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

Twincharged LSJ

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Old 07-28-2018, 03:45 PM
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Twincharged LSJ

just got our twincharged setup finished and thought I would share with you guys.
This is an s256 turbo with the stock blower with a 3.6 pulley, ported head with 76# valve springs. We bought this thing for $1,100 a year ago and had extra parts laying around and decided to make a twincharged daily.






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Old 07-28-2018, 05:17 PM
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Will the m62 choke the s256?
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Old 07-28-2018, 05:18 PM
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Are you scrapping the TVs setup?
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Old 07-28-2018, 05:19 PM
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Originally Posted by 63 Nova SS
Will the m62 choke the s256?
its not going to be crazy power. High 300s to low 400s. High boost on e maybe mid 400s.
And no my car is still tvs. We have 3 cobalts. Lsj, le5 and lnf
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Old 07-28-2018, 05:47 PM
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It sounds like it idles nicely. Any vids on the dyno or doing pulls on the open road?
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Old 07-28-2018, 07:08 PM
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No. It’s only been running for a couple of hours lol
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Old 07-28-2018, 08:27 PM
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Yes it does idle nice.
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Old 07-28-2018, 09:25 PM
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It’s so loud it hurts to drive. Open downpipe right now because the zzp catback doesn’t match the Ottp downpipe. Zzp has a different flange. So have to get that changed. And it’s external dump
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Old 07-28-2018, 09:45 PM
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Nice
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Old 07-28-2018, 10:47 PM
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Are you doing it just to do it? It's pretty cool, but that 256 on its own could go 450?
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Old 07-28-2018, 11:16 PM
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Originally Posted by 63 Nova SS
Are you doing it just to do it? It's pretty cool, but that 256 on its own could go 450?
much better streetability with the blower on there
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Old 07-29-2018, 12:02 AM
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Originally Posted by 63 Nova SS
Are you doing it just to do it? It's pretty cool, but that 256 on its own could go 450?
yes but it’s a different power band
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Old 08-02-2018, 10:16 PM
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Originally Posted by chevygirl2006

just got our twincharged setup finished and thought I would share with you guys.
Dang . . . good work, that's really cool!
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Old 08-04-2018, 08:34 AM
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Awesome build. Would love to see some videos of it doing some pulls. You ever figure out what went wrong for sure with your TVS setup?
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Old 08-04-2018, 02:23 PM
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It’s running ok. Needs to be tuned a little more. And mine we don’t know for sure.
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Old 08-04-2018, 03:26 PM
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Which sadly means it can happen again.
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Old 08-04-2018, 04:54 PM
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Originally Posted by 63 Nova SS
Which sadly means it can happen again.

well the only thing we used on both motors that was the same was the head. This time it’s a completely different head. Also going to tune it a little richer.
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Old 08-04-2018, 11:31 PM
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Ran our friends focus st. Focus has intercooler, downpipe, intake and cobb tune. This was just for fun and was tuning in the process. Car breaks up bad up top as you can hear in the video. The injectors are way maxed. This was about 22psi and e47.

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Old 08-05-2018, 08:13 AM
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Seems like you started in too low of gear when the rpm was at 2,500?
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Old 08-05-2018, 11:13 AM
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It was 3rd
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Old 08-05-2018, 05:39 PM
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I agree it does sound awfully low in rpm, but you know better than us.
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Old 08-05-2018, 06:26 PM
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Can only do so much when the stock clutch is slipping.
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Old 08-09-2018, 06:45 PM
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i wonder how it would do at low rpm with a smaller pulley.
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Old 08-09-2018, 06:47 PM
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how are the IAT with the stock charge cooling
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Old 08-09-2018, 10:33 PM
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Not putting a smaller pulley on it at that race in the video the iat was about 137. And it has a dual pass
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