ls9 Supercharger
Race Director
Joined: Aug 2005
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From: Hudson WI
NCM Sinkhole Donor
Based on what I have read, it appears that it will bolt on, but you don't have the bigger headbolts and other items that are required to make the thing live for more than a couple of hundred miles.
Safety Car
Joined: Sep 2007
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From: Los Alamitos California
St. Jude Donor '09
Le Mans Master
Joined: Jan 2003
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From: Portland Oregon
You will have to buy the whole front end accessories, including the crank hub which is keyed the the LS9 crank. Or you can have a aftermarket ATI pulley made for driving the blower. Its not going to be cheap to do but is possible.
Le Mans Master
Joined: Jan 2003
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From: Portland Oregon
Race Director
Joined: Aug 2005
Posts: 13,592
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From: Hudson WI
NCM Sinkhole Donor
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Racer
Joined: Aug 2006
Posts: 302
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From: Cincinnati Ohio
It will be coming out soon. I don't know when, but it will be a direct bolt on to the LS3 engine. I'd say changing pistons & head bolts would be a good idea. I guessing it would be real hard on head gaskets. My 2 cents.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
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From: Portland Oregon
Ten PSI of boost is going to be hard on headgaskets. That is why GM upsized the head bolts. I would think using studs and MLS gaskets would be just as good as upsizing the bolts 1mm. Swapping to forged pistons would be a good idea on any blown application. Then you can drop the CR down to 9:1 as it is now your LS2 or LS3 engine is nearly 11:1 and at 10 PSI that is going to be way to high for that compression.
Racer
Joined: Aug 2006
Posts: 302
Likes: 0
From: Cincinnati Ohio
Ten PSI of boost is going to be hard on headgaskets. That is why GM upsized the head bolts. I would think using studs and MLS gaskets would be just as good as upsizing the bolts 1mm. Swapping to forged pistons would be a good idea on any blown application. Then you can drop the CR down to 9:1 as it is now your LS2 or LS3 engine is nearly 11:1 and at 10 PSI that is going to be way to high for that compression.
Who said anything about 10 psi? Where did 10 psi com from?
I'm confused!
Race Director
Joined: Aug 2005
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From: Hudson WI
NCM Sinkhole Donor
Let us know how it works out.
Thread Starter
Racer
Joined: Jul 2007
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From: Ft Worth Tx
Yes i know it would take alot more than just mounting up to the heads but as long as that can be dune i think the rest would just fall into place and as far as longer head bolts how hard can that be my car is a z51 so i dont think stoping will be a problem but yes you are probably right about the diff i dont think the a4 will hold up 
ps if are when i do the project ill let yall know
ps if are when i do the project ill let yall know
Somba master
Joined: Mar 2005
Posts: 10,554
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Cruise-In 7, 9 & 12 Veteran
Wounded Warrior Escort '11
St. Jude Donor '07-'08-'09-'10-'11
After reading all the changes to the ls3 theydid to make the ls9, a crate ls9 sounds like a lot better idea. But I don't think you'll get one for $20k.
GM
GM
Team Owner
Joined: Aug 2003
Posts: 38,314
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Yes i know it would take alot more than just mounting up to the heads but as long as that can be dune i think the rest would just fall into place and as far as longer head bolts how hard can that be my car is a z51 so i dont think stoping will be a problem but yes you are probably right about the diff i dont think the a4 will hold up
ps if are when i do the project ill let yall know
ps if are when i do the project ill let yall know
Let us know how you come out, and how well your A4 transmission holds up under the new power.
Burning Brakes
Joined: Dec 2007
Posts: 1,015
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From: Maryland
St. Jude Donor '08
For my money and warranty peace of mind; I would wait for Magnuson Products to release a new positive displacement Maggie SC for the 08 LS3 engine platform.
The Maggies are tried and true and usually good for an additional 130 more HP on a stock motor; they are plug and play vehicle specific applications and they offer a 3 year/36000 mile power train warranty.
LT Headers and a Maggie on an LS3 engine with a hot tune should easily put you at 650+ BHP.
The Maggies are tried and true and usually good for an additional 130 more HP on a stock motor; they are plug and play vehicle specific applications and they offer a 3 year/36000 mile power train warranty.
LT Headers and a Maggie on an LS3 engine with a hot tune should easily put you at 650+ BHP.
Racer
Joined: Aug 2001
Posts: 451
Likes: 0
From: Ft Lauderdale Fl
For my money and warranty peace of mind; I would wait for Magnuson Products to release a new positive displacement Maggie SC for the 08 LS3 engine platform.
The Maggies are tried and true and usually good for an additional 130 more HP on a stock motor; they are plug and play vehicle specific applications and they offer a 3 year/36000 mile power train warranty.
LT Headers and a Maggie on an LS3 engine with a hot tune should easily put you at 650+ BHP.
The Maggies are tried and true and usually good for an additional 130 more HP on a stock motor; they are plug and play vehicle specific applications and they offer a 3 year/36000 mile power train warranty.
LT Headers and a Maggie on an LS3 engine with a hot tune should easily put you at 650+ BHP.
That is right on the money with what Callaway is specifying with the Callaway/Magnusen SuperCharger on the LS3/2008 C16. With a Callaway install on a new car they match the 5 Yr/100K GM power train warranty.
-Luigi
