Get 400bhp in a Subaru STI ... WITHOUT ruining it !! | Fastline VF400 in action 

Stick around to the end to see exactly how hard I was finding it to talk to the camera in the artic conditions 😂

Really enjoying the videos, keep them coming. 👍

Great video and love Richard and his car !!! Sick

Excellent video Duncan

Bloopers mind blank when in front of the camera 😂 keep the vids coming Duncan 👍

🤣😂🤣🤣 love the long looks into the camera 😵‍💫😵‍💫😵‍💫 keep them coming lol

Great video as always. Love the bloopers.

Awesome stuff I have a built 2.1l jdm hatch that vf400 is a nice option my 95ron fuel would probably hold it back though

If only this video came out 2 weeks before it did. Next turbo... Thanks for sharing.

The bloopers summarise nicely why I don't talk to the camera... except for work webinar purposes 😂

Love the videos. Do you do e tunes? I have a Forester STI JDM with lots of mods. Look forward to a reply

How I made a daily driven reliable 500whp in a STi just like the one in this video: 1.Built EJ257 closed deck block from OutFront motorsports 2. Nitride salt bath crank, Manley rods, CP pistons 9:1 3. *ALL FASTENERS ARE ARP* 4. Brian Crower forged valves, valve springs, titanium retainers 5. OEM camshafts 6. NGK one step colder plugs 7. IAG TGV deletes 8. IAG V3 AOS system 9. IAG PTFE multi fuel line kit AND IAG fuel rails 10. AeroMotive FPR 11. Injector Dynamics 1300cc multi fuel type injectors (moving to 1700's this summer) 12. Grimspeed 3 port boost control 13. Process West top mount intercooler with matching hood shroud 14. Cobb engine management (switching to Haltech this summer) 15. Cobb E85 fuel system 16. Koyo aluminum radiator 17. OEM radiator fans (they push more air than aftermarket) 18. Cobb SP short intake 19. Tomei equal length manifold 20. Tomei up pipe 21. Forced Performance blue turbo 22. Invidia 3 inch catless downpipe 23. Invidia 3 inch titanium exhaust system with titanium muffler 24. Tuned to utilize 91 - 93 octane pump gas or straight E85 by MoBetta tuning. Pump gas tune: 370whp......E85 tune: 500whp My turbo is still in the prime range of boost power and not being overworked. My injectors are at 90 percent duty cycle which is why I'm moving to 1700's to have a more comfortable range.

making me want 400+ now lol

Dying to bring the RB320 back to you D I've chopped and changed so many parts since it was last there ! PS did you get any software for the Final edition wrx sti yet ? Like flat shifting and launch control...

Great video. Always toyed with getting a turbo for my 05 sti (widetrack UK PPP Car). I installed a fresh 340lph fuel pump, PFR7B plugs and have a 3 port solenoid awaiting fitting. What else would I need other than the turbo for 400bhp with the vf400?

Hi Duncan, thanks for mapping my Impreza back in May. Would I need bigger injectors than the yellow 440cc side feeds on my MY98 GC8 JDM WRX Impreza to get to 400bhp with a Fastline turbo? Currently mapped at 338bhp with larger top mount intercooler, 255lph fuel pump, decat exhaust, Mafless K&N air filter, VF22 turbo. Also is a fuel pressure regulator required as well? Thanks.

Can we do a video on mapping for a turbo change.?

Hi, may I ask, if I were to to my K&N open pod air filter to some other brand open pod (from 6 inch to 4 inch maybe), do I actually need a retune on it?

Is there a way to make the jdm have the burble noice rather than like an evo? Without loosening power etc

I have a 2004 JDM Impreza Sti and looking to get this turbo, would it need any fueling upgrades, like injectors, pressure reg or fuel pump?

what would you recommend for a blobeye wrx? I've a straight line exhaust with toyo catback. I was looking to get this vf400 but I assume I might have to open up the engine. what would you recommend as an upgrade in order to fit this turbo

Hey bro, i have a Hawkeye version 9 jdm sti, are the stock internals safe with this turbo? What’s the hp limit on these ej207s?

Wish I could get that much power 1050 injectors 3” exhaust 207 engine Number 4 cooling mod Bigger sump Gt pump 3.5 turbo E 85 About 350 hp

Would you say for a uk ej257 I’d need to forge internals to go near 400?

I have just bought a stock JDM Forester sti type m. I think it's totally stock. What work would I have to do to achieve the 400 bhp range. I'm guessing it's not just the turbo. Would I have to have forge work done or would it be reliable/safe without that kind of work too?

How do your Dyno Dynamics numbers compare to Dynojet and/or Mustang from the US?

Have you had an experience with the RCM turbos?

Forester, 407.5hp on a top mount intercooler, is this possible on a sti tmic?

How does it compare to vf48 hf ?

601 whp stock block 🤷🏽‍♂️

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in the description, you say laggy, are we speaking about 2.0 L engines or 2.5 ? @racedynamix