque with no other changes but a tune. The graph below illustrates that by showing 45HP or 17% in peak power and 24FtLb or 8% increase in peak Torque.  From about 3800rpm and up power is able to hold much better increasing to that 45hp gain by around 5500rpm.

With E85 we limit the torque to around 350ftlbs to keep the stock trans happy. This is the same torque level we have been tuning the the 2006-2014 WRX  stock trans to for years with good success.

If you dont want to commit to flex you can always go with a E40 blend Tune. E40 is an easy way to run ethanol; you just put a 50:50 mix of E85 and 91/93 when you refuel. Even with varying ethanol content at the pumps of 60-85% you will always end up with the fueling being within + or – 3%. Since the 2022+ WRX is full time closed loop it will correct the fueling even under full throttle so it’s always spot on.

Blouch 5056 XT Turbo vs Stock

This setup made – 357.3 HP / 378.8 FtLb

Peak gains over stock of 132 HP and 159.5 FtLb

Peak gains over stock turbo + E85 of 37.3 HP and 30 FtLb.

With all of the mods from STG 2  the next step is to upgrade the turbo. At this power level you may want to upgrade the factory J-Pipe to a highflow unit. This turbo WILL max out the stock fuel system on E85. In order to make this power so you will need to upgrade to the IAG Fuel Injectors and HPFP. There is the potential to make a little more power on the top end with the upgraded fuel system but we are finding the the upgraded HPFP is pretty much maxed out for flow in the 4000rpm area.

This stage made 357.3 HP and 378.8 FtLb TQ. We saw a 132 HP or 59% increase in peak power and 159.5 FtLb or 73% in peak torque. This turbo maintains the factory Electronic Wastegate and BPV which helps keep the spool up is very similar to the stock turbo. With a stock transmission, torque would be the same until around 4250rpm. From 4250rpm on up the Blouch takes over and keeps making more power all the way to 6500rpm. The 5056 XT power graph has a STI 6 Speed Transmission and allowed for the higher torque. If you have a stock transmission we will keep the torque to about 350FtLb to keep the gears happy. This setup is running 21psi tapering down to 18psi by redline.

Compared to a stock turbo on E85, we saw a 37.3 HP or 12% increase in peak power and 30 FtLb or 9% increase in peak torque.

If you dont want to commit to flex you can always go with a E40 blend Tune. E40 is an easy way to run ethanol; you just put a 50:50 mix of E85 and 91/93 when you refuel. Even with varying ethanol content at the pumps of 60-85% you will always end up with the fueling being within + or – 3%. Since the 2022+ WRX is full time closed loop it will correct the fueling even under full throttle so it’s always spot on.