HKS Supercharger Power and Pricing Released! - Page 6 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DriftEightSix · 08-28-2012, 07:00 AM

wow the power gain is just a like a turbo... but still has the huge dip in the 3 -4 k rpm range :s...

_F-R-S_ · 08-28-2012, 07:12 AM

pft with 6500$ i could just put a downpayment on another FRS!!

Justin.b · 08-28-2012, 07:42 AM

Quote:

Originally Posted by sw20kosh

No offense to HKS but I don't like the torque dip and the loss of power 6200 rpm and up. (If that is a real representation of the dyno plot). All the turbo kits alleviate this problem why can't this kit do it? Is it a limitation of the tuning (Fcon)?

This kit relies on engine torque to spin the compressor. When there's less torque available at the crank, the compressor can slow down and push less air.

Turbos can get around this because they have no direct mechanical coupling to the crank.

-Justin

Skyllz · 08-28-2012, 07:55 AM

Lots of love for the rotrex unit, but a little disappointed in the HKS pricing however.

A rotrex with the bracket with my own piping and a EcuTek would be mint and come out much cheaper...

Don@Accelerated · 08-28-2012, 08:45 AM

Quote:

Originally Posted by sw20kosh

No offense to HKS but I don't like the torque dip and the loss of power 6200 rpm and up. (If that is a real representation of the dyno plot). All the turbo kits alleviate this problem why can't this kit do it? Is it a limitation of the tuning (Fcon)?

Thats not the FCon doing that

Muahahah (evil laugh)

sw20kosh · 08-28-2012, 01:35 PM

Quote:

Originally Posted by Don@Accelerated

Thats not the FCon doing that

Muahahah (evil laugh)

your answers always leave more to be desired....

sw20kosh · 08-28-2012, 01:38 PM

Quote:

Originally Posted by Justin.b

This kit relies on engine torque to spin the compressor. When there's less torque available at the crank, the compressor can slow down and push less air.

Turbos can get around this because they have no direct mechanical coupling to the crank.

-Justin

It actually uses engine RPM to gain its RPM. This is why the boost is tied to engine RPM and you dont make max boost till max RPM.

It has nothing to do with torque.

4k rpm = X rpm on the compressor so it is not a boost issue.

HKS Australia · 09-03-2012, 08:17 PM

StarsGarrador · 09-03-2012, 08:38 PM

Quote:

Originally Posted by HKS Australia

You should send me a kit so I can stay HKS everything

saving up for hyper coils and my HI-Power goes on this weekend

I'll put the two biggest HKS decals you got on the car and get HKS tattooed on me lmao! So stoked for this kit.

GenkiElite · 09-03-2012, 09:51 PM

Quote:

Originally Posted by sw20kosh

No offense to HKS but I don't like the torque dip and the loss of power 6200 rpm and up. (If that is a real representation of the dyno plot). All the turbo kits alleviate this problem why can't this kit do it? Is it a limitation of the tuning (Fcon)?

Thats pretty typical of SC. Broad powerband that falls off up top while turbos typically wont have as much down low but build with RPM's.

uspspro · 09-04-2012, 02:23 AM

It only falls off because they are using a restrictor in the inlet to keep the boost/flow in check at high rpm with a smaller SC pulley vs. killing the midrange with a really large SC pulley. If this SC was unrestricted, in would most likely make peak power at redline.

Tradewind · 09-04-2012, 06:12 AM

Quote:

Originally Posted by uspspro

It only falls off because they are using a restrictor in the inlet to keep the boost/flow in check at high rpm with a smaller SC pulley vs. killing the midrange with a really large SC pulley. If this SC was unrestricted, in would most likely make peak power at redline.

Yes to that

As for the dip, that is 99% likely to the short comings in the tuning product

With an ECUTEK tune that dip would disappear as the bit of manifold pressure plus good tune - be dip free curve

Turbowned · 09-13-2012, 06:44 PM

I need to buy and install my own spark plugs?! Deal-breaker right there!!

@HKS Australia, what exhaust system is this kit tested with? Makes a big difference if it's being tested with a stock system or a Hi-Power system, stock header vs. aftermarket, etc.

RAYSSPL · 09-14-2012, 12:23 AM

jackson racing and vortech may come up with a supercharger kit that i think could come cheaper than hks. that may be worth waiting for.

08-28-2012, 07:00 AM	#71
DriftEightSix Pegasus White Join Date: Jun 2012 Drives: 86 Location: Brisbane. Posts: 973 Thanks: 646 Thanked 126 Times in 104 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	wow the power gain is just a like a turbo... but still has the huge dip in the 3 -4 k rpm range :s... __________________ Driving: Pegasus White Manual GTS 86.

09-14-2012, 12:23 AM	#84
RAYSSPL Senior Member Join Date: Sep 2012 Drives: bicycle Location: SoCal Posts: 152 Thanks: 106 Thanked 44 Times in 31 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	jackson racing and vortech may come up with a supercharger kit that i think could come cheaper than hks. that may be worth waiting for. __________________ eezitec.com ft1club.co

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08-28-2012, 07:12 AM	#72
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Skyllz Senior Member Join Date: Aug 2012 Drives: Something fun. Location: Canada Posts: 106 Thanks: 39 Thanked 54 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Lots of love for the rotrex unit, but a little disappointed in the HKS pricing however. A rotrex with the bracket with my own piping and a EcuTek would be mint and come out much cheaper...

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09-04-2012, 02:23 AM	#81
uspspro Senior Member Join Date: Mar 2012 Drives: DGM BRZ, MR-S 3.5L V6 swap (sold) Location: Bay Area, CA Posts: 602 Thanks: 28 Thanked 188 Times in 121 Posts Mentioned: 1 Post(s) Tagged: 1 Thread(s)	It only falls off because they are using a restrictor in the inlet to keep the boost/flow in check at high rpm with a smaller SC pulley vs. killing the midrange with a really large SC pulley. If this SC was unrestricted, in would most likely make peak power at redline.

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