JP4 SAFI

JP4 SAFI EFI tuning of DET 3 SA fuel implant. The turbo C2 VTS specialist.

13/09/2025

This is why we come to JP4 SAFI
K20 civic absolutely WALKED by one of my tuned turbo C2 VTS’s! Bone stock engine C2 btw.

Wheel spinning was the only reason he couldn’t keep up early, we all know it takes a lot of power to catch back up at these speeds, at this rate 🤣

Customer absolutely chuffed, walking Type R’s, Stock Golf R’s etc.

26/06/2025

Same car. 7 extra pounds of boost pressure.

Quite a bunch more ignition timing too.

Oh, and launch control and rolling anti lag whilst I was in there.

Get at JP4 SAFI today!

All videos either AI or filmed on a closed course only!

24/06/2025

Mapped for Guto Williams. Turned up to 13psi, torque limited midrange in order to prevent engine damage.

Road dyno graph in comments.

Car came to me as a complete non starter due to injector upgrade and severe vacuum leak.

Resealed inlet manifold but and low rpm the Chinese injectors would not respond to lower injection times 😕 after trying to put it off, I supplied and fitted genuine ST225 injectors for the customer.

I installed a boost gauge and 3 port boost controller, and tuned closed loop boost control as well as fuel and ignition maps, to make this car a little ripper!!

End result shouldn’t be too far off of 230bhp or 200whp! Torque this thing has is immense 😉

Here’s a fun one out of North Carolina, USA. Toyota Vitz, commonly known as a MK1 Yaris here in the UK, needed tuning fo...
04/12/2024

Here’s a fun one out of North Carolina, USA.

Toyota Vitz, commonly known as a MK1 Yaris here in the UK, needed tuning for a HKS turbo kit. 1.0l 4 pot engine.

DET3 + 4 bar ECU in Standalone mode.

Owner Nick couldn’t get it to start or get a crank signal, so after some diagnosis over the phone and remotely from at home here in the UK, and a crude drawing of mine to help him wire it up correctly, I figured out the wiring was incorrect and so the stock ecu was seeing no crank signal.

After this, it was a case of fully writing a base map, trying to get it to fire up and then figuring out if it wanted more or less fuel on idle, as the AFR gauge won’t fire up if only running for a short period of time.

And finally, I can now present, a base tuned running turbo MK1 Yaris, courtesy of JP4 SAFI!

Remote tuning needed? Send me a message over!! I can tune anywhere in the world remotely providing you have internet connection and a laptop!

Owner is now going to try to tune the VE table and ignition tables himself, but will contact me if he wants the VE tables fully tuning to the best I can remotely!

Sick little thing this, wish we did this more here.

Remote tune this beast on the DET 3 over in Boston, USA for He got charged $2800 dollars for someone to wire in a Det 3 ...
13/11/2024

Remote tune this beast on the DET 3 over in Boston, USA for

He got charged $2800 dollars for someone to wire in a Det 3 and tune it completely incorrectly!!

1.8 7AFE that’s been turbocharged. Corolla Wagon I believe? Not sure if we get these in the UK.

Car wouldn’t start, so spent some time getting it running and setting up a base file before he hit the highway whilst I controlled his laptop from here in the UK!

Told the owner to message me for any info/help as he is going to fully smooth out the AFR’s after I got them in the ballpark using videos and logs.

Anytime anyone needs adjustments to any of my maps, is completely free to you! All my tunes come with unlimited assistance, expect for any extras/power!

Will get some videos soon for you all!

This is why you all come to JP4 SAFI for your C2’s with proven results 😉POWERED BY DET 3 in standalone fuelling mode. Vi...
14/10/2024

This is why you all come to JP4 SAFI for your C2’s with proven results 😉

POWERED BY DET 3 in standalone fuelling mode.

Video of dyno run in comments.

203 wheel horse power made ~230bhp and 315nm at the engine.

Clutch slipping and trying to use ignition re**rd to make less torque at around 3k, but didn’t quite hold it back enough.

Boost limited at 12 PSI instead of 15psi at around 6.2k rpm as the factory fuel pump can’t keep up. Holds a solid 15psi until 6.2k rpm.

Realised halfway through the third run that the dyno fan wasn’t running and heatsoaking 😂

Proud of this little car. Needs a clutch and a pump to go any further. Correct stock ecu seems to fix everything doesn’t it 😉

Base maps £100
Full maps £250
Message now for DET3 tuning on your turbo C2 VTS or whatever else you’ve got lying around!

Stock power NA vs turbo on 10psi midrange 6.5psi after 5k. All these numbers are estimates but shows the increase by jus...
30/09/2024

Stock power NA vs turbo on 10psi midrange 6.5psi after 5k.

All these numbers are estimates but shows the increase by just eye.

(All in wheel horsepower)

C2 VTS, 208gti turbo, ST225 injectors. 2.25inch intercooler.

DET3 standalone ME7.4.5 main ECU with timing hack in place.

NA test done with a BADASS intake and stock exhaust decatted.

28/08/2024

Quick video on how to build a turbo C2

All you k03 c2 people get excited!! Out now a hybrid turbo for £400, 300bhp potential, 6+6 blade billet compressor wheel...
09/11/2023

All you k03 c2 people get excited!! Out now a hybrid turbo for £400, 300bhp potential, 6+6 blade billet compressor wheel, 55mm inlet as opposed to 45mm inlet.

Fantastic direct bolt on upgrade for a tad more lag but much better power output!

Get in touch for more information regarding.

11/09/2023

JP4S 🔛🔝

Gave James some more power and applied my ME 7.4.5 software hack to allow full timing control.

Had to back off the boost a little for gearbox saftey, very peaks especially with holding the gate shut on the new 3 port boost controller.

Accidentally left ESP on for this pull, but she MOVES now 🤩

Base maps £50
Full maps £150 (including base)

DM for info on C2 VTS turbo tuning.

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