HKS GT Supercharger (Rotrex) in development! - Page 7 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

uspspro · 03-28-2012, 04:49 PM

Quote:

Originally Posted by Turbowned

I've never driven a centrifugal blower-equipped car and I hear it's not quite as responsive as a roots-style blower but I'm sure it will kick ass nonetheless!
[/U]

The response is instant, just like NA... no lag at all.

However the Rotrex doesn't add gobs of low-mid rage torque like a turbo.

What it does do is make the engine feel like a giant sport bike engine. There is no lag, no spooling, but the power just keeps building (but at a linear rate).

I will post my 1zzfe dyno again below... again this started at 125 rwhp. The toruqe is pretty flat from 4500 - 7500.

Dimman · 03-28-2012, 06:28 PM

Quote:

Originally Posted by Turbowned

Yeah, OK. This 1.6L 20v 4AGE engine makes 160bhp stock, the Rotrex bumped it to 267bhp. That's really "meh".

All I can say is Rotrex =

280bhp or about 10:1 power-to-weight ratio is what I want. I've never driven a centrifugal blower-equipped car and I hear it's not quite as responsive as a roots-style blower but I'm sure it will kick ass nonetheless!

Here's a good video promoting the Rotrex S/C and if Kraftwerks makes a kit in the $32-3500 range, well sorry HK$ but you won't be getting my money:

Yes and I've seen 300 whp 16v turbo 4AGE. So?

Find a dyno graph of a Lysholm twin-screw on a 4AGE, making the same boost as the Rotrex and you'll see what I'm talking about.

Turbowned · 03-28-2012, 06:52 PM

Quote:

Originally Posted by Dimman

Yes and I've seen 300 whp 16v turbo 4AGE. So?

Find a dyno graph of a Lysholm twin-screw on a 4AGE, making the same boost as the Rotrex and you'll see what I'm talking about.

"Our first dyno plot pulled 208rwhp with a blower half the size smaller then the one we are using for the kit. We ended up making 260rwhp with 220ftlbs at 21 psi with this smaller blower."

http://forums.club4ag.com/zerothread?id=6518

So better, yes. I can't find a pic of the actual dyno plot, but...

uspspro · 03-28-2012, 07:40 PM

Here's a bigger Rotrex on a K20

Jordo! · 03-28-2012, 08:27 PM

Has to be an Eaton or twin screw if you want a nice flat torque curve.

That would be ideal for this motor if they can fit it.

Dimman · 03-28-2012, 09:00 PM

Quote:

Originally Posted by Jordo!

Has to be an Eaton or twin screw if you want a nice flat torque curve.

That would be ideal for this motor if they can fit it.

Ding!

Unfortunately with packaging it looks like it would have to be a style that is integrated with the intake manifold.

Voodoo Rufus · 03-28-2012, 11:03 PM

Just to throw something out there for consideration, URD makes a Rotrex-based supercharger kit for the Toyota Tacoma. It's quite potent.

http://www.urdusa.com/Forced-Inducti...duct_info.html

Fox · 03-29-2012, 02:39 PM

No specs (or do you unterstand anything?)

http://ft86.me/forum_patio/cgi-bin/r...s=forum&no=195

uspspro · 03-29-2012, 02:59 PM

Quote:

Originally Posted by Fox

No specs (or do you unterstand anything?)

http://ft86.me/forum_patio/cgi-bin/r...s=forum&no=195

Cessblood · 03-29-2012, 03:08 PM

Quote:

Originally Posted by Fox

No specs (or do you unterstand anything?)

http://ft86.me/forum_patio/cgi-bin/r...s=forum&no=195

I'm a believer now

mines13 · 03-29-2012, 03:45 PM

That page says 172PS to 250PS, if this is similar to the baseline dyno from the video, then thats a 78PS increase. roughly 75hp or so gain over stock. Pretty nice.

Crashoverride · 03-29-2012, 03:49 PM

Thats what I'm looking for. Sign me up and take my money!!!
I wonder if you have to change out the fuel injectors...Intercooled?

mines13 · 03-29-2012, 03:54 PM

Quote:

Originally Posted by Crashoverride

Thats what I'm looking for. Sign me up and take my money!!!
I wonder if you have to change out the fuel injectors...Intercooled?

Looks like there is some form of air/air intercooling setup as the outlet of the compressor goes down into the bumper and then comes back up through just off center to the throttle body. Appears to be no external injection setup, likely remapped the factory ECU or using an F-CON piggy back.

madfast · 03-29-2012, 05:02 PM

http://ameblo.jp/nob-taniguchi/

its says:

この仕様で250馬力です。

エンジンがまるっきりのノーマルの為、ブーストも抑えめの0.6

これ以上ブーストをかけるには、
ピストンとコンロッドを交換しないと、壊れちゃう…かも。

which google translates to:

250 hp in this specification. Normal for Marukkiri, 0.6 second boost engine is also reduced to make a boost more than this, and do not replace the piston and connecting rod, will break ... Perhaps.

03-29-2012, 02:39 PM	#92
Fox Senior Member Join Date: Jan 2010 Drives: GT86, MR2 Location: Germany Posts: 127 Thanks: 19 Thanked 12 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	No specs (or do you unterstand anything?) http://ft86.me/forum_patio/cgi-bin/r...s=forum&no=195 __________________ hello germans, please visit the first german gt86 community

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03-28-2012, 07:40 PM	#88
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)	Here's a bigger Rotrex on a K20

03-28-2012, 08:27 PM	#89
Jordo! Enjoy it, destroy it. Join Date: Oct 2009 Drives: Datsun Racing Hen Location: Blank Generation Posts: 820 Thanks: 6 Thanked 61 Times in 48 Posts Mentioned: 1 Post(s) Tagged: 2 Thread(s)	Has to be an Eaton or twin screw if you want a nice flat torque curve. That would be ideal for this motor if they can fit it.

03-28-2012, 11:03 PM	#91
Voodoo Rufus The Ruthless Join Date: Nov 2011 Drives: 2015 STI Launch Edition Location: Bakersfield, CA Posts: 53 Thanks: 26 Thanked 7 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Just to throw something out there for consideration, URD makes a Rotrex-based supercharger kit for the Toyota Tacoma. It's quite potent. http://www.urdusa.com/Forced-Inducti...duct_info.html

03-29-2012, 03:45 PM	#95
mines13 Join Date: Nov 2011 Drives: '13 FR-S '12 CBR1000RR Location: Irvine, CA Posts: 1,038 Thanks: 305 Thanked 527 Times in 241 Posts Mentioned: 22 Post(s) Tagged: 0 Thread(s)	That page says 172PS to 250PS, if this is similar to the baseline dyno from the video, then thats a 78PS increase. roughly 75hp or so gain over stock. Pretty nice.

03-29-2012, 03:49 PM	#96
Crashoverride here, there, any where Join Date: Apr 2011 Drives: FR-S SOON!!! Location: Driver seat Posts: 287 Thanks: 1 Thanked 5 Times in 5 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thats what I'm looking for. Sign me up and take my money!!! I wonder if you have to change out the fuel injectors...Intercooled?

03-29-2012, 05:02 PM	#98
madfast Senior Member Join Date: May 2011 Drives: 2010 Evo X MR-T Location: NY Posts: 942 Thanks: 0 Thanked 21 Times in 11 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	http://ameblo.jp/nob-taniguchi/ its says: この仕様で250馬力です。エンジンがまるっきりのノーマルの為、ブーストも抑えめの0.6 これ以上ブーストをかけるには、ピストンとコンロッドを交換しないと、壊れちゃう…かも。 which google translates to: 250 hp in this specification. Normal for Marukkiri, 0.6 second boost engine is also reduced to make a boost more than this, and do not replace the piston and connecting rod, will break ... Perhaps.

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