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Old 11-17-2008, 04:34 PM   #1
E.A.
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Default Guess the G8 needs a cage now.... 11.00@129

Well, after running the 12.0@118 on the stock wheels and tires on 7psi of boost. I got a little excited and decided to borrow some slicks and skinnies and try again.

But then the "Itch for Boost" started, so I thought "Why not get greedy, and turn it up"

Well, I only got three passes in at the track, but here were the results.
I wanted the 10's so bad I could taste it....but came up .006 short

11.00@129 (Best ET)
11.10@130 (Best MPH)
11.12@112 (Lifted due to hitting the rev-limiter)

So if anyone wants to know how tough the trannys, rearends, and motors are in these wicked lil sedans. She has 4,200 miles of pure abuse on this poor car and its never had a hick up.

100% stock motor (no cam, only changed the spark plugs)
100% stock tranny (not even a converter)
100% stock weight (plus turbos, intercooler, camera, laptop, and myself)

Only thing done to the car is the following.

- Custom Turbo Kit by HOB
- Magnaflow CatBack

I don't know how much power the car makes, cause I have only tuned it on the street, and the track. But I am gonna put it on the dyno tonight to see what she is making.

It made 449rwhp and 521rwtq when it was at 7psi of boost with the stock mufflers. (Haven't dyno'ed it since the MagnaFlow was put on it, but it seemed to pick up quite a bit even at 7psi) I am guessing she is in the mid 600's now based on the MPH it ran. Sure makes for a fun ride with 3 or 4 people in the car.

Sure is nice to drive to the track, run some good passes, then load up the friends back up and drive to dinner. These cars are flipping amazing!

Think she will go 10's on the stock motor and tranny?
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2008 G8 GT
12.03@118.3 on 7.5psi (Pump Gas no Meth, Stock Wheels/Tires)
449rwhp/521rwtq (through the stock mufflers)

11.00@129.5 on 14psi (Race Gas, Slicks)
637rwhp/682rwtq (magnaflow catback added)

Stock Motor, Stock Tranny, Stock Stall, Stock Gear, Stock Weight+ some

Only mods to the car so far:
- Magnaflow Catback
- HOB Turbo Kit
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Old 11-17-2008, 05:13 PM   #2
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well if your confident in the tranny/motor then go for it but i would start upgrading them

oh and BTW, i envy you
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Old 11-17-2008, 05:22 PM   #3
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Awesome times man! Get us some vids of that thing.
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Old 11-17-2008, 05:28 PM   #4
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Quote:
Originally Posted by jwasted View Post
Awesome times man! Get us some vids of that thing.
specifically with good sound...
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2009 G8 GT: Stryker Blue, Premium Package
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Old 11-17-2008, 05:47 PM   #5
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Holy crap! Those are some sick ass times. Any more info on the turbo kit?
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Old 11-17-2008, 05:48 PM   #6
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I would love to have your issue.
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Old 11-17-2008, 06:11 PM   #7
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Tell us about the turbo.

Single, twin?
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Old 11-17-2008, 07:26 PM   #8
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Quote:
Originally Posted by The Commodore View Post
well if your confident in the tranny/motor then go for it but i would start upgrading them

oh and BTW, i envy you
Its getting turned back down to 7.5psi just so it will literally live forever, since its already got thousands of miles at that boost level and has been fine. So until something breaks, no need to mess with it.

Its fast enough at 7.5psi to beat a C6 from a standstill or the highway on the commute to and from work, so thats all that matters. Trust me, plenty have tried....all have failed. (They are obviously stock, but still its funny)


Quote:
Originally Posted by jwasted View Post
Awesome times man! Get us some vids of that thing.
I am gonna upload them in the next couple days, just been busy at work. They will be up on youtube. (Plus I just dynoed it, so I have video of that now)


Quote:
Originally Posted by NIevo View Post
Holy crap! Those are some sick ass times. Any more info on the turbo kit?
Twin Turbos (Bolt right in place of the cats)
Self Contained (No oil lines, no Coolant lines, no cool down time)
Variable Vain (No wastegates, No boost controllers, wicked quick spool)
Front mount intercooler
60# injectors
BAP

Pretty simple to install, if you can bolt on mufflers you can install these things. 4 bolts on each turbo and its mounted and done, then just hook up the piping. If the car had to come in for a recall or something, I could have the whole thing off and back to stock in maybe 2-3 hours tops working slow. Literally not one thing gets cut other then the plastic inner fender liner to let the boost tubes through.

All the information will be up on the HOB website, once dyno time at 7.5psi with the MagnaFlow gets done. Since that is seems to be the most common boost level will be, and what most people will want. (Remember it made 449rwhp 521rwtq with the chocked up stock mufflers, and resonator at 7.5psi)

I'll post tonights Dynograph up tomorrow in the Dyno/Tune section. After leaving the dyno, it literally will break the tires loose and get squirly from a 65mph roll on the highway. (With the stock tires, lol)

Thanks for the compliments guys, means a lot!
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2008 G8 GT
12.03@118.3 on 7.5psi (Pump Gas no Meth, Stock Wheels/Tires)
449rwhp/521rwtq (through the stock mufflers)

11.00@129.5 on 14psi (Race Gas, Slicks)
637rwhp/682rwtq (magnaflow catback added)

Stock Motor, Stock Tranny, Stock Stall, Stock Gear, Stock Weight+ some

Only mods to the car so far:
- Magnaflow Catback
- HOB Turbo Kit
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Old 11-17-2008, 07:42 PM   #9
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What are the prices looking to be? There web site doesn't have much on it? How do you adjust boost? Any more info on the turbo' themselves?
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Old 11-17-2008, 07:49 PM   #10
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Quote:
Originally Posted by NIevo View Post
What are the prices looking to be? There web site doesn't have much on it? How do you adjust boost? Any more info on the turbo' themselves?
You can adjust boost with a normal boost controller if you wanted. I am sure Turbosmart eBoost 2 would be pretty sweet. But if you know you are going to run say 7.5psi then you might as well do that with the controller that is built into the turbo mechanically. Saves you the headache of messing with a boost controller.

All the info will be up on the HOB website soon. Pricing will be in the same area as any other twin turbo system for GM cars. (Just won't have to spend 20+ hours installing it)
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2008 G8 GT
12.03@118.3 on 7.5psi (Pump Gas no Meth, Stock Wheels/Tires)
449rwhp/521rwtq (through the stock mufflers)

11.00@129.5 on 14psi (Race Gas, Slicks)
637rwhp/682rwtq (magnaflow catback added)

Stock Motor, Stock Tranny, Stock Stall, Stock Gear, Stock Weight+ some

Only mods to the car so far:
- Magnaflow Catback
- HOB Turbo Kit
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Old 11-17-2008, 08:07 PM   #11
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I take it that these turbos have an internal wastegate (rather than external). Can't really have NO wastegate, as boost will continue to build...it's what is known as a positive feedback system, and is inherently unstable.

Look forward to further info...
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Old 11-17-2008, 08:07 PM   #12
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Quote:
Originally Posted by E.A. View Post
You can adjust boost with a normal boost controller if you wanted. I am sure Turbosmart eBoost 2 would be pretty sweet. But if you know you are going to run say 7.5psi then you might as well do that with the controller that is built into the turbo mechanically. Saves you the headache of messing with a boost controller.

All the info will be up on the HOB website soon. Pricing will be in the same area as any other twin turbo system for GM cars. (Just won't have to spend 20+ hours installing it)
How exactly does a self-contained turbo work? How reliable are they?
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Old 11-17-2008, 08:21 PM   #13
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Quote:
Originally Posted by MtbDoc View Post
I take it that these turbos have an internal wastegate (rather than external). Can't really have NO wastegate, as boost will continue to build...it's what is known as a positive feedback system, and is inherently unstable.

Look forward to further info...
They are variable vain. They control the flow to the exhaust impeller just like the OEMS do in diesel trucks.

Quote:
Originally Posted by NIevo View Post
How exactly does a self-contained turbo work? How reliable are they?
They use ultra high speed bearings, and an oil reservoir that brings the oil to the bearings. They military uses them for various applications so you know they gotta last. Change the oil every 30k miles and they will live a very long life span.

Gotta think, they don't have to worry about being starved for oil when you turn the car off. They don't have to worry about contamination of the oil from the engine, and the turbo bearings aren't going to add as much heat to the oil as the friction of oil supporting crank and rods is. So all and all, kinda the same reasons that superchargers are all self contained.
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2008 G8 GT
12.03@118.3 on 7.5psi (Pump Gas no Meth, Stock Wheels/Tires)
449rwhp/521rwtq (through the stock mufflers)

11.00@129.5 on 14psi (Race Gas, Slicks)
637rwhp/682rwtq (magnaflow catback added)

Stock Motor, Stock Tranny, Stock Stall, Stock Gear, Stock Weight+ some

Only mods to the car so far:
- Magnaflow Catback
- HOB Turbo Kit
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Old 11-17-2008, 08:34 PM   #14
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I was 100% sold on the magnacharger, now I'm gonna have to look at this and see if I'm still thinking the same way!..........

Yep just looked. Magnaflow is carb aproved and the turbos would go in place of the cats. Since I'm in CA Magnacharger is about my only choice, not a bad one though.

I bet it won't be long befor the pullys on the superchargers get smaller!

Last edited by Morris; 11-17-2008 at 08:39 PM.
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Old 11-17-2008, 08:55 PM   #15
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HOB ??? Sorry have missed it somehow! thanks!
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Old 11-17-2008, 09:38 PM   #16
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HOB ??? Sorry have missed it somehow! thanks!
I believe that would be House of Boost.
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Old 11-17-2008, 10:43 PM   #17
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Do you have a slip breakdown? Just curious as to the 60' with the slicks. Also what kind of slicks were they?
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Old 11-17-2008, 10:44 PM   #18
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Quote:
Originally Posted by Morris View Post
I was 100% sold on the magnacharger, now I'm gonna have to look at this and see if I'm still thinking the same way!..........

Yep just looked. Magnaflow is carb aproved and the turbos would go in place of the cats. Since I'm in CA Magnacharger is about my only choice, not a bad one though.

I bet it won't be long befor the pullys on the superchargers get smaller!
Correct, the stock cats have been replaced with the turbos.
However there has been talks about getting a mid-pipe made that will have hi-flow cats down stream of the turbos.

And no the Maggy is not a bad choice at all, they are very very nice units, and make great power out of the gate. Gotta love their TQ curve
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2008 G8 GT
12.03@118.3 on 7.5psi (Pump Gas no Meth, Stock Wheels/Tires)
449rwhp/521rwtq (through the stock mufflers)

11.00@129.5 on 14psi (Race Gas, Slicks)
637rwhp/682rwtq (magnaflow catback added)

Stock Motor, Stock Tranny, Stock Stall, Stock Gear, Stock Weight+ some

Only mods to the car so far:
- Magnaflow Catback
- HOB Turbo Kit
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Old 11-17-2008, 10:46 PM   #19
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Originally Posted by E.A. View Post
Correct, the stock cats have been replaced with the turbos.
However there has been talks about getting a mid-pipe made that will have hi-flow cats down stream of the turbos.

And no the Maggy is not a bad choice at all, they are very very nice units, and make great power out of the gate. Gotta love their TQ curve
So how quick is the spool on these? Can you really notice any lag or is the spool pretty instant?
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Old 11-17-2008, 10:47 PM   #20
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Quote:
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Do you have a slip breakdown? Just curious as to the 60' with the slicks. Also what kind of slicks were they?

I left the slip at work, but if I remember correct it was 1.7
Not really gonna get much better then that with the stock converter. It takes about 1,700-2,000 rpm to get the turbos to "light off" and sadly the stock TQ converter is so tight, I couldn't get it to that RPM at the line. So basically the light turned green, and I just punched it.

Best ever 60' with the stock tires was 2.2 average of 2.4 due to spin. So the slicks helped tame that instant rush of TQ.
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2008 G8 GT
12.03@118.3 on 7.5psi (Pump Gas no Meth, Stock Wheels/Tires)
449rwhp/521rwtq (through the stock mufflers)

11.00@129.5 on 14psi (Race Gas, Slicks)
637rwhp/682rwtq (magnaflow catback added)

Stock Motor, Stock Tranny, Stock Stall, Stock Gear, Stock Weight+ some

Only mods to the car so far:
- Magnaflow Catback
- HOB Turbo Kit
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