Retune needed for pulley change? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Deep Six · 11-02-2017, 02:51 PM

Currently running a JR C30 supercharger with the higher boost 100mm pulley and flex fuel tune. Going to replace the 100mm pulley with the 90mm version they now offer. Other than lowering the rev limiter to avoid over spinning the compressor, does the tune itself need to be modified?

Summerwolf · 11-02-2017, 03:22 PM

You're going to be pushing more boost so.....

pgranberg11 · 11-02-2017, 04:12 PM

Quote:

Originally Posted by Deep Six

Currently running a JR C30 supercharger with the higher boost 100mm pulley and flex fuel tune. Going to replace the 100mm pulley with the 90mm version they now offer. Other than lowering the rev limiter to avoid over spinning the compressor, does the tune itself need to be modified?

yes

JazzleSAURUS · 11-02-2017, 04:21 PM

Any significant changes to the induction or exhaust require a proper tune to function CORRECTLY. Plenty of people toss on a header 'due to because subaru sounds' without tuning, and wonder why they have a CEL and their car isn't any faster.

But since you're asking questions like this, and you've managed to already install a supercharger kit and flex fuel, I suggest starting here: http://www.ft86club.com/forums/showthread.php?t=81493

It's a good read to remind yourself of some of the basics that can be easy to forget once you're past a few of the 'honeymoon mods'.

Kodename47 · 11-02-2017, 06:38 PM

Depends on whether the tune is done with the headroom for more airflow. It may need one, it may not.

Deep Six · 11-03-2017, 07:55 AM

Spoke with James yesterday and it's just some minor alterations needed. We will do some street tuning together once I have the new pulley installed. helps that we live in the same town.

JazzleSAURUS · 11-03-2017, 09:39 AM

Quote:

Originally Posted by Deep Six

Spoke with James yesterday and it's just some minor alterations needed. We will do some street tuning together once I have the new pulley installed. helps that we live in the same town.

Perfect, that's the correct course of action!

Most tuners will make minor map adjustments for very little. Some even free depending on the changes and your requirements.

11-02-2017, 02:51 PM	#1
Deep Six Senior Member Join Date: May 2013 Drives: 2013 FRS / 2013 427 Vert Location: Orlando Posts: 611 Thanks: 212 Thanked 328 Times in 197 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Retune needed for pulley change? Currently running a JR C30 supercharger with the higher boost 100mm pulley and flex fuel tune. Going to replace the 100mm pulley with the 90mm version they now offer. Other than lowering the rev limiter to avoid over spinning the compressor, does the tune itself need to be modified? __________________ [SIGPIC][/SIGPIC] 2013 FR-S Asphalt BC Coils/Rev Works UEL header/HKS Front Pipe/Racing Brake BBK/Shorai LW Battery/ACT 6 Puck Clutch/FBM Radiator & Oil Pan/JR Oil Cooler/Jackson Racing High Boost C30/Rev Works Built Motor 2016 Audi TTS APR Tuned

11-02-2017, 04:21 PM	#4
JazzleSAURUS Senior Member Join Date: May 2015 Drives: 15 BRZ LTD, 05 FXT Location: Western MA Posts: 1,032 Thanks: 561 Thanked 558 Times in 351 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Any significant changes to the induction or exhaust require a proper tune to function CORRECTLY. Plenty of people toss on a header 'due to because subaru sounds' without tuning, and wonder why they have a CEL and their car isn't any faster. But since you're asking questions like this, and you've managed to already install a supercharger kit and flex fuel, I suggest starting here: http://www.ft86club.com/forums/showthread.php?t=81493 It's a good read to remind yourself of some of the basics that can be easy to forget once you're past a few of the 'honeymoon mods'. __________________ SOLD: 2015 WRB BRZ Limited ('02 WRX BBS, S-04's, Stoptech Sport pads, MXP SP, AVO drop in filter, Mishimoto Intake tube, decatted header, OFT 93 Stage 2 EL Tune, Kartboy rear shifter bushing, Whiteline transmission and subframe lockout bushings, ST Coilovers, SPC Camber bolts w/smaller crash bolt, SPC LCA's & SPC Toe Arm bushings, Red TOMs, TRD Wing.)

11-02-2017, 06:38 PM	#5
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,629 Times in 1,112 Posts Mentioned: 155 Post(s) Tagged: 1 Thread(s)	Depends on whether the tune is done with the headroom for more airflow. It may need one, it may not. __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

11-03-2017, 07:55 AM	#6
Deep Six Senior Member Join Date: May 2013 Drives: 2013 FRS / 2013 427 Vert Location: Orlando Posts: 611 Thanks: 212 Thanked 328 Times in 197 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Spoke with James yesterday and it's just some minor alterations needed. We will do some street tuning together once I have the new pulley installed. helps that we live in the same town. __________________ [SIGPIC][/SIGPIC] 2013 FR-S Asphalt BC Coils/Rev Works UEL header/HKS Front Pipe/Racing Brake BBK/Shorai LW Battery/ACT 6 Puck Clutch/FBM Radiator & Oil Pan/JR Oil Cooler/Jackson Racing High Boost C30/Rev Works Built Motor 2016 Audi TTS APR Tuned

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11-02-2017, 03:22 PM	#2
Summerwolf Panda Trueno Join Date: Jan 2015 Drives: No twin now. Location: North Indiana Posts: 3,347 Thanks: 2,113 Thanked 2,407 Times in 1,332 Posts Mentioned: 17 Post(s) Tagged: 2 Thread(s)	You're going to be pushing more boost so.....

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