pulley size for Rotrex - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

King Tut · 06-12-2014, 05:51 PM

Quote:

Originally Posted by NonStopTuning

NonStopTuning has offered custom pulleys, in various sizes, since 2005. You send us your pulley, we pull measurements, and build you a custom pulley in any size and/or pattern your project requires.

Good option for JR owners.

glamcem · 06-12-2014, 05:52 PM

to the OP, I was recently discussing this with a friend of mine and he advised me to consider underdrive pulleys to help getting rid of some static loss and get quicker revving as it helps for better downshifting

King Tut · 06-12-2014, 05:52 PM

@sklimo

glamcem · 06-12-2014, 05:53 PM

Quote:

Originally Posted by NonStopTuning

NonStopTuning has offered custom pulleys, in various sizes, since 2005. You send us your pulley, we pull measurements, and build you a custom pulley in any size and/or pattern your project requires.

do you guys offer OEM size and shape lighter crank pulleys as well? shape is also very important since my crank pulley hub adapter that comes with the KW kit needs it

NonStopTuning · 06-12-2014, 05:57 PM

Quote:

Originally Posted by glamcem

do you guys offer OEM size and shape lighter crank pulleys as well? shape is also very important since my crank pulley hub adapter that comes with the KW kit needs it

We can offer any type of custom pulley for any project. Email us if interested and please provide as much info as possible.

Best of luck with all your projects!

dp1 · 06-12-2014, 05:58 PM

Now that we seem to have addressed OP's original question, what would be the smaller sizes (than 110mm) that would work for JR SC safely and without having to change injectors or compromising efficiency near the redline? I wouldn't mind a power band that comes on a little earlier, even at the expense of lowering redline if needed. Anyone looked into this for the JR Rotrex SC or it's already set up exactly where it needs to be and shouldn't be messed with?

CSG David · 06-12-2014, 06:16 PM

Quote:

Originally Posted by dp1

Now that we seem to have addressed OP's original question, what would be the smaller sizes (than 110mm) that would work for JR SC safely and without having to change injectors or compromising efficiency near the redline? I wouldn't mind a power band that comes on a little earlier, even at the expense of lowering redline if needed. Anyone looked into this for the JR Rotrex SC or it's already set up exactly where it needs to be and shouldn't be messed with?

Mmm. No comment.

dp1 · 06-12-2014, 06:48 PM

Quote:

Originally Posted by CSG David

Mmm. No comment.

Silence is deafening...I have to provoke by assuming somebody somewhere is already looking into this

I would not want a smaller pulley unless JR Rotrex and standard injectors could handle it.

Don't need moar powah, just want it to come in a little sooner...

CSG David · 06-12-2014, 09:16 PM

Quote:

Originally Posted by dp1

Silence is deafening...I have to provoke by assuming somebody somewhere is already looking into this

I would not want a smaller pulley unless JR Rotrex and standard injectors could handle it.

Don't need moar powah, just want it to come in a little sooner...

I'm coughing really hard. Must be the onset of another flu.

D K · 06-12-2014, 09:21 PM

Quote:

Originally Posted by CSG David

How do you machine a smaller pulley to become a larger pulley?

3D printer.

D K · 06-12-2014, 09:26 PM

Quote:

Originally Posted by dp1

unless JR Rotrex and standard injectors could handle it.

Don't need moar powah, just want it to come in a little sooner...

So how much COULD the stock inj. handle?

Have you figured that out yet?

D

dp1 · 06-12-2014, 09:37 PM

Quote:

Originally Posted by D K

So how much COULD the stock inj. handle?

Have you figured that out yet?

D

I am not an expert but I got an impression from past reads that bigger injectors are needed around 300whp+, maybe a little less.

I'm on stock injectors at 270whp/200lbft and 11 AFR near redline based on P3 gauge with JR SC + P&L (two hi flow cats) + 2.5" Perrin, and I don't need more for street or track fun.

dp1 · 06-12-2014, 09:41 PM

Quote:

Originally Posted by CSG David

I'm coughing really hard. Must be the onset of another flu.

I will send flu medicine immediately, mixed in with the must-reveal-truth serum 8)

D K · 06-12-2014, 09:48 PM

Quote:

Originally Posted by dp1

I am not an expert but I got an impression from past reads that bigger injectors are needed around 300whp+, maybe a little less.

I'm on stock injectors at 270whp/200lbft and 11 AFR near redline based on P3 gauge with JR SC + P&L (two hi flow cats) + 2.5" Perrin, and I don't need more for street or track fun.

You've logged your idc obviously?

06-12-2014, 05:52 PM	#16
glamcem Senior Member Join Date: Oct 2013 Drives: 2022 BRZ Limited Location: Orange County Posts: 1,553 Thanks: 997 Thanked 607 Times in 404 Posts Mentioned: 32 Post(s) Tagged: 1 Thread(s)	to the OP, I was recently discussing this with a friend of mine and he advised me to consider underdrive pulleys to help getting rid of some static loss and get quicker revving as it helps for better downshifting __________________ 2022 BRZ Track Build (A New Chapter)

06-12-2014, 05:52 PM	#17
King Tut NASA SpecE30 Racer Join Date: May 2012 Drives: 2006 Honda S2000 Location: Gulf Breeze, FL Posts: 7,279 Thanks: 607 Thanked 5,759 Times in 3,055 Posts Mentioned: 274 Post(s) Tagged: 10 Thread(s)	@sklimo __________________ - King Tut Street/Track Car: 2006 Honda S2000 TT3 \|\| Race Car: 1987 BMW 325is SpecE30 \|\| Tow Vehicle: 2014 RAM 1500 EcoDiesel Sold Cars: 2012 BMW M3 \|\| 2013 Subaru BRZ \|\| 2012 Porsche Cayman R \|\| 2009 Chevrolet Z06 \|\| 2009 BMW M3 \|\| 2004 BMW M3 \|\| 2004 Nissan 350Z

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06-12-2014, 05:58 PM	#20
dp1 driving smoother faster Join Date: Jul 2013 Drives: Sold Location: Some Posts: 990 Thanks: 630 Thanked 471 Times in 286 Posts Mentioned: 19 Post(s) Tagged: 0 Thread(s)	Now that we seem to have addressed OP's original question, what would be the smaller sizes (than 110mm) that would work for JR SC safely and without having to change injectors or compromising efficiency near the redline? I wouldn't mind a power band that comes on a little earlier, even at the expense of lowering redline if needed. Anyone looked into this for the JR Rotrex SC or it's already set up exactly where it needs to be and shouldn't be messed with?

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