Welcome Guest!!!

Thank you for visiting the GM Kappa Performance Forum. This forum is the only performance oriented forum for all GM Kappa Platform Enthusiasts.  We hope you will join and share your experiences.  Becoming a member is FREE! If you want to advertise on this forum, email KappaPerformance at yahoo.com.


Registration required to view the forum attachments. Below is a sample of the current top 25 topics.
Supporting Membership has many advantages.


More information on becoming a supporting member or vendor can be found on the sub forum; Site Help and Suggestions; thread - Supporting Members and Vendors.

Author Topic: Rotrex owners opinions wanted  (Read 696 times)

0 Members and 1 Guest are viewing this topic.

Offline Healix

  • Apprentice/Gofer
  • *
  • Posts: 9
  • Karma: +0/-0
  • Location: Houston, Texas
Rotrex owners opinions wanted
« on: December 14, 2017, 08:23:36 PM »
Looking to hear input from any and all Rotrex owners. What is your experience? I'm ready to pull the trigger, but trying to decide between Hahn stage 3 turbo, or the upgraded Rotrex kit from DDM. Your input is greatly appreciated!

Offline elff

  • Lifetime Supporting
  • General Manager
  • *
  • Posts: 10468
  • Karma: +24/-56
  • Location: Keebler Tree House
    • Ryuk
Re: Rotrex owners opinions wanted
« Reply #1 on: December 14, 2017, 10:25:53 PM »
a better question would be

How do you want your Kappa to perform.

Do you want more HP but at the expense of no power in the lower rpm range
or
Do you want instant power, that tops out at the higher rpms.

That's basically the difference between a large turbo and super charger

Online Sly Bob

  • Administrators
  • Shop Foreman
  • *
  • Posts: 7540
  • Karma: +12/-10
  • Location: Welland, Ontario, Canada
  • My new grandson
    • Kappa Performance Forum
Re: Rotrex owners opinions wanted
« Reply #2 on: December 14, 2017, 10:49:44 PM »
Oh do the SC. Can't beat the sound of one.
Just trying to do my part...

Mods: Lose the chicklets, VentureShield, Dual horns, AfterShock spoiler, Weathershield cover, Lil Chromies, Red calipers with black Solstice stickers, Opel GT antenna and Solo GXP-RCD exhaust with a Solo hi-flow cat!

Offline Healix

  • Apprentice/Gofer
  • *
  • Posts: 9
  • Karma: +0/-0
  • Location: Houston, Texas
Re: Rotrex owners opinions wanted
« Reply #3 on: December 15, 2017, 03:52:57 PM »
a better question would be

How do you want your Kappa to perform.

Do you want more HP but at the expense of no power in the lower rpm range
or
Do you want instant power, that tops out at the higher rpms.

That's basically the difference between a large turbo and super charger

I would rather have low end grunt so a PD S/C would be perfect, but that isn't available anymore.  The Rotrex is similar to a turbo but belt driven instead of exhaust driven, and simpler too.  I'm just wondering if the Rotrex can be tuned to give a bit more power lower down in the rpm range or not. 

Offline Healix

  • Apprentice/Gofer
  • *
  • Posts: 9
  • Karma: +0/-0
  • Location: Houston, Texas
Re: Rotrex owners opinions wanted
« Reply #4 on: December 15, 2017, 03:54:35 PM »
Oh do the SC. Can't beat the sound of one.
Do you know where I can get an MP62 kit?  DDM doesn't make them anymore.  Haven't seen anyone selling theirs either.  Do you happen to have a connection??

Offline Sol Asylum

  • Lifetime Supporting
  • Shop Foreman
  • *
  • Posts: 9026
  • Karma: +36/-64
  • Location: Tolono Illinois
  • THAT'S MISTER KAPPA ASSYLUM TO YOU!
Re: Rotrex owners opinions wanted
« Reply #5 on: December 15, 2017, 04:32:31 PM »
Is that what Critter has installed on his car?  GJ think we can help a new guy out?  Critter won't notice will he?
2007 Aggressive GXP

Offline Healix

  • Apprentice/Gofer
  • *
  • Posts: 9
  • Karma: +0/-0
  • Location: Houston, Texas
Re: Rotrex owners opinions wanted
« Reply #6 on: December 15, 2017, 06:07:55 PM »
Is that what Critter has installed on his car?  GJ think we can help a new guy out?  Critter won't notice will he?
Yes, that is what Critter has on his.  Don't tease me now.  If you have the hookup on a stage 3 s/c kit, you've got yourself a buyer.  Please tell me you aren't kidding around Mister Kappa Asylum sir!

Offline Critterman

  • Retired, thank you very much
  • Lifetime Supporting
  • General Manager
  • *
  • Posts: 12532
  • Karma: +17/-56
  • Baltimore/Washington Corridor
Re: Rotrex owners opinions wanted
« Reply #7 on: December 15, 2017, 06:25:05 PM »
You do know about my gun collecting SA, correct?
2006 Cool named BIXABEL (BISH-AH-BEL) Mayan for "Good Roads"

DDM
StageIII intercooled Supercharger, Wisco ceramic coated pistons, Carrillo rods, superTech valves and Springs
Ported and polished head
Exedy Stage II Clutch
big brake kit, slotted/drilled Rotors w/Porterfield pads & blue juice
Backbone, Probeam, Cross Strut Brace
Underhood, trunk, & door Lights
ZOK suspension
Lambo Doors

JPM
Center console, door inserts, & dash
Seat bolster & lumbar support

Focuztech Tri-Y Header & hi-flow cat
Solo Performance SQR-2
Norm's Rear facia
Heated Seats
Black Cat inserts

Offline Helios

  • Lifetime Supporting
  • Gearhead
  • *
  • Posts: 1279
  • Karma: +4/-3
  • Location: Charleston, SC
  • Play Hard; Drive Harder!
Re: Rotrex owners opinions wanted
« Reply #8 on: December 15, 2017, 09:06:09 PM »
I installed a Rotrex SC in my wife's BRZ. The power is very linear. Easy to install and maintain, imo. Pulley size changes can easily increase boost. I'm not a fan of turbos, but they do have their merits.
"Gwyneth"
V8 swap in progress
RPi GT/ SOLO Exhaust

Offline Sol Asylum

  • Lifetime Supporting
  • Shop Foreman
  • *
  • Posts: 9026
  • Karma: +36/-64
  • Location: Tolono Illinois
  • THAT'S MISTER KAPPA ASSYLUM TO YOU!
Re: Rotrex owners opinions wanted
« Reply #9 on: December 15, 2017, 09:58:52 PM »
You do know about my gun collecting SA, correct?

Of course I do that's why I'm bringing GJ along, don't tell him okay?

My hookup would be Dave or Ivy at DDM, have you called DDM and talked with them?  Maybe get Critter to sweet talk Ivy into getting a kit put together for you.
« Last Edit: December 15, 2017, 10:05:17 PM by Sol Asylum »
2007 Aggressive GXP

Offline Gentleman Jack

  • I haven't been relevant for a while
  • Lifetime Supporting
  • Shop Foreman
  • *
  • Posts: 8573
  • Karma: +21/-80
  • Location: Unknown
  • When I'm walkin' I strut my stuff
Re: Rotrex owners opinions wanted
« Reply #10 on: December 16, 2017, 01:21:55 AM »
Why not just buy Critter’s car?
May the Schwartz be wit you

Offline Sol Asylum

  • Lifetime Supporting
  • Shop Foreman
  • *
  • Posts: 9026
  • Karma: +36/-64
  • Location: Tolono Illinois
  • THAT'S MISTER KAPPA ASSYLUM TO YOU!
Re: Rotrex owners opinions wanted
« Reply #11 on: December 18, 2017, 12:03:11 PM »
Why not just buy Critter’s car?

Do we somehow get all the money with this idea?  If not I think my original idea still might be the way to go.
2007 Aggressive GXP

Offline Critterman

  • Retired, thank you very much
  • Lifetime Supporting
  • General Manager
  • *
  • Posts: 12532
  • Karma: +17/-56
  • Baltimore/Washington Corridor
Re: Rotrex owners opinions wanted
« Reply #12 on: December 18, 2017, 07:39:20 PM »
Everything over 20k you can share with GJ.  Under that it is all mine.
2006 Cool named BIXABEL (BISH-AH-BEL) Mayan for "Good Roads"

DDM
StageIII intercooled Supercharger, Wisco ceramic coated pistons, Carrillo rods, superTech valves and Springs
Ported and polished head
Exedy Stage II Clutch
big brake kit, slotted/drilled Rotors w/Porterfield pads & blue juice
Backbone, Probeam, Cross Strut Brace
Underhood, trunk, & door Lights
ZOK suspension
Lambo Doors

JPM
Center console, door inserts, & dash
Seat bolster & lumbar support

Focuztech Tri-Y Header & hi-flow cat
Solo Performance SQR-2
Norm's Rear facia
Heated Seats
Black Cat inserts

Offline Gentleman Jack

  • I haven't been relevant for a while
  • Lifetime Supporting
  • Shop Foreman
  • *
  • Posts: 8573
  • Karma: +21/-80
  • Location: Unknown
  • When I'm walkin' I strut my stuff
Rotrex owners opinions wanted
« Reply #13 on: December 19, 2017, 11:32:09 AM »
Critter-
I’ll give you $3,876.32 this year and another $1,257.99 next June. But only if you deliver the car in person before Dec 29th 2017 and hang out here for a week.
May the Schwartz be wit you

Offline Sol Asylum

  • Lifetime Supporting
  • Shop Foreman
  • *
  • Posts: 9026
  • Karma: +36/-64
  • Location: Tolono Illinois
  • THAT'S MISTER KAPPA ASSYLUM TO YOU!
Re: Rotrex owners opinions wanted
« Reply #14 on: December 19, 2017, 12:05:01 PM »
How could he say no to that offer?

GJ if you offer him over 20K you and I get to split the amount over 20K.  So if you offer him 20K +1 we can split the $1 and that's better for us because even $1 is better than nothing.
2007 Aggressive GXP

Offline Critterman

  • Retired, thank you very much
  • Lifetime Supporting
  • General Manager
  • *
  • Posts: 12532
  • Karma: +17/-56
  • Baltimore/Washington Corridor
Re: Rotrex owners opinions wanted
« Reply #15 on: December 19, 2017, 04:32:43 PM »
What an offer, but it means I would have to miss Christmas.  So I will have to say no. 
2006 Cool named BIXABEL (BISH-AH-BEL) Mayan for "Good Roads"

DDM
StageIII intercooled Supercharger, Wisco ceramic coated pistons, Carrillo rods, superTech valves and Springs
Ported and polished head
Exedy Stage II Clutch
big brake kit, slotted/drilled Rotors w/Porterfield pads & blue juice
Backbone, Probeam, Cross Strut Brace
Underhood, trunk, & door Lights
ZOK suspension
Lambo Doors

JPM
Center console, door inserts, & dash
Seat bolster & lumbar support

Focuztech Tri-Y Header & hi-flow cat
Solo Performance SQR-2
Norm's Rear facia
Heated Seats
Black Cat inserts

Offline ChopTop

  • Lifetime Supporting
  • Gearhead
  • *
  • Posts: 1438
  • Karma: +9/-6
  • Location: Hooverville, MI
Re: Rotrex owners opinions wanted
« Reply #16 on: December 22, 2017, 08:55:52 AM »
Do you know where I can get an MP62 kit?  DDM doesn't make them anymore.  Haven't seen anyone selling theirs either.  Do you happen to have a connection??

Ditto on interest on the MP62.  I've looked at the Rotrex but don't care for the fact that you have to be at the top of the rev range for optimum results.  Plus 99% of my Sol driving is done in the city where it seems to make more sense to want instant torque at low RPM rather than high.  Also, I can't remember the price of the MP62 kit, but it sure seems like the Rotrex kit is about 1/3 higher, which is significant to me.  Add in that it might make more sense money wise to sell a 2.4 Kappa and buy a GXP model instead.

Having said that, I bought the 2.4 with the hope that I'd someday go w/a V8 but it looks like I may have to settle for an alternative.  BTW, I don't think it helped that DDM said they were upgrading the MP62 kit for a couple years, and then decided to go w/the Rotrex supercharger instead.  Had people known that at the beginning, I think more MP62 kits would have been sold when they were available.  But I understand that it was probably a business decision on DDM part, and based on the potential of the Slingshot market, and that the Rotrex is smaller and can be located down lower in the Slingshots engine compartment.
« Last Edit: December 22, 2017, 09:01:35 AM by ChopTop »

Offline Steelmesh

  • Lifetime Supporting
  • Master Tech
  • *
  • Posts: 129
  • Karma: +4/-1
  • Location: Detroit
Re: Rotrex owners opinions wanted
« Reply #17 on: December 22, 2017, 09:37:04 AM »
Ditto on interest on the MP62.  I've looked at the Rotrex but don't care for the fact that you have to be at the top of the rev range for optimum results.  Plus 99% of my Sol driving is done in the city where it seems to make more sense to want instant torque at low RPM rather than high.  Also, I can't remember the price of the MP62 kit, but it sure seems like the Rotrex kit is about 1/3 higher, which is significant to me.  Add in that it might make more sense money wise to sell a 2.4 Kappa and buy a GXP model instead.

Having said that, I bought the 2.4 with the hope that I'd someday go w/a V8 but it looks like I may have to settle for an alternative.  BTW, I don't think it helped that DDM said they were upgrading the MP62 kit for a couple years, and then decided to go w/the Rotrex supercharger instead.  Had people known that at the beginning, I think more MP62 kits would have been sold when they were available.  But I understand that it was probably a business decision on DDM part, and based on the potential of the Slingshot market, and that the Rotrex is smaller and can be located down lower in the Slingshots engine compartment.

Did the DDM MP62 kit propose an intercooler?  Water-to-Air or front mounted?  I guess it depends on where it was proposed to be installed...
Support Kappaperformance.com!!  Note: a single corporation owns and controls over 400 of the top automotive enthusiast forums on the internet. In-your-face advertising and don't allow non-vendors to talk about non-vendor products via private messaging, purely profit focused forums.

317whp/329wtrq 2006 Solstice #1458 AR5 LE5 Werks Turbo Kit 5557, Meth, 18 PSI, Kappadapt clutch hose, Kappadapt flywheel bolts, Kappadapt trans mount

2013 Cruze ZZP, tuned, 42 lb, ZZP SRI/FMIC/DP/MP/CB, Kappadapt trans mount

Offline Critterman

  • Retired, thank you very much
  • Lifetime Supporting
  • General Manager
  • *
  • Posts: 12532
  • Karma: +17/-56
  • Baltimore/Washington Corridor
Re: Rotrex owners opinions wanted
« Reply #18 on: December 22, 2017, 10:30:38 AM »
Up front intercooler.  I believe that was part of the stage II update, or perhaps the stage III.   Has anyone contacted Dave or Ivy at DDM and asked if they can still get/do the kits?
2006 Cool named BIXABEL (BISH-AH-BEL) Mayan for "Good Roads"

DDM
StageIII intercooled Supercharger, Wisco ceramic coated pistons, Carrillo rods, superTech valves and Springs
Ported and polished head
Exedy Stage II Clutch
big brake kit, slotted/drilled Rotors w/Porterfield pads & blue juice
Backbone, Probeam, Cross Strut Brace
Underhood, trunk, & door Lights
ZOK suspension
Lambo Doors

JPM
Center console, door inserts, & dash
Seat bolster & lumbar support

Focuztech Tri-Y Header & hi-flow cat
Solo Performance SQR-2
Norm's Rear facia
Heated Seats
Black Cat inserts

Offline DaveOC

  • Master Tech
  • ***
  • Posts: 637
  • Karma: +2/-3
  • Location: SE Wisconsin
  • Running Wisconsin
Re: Rotrex owners opinions wanted
« Reply #19 on: December 22, 2017, 11:33:24 AM »
The DDM MP62 Stage 1 kit did not have an intercooler. Both the Stage 2 and Stage 3 kits had an intercooler in front of the radiator, in the same spot that the intercooler is on the GXP and Redlines.

:thumbs:

.
Aggressive #000741

Offline elff

  • Lifetime Supporting
  • General Manager
  • *
  • Posts: 10468
  • Karma: +24/-56
  • Location: Keebler Tree House
    • Ryuk
Re: Rotrex owners opinions wanted
« Reply #20 on: December 22, 2017, 01:43:19 PM »
If you can't get the MP62 SC and you want TQ in the low end, I would suggest going with a KO4 turbo.  It's the perfect size for the engine and will give you good power in the low to mid 2000 rpm range.  It's very cost effective as well

Offline ChopTop

  • Lifetime Supporting
  • Gearhead
  • *
  • Posts: 1438
  • Karma: +9/-6
  • Location: Hooverville, MI
Re: Rotrex owners opinions wanted
« Reply #21 on: December 23, 2017, 05:36:30 PM »
I think DDM already knows there continues to be interest in a positive displacement supercharger considering how long folks have continued to show interest, but the business case might not be there to justify offering it again.  That's why I was wondering if RPM would be interested.  The impression I've been getting via FB, sounds like RPM business is running a lot smoother now than what some people thought about them in the past. 

As far as a turbo goes, I'd be looking at Hahn at this point but their turbo prices are higher than the competition, and the feeling I'm getting from reading some of Bill Hahn posts goes rightfully so because of the quality of their turbo kits.
« Last Edit: December 30, 2017, 12:27:37 PM by ChopTop »

Offline Gentleman Jack

  • I haven't been relevant for a while
  • Lifetime Supporting
  • Shop Foreman
  • *
  • Posts: 8573
  • Karma: +21/-80
  • Location: Unknown
  • When I'm walkin' I strut my stuff
Re: Rotrex owners opinions wanted
« Reply #22 on: December 23, 2017, 06:59:44 PM »
Santa Claus mentioned this product may or may not be dead in the water. Just sayin’
May the Schwartz be wit you

Offline Sol Asylum

  • Lifetime Supporting
  • Shop Foreman
  • *
  • Posts: 9026
  • Karma: +36/-64
  • Location: Tolono Illinois
  • THAT'S MISTER KAPPA ASSYLUM TO YOU!
Re: Rotrex owners opinions wanted
« Reply #23 on: December 24, 2017, 12:27:56 AM »
Did you try talking to Mrs Claus?
2007 Aggressive GXP

Offline Critterman

  • Retired, thank you very much
  • Lifetime Supporting
  • General Manager
  • *
  • Posts: 12532
  • Karma: +17/-56
  • Baltimore/Washington Corridor
Re: Rotrex owners opinions wanted
« Reply #24 on: December 30, 2017, 11:02:20 AM »
Critter-
I’ll give you $3,876.32 this year and another $1,257.99 next June. But only if you deliver the car in person before Dec 29th 2017 and hang out here for a week.

You could have made that offer 10 times higher and still been safe.  No way I could have made it cross country with the weather the way it has been.  :)
2006 Cool named BIXABEL (BISH-AH-BEL) Mayan for "Good Roads"

DDM
StageIII intercooled Supercharger, Wisco ceramic coated pistons, Carrillo rods, superTech valves and Springs
Ported and polished head
Exedy Stage II Clutch
big brake kit, slotted/drilled Rotors w/Porterfield pads & blue juice
Backbone, Probeam, Cross Strut Brace
Underhood, trunk, & door Lights
ZOK suspension
Lambo Doors

JPM
Center console, door inserts, & dash
Seat bolster & lumbar support

Focuztech Tri-Y Header & hi-flow cat
Solo Performance SQR-2
Norm's Rear facia
Heated Seats
Black Cat inserts

 

Powered by EzPortal