2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

Making a Kappa car whine

Old 03-25-2019, 08:06 PM
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Making a Kappa car whine

Converted to run in a Solstice (kappa platform):







Follow the build here: Twincharged Solstice = Turbocharger + Supercharger
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Old 03-25-2019, 09:07 PM
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let me know if you need anything
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Old 03-26-2019, 01:15 AM
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This is a seriously intriguing project. Please keep us updated.
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Old 03-26-2019, 07:25 AM
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Did you fill in and machine or do anything additional to smooth out that lower transition from your upper intake to the supercharger? Not trying to say it won't work without doing that, I have no idea how turbulence affects the efficiency of the blower. I'm really just curious.
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Old 03-26-2019, 10:21 AM
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The donut elbow (very tight radius 3" tube) blows directly at the bypass valve intentionally in this build because twincharger. When the turbo spools it will outrun this little SC so it will be a bit more efficient to blow past it as much as possible. I agree it would be better to have the donut got the full 180 degrees to point directly at the SC rotors if this were a SC only conversion.



Here is what faces the rotors, you can see the end of that donut elbow:


If this works out and I desire more glory, the current plan is to go big turbo and weld on a larger bypass into the side of the intake and use a secondary throttle body to control the bypass. The benefit of this SC is anti-lag especially with a big exhaust turbine. It will add area under the curve in the low-mid range. That's the idea at least...
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Old 03-26-2019, 10:27 AM
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Originally Posted by Slowbalt2000 View Post


let me know if you need anything
I can always use more moral support
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Old 03-26-2019, 10:29 AM
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Bypassing the SC will lower the overall airflow that the engine sees but it will reduce heat.

The way I think of it is, you car is essentially supercharged. Without the turbo, it acts like any other supercharged car would. Adding the turbo just increases the blower inlet pressure which dramatically increases the efficiency of the blower. Youre never going to "outrun" the supercharger with the turbo because the SC just multiplies everything it intakes.The SC is ALWAYS increasing overall airflow. Once the turbo comes on fully the benefits are diminished but its not getting in the way persay. Also, running a larger pulley like a 3.8 also helps to increase blower efficiency and keep the temps way down. On my car and other twincharged deltas ive seen, the stock SC cooling system was controlling intake temps quite well.
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Old 03-26-2019, 10:35 AM
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Originally Posted by Slowbalt2000 View Post
Bypassing the SC will lower the overall airflow that the engine sees but it will reduce heat.

The way I think of it is, you car is essentially supercharged. Without the turbo, it acts like any other supercharged car would. Adding the turbo just increases the blower inlet pressure which dramatically increases the efficiency of the blower. Youre never going to "outrun" the supercharger with the turbo because the SC just multiplies everything it intakes.The SC is ALWAYS increasing overall airflow. Once the turbo comes on fully the benefits are diminished but its not getting in the way persay. Also, running a larger pulley like a 3.8 also helps to increase blower efficiency and keep the temps way down. On my car and other twincharged deltas ive seen, the stock SC cooling system was controlling intake temps quite well.
This.
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Old 03-26-2019, 10:49 AM
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Thanks for clarifying this concept. My major concern is compounding the heat through the SC once the TC gets into it. I'll get a 3.8 pulley next!
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Old 03-26-2019, 10:50 AM
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If you enjoyed doing that to the supercharger, there's a market of ecotec-swapped Miatas that would like that done, too.
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Old 03-26-2019, 10:53 AM
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Originally Posted by Slowbalt2000 View Post


let me know if you need anything
Just starting to look into the pulley replacement. Do you have the pulley puller? I have a bearing splitter and hydraulic press so looking at the ZZP instructions I can get the pulley off. I assume I can make a tool to press it on with a threaded rod and some nut ingenuity.
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Old 03-26-2019, 11:32 AM
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My buddy here in Livonia has one if you want to use it. Thats what I used to swap mine.
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Old 03-26-2019, 12:10 PM
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Originally Posted by exninja View Post
If you enjoyed doing that to the supercharger, there's a market of ecotec-swapped Miatas that would like that done, too.
As long as it isn't going to hit that frame rail, might need to angle the engine like they did with the Solstice.

MIATA Ecotec swapped:


SOLSTICE ecotec on an angle. The engine mounts are custom, but based off of the stock mounts (made jigs off the stock mounts to build the custom ones):

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Old 03-26-2019, 12:12 PM
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Originally Posted by Slowbalt2000 View Post
My buddy here in Livonia has one if you want to use it. Thats what I used to swap mine.
I'll let you know after I acquire the 3.8 pulley!
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Old 03-26-2019, 12:22 PM
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I don't think he needed to, but he may have cut some of the shelf. Tub cutting and forming has been quite common ever since people have shoved LS engines in Miatas. The caveat is once you get to around 250HP you need a different transmission, and the angle of the AR5/Ecotec creates issues like this.
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Old 03-26-2019, 01:02 PM
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Those Miata people are sucking up all the good used engines.
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Old 03-26-2019, 01:35 PM
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It might slow down. It looks like the honeymoon may be over. Anyways, back to supercharging Kappas
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Old 03-26-2019, 01:50 PM
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Originally Posted by Slowbalt2000 View Post
Those Miata people are sucking up all the good used engines.
In the kappa world, Toyota guys are taking all our AR5 transmissions (rwd) to swap into their cars, it bolts right up to JZ engines. Interesting that these Islanders need this 'merican spec'd stuff to make power or not break.
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Old 03-26-2019, 02:32 PM
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Us Michigan folk are going to have to get a meet going or something once we all have our builds up and running.
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Old 03-27-2019, 09:25 AM
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Originally Posted by 07blackg5 View Post
Us Michigan folk are going to have to get a meet going or something once we all have our builds up and running.
Maybe in 2022
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Old 03-27-2019, 11:11 AM
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at this rate, yes
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Old 03-27-2019, 12:10 PM
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Let's just meetup at Slowbalts garage this year and then keep asking why it is taking so long and nod our heads when he responds, then ask again
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Old 03-27-2019, 12:54 PM
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Originally Posted by steelmesh View Post
Let's just meetup at Slowbalts garage this year and then keep asking why it is taking so long and nod our heads when he responds, then ask again
I basically do this every day in our groupchat , but I'm down
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Old 03-27-2019, 01:06 PM
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Originally Posted by steelmesh View Post
Let's just meetup at Slowbalts garage this year and then keep asking why it is taking so long and nod our heads when he responds, then ask again
Don't forget the addition of beer.
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Old 03-27-2019, 01:09 PM
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Im down, then I can have you guys help me.

Beer is a must.
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