TUNING THE MITSUBISHI 4G63

A weak actuator let this Mitsubishi 4G63 down on power during this session. Boost kept dropping off significantly, despite a supposedly new FORGE actuator fitted to the car.

The boost control system was not holding the target pressure. A weak spring was causing the wastegate to open too early. This robbed the engine of the power it was capable of making.

We will be back with a stronger spring, preloaded correctly to fight another day. With that sorted, we expect to extract another 20 to 30 horsepower from this solid 4G63. The custom ECU tune is ready and waiting once the hardware issue is resolved.

This is a good example of why every component needs to be in good working order before a tune session. Even small mechanical issues can have a big impact on dyno results.

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Nissan 200SX S13

Fantastic to see DW embracing Steve's talents!

Steve has been mapping my S13 for years now. Like others i had used a well known tuner to set up my power FC and thought it was great at the time until i wanted a remap for some extra boost but wasn''t prepared to pay the 400 odd quid for a complete new map. Steve downloaded the map off my car which turned out to be little more than a base map then remapped the PFC without even needing to touch the boost, the difference was night and day.

Steve always makes sure you know what he's doing and why. He listens to what you want and then goes out of his way to make sure you get it.

My car now runs a rebuilt RB25DET and initial tuning from Steve saw it make 444bhp @ 1.2bar.

I look forward to further tuning in the near future.

Jez

Jez, SXOC

FC TUNING

2018-04-04T19:48:01+00:00

Jez, SXOC

Fantastic to see DW embracing Steve's talents! Steve has been mapping my S13 for years now. Like others i had used a well known tuner to set up my power FC and thought it was great at the time until i wanted a remap for some extra boost but wasn''t prepared to pay the 400 odd quid for a complete new map. Steve downloaded the map off my car which turned out to be little more than a base map then remapped the PFC without even needing to touch the boost, the difference was night and day. Steve always makes sure you know what he's doing and why. He listens to what you want and then goes out of his way to make sure you get it. My car now runs a rebuilt RB25DET and initial tuning from Steve saw it make 444bhp @ 1.2bar. I look forward to further tuning in the near future. Jez

https://fctuning.com/testimonials/nissan-200sx-s13/

Nissan Skyline R34 GTR

Cant stress enough how impressed i was with the service i got from Steve on mapping my RB26 R34.

Took loads of time setting up on the rollers and then came with me to pod and back for a road tweeking sessions that really transformed the power delivery and the fuel economy.

Always at the end of the phone for friendly honest advice.

He really is a mapping Ninja.

Lex

Lex, DWYB

FC TUNING

2018-04-04T19:59:48+00:00

Lex, DWYB

Cant stress enough how impressed i was with the service i got from Steve on mapping my RB26 R34. Took loads of time setting up on the rollers and then came with me to pod and back for a road tweeking sessions that really transformed the power delivery and the fuel economy. Always at the end of the phone for friendly honest advice. He really is a mapping Ninja. Lex

https://fctuning.com/testimonials/nissan-skyline-r34-gtr/

Nissan 200SX S14

Yup, we was road mapping mine to the dyno, at the dyno, and then back after doing a load of other cars. I think we finished tweaking it at about 3am!

It was mapped previously by a \\"well recommended\\" mapper, but it was like a new car after the remap!

3 of my mates have been to him too, and all been very impressed with the dyno results and service!

Ryan, Kent

FC TUNING

2018-04-04T20:00:51+00:00

Ryan, Kent

Yup, we was road mapping mine to the dyno, at the dyno, and then back after doing a load of other cars. I think we finished tweaking it at about 3am! It was mapped previously by a \\"well recommended\\" mapper, but it was like a new car after the remap! 3 of my mates have been to him too, and all been very impressed with the dyno results and service!

https://fctuning.com/testimonials/nissan-200sx-s14/

Nissan 200SX S13

Another very satisfied customer here, transformed the car when the S13 with the waaaayyy to big Ebay super T70 on the RB25DET came on boost on the M25 and then proceeded to spin up the wheels in 4th gear @ 4500 rpm I was WELL impressed !

Next mapping will DEFINATELY be with Steve again (Even if I live 600 miles away in another country)

WJ, Holland

FC TUNING

2018-04-04T20:14:56+00:00

WJ, Holland

Another very satisfied customer here, transformed the car when the S13 with the waaaayyy to big Ebay super T70 on the RB25DET came on boost on the M25 and then proceeded to spin up the wheels in 4th gear @ 4500 rpm I was WELL impressed ! Next mapping will DEFINATELY be with Steve again (Even if I live 600 miles away in another country)

https://fctuning.com/testimonials/4827/

Nissan 200SX S15

Been in touch with Steve for over a year now, and have had nothing but a positive experience....cant praise him enough for his hard work and knowledge. Would recommend him to anyone who wants there car tuned! Cant wait to bring the Silvia back with a few no goodies and see if we can get even more out of it.

Richard Wilson

FC TUNING

2018-04-04T21:11:46+00:00

Richard Wilson

https://fctuning.com/testimonials/nissan-200sx-s15/

FC TUNING