Cosworth Supercharger Owners Thread - Page 16 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Matt@Cosworth · 01-02-2016, 11:40 AM

Quote:

Originally Posted by ajc209

At least with the sc its quicker than the average diesel exec.

I have to admit, 330hp seems a bit low if im going to the effort and expense of adding uprated internals though.

No hope of a pulley kit offering the full power the sc is capable of?

Sent from my GT-I9300 using Tapatalk

we'll see, the main scene is that you will need to go to 8 ribs to be able to drive it a max speed under load

weederr33 · 01-02-2016, 05:27 PM

So to truly bring out this supercharger, you'd need a pulley kit for the entire engine or just the crank pulley? Would that effect the engine in any negative ways? As well, there have been many debates on the harmonic dampener that the stock crank pulley is (supposedly). Would you guys address this as well?

Matt@Cosworth · 01-03-2016, 04:46 AM

there's a few options
1) just 10% smaller pulley on the SC nose - no other changes required, works with our stock tune too
2) 10% smaller on the SC nose + 7% on crank pulley (we would modify a stock pulley to keep the vibration damper aspect) - this is the point where new guts are required for long term reliability
3) above + 15% on crank, 8 rib wide & all pullies changed to accommodate the 8 ribs and water pump and alternator pulley resized to restore the original crank pulley gearing.

weederr33 · 01-03-2016, 08:43 PM

So... what would this new pulley cost?

Matt@Cosworth · 01-04-2016, 08:14 AM

Quote:

Originally Posted by weederr33

So... what would this new pulley cost?

dunno yet
I'll get some quotes in

weederr33 · 01-07-2016, 12:42 AM

Quote:

Originally Posted by Matt@Cosworth

there's a few options
1) just 10% smaller pulley on the SC nose - no other changes required, works with our stock tune too
2) 10% smaller on the SC nose + 7% on crank pulley (we would modify a stock pulley to keep the vibration damper aspect) - this is the point where new guts are required for long term reliability
3) above + 15% on crank, 8 rib wide & all pullies changed to accommodate the 8 ribs and water pump and alternator pulley resized to restore the original crank pulley gearing.

So with Option 3, what do you suspect the output would be? Or would different internals vary the power (i.e. 9:1 vs 10:1 compression)?

Matt@Cosworth · 01-07-2016, 08:09 AM

should be about 380Bhp with a 10.5:1 ratio

ajc209 · 01-07-2016, 08:15 AM

Quote:

Originally Posted by Matt@Cosworth

should be about 380Bhp with a 10.5:1 ratio

That'll be nearly enough to match your TVR power/weight. Would be fun/scary to try that on primacies

weederr33 · 01-07-2016, 02:44 PM

380 is a bit much for me, but that is pretty awesome

ajc209 · 01-07-2016, 03:00 PM

And I've heard they've spun these tvs chargers quite a bit faster than their rated max without any issues ;-)

Sent from my GT-I9300 using Tapatalk

JerryIII · 01-07-2016, 03:11 PM

I have a set of GFB light weight pulleys is that bad ?

weederr33 · 01-07-2016, 03:38 PM

I don't see why it would be bad? I have the Perrin crank pulley, water pump, and alternator pullies, too.

killboy · 01-07-2016, 03:58 PM

Quote:

Originally Posted by weederr33

380 is a bit much for me, but that is pretty awesome

Note he said bhp, not whp. That would translate to about 320whp I figure.

ajc209 · 01-07-2016, 04:10 PM

Personally I wouldn't mess with crank damping with an sc installed.

I dont think these cars loose 60hp in the drivetrain. Perhaps 40hp.

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01-02-2016, 05:27 PM	#212
weederr33 Airborne at your service Join Date: Sep 2014 Drives: '17 BRZ Series.Yellow Location: El Paso, Texas Posts: 6,420 Thanks: 4,579 Thanked 5,706 Times in 2,992 Posts Mentioned: 33 Post(s) Tagged: 2 Thread(s)	So to truly bring out this supercharger, you'd need a pulley kit for the entire engine or just the crank pulley? Would that effect the engine in any negative ways? As well, there have been many debates on the harmonic dampener that the stock crank pulley is (supposedly). Would you guys address this as well? __________________ Series.Yellowbird - http://www.ft86club.com/forums/showthread.php?t=122135 MS, CSCS, TSAC-F, CPT

01-03-2016, 08:43 PM	#214
weederr33 Airborne at your service Join Date: Sep 2014 Drives: '17 BRZ Series.Yellow Location: El Paso, Texas Posts: 6,420 Thanks: 4,579 Thanked 5,706 Times in 2,992 Posts Mentioned: 33 Post(s) Tagged: 2 Thread(s)	So... what would this new pulley cost? __________________ Series.Yellowbird - http://www.ft86club.com/forums/showthread.php?t=122135 MS, CSCS, TSAC-F, CPT

01-07-2016, 02:44 PM	#219
weederr33 Airborne at your service Join Date: Sep 2014 Drives: '17 BRZ Series.Yellow Location: El Paso, Texas Posts: 6,420 Thanks: 4,579 Thanked 5,706 Times in 2,992 Posts Mentioned: 33 Post(s) Tagged: 2 Thread(s)	380 is a bit much for me, but that is pretty awesome __________________ Series.Yellowbird - http://www.ft86club.com/forums/showthread.php?t=122135 MS, CSCS, TSAC-F, CPT

01-07-2016, 03:38 PM	#222
weederr33 Airborne at your service Join Date: Sep 2014 Drives: '17 BRZ Series.Yellow Location: El Paso, Texas Posts: 6,420 Thanks: 4,579 Thanked 5,706 Times in 2,992 Posts Mentioned: 33 Post(s) Tagged: 2 Thread(s)	I don't see why it would be bad? I have the Perrin crank pulley, water pump, and alternator pullies, too. __________________ Series.Yellowbird - http://www.ft86club.com/forums/showthread.php?t=122135 MS, CSCS, TSAC-F, CPT

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01-03-2016, 04:46 AM	#213
Matt@Cosworth Senior Member Join Date: Dec 2015 Drives: blue - Cosworth SC stage 3.0 Location: Northants - UK Posts: 333 Thanks: 3 Thanked 394 Times in 184 Posts Mentioned: 34 Post(s) Tagged: 1 Thread(s)	there's a few options 1) just 10% smaller pulley on the SC nose - no other changes required, works with our stock tune too 2) 10% smaller on the SC nose + 7% on crank pulley (we would modify a stock pulley to keep the vibration damper aspect) - this is the point where new guts are required for long term reliability 3) above + 15% on crank, 8 rib wide & all pullies changed to accommodate the 8 ribs and water pump and alternator pulley resized to restore the original crank pulley gearing.

01-07-2016, 08:09 AM	#217
Matt@Cosworth Senior Member Join Date: Dec 2015 Drives: blue - Cosworth SC stage 3.0 Location: Northants - UK Posts: 333 Thanks: 3 Thanked 394 Times in 184 Posts Mentioned: 34 Post(s) Tagged: 1 Thread(s)	should be about 380Bhp with a 10.5:1 ratio

01-07-2016, 03:00 PM	#220
ajc209 Senior Member Join Date: Dec 2011 Drives: GT86 Cosworth Location: UK Posts: 753 Thanks: 361 Thanked 270 Times in 188 Posts Mentioned: 9 Post(s) Tagged: 1 Thread(s)	And I've heard they've spun these tvs chargers quite a bit faster than their rated max without any issues ;-) Sent from my GT-I9300 using Tapatalk

01-07-2016, 03:11 PM	#221
JerryIII Member Join Date: Dec 2013 Drives: Subaru BRZ Location: WI , FL Posts: 74 Thanks: 22 Thanked 52 Times in 21 Posts Mentioned: 2 Post(s) Tagged: 1 Thread(s)	I have a set of GFB light weight pulleys is that bad ?

01-07-2016, 04:10 PM	#224
ajc209 Senior Member Join Date: Dec 2011 Drives: GT86 Cosworth Location: UK Posts: 753 Thanks: 361 Thanked 270 Times in 188 Posts Mentioned: 9 Post(s) Tagged: 1 Thread(s)	Personally I wouldn't mess with crank damping with an sc installed. I dont think these cars loose 60hp in the drivetrain. Perhaps 40hp. Sent from my GT-I9300 using Tapatalk

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