You drive anything that's modded hard enough... And it blows up... My Subaru went through 4 engines and 3 transmissions before I gave up and sold it.. Now it was the 'Vette's turn: 30K miles on boost an the factory Hypereutectic piston broke off a ring land...


Fortunately, winter had just begun... So I had the time to fix it myself... Taking the heads off and pulling it out the top wasn't so bad:


The new build:
Engine block: LS2 Balanced, blue printed, honed to 365 cu in (6.0L)
Compression Ratio: 9.8:1
Crankshaft: GM LS2, 3.622” stroke with 58X reluctor, indexed and trued journals.
Connecting Rods: Callies Compstar 6.125” H-Beam w/ARP 2000 7/16” bolts.
Pistons: Wiseco Forged 4.005” X 1.300” x -11, tool steel wrist pins and anti friction coating on skirts.
Rings: Top: Total Seal 1.2 stainless, 1.2 napier, 3mm oil.
Main bearings, Rod Bearings: Clevite H series.
Cam bearings: Dura Bond one piece.
Main cap Fastners: ARP Studs.
Cylinder head Fastners: ARP Pro series 12pt studs.
Heads: LS2, resurfaced, re-lapped valves, 64cc chamber volume.
Head gaskets: GM MLS 6.0L.
Lifters: GM LS7.
Push rods: Manley 7.400x5/16”
Camshaft: GM ZR1: Duration at 0.050”: 210 / 242, Lift: .562” int, .557exh, 122LSA.
Timing set: N Motion LS2 4x Double Roller, torington bearing and nitrated gears.
Valve Springs: PAC Dual with Titanium Retainers.
Seat pressure: 145lbs, Open Pressure: 425lbs.
Installed height: 1.800”, Coil bind: 1.090”.
Valve seals: Viton w/steel jacket.
Oil Pump: Melling HP Ported.
Balancer: Power Bond stock dia 6-rib SFI w/ARP bolts with machined keyway.

Clearances:
Piston to bore: 0.004”.
Main and rod bearings: 0.0025”.
Ring end gap: 0.024” top, 0.026” bottom.
Deck height: 9.232”.
Quench: 0.050” with/0.050” gasket.
Piston to valve: .100”+ intake and exhaust







Dual Valve Springs, titanium retainers:

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SuperCharged Corvette C6 Z51
200MPH daily driver...

Of course, since I was building the engine with race components, I might as well upgrade other stuff while I was at it...

Got an RPS Twin Disk Carbon-Carbon clutch, 22lbs lighter than stock, rated for 850 ft-lbs torque... It drives like stock! I love it...




Also got new engine mounts, a digitally controlled methanol injection kit, and a bigger blower (Paxton Novi 1500). It has been pullied down 2 steps further, which will work out to about 15PSI at the engine's new 7200RPM redline, despite the bigger camshaft, which would normally drop the observed boost level:


To further improve weight distribution, along with the 22lbs I removed from the clutch, I replaced the factory battery for a Braille (-20lbs) and moved it into the rear of the car:


Fabricating a new wiring harness:


Also got a new intercooler, with shorter plumbing runs and a "ram-air" design using metal diverters to force all the airflow through the core:


Completed project:




I drove it off this Thursday

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SuperCharged Corvette C6 Z51
200MPH daily driver...

The Methanol injection is wired in but not hooked up yet. Also, because of the cam, the bigger supercharger and the smaller pulley, the engine requires HUGE injectors (8 x 900cc!), which is too much for the factory fuel system... So after loading up a safe tune, I am breaking it in gently, then I will swap out the pump, finish the meth injection, and dyno tune.
It should be good for somewhere in the 700WHP range, still on 93 octane, still daily driven. I plan to pulley it down further later on in the year for the Texas Mile, and have a go at breaking 200MPH in the standing mile; it'll need close to 800RWHP for that, and the blower should be good for it on a race gas tune. We'll see! For now I can say that the car feels like it is a thousand pounds lighter; the supercharger is being spun so much faster that it makes a lot more boost, a lot sooner; just a little bit of throttle and it really starts to go... I've very happy with how it turned out so far Incidentally, the Mile is on October 22-24,2010, if anyone wants to caravan down there. Its one hell of an event, with plenty of cars that make mine looks absolutely, positively slow

First start:

First drive:

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SuperCharged Corvette C6 Z51
200MPH daily driver...

Looks like it should be kinda fast! Nice job on the build, let us know why you dyno it!

Chris

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SHU188mph

I was really hoping for a little more from the video. I can appreciate not wanting to blow up a fresh motor though. Looking forward to seeing how this thing runs once it has proper fueling and tune.

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- josh.

Plabs, looks like you've been busy.

Get some dyno numbers up.

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shame you're such a douchetool

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“A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.”
-Jeremy Clarkson

Very nice! Should have went with a 4.0" crank though, more cubes more power!

Let me know when you're down in Texas at Hen's place for the Texas mile, they just had one.

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Yeah, I agree... I was going to stroke it (402) but then ended up having to buy a new engine block instead (cylinder was cracked). And kept it as a 365 because it was already getting so expensive.
Plus, its supercharged; the blower is what's really limiting the horsepower; they make make more torque when stroked but not really any more power. Then somewhere before 800RWHP the stock heads become the main restriction.

More goodies:

Two piece lightweight brake rotors (-7lbs per corner):


Air/Oil separator (Catch Can):


TurboSmart Supercharger Bypass Valve (BOV) (My Vortech BOV broke!):


The new BOV vs the old one:

YouTube- Vortech Vs TurboSmart Supercharger Blow Off Valve Comparison
Also put a larger fuel pump in the tank and rebuilt the transmission with new bearings, new synchros, tool steel retainers, bronze shifter forks, etc.
Now I have to finish installing my methanol injection kit (got the digital progressive controller in, but I was waiting on a custom tank for the driver's side cubby hole in the trunk):


With that in place I will corner balance the car, do a performance alignment, and the final dyno tune. Just in time for a race in Indianapolis on the 6th, I hope!

Next Texas Mile is on October 22nd. I will definitely be there

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SuperCharged Corvette C6 Z51
200MPH daily driver...

Figured I'd update the thread...

Dyno Video: YouTube- Built motor supercharged corvette dyno #2 YouTube- Built motor supercharged corvette dyno #2
Dyno:

It hit 15PSI at 7000RPM. Boost plot here


684RWHP/580RWTQ on a 95 degree day. I was hoping it'd hit 700, but this will do for now. It gained power and torque everywhere from the smaller pulley, so it feels much, much faster.

Took it to E-town this weekend for a Show And Go. The autocross was awesome but I got booted off the track on my 1st pass. I figured I'd run it nice and easy since it was on my street tires; got a 2 second sixty foot and shifted slowly, but it still put down an 11.2@ 132mph. Not putting a cage, so too bad if I can't drag race it.
Its fun I need to find a better way to mount my radar detector though; it will pop off the glass in 1st AND 2nd gear now.

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SuperCharged Corvette C6 Z51
200MPH daily driver...

I did make it to the Winged Warrior Imports Vs Domestics race in Indy back in May too. Came 3rd in the race car class. 1st 2nd and 4rth got trailered in on slicks (110+ cars total), I drove up from 850 miles away, took my luggage out of the trunk and went for it. Car wasn't tuned yet, so it still had a lot more in it.



Autox:


Drags:


I also installed a holographic Heads Up Display:


And a Carbon Fiber center console:

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SuperCharged Corvette C6 Z51
200MPH daily driver...

I love that holographic display it must be really good, as that hologram of the girl being in the same room as you under her own accord looks very life like!

Nice numbers, tune that beast hit her with a little meth and crank the booooost up.

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Ha. Ha.

I'm pretty happy with it as-is... This is plenty for daily driver and road trip duty; traction is a bigger limiting factor on how fast the car is at this point anyways... Burnouts at freeway speeds get old after a while and I can do them at 70+MPH already...
I'll do a race gas tune for the Texas Mile in Oct though.

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SuperCharged Corvette C6 Z51
200MPH daily driver...

plabs, why is she drinking rubbing alcohol out of a champagne glass?

were you celebrating?

Attached Thumbnails

 

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Or is that just the drink of choice for you North Carolinians?

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Let me know when you get here for the mile, its a short drive from my house! Hopefully mine will be done by then....engine parts are on back order

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