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Speartech LS9 Supercharger Swap!

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Old 10-16-2009, 09:59 AM
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Originally Posted by rsz288
Now that you have teased us all into a state of envy and frenzy, are you going to do an aftermarket LS9 S/C kit John?
After chasing down most of the parts for two systems now, it wouldn't take much to put a kit together!

Some of the parts are still costly and hard to get. Maybe that will change in the near future.
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91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno

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Old 10-16-2009, 10:15 AM
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I'd imagine a kit for the TVS 1900 off of a Cadillac CTS-V would be a little easier to put together. It looks like it uses the same power steering, alternator, and A/C components (including mounting hardware and belt drive) as the previous CTS-Vs. The intercooler is a little cheaper too.
Old 10-19-2009, 03:05 PM
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Originally Posted by CarsandWomen
i love that yall did all that custom work to the blower just cuz you didnt like the IC plumbing location and apperance LOL. thats super clean though, job well done and super fierce sleeper! did you do anything performance wise to it other than the heads? pulley, port blower etc?

come to Texas out tracks are always open and HRP is a fast track
I'll be upgrading the pulley soon.

I want to get some times with it the way it is, and then go with the small pulley and see what difference it makes:

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91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno

www.speartech.com

Last edited by Speartech; 10-22-2009 at 07:30 PM.
Old 10-19-2009, 09:00 PM
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how many lbs with the stock pulley vs smaller?
Old 10-20-2009, 02:55 PM
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That's really cool - I didn't realize the throttle body neck was bolted on, and came off like that. Is it as easy as it looks to swap out?
Old 10-21-2009, 11:53 AM
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Originally Posted by 3.8redbird
how many lbs with the stock pulley vs smaller?
I'm getting around 10# right now. The smaller pulley is supposed to add 3-4#.

We'll see.
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Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno

www.speartech.com
Old 10-21-2009, 12:14 PM
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Originally Posted by Speartech
I'm getting around 10# right now. The smaller pulley is supposed to add 3-4#.

We'll see.
the zr1 gets 10.5 stock i believe. that extra 3-4 should pump it up pretty good

what injectors are you running? Fuel pump?

How many #s can the sc make before becoming inefficient
Old 10-21-2009, 06:28 PM
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For some reason, I am no longer able to see the pics John.
Old 10-21-2009, 09:01 PM
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i dont see the pics either

so with this thing being so much lower than a typical roots/twin screw kit, is there 4th gen f body potential?
i figure someone would have done it by now if there was
Old 10-22-2009, 06:43 PM
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Originally Posted by 3.8redbird
the zr1 gets 10.5 stock i believe. that extra 3-4 should pump it up pretty good

what injectors are you running? Fuel pump?

How many #s can the sc make before becoming inefficient
Siemens 60#

Twin Bosch 044's

I don't know. Less than on the ZR1 because this a 408 CI engine.
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Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno

www.speartech.com
Old 10-22-2009, 06:45 PM
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Originally Posted by Reckless
For some reason, I am no longer able to see the pics John.
I think the hosting site took a dump or something. I've got the IT staff moving the pics now. Should be back up shortly.
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Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno

www.speartech.com
Old 10-23-2009, 07:23 AM
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What size cam you have in this 408?
Old 10-23-2009, 09:26 AM
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Awesome swap! Thanks for all of the pics. That was really cool to see the differences. Yeah they did some great engineering fitting that all in the valley. Keeping the mass lower for the handling as well as the hood bulge was a concern when they designed the ZR1. Glad to see it already running and can't wait to see how it performs for you.
Old 10-23-2009, 08:36 PM
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Originally Posted by No Juice
What size cam you have in this 408?
Sig wise it looks like an LPE GT2-3
Old 10-24-2009, 03:09 AM
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Incredible work guys!
Old 10-24-2009, 10:06 AM
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So is this going to be a one-off deal, or are you guys gonna try and make a kit out of it?
Old 10-24-2009, 10:14 AM
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Please make this a package deal! That 2300 would fit nicely under my CTS-V hood!
Old 10-24-2009, 12:48 PM
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I'm not up to speed on the new motors. Can the Ls9 heads be bolted onto a stock cube LS1 or do they only work on the larger motors?
Old 10-25-2009, 04:43 PM
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Originally Posted by solobaric
I'm not up to speed on the new motors. Can the Ls9 heads be bolted onto a stock cube LS1 or do they only work on the larger motors?
You need at least a 4.000 bore.
Old 10-25-2009, 06:10 PM
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Originally Posted by solobaric
I'm not up to speed on the new motors. Can the Ls9 heads be bolted onto a stock cube LS1 or do they only work on the larger motors?
In addition to 4.0"+ bore, the LS9 uses M12 head bolts. Holes may be larger.


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